574 results about "Finite element analysis software" patented technology

The invention provides a method for constructing a vertebral three-dimensional geometry and finite element mixture model, which belongs to the technical field of processing of medical images. The method comprises the following construction processes of: inputting a vertebral computer tomography (CT) image; performing three-dimensional reconstruction and three-dimensional cutting on the CT image to acquire a vertebral three-dimensional image set; establishing a three-dimensional geometric statistical model, namely defining and manually calibrating vertebral characteristic points, aligning and registering vertebral images, and training a sample set to acquire the statistical model; and generating a finite element model, importing the statistical model, generating a surface mesh model, and generating a volume mesh model, wherein the model can be directly imported into finite element analysis software for biomechanics analysis. By the method, a vertebral geometrical shape can be precisely described, the accuracy of finite element analysis results can be ensured, and the precision of vertebral models can be improved. The method is convenient to use, facilitates the scientific measurement of the shapes and the stress of vertebras and can be used for researches related to vertebral columns and the vertebras in the field of surgical medicine.

A spindle thermal distortion compensation method for a precision horizontal machining center comprises the steps as follows: a spindle model of a machine tool is simplified structurally; an ANSYS (finite element analysis software)-Workbench is utilized to perform mesh generation on a spindle entity model that is simplified, so as to obtain a spindle finite element model; and boundary conditions are calculated by combining with the practical spindle rotational speed, the environmental temperature, the coolant velocity, the flow rate, the inlet and outlet oil temperature and the like, and configuration is performed. Thermodynamics analysis and statics analysis are carried out in the ANSYS-Workbench to obtain more accurate spindle temperature field distribution and thermal deformation. Based on a finite element emulation result, the spindle temperatures in different positions and the spindle thermal deformations are analyzed at different rotational speeds by utilizing the Spearman rank correlation analysis, and spindle thermal key points are found out, so that references are provided to spindle thermal error tests and thermal error compensation. Finally, a thermal error compensation model is built up by utilizing a least squares method according to the key point temperature of the spindle and the thermal errors in the practical tests. Based on the thermal error compensation model, the spindle thermal error compensation is carried out by combining with thermal error compensation strategies of a numerical control system of the machine tool.

The invention provides a method for predicting the fatigue life of a BGA (Ball Grid Array) welding spot under heat-vibration combined loads, comprising the following steps of (1), establishing the finite element model of a single BGA welding spot by adopting finite element analysis software; (2), carrying out heat cycle simulation on the BGA welding spot according to the conditions of a working environment; (3), calculating the damage rate of the BGA welding spot under heat cycle loads according to the result of heat cycle simulation; (4), carrying out random vibration simulation on the BGA welding spot under various temperature conditions; (5), calculating the damage rate caused by random vibration loads, of the BGA welding spot under the influence of heat cycle loads; (6) calculating the total damage rate of the BGA welding spot under the common action of the heat cycle loads and the random vibration loads; (7), calculating and obtaining the predicted service life of the BGA welding spot under the heat-vibration combined loads. By the adoption of the method, the precision of predicting the fatigue life of the BGA welding spot under the heat-vibration combined loads in practical production can be improved, and certain project application values are provided.

The invention discloses a method for dynamic modeling on an entire numerical control machine tool based on kinetic parameters of a joint part and analyzing and optimizing dynamic performance and an implementation scheme. The method disclosed by the invention takes a certain type of a vertical machining center as an example, dynamic model building and parameter identification are carried out on a bolt joint part, a guide rail sliding block joint part, a ball screw joint part and a bearing joint part, the dynamic performance of the entire numerical control machine tool is analyzed by combining finite element analysis software, an optimization object is established on the basis, a multi-objective optimization model is constructed, and the best optimization configuration is solved, so that the dynamic performance of the entire numerical control machine tool is optimized. Achievements of the method disclosed by the invention can be used for solving problems finite element analysis and optimization on the dynamic performance of the entire numerical control machine tool, and technical support is provided for improving processability of the numerical control machine tool.

