基于惯性释放与子模型法的新能源车架强度分析  

Strength Analysis of New Energy Vehicle Frame Based on the Method of Inertia Release and Submodel

作　　者：沈保山 姜涛 陆永能[2,3] 员征文 

机构地区：[1]徐州徐工汽车制造有限公司,江苏徐州221004 [2]徐工集团江苏徐州工程机械研究院,江苏徐州221004 [3]徐工集团高端工程机械智能制造国家重点实验室,江苏徐州221004

出　　处：《汽车零部件》2017年第10期1-5,共5页Automobile Parts

基　　金：国家科技支撑计划(2015BAF07B02)

摘　　要：为提高车架结构强度分析精度,考虑地面纵向、横向摩擦力与轮荷的关系,基于多体动力学联合有限元法,建立刚柔耦合的整车数字样机模型,并提取各承载工况下连接点处的载荷;利用惯性释放与子模型相结合的方法,进行车架静力分析,避免边界条件约束反力对分析结果的影响,解决了惯性释放法无法计算接触非线性模型的问题。试验结果表明:利用多体动力学与有限元、惯性释放与子模型相结合的车架强度分析方法,可获得精度更高的结果。To improve the accuracy of structural strength analysis results of frame,a rigid-flexible coupling digital model of whole vehicle was established,considering the relationship between longitudinal and lateral friction forces of the ground and wheel loads,and the load at every connection point of each load condition was extracted. In order to avoid the influence of external conditions on the finite element analysis results,inertia relief method and submodel method were applied to calculate the stress of frame. Furthermore,the problem that the inertial release method could not be used to calculate the contact nonlinear model could be solved. The experimental results show that more accurate strength results of frame can be obtained with the methods of multi-body dynamics and finite element,inertial release and submodel.

关 键 词：车架 强度 应力 刚柔耦合 惯性释放 子模型 

分 类 号：U463.32[机械工程—车辆工程]