客车空气弹簧悬架边界条件模拟与试验验证  

Simulation and test verification on boundary condition of bus air spring suspension

作　　者：赵文涛 任旭东[1] 温雯[1] 

机构地区：[1]中国工程物理研究院总体工程研究所,四川绵阳621900

出　　处：《计算机辅助工程》2018年第1期1-6,共6页Computer Aided Engineering

摘　　要：针对客车车架强度分析时空气弹簧悬架边界条件难以设置的问题,提出使用等效静态载荷法进行悬架模拟的思路。分析空气弹簧刚度的非线性和双横臂独立悬架的机构模型,建立整车多体动力学模型,计算多工况下车架与空气弹簧悬架连接位置处的受力,求解得到等效静态载荷并施加到有限元模型中,添加辅助约束完成边界条件设置;对车架进行多工况下的强度分析,比较不同工况下车架的应力分布和最大应力出现的位置。搭建试制样机的动态测试平台,对比仿真结果与试验结果,验证模拟方法的有效性。As to the issue that the boundary condition of air spring suspension is difficult to set for the strength analysis of bus frame,an equivalent static load method is proposed. The nonlinearity of the air spring stiffness and the mechanism model of the double wishbone independent suspension are analyzed.The multi-body dynamic model of the whole vehicle is built. The forces at the connecting position of the bus frame and the air spring suspension under different conditions are calculated. The equivalent static load is obtained and applied to the finite element model. The auxiliary constraints are added to the model to complete the setting of boundary conditions. The strength analysis of the bus frame under multi conditions is carried out. The stress distribution and the positions of maximum stress on the frame are compared. A dynamic test platform for the prototype is built. The simulation results are compared with the experimental results. The simulation method is verified to be effective.

关 键 词：等效静态载荷 空气弹簧悬架 边界条件 多工况 强度分析 动态测试 

分 类 号：TB391.9[一般工业技术—材料科学与工程]