The invention discloses a BP and GA based blade machining cutting quantity optimization selection method. The method comprises: establishing an aluminum alloy blade milling model by taking a spiral milling process of a ball end mill as a research object; simulating milling of blades of an aeroengine by using ABAQUS nonlinear finite element analysis software; summing up a change pattern between a cutting parameter and a deformation amount in milling simulation and a relationship between the cutting parameter and the deformation amount by using an artificial neural network algorithm, and establishing a blade milling deformation prediction model; and determining a design variable, a target function and a constraint condition for cutting parameter optimization, constructing a cutting parameter optimization model of aluminum alloy blades, and optimizing the cutting parameter by using a genetic algorithm. According to the method, the functional relationship between the deformation amount and the cutting parameter is established, and the cutting parameter optimization model is established, thereby providing a reasonable and quick cutting parameter selection method to guide actual production.

The invention provides a calculating method of ultimate strength checking of connection of a flange and a bolt. The method comprises the following steps: sampling a finite element analysis software as a platform to conduct modeling, conducting mesh generation with a finite element, setting load of a connection structure and boundary conditions, and conducting calculation to obtain the stress condition of the bolt, wherein the setting of the load of the connection structure and the boundary conditions is particularly as follows: the relation between an upper flange and a lower flange is the standard friction contact relation in a model; a high strength gasket and a bolt nut, and a high strength gasket and a bolt screw cap are connected by adopting a conode way; the high strength gasket and the upper flange, and the high strength gasket and the lower flange are connected by adopting a binding contact manner; the structural node space coordinates system of a tower cylinder restraining the bottom end of the lower flange is the degree of freedom in three directions of X, Y, and Z; a node is built in the center of the upper flange, and is connected with the top end of a tower cylinder model by multipoint restriction of a beam element, and an ultimate working condition load is applied in the center of the upper flange; each connection bolt applies bolt pretension force. The bolt stress intensity and danger positions calculated by the method are higher in accuracy.

The invention discloses a three-point support optimization design method of a machine tool bed based on a response surface model. The method comprises the steps that a simplified model of a bed structure is established in CAD (Computer-Aided Design) software; three-point support limiting positions are found; a variable design space and an optimization objective are determined; test sample points for statics analysis are selected from the design space, and subjected to the statics analysis by finite element analysis software; a response value is calculated and extracted; a second-order response surface model, reflecting an input-output relation of structural design, of deformation at guide rails of the bed is established according to the response value; an optimal solution of the response surface model is acquired by a genetic algorithm; based on the established second-order response surface model, three-point support positions when the deformation of the guide rails is minimum are found; a practical model of the bed is subjected to the statics analysis; and the reliability of three-point support optimization design is verified. With the adoption of the method, the deformation of a machine tool is reduced; the machining precision of the machine tool is improved; the three-point support optimization efficiency and the optimization precision are improved; and the problems that the calculation amount is large, the efficiency is low, and an optimal result cannot be ensured easily in the existing optimization technique are solved.

The invention relates to a simulation analysis method of the vibratory response of a variable working condition single-stage heavy gear case containing a crackle fault, which comprises the following steps: establishing a gear pair 3D solid model containing a crackle fault on the basis of 3D design software SolidWorks; leading the model into finite element analysis software ansys, programming a program capable of calculating the gear meshing rigidity of any meshing positions by combining menu operations of the ansys and APDL languages and outputting a result data file of the meshing rigidity; establishing a damping gear case system kinetic model of 8 degrees-of-freedom and kinetic simultaneous differential equations considering factors of the rigidity and the damping of a shaft and the case, an input torque and a load torque of a motor, and the like and utilizing MATLAB to solve the equations so as to simulate the system vibratory response of the single-stage heavy gear case containing a crackle fault. The invention integrates the advantages of the SolidWorks, the ansys and the MATLAB and can quickly and accurately simulate the vibratory responses of variable working condition heavy single-stage heavy gear cases containing various different forms of crackle faults.

