39results about How to "Calculation results are accurate and reasonable" patented technology

The invention discloses an evaluation method for the power transmission capacity of a multi-channel AC / DC hybrid cross-section and its constraint conditions. Firstly, the AC-DC power flow transfer ratio matrix D of the hybrid cross-section and the load rate matrix η of the AC line are calculated, and then according to the matrix D Calculate the line load rate matrix λ after the N-1 fault occurs on the AC line with the matrix η and the rated power of each AC line; judge whether the maximum element in the line load rate matrix λ is 1, and adjust the power flow of the AC section according to the judgment result, and then Calculate the power transmission capacity P of the AC section a ; Then calculate the transmission capacity P of the flexible DC section d ;Finally, according to the transmission capacity P of the AC section a and the power transmission capacity P of the flexible DC section d Determine the power transmission capacity and constraints of the hybrid section. The invention can realize the rapid evaluation of the power transmission capacity and constraint conditions of the multi-channel AC-DC hybrid cross-section with flexible direct current, has short calculation time, high calculation efficiency and relatively accurate and reasonable calculation results.

The invention discloses a lock head construction emulation method considering soft foundation consolidation and concrete creep. The lock head construction emulation method comprises the steps of: 1, determining thermal parameters of concrete and a soft foundation, a creep calculation parameter of the concrete, a consolidation parameter of the foundation and an elastoplasticity mechanical parameter of the foundation; 2, establishing a finite element network of a lock head structure; 3, determining time steps of calculation, an initial temperature of the concrete and an equivalent heat emission coefficient of a concrete heat insulating measure; 4, according to the thermal parameters, a time-history analysis step, an initial condition and an air temperature, predicting and calculating a temperature field; 5, calculating a pore pressure and ground stress distribution of the excavated soft foundation; and 6, applying a temperature load, a foundation initial pore pressure, a ground stress of the foundation and other loads which need to be considered to carry out stress calculation. The method disclosed by the invention comprehensively considers a creep feature of the concrete and an elastoplasticity consolidation feature of the soft foundation, and can relatively perfectly predict a stress of the lock head structure in the construction period.

The invention relates to an indeterminate harmonic flow calculation method applicable to distributive power supply access. The method concretely comprises the following steps of firstly, for a distributive power supply with the fluctuation on the output power, performing modeling on the basis of a measuring sample by using the output power of a reverse cloud model generator on a gird integration node; then, solving the power prediction range of the DG gird integration node according to the 3 Delta range of a positive cloud model; then, on the basis of the obtained power range, performing indeterminate harmonic flow calculation by combining a boundary flow method; solving the power grid harmonic flow distribution; finally, judging whether the harmonic content of each node of the power grid is in a safe range or not according to the node voltage total harmonic distortion factor result. The method provided by the invention has the advantages that better inclusivity is realized on the fluctuation data; in addition, under the condition of the same operation goal and conditions, the calculation efficiency of the provided calculation method is much higher than that of a Monte Carlo method; the calculation efficiency is identical to the calculation efficiency of a probability flow method.

The invention provides a resonant reflection calculation method, device and electronic equipment for multi-row submerged embankments. The present invention first numerically solves the hydrodynamic characteristic parameters of a single row of porous submerged embankments, and then recursively calculates multiple rows of porous submerged embankments by using wide spacing assumptions The optimal design parameters of the multi-row submerged embankment are given. The invention has the advantages of high calculation efficiency, not limited by the influence of the shape of the submerged embankment, and can provide important reference suggestions for the engineering design of the multi-row submerged embankment.

The invention discloses a vehicle speed guiding method. According to the vehicle speed guiding method, according to the change of traveling states of a target vehicle in different detecting areas, theinfluence of adjacent vehicles on the target vehicle is calculated in real time, and it is ensured that the vehicle can travel more reasonably and safely under the influence of the surrounding vehicles; and the traveling conditions of the surrounding vehicles are comprehensively applied, so that the calculating result is more accurate and more reasonable, high real-time performance is achieved, meanwhile, the driving environment can also be adjusted more efficiently, and the passing rate of a road is increased.

The invention discloses a method for determining the axisymmetric dynamic response of a two-dimensional rock-socketed pile in saturated soil. First, based on the Hamiltonian dynamic principle, a motion equation of a two-dimensional elastic pile considering radial deformation is established and solved, and the equation containing unknown constants is obtained. Homogeneous solution of the displacement of the pile; then establish and solve the equation of motion of the soil based on the Boer porous medium theory, and obtain the general solution of the displacement and stress of the soil including the unknown constants; after uniformly determining the boundary conditions and continuity conditions of the pile-soil system, Based on the boundary conditions of the soil, the general solution of the displacement and stress of the soil with unknown constants, and the homogeneous solution of the displacement of the pile with unknown constants, the general solution of the pile foundation displacement with unknown constants is obtained; according to the boundary conditions of the pile foundation and The continuity condition between the pile and soil determines all the unknown constants in the general solution of the pile foundation displacement, obtains the fixed solution of the pile foundation displacement, and then obtains the frequency domain dynamic impedance and time domain velocity response of the pile top, and the obtained results are more reasonable and accurate.

The invention discloses a calculating method of calorie consumed by the bicycle riding. The calculating method is characterized in that the total weight of a bicycle and a rider, the stress area of the wind resistance received by the bicycle and the rider in the riding process and the resistance parameter of the bicycle are obtained through a parameter calibration method, then, the applying work of the bicycle riding in the unit time is calculated, and the work applied during the bicycle riding in unit time comprises the work applied for overcoming the wind resistance, the work applied for overcoming the gravity of the rider and the bicycle, the work applied for changing the kinetic energy of the rider and the bicycle and the work applied for overcoming the bicycle resistance, so the calorie consumed by the bicycle riding is calculated. The calculating method has the advantages that the calorie value consumed by human bodies can be calculated in real time according to different movement environments, and the calculating result is more accurate and reliable.

The present application discloses a wind-vehicle-bridge full dynamic coupling analysis method and system, the method includes: constructing a vehicle-bridge coupling vibration analysis module including driver behavior; using FLUENT to calculate the aerodynamic force on the vehicle and bridge at the current moment The results are transferred to the vehicle-bridge coupled vibration analysis module; through the vehicle-bridge coupled vibration analysis module, aerodynamic simulation and vibration analysis are performed on the aerodynamic results, and the vehicle motion state and trajectory under the joint action of the crosswind and the driver are obtained and fed back to the In FLUENT; based on the feedback results, use FLUENT to calculate the aerodynamic results on the vehicle and bridge at the next moment and transmit them to the vehicle-bridge coupling vibration analysis module, and so on until the calculation is completed. In this way, the two-way interactive calculation of vehicle aerodynamic force and real-time update of vehicle status is realized, and then the full dynamic coupling calculation of wind-vehicle-bridge is realized, and the calculation results are more reasonable and accurate.