基于MATLAB矢量化物质点法的车身防撞梁碰撞分析  

Collision analysis of vehicle body anti-collision beam based on MATLAB vectorized material point method

作　　者：王长生[1] 刘占炜 侯文彬[1] WANG Changsheng;LIU Zhanwei;HOU Wenbin(School of Automotive Engineering,Dalian University of Technology,Dalian 116024,Liaoning,China)

机构地区：[1]大连理工大学汽车工程学院,辽宁大连116024

出　　处：《计算机辅助工程》2024年第1期28-36,共9页Computer Aided Engineering

基　　金：国家重点研发计划(2021YFB3300603);中央高校基本科研业务费(DUT22YG232)。

摘　　要：基于MATLAB矢量化的物质点法(material point method,MPM)框架,分析车身前防撞梁的碰撞冲击问题。MPM在每一迭代步将物理参数在物质点和背景网格间相互映射,使用MATLAB矢量化框架可以使用户在快速入门的同时保证求解效率,其应力更新采用车身结构材料的弹塑性本构模型。前防撞梁碰撞冲击数值算例结果表明,MPM可以保证求解精度,同时矢量化技术可以大幅提高求解效率。Based on MATLAB vectorization Material Point Method(MPM)framework,the collision and impact issues of the front anti-collision beam of the vehicle body is analyzed.MPM maps physical parameters to each other between material points and background grids at each iteration step.MATLAB vectorization framework allows users to quickly get started while ensuring solution efficiency,and the elastic-plastic constitutive model of the vehicle body structural material is selected to update the stress.The numerical calculation results of the collision impact of the front anti-collision beam indicate that MPM can ensure the solution accuracy,and the vectorization technology can greatly improve the solution efficiency.

关 键 词：物质点法(MPM) 矢量化 车身 碰撞 前防撞梁 MATLAB 

分 类 号：U463.326[机械工程—车辆工程] TB115.1[交通运输工程—载运工具运用工程]