The invention discloses a method for estimating the development height of an overlying strata water flowing fractured zone of solid filling and coal mining. The method comprises the following steps: establishing a solid filling and coal mining numerical value model by using finite element analysis software according to the collected engineering geological condition information of a filling and coal mining working surface and the physical and mechanical parameters of coal-rock mass obtained by a rock mechanics experiment; simulating the height of an overlying strata plastic region under the conditions that the mining height M and the fullness ratio are changed, then simulating the height of the overlying strata plastic region under the conditions that the fullness ratio is unchanged and the mining height M is changed, and determining the height of the plastic region to be the development height H of the water flowing fractured zone; on the basis of the simulating result, performing multiple regression to obtain a relational expression of the fullness ratio mining height M and the development height H of the water flowing fractured zone; according to the actual engineering parameters of filling and coal mining, designing the actual mining height Mc of the fullness ratio and calculating the development height Hc of the overlying strata water flowing fractured zone. The method provides a reference for accurate estimation of the development height of the overlying strata water flowing fractured zone of the solid filling and coal mining, and provides a theoretical reference for safety mining of a coal seam under a water-bearing layer.

The invention discloses an automatic data conversion method between a three-dimensional modeling software and a finite element analysis software, which comprises the following steps of starting the finite element analysis software, loading the model and performing finite element analysis; starting the three-dimensional modeling software in the finite element analysis software; reading files and performing finite element analysis in the finite element analysis software; saving the result in format of data file by utilizing a data post-processing module and the read and write function of the finite element analysis software; and circularly running the above processes by utilizing the process control command of the finite element analysis software. The automatic data conversion method achieves seamless integration of the powerful modeling function of the three-dimensional modeling software and the finite element function of the finite element analysis software and provides a scientific, high-efficiency and reliable solution for design and analysis of a complicated mechanical system, thereby increasing the product design accuracy and design efficiency.

The invention relates to a method for the simulation analysis on the meshing stiffness of a cylindrical spur gear undergoing damaged single-tooth failure. The method comprises the following steps: firstly, setting the correction coefficient of the meshing stiffness of single-tooth and double-tooth meshing section on the basis of the calculation results of the average stiffness according to the finite element method and the national standard method, so as to improve the calculation accuracy of the meshing stiffness of a normal gear according to the energy method; secondly, establishing a finite element model of the spur gear undergoing damaged failure targeting on the failure location of the spur gear by combining the three-dimensional modeling software and the finite-element analysis software, and compiling a simulation calculation program by using the computer language, so as to calculate the time-varying meshing stiffness; and finally, integrating the calculation results of the two steps to obtain the integrated meshing stiffness of the spur gear. By fully integrating the advantages of the corrected energy method and the finite element method, the invention can not only guarantee the calculation accuracy, but also improve the calculation efficiency. The method of the invention for the simulation calculation of the meshing stiffness of the gear undergoing damaged single-tooth failure is effectively applicable in the research on the vibration response mechanism of a gear system.

The invention provides an electronic product vibration DLP method based on cross-power spectrum function mode parameter identification. The method comprises the following steps of arranging acceleration sensors on a circuit board; uniformly arranging the acceleration sensors on a single-surface testing circuit board; selecting an online monitoring device, and performing connecting mounting on the online monitoring device; determining a cross-power spectrum function algorithm on a random vibration condition, and generating a cross-power spectrum density function; performing derivation of a mode parameter identification algorithm, and obtaining a first-order frequency and a damping ratio; and performing residual service life estimation by means of a Steinberg model. According to the electronic product vibration DLP method, finite-element analysis software such as vibration analysis software and simulation software are not required for simulating a vibration response mode. A vibration response data collecting operation can be finished just through the acceleration sensors and data collecting equipment. The electronic product vibration DLP method overcomes a defect that partial parameters of existing service life prediction software are empirical parameters which cannot be accurately calculated. Furthermore the first-order frequency and the damping ratio can be calculated through applying a mode identification method.

