一种适用于汽车复杂结构的整车电磁兼容模型建立方法

Complete vehicle electromagnetic compatibility (EMC) model building method applicable to complex automobile structure

Abstract

本发明提处一种适用于汽车复杂结构的整车电磁兼容模型建立方法,采用基于HyperMesh和Matlab软件平台的整车CATIA模型简化和EMC网格模型重构技术,其技术方案为:首先,利用有限元软件HyperMesh对复杂车体各关键部分的CATIA模型进行简化和网格剖分。然后,开发Matlab程序提取剖分后的节点坐标数据。最后,在Matlab中编写形成网格模型的VBS程序,重构成电磁仿真软件可以处理的整车EMC模型。本方法可以初步解决整车EMC精细模型与计算机内存需求和计算时间之间的矛盾,为汽车开发过程中快速高效的获取所需精度的整车EMC模型提供一种行之有效的途径。
The invention provides a complete vehicle electromagnetic compatibility (EMC) model building method applicable to a complex automobile structure. The method is characterized in that a HyperMesh and Matlab software platform based complete vehicle CATIA (Computer-graphics Aided Three-dimensional Interactive Application) model simplifying and EMC grid model rebuilding technologies are carried out. According to the technical scheme, the method comprises the steps of simplifying and dividing the CATIA model of each key part of a complex automobile body by grids through finite-element software HyperMesh; then developing Matlab program to extract the coordinate data of the divided nodes; finally writing a VBS program for forming the grid model in the Matlab, so as to rebuild a complete vehicle EMC model which can be handled by the electromagnetic simulation software. With the adoption of the method, the conflict between the complete vehicle EMC fine model and the demand on an internal memory of a computer and the calculation time can be initially solved, and thus a feasible way is provided for quickly and efficiently acquiring the complete vehicle EMC model with the precision meeting the demand during developing an automobile.

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