基于hypermesh的乘用车车门性能分析及结构优化

Performance analysis and structure optimization of passenger car door based on HyperMesh.

首先将三维建模软件CATIA建立的某乘用车车门的几何模型导入到有限元前处理软件Hypermesh中，建立其有限元模型，结合nastran后处理软件模拟仿真分析车门的下垂刚度、扭转刚度以及低阶模态值。针对整体等厚度式车门内板性能过剩的问题提出了一种分离式不等厚度的车门内板结构优化方案，在保证其力学性能和低阶模态值满足设计要求的前提下，将车门总质量减小5．29％。

Firstly, the car door geometry model established by the 3D modeling software CATIA is imported into the finite element pre-proeessing software HyperMesh to establish finite element model, combined with the NASTRAN post-processing software simulation simulation analysis of door sagging stiffness, torsion stiffness and low order modal value. In view of the problem of excess performance of the integral thickness type door inner panel, a new method for the optimization of the structure of the vehicle door with different thickness is presented, under the premise of ensuring the mechanical properties and the low order mode value to meet the design requirements, the total quality of the car door will be reduced by 5.29%.