The invention relates to a method for monitoring the safety of an ocean platform on the basis of displacement sensors and belongs to the technical field of ocean platform monitoring. The method comprises the following steps of (1) calculating and analyzing the whole different working conditions of the ocean platform, and establishing a database by a finite element analysis software; (2) designing a pre-alarm system according to the displacement of the central point of a deck, equipment or operation restrictions, and extreme operating conditions on the ocean platform; (3) arranging the displacement sensors; (4) acquiring and transmitting data of the displacement sensors; (5) establishing a signal demodulation control system to facilitate the analysis and the processing of a computer, wherein the control system is used for controlling and managing the equipment; and (6) importing the data into the database, establishing an estimating system, and reflecting the safety status of the whole structure of the platform in real time by monitoring, analyzing and processing position signal data. An estimating way is simplified by the method, the method has the characteristics of monitoring in real time, wide application range, high monitoring precision and the like, and the safety of the structure of the ocean platform can be intelligently and accurately monitored and pre-alarmed.

An individualized design method for a diabetic foot shoe pad comprises the steps that firstly, a general foot bone model is established, then key size data of the diseased foot is acquired, the general foot bone model is scaled to obtain an individualized bone model of the diseased foot, then three-dimensional data of surface appearance of the diseased foot is acquired and is coupled with the individualized bone model, and assembly is performed in CAN software to obtain an individualized three-dimensional model of the diseased foot; then, based on the three-dimensional model of the foot, a diabetic foot shoe pad base model completely fit with the foot is established according to foot bottom appearance characteristics and is imported into finite element analysis software with the three-dimensional model of the foot to perform assembly and grid partitioning, a finite element model of a foot-shoe pad is obtained, then a stress distribution result is analyzed and calculated, the modulus and structures of zones of the diabetic foot shoe pad base model are modified to form a final diabetic foot shoe pad model. The designed shoe pad meets the individualized demand, meanwhile a product design period is shortened, and the cost is reduced.

The invention provides a parameterization reconstruction algorithm of a quadrilateral finite element grid model. By taking a quadrilateral grid model obtained by finite element analysis software as the basis, a unit number and a node coordinate of the quadrilateral grid model are used as input information for reconstructing a topological relation between quadrilateral grid units; merging operation including unit grid standard merging, block domain self-adaptive merging and the like are carried out according to obtained topological information, so that the quantity of block domains is reduced and merged sub-domains are obtained; characteristic points on boundaries of the sub-domains obtained by merging are remained and are connected to form a certain quantity of quadrilateral final sub-domains; and finally, a body parameterization model is obtained by carrying out construction, adjustment and optimization of a body parameter model according to the boundaries of the obtained final sub-domains. The algorithm can be used for carrying out parameterization reconstruction on the quadrilateral grid model of structures including a porous plate and the like, and the obtained body parameterization model is applicable to isogeometric analysis; and the algorithm has the advantages of simplicity in expression, whole-domain smoothing and the like.

The invention disclose s an involute bevel gear tooth end relief and parametric modeling method which includes the steps of building a three-dimensional model of a bevel gear without the relief; building a finite element model of the bevel gear without the relief; determining 4 key engaging positions in the gear engaging process according to the gear engaging period to obtain the gear circumferential displacement difference value and the tooth width-direction equivalent contact stress distribution; determining the relief amount and the relief length of the tooth end relief; building a relief curve equation and a relief tooth surface equation; realizing the primary modeling of the relief curve and the tooth surface after the relief, and building a three-dimensional model of the relief gear; analyzing the gear after the relief by finite element analysis software and comparing the gear after the relief with a gear without the relief. The tooth surface contact condition is improved, the vibration noise in the gear engagement is reduced, and the NVH quality of the gear is improved.

