摘要
为提高新能源车车架强度分析精度,在考虑了地面摩擦力与轮荷关系的前提下,基于多体动力学联合有限元分析方法建立了刚柔耦合整车数字样机及虚拟台架试验模型,对整车在多工况下的运动状态进行了模拟,并提取了各承载工况下车架连接点处的载荷。以所提取载荷作为车架边界载荷输入,利用惯性释放法对车架进行了强度分析,并根据分析结果对高应力区域结构进行优化设计及试验验证。结果表明,惯性释放法能有效避免边界条件对分析结果造成的影响,可得到较合理且符合实际的车架应力分布状态。
To improve the accuracy of structural strength analysis results of new energy vehicle frame,based on simulation analysis of multi-body dynamics combined with finite element method,a rigid-flexible coupling digital vehicle prototype and a virtual bench test model were established,considering the relationship between friction forces of the ground and wheel loads,the motion state of the vehicle under multiple road conditions was simulated,and the loads at connection points of the frame under each load condition was extracted.Inertia relief method was applied to analyze frame strength using the load extracted above as frame boundary load input,the structure of the high-stress region was optimized and the simulation results were verified by experiments according to the results of the strength analysis.The experimental results show that using the inertial relief method can avoid the influence of boundary conditions on the finite element analysis results,rational and realistic frame stress distribution state can be obtained.
作者
孙辉
沈保山
王新超
陆永能
员征文
Sun Hui;Shen Baoshan;Wang Xinchao;Lu Yongneng;Yun Zhengwen(Xuzhou XCMG Automobile Manufacturing Co.,Ltd,Xuzhou 221004;Jiangsu Xuzhou Construction MachineryResearch Institute,XCMG,Xuzhou 221004;State Key Laboratory of Intelligent Manufacturing of Advanced ConstructionMachinery,XCMG,Xuzhou 221004)
出处
《汽车技术》
CSCD
北大核心
2018年第12期55-58,共4页
Automobile Technology
基金
国家科技支撑计划项目(2015BAF07B02)
关键词
车架
多体动力学
惯性释放
结构优化
Vehicle frame
Multi-body dynamics
Inertia relief
Structure optimization
