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Component model order reduction method facing products grade simulated components

A technology of model reduction and components, which is applied in the field of computer-aided collaborative product simulation, can solve the problems of large number of components and high difficulty, and achieve the effect of improving reusability, increasing simulation speed, and shortening product development cycle

Inactive Publication Date: 2009-12-16
TSINGHUA UNIV
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AI Technical Summary

Problems solved by technology

However, due to the large number of parts and mutual constraints that make up the whole product, product-level simulation is difficult to implement

Method used

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  • Component model order reduction method facing products grade simulated components
  • Component model order reduction method facing products grade simulated components
  • Component model order reduction method facing products grade simulated components

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] The simulation method is a model reduction method for component structures, which includes the following three modules, such as figure 1 As shown, they are:

[0029] 1. Component Modeling Module

[0030] This module is mainly to establish the 3D mesh model of the parts, and provide the basic model for other modules to complete detailed simulation, order reduction and other calculations. The steps involved are as follows:

[0031] Step 1.1 establishes the three-dimensional solid model of the component. According to the actual size and material of the parts, through input devices such as mouse and keyboard, use ANSYS software to manually build its model, and the established 3D model is saved in model.sat format.

[0032] Step 1.2 meshes the component model. In ANSYS software, for the 3D solid modeling of parts established in step 1.1, the 3D model is divided into tetrahedral meshes by mouse, keyboard and other input devices in the order from line to surface and from su...

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Abstract

The invention relates to a component model order reduction method facing to product level simulation, and belongs to the CAD computer aided cooperative product simulation technology field, which is characterized in comprising following steps: using ANSYS software to establish a three-dimensional mesh module of the component and calculate modal, and extracting mass matrix and stiffness matrix of the component model; then using Mathematica software and combining an order-reduction algorithm in a finite element analysis to reduce the component model provided with n-dimensional vector into the component model consisted of m modals according to the gained the stiffness matrix and mass matrix, and a state of the structure in a maximum deformation in a setting typical load and a state in system balance. The invention improves product level simulation speed of complex products, improves a reuse degree of simulation data, and is simply operated, and easy to realize.

Description

technical field [0001] The invention belongs to the technical field of computer-aided collaborative product simulation. Background technique [0002] Complex electromechanical products, such as machine tools, automobiles, robots, and aerospace vehicles, are usually a complex large system, including a large number of components or subsystems, involving multiple physical fields, and the performance of each part affects each other and is tightly coupled. . In the process of product design, design experts in many fields are needed to carry out design work according to the performance requirements of the product. In order to find problems in component design in the early stage of product design and reduce design changes, thereby reducing design costs and speeding up the design process, it is particularly important to introduce simulation technology in all aspects of the complex product design process. [0003] However, due to the tight coupling between the various parts of many...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50G06T17/40G06T19/20
Inventor 田凌薛莲范灿升
Owner TSINGHUA UNIV
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