The invention relates to a method for improving an optical element additional surface shape caused by force of gravity, and a clamping system thereof. The method utilizes the lever principle, and aims at a heavy-calibre ultrathin transmission-type optical element under the condition of effective clear aperture. Through the clamping system provided by the invention, finite-element analysis software is adopted to carry out modeling simulation and determine lengths, widths and positions of a support strip and a pressure strip as well as force applied onto the pressure strip in the clamping system when the optical element is placed to be balanced at different work gestures and has the minimum additional surface shape change. Through changing the force applied onto the pressure strip, the optical element in the clamping system can have the balanced state at different work gestures, so as to achieve the purpose of improving the optical element additional surface shape caused by force of gravity. The clamping system for realizing the method includes a base, the support strip, a baffle plate, the pressure strip, the optical element, as well as an external wrench and a heavy-calibre interferometer. The method and the clamping system provided by the invention can improve the additional surface shape of the heavy-calibre ultrathin transmission-type optical element caused by force of gravity.

The invention discloses a method for automatically converting data between dynamics analysis software and finite element analysis software, comprising the following steps of: starting the finite element analysis software to perform model flexiblization and outputting a modal neutral file (MNF); starting the dynamics analysis software, loading a virtual prototype model, reading the MNF, performing kinematics and dynamics analysis and outputting a load file; applying a load in the load file to a flexible body, performing stress and strain analysis on the flexible body and outputting stress and strain data; and circularly performing the steps and outputting an optimal operating condition and the stress and strain data. The method for automatically converting data can really integrate the powerful finite element function of the finite element analysis software and the powerful dynamics analysis function of the dynamics analysis software for combined application and provide an automatic, simple, convenient, high-efficiency and reliable realization means for achieving the mechanical property analysis and the operating condition analysis of a mechanical system.

The invention discloses a method for calculating and analyzing the contribution of each vibration excitation system during vehicle operation. The method comprises the following steps of (S1) performing finite element modeling on a complete vehicle and performing modal simulation calculation, (S2) obtaining the information of a vehicle vibration excitation system through a test, (S3) importing dataobtained in the step (S2) into finite element analysis software, (S4) solving and calculating frequency response functions under the combined action of three directions of each vibration excitation system, the single action of the three directions of each vibration excitation system and the combined action of three directions of all vibration excitation systems, (S5) exporting data calculated bythe finite element analysis software and importing the data into numerical calculation software, and (S6) calculating the contribution of each vibration excitation system at a problem point and the contribution of each direction of each vibration excitation system during a vehicle running process. A contribution result obtained by the calculation and analysis method is accurate, and a reliable basis can be provided for the improved design of the vehicle.

A computational model of the human vaginal environment is disclosed. The model comprises finite element analysis software, segmented tissue regions, at least one defined material parameter for each of said segmented tissue regions, and at least one boundary condition for each of said segmented tissue regions. At least one of the boundary conditions is subject to physiological condition changes and the model comprises computing means for manipulating the material parameters and the boundary conditions with the finite element analysis software.

A method for predicting seismic safety for extremely large engineering project includes using finite element (FE) preprocessing software to set up FE module, inputting parameters required by active time histories of seism for obtaining mathematical module, transmitting the model and time step length to supercomputer to carry out transient response analysis and model analysis for parallel calculation, sending data back to FE analysis software for following calculation and carry out visual processing by using FE post processing software to read in calculation result .

The invention relates to a finite element model correction method based on sensitivity analysis. According to the method, solid modeling is performed on an assembly in three-dimensional software, a modal test is performed on an assembly model through a modal test system, an assembly finite element simulation model is established by the adoption of pre-processing software and post-processing software, modal analysis solving is performed through finite element analysis software, correlation checking is performed on a modal test result and a modal simulation analysis result through LMS.VirtualLabsimulation analysis software, modal sensitivity analysis is performed, parametric variables sensitive to modal frequency are found out, and finite element model fundamental frequency is matched withmodal test fundamental frequency through optimization iteration. Compared with a physical test, the simulation analysis technology has many advantages such as low cost and a short cycle; and within asimulation result error allowed range, the simulation analysis result can serve as a reference basis for vibration characteristic analysis, so that the method has important reference value for relevant test work.

