摘要
应用多体系统动力学方法及动态显式有限元方法的混合方法 ,建立了碰撞过程中乘员冲击响应分析的有限元模型 :采用四节点壳单元及刚体材料模型 ,接触搜寻采用一体化算法 ,接触力由罚参数法确定 ,接触界面的摩擦力由经典摩擦定律计算。仿真分析与台车试验结果的对比表明 :应用多体系统动力学方程及显式时间积分格式 ,可以准确地计算出汽车碰撞过程中乘员的冲击响应。分析了五种减速度波形及五种典型结构的力—变形特性对乘员冲击响应的影响 。
A mixture procedure of dynamic explicit FEM and multi body system kinetics is used to analyse the impact responses of occupant during vehicle crash.A finite element model of occupant is created using 4 nodes shell elements and the rigid material model.The single surface contact algorithm is taken to deal with the contact searching.The penalty method for the evaluation of contact force is used.The classical coulomb law of friction is employed to evaluate the friction force.It has been verified that the relations between kinematics and dynamics of occupant during crash can be simulated accurately by comparing the simulated results with that of sled crash test.In this mixture procedure,the movement equation of occupant is created using the multi body system kinetics method.The explicit time integration formulation is used to cope with the time integration.Analysis for the effect of five different deceleration curve and five typical mechanics properties of thin wall structure on occupant impact response are also discussed.The validity of the design idea of pre deformation controlling structures and the favorable crash characteristics of laterally loaded metallic braced bubular clusters are verified.
出处
《中国公路学报》
EI
CAS
CSCD
北大核心
2001年第2期115-119,共5页
China Journal of Highway and Transport
基金
2 0 0 0年度交通部优秀青年专业技术人才专项经费资助项目 (95 -0 6 -0 2 -13)