The invention discloses a method for modeling a multi-scale finite element model of a node of a steel framework structure, and the method comprises the following steps of: 1) adopting an one-dimensional beam unit to establish a steel framework structure calculating model by a finite element analysis software, selecting a key beam column node, and intercepting a beam unit which is jointed on the key beam column node; 2) connecting the beam unit with a plate shell unit through coupling six-directional freedom degrees of all nodes in a contact surface; and 3) adopting free mesh division of the finite element software; controlling quality of meshes by a mesh quantity, a side length and a curvature; setting mesh size as (5-10)mm depending on size of a plate; applying a load on a two-dimensional plate unit in a form of a node concentrative load, thereby obtaining a multi-scale finite element model of the node of the steel framework structure. The method not only ensures calculating precision, but also reduces a calculating expense to the greatest extent.

The invention relates to a zero resistance insulator detection method on the basis of a finite element database, which comprises the following steps of: by utilizing finite element analysis software, establishing a model database of a typical power transmission line tower and a corresponding insulator string; and carrying out electric field analysis on an insulator string model in the model database by the finite element analysis software, adopting a non-contact electric field test method when carrying out field testing on a zero resistance insulator, comparing a field test result with a finite element calculating result and effectively identifying whether the zero resistance insulator exists in the line insulator string and a specific position thereof. According to the invention, the zero resistance insulator detection method is on the basis of the finite element emulation calculation; the electric field distribution conditions of various towers and insulator strings can be mastered; part of test work is replaced with calculation; and the workload is lower. Meanwhile, the non-contact electric field test method can be used as the zero resistance insulator detection method; the specific position of the zero resistance insulator can be identified; and the zero resistance insulator detection method has the advantages that workers do not need to climb the tower to work, power does not need to be switched off to carry out detection, the zero resistance insulator detection method is safe and reliable and the like.

The invention belongs to the field of power system simulation and particularly relates to a method for simulating a three-dimensional electric field on a valve side of a converter transformer. For an existing situation that the researches on the electric field of the converter transformer most focus on two-dimensional electric field modeling analysis and rarely focus on three-dimensional modeling analysis, the invention takes the building of a three-dimensional model of major insulation of the converter transformer as a core and proposes a method for simulating a direct-current electric field of a valve side winding of the converter transformer by considering the nonlinearity and anisotropy of a material. The method comprises the steps of firstly, building the three-dimensional model of the end part of the winding of the converter transformer by utilizing finite element analysis software ANSYS, and performing grid division on the three-dimensional model; secondly, writing a nonlinear anisotropic direct-current electric field computing program by utilizing a secondary development APDL module of ANSYS; and finally, setting a boundary condition, initial resistivity and a loading test voltage, and computing the three-dimensional electric field. According to the method for simulating the three-dimensional electric field on the valve side of the converter transformer by considering the nonlinearity and anisotropy, provided by the invention, a method is provided for improving the precision of simulating the electric field of the converter transformer.

The invention discloses a steel-aluminum laser welding technique optimizing method. The steel-aluminum laser welding process is simulated through finite element analysis software SYSWELD, and a steel-aluminum dissimilar metal laser welding temperature field distribution cloud picture, the weld penetration depth and the weld width are obtained. The mapping relation between laser technique parameters and the weld penetration depths and the weld widths is built through the Taguchi experiment and a response surface method, accordingly, the weld penetration depths and the weld widths under the different technique parameters are predicted, the ideal weld penetration depth is obtained under the condition that the good weld formability is comprehensively considered, and thus the optimal laser welding technique parameters are obtained. The steel-aluminum laser welding technique optimizing method is applied to selecting of the steel-aluminum laser welding technique parameters, the difficulty that the steel-aluminum laser welding technique parameters have to be selected by means of rich experience of workers and a large number of experiments is overcome, thus, the large quantity of time and consumed materials are saved, selection of the technical parameters is easier and more reliable, the production efficiency is improved, and the production cost is saved.

The invention discloses an abrasion destroy failure quantitative prediction method, based on flow-solid couple analysis, comprising abrasion product protective film character analysis and failure prediction analysis under flow function. Based on the real condition of tube, via flow mechanics similar theory, the invention finds the standard, test condition and flow medium of object tube, via electrochemical test method, processes instant character test of abrasion destroy, builds flow-solid couple model to set characteristic parameter values of abrasion product protective film, uses finite element analysis software to process flow-solid couple simulation, combined with test, corrects the characteristic parameter values of the abrasion product protective film, based on real tube system typical tube, processes flow-solid couple simulation, to realize abrasion destroy failure quantitative prediction of tube system, which can accurately predict the failure points of whole tube system, to support the safe protection technique of pressure tube system.

The invention provides a finite element analysis method for thermal-coupled vibration characteristics of an impeller structure. The technical scheme is that the finite element analysis method comprises the following steps: establishing a three-dimensional model of the impeller structure by utilizing a solidworks parameter modelling method; importing the three-dimensional model of the impeller structure into finite element analysis software ANSYS, setting the attributes, parameters, loads and constraints of materials according to the actual working conditions in an ANSYS software pre-processing module, and dividing finite element grids; calculating the first five orders of fixed frequencies of the impeller structure at different rotation speeds through an ANSYS software modal analysis module; calculating the first five orders of fixed frequencies of the impeller structure at different rotation speeds in high-temperature environment through considering the influences of a temperature field; comparing the fixed frequencies in above analysis to obtain the influences, caused by the temperature field, on the vibration characteristics of the impeller structure, so as to provide theoretical basis for the failure mechanism research of the impeller structure under the high-temperature environment.

The invention discloses a method for automatically converting data among kinetic analysis, three-dimensional modeling and finite-element analysis software, which comprises the steps of: starting mechanical system kinetic analysis software, and loading a virtual prototype to carry out kinematics and dynamics simulation; generating a CMD command file recognized by the mechanical system kinetic analysis software in the three-dimensional modeling software by using relevant plug-ins; deriving a mode neutral file corresponding to a model in the finite-element analysis software; reading the generated CDM command file and the mode neutral file by using the mechanical system kinetic analysis software and carrying out rigid-flexible mixed simulation; circularly correcting and flexing the model, and displaying a better result on screen and storing data files. The method for automatically converting the data is applied to complex mechanical system design and analysis, which can improve the design accuracy and the design efficiency of products.

A computing method for hub ultimate strength of a wind turbine generator system belongs to the technical field of wind power generation, and comprises the following steps: modeling by adopting software of finite element analysis, performing finite element mesh generation, setting constraint conditions and computing to obtain a deformation and stress cloud chart. The modeling process is as follows: 1, drawing a 3D model for a hub, importing the 3D model into a finite element software platform, and drawing a 3D entity model for the connection part of blades and the hub and the connection part of a main shaft and the hub in the finite element software; 2, setting material attributes for the blades, the main shaft and the hub, establishing a finite element model thereof, rigidly coupling the blades, the main shaft and the hub, and determining an overall coordinate system of the hub; 3, establishing nodes at root parts of the hub and each blade, converting the nodes into a blade root coordinate system specified by Germanischer Lloyd, then rigidly coupling the nodes to the blades, so that the load can be transmitted to the hub through the blades. The computing method facilitates accurate computation of strength performance of the hub, saves the computing time and improves the computing efficiency.