基于非线性有限元的某车辆板簧系统失效分析  

Failure Analysis of Leaf Spring System of a Vehicle Based on Nonlinear Finite Element Method

作　　者：程瑞鹏 刘丹 杨雕[3] 郭旻[3] 李佳兴 CHENG Ruipeng;LIU Dan;YANG Diao;GUO Min;LI Jiaxing(Shaanxi Institute of Technology,Xi′an 710300,Shaanxi,China;Inner Mongolia First Machinear Group Co.,Ltd.,Baotou 014033,Inner Mongolia,China;Northwest Institute of Mechanical&Electrical Engineering,Xianyang 712099,Shaanxi,China)

机构地区：[1]陕西国防工业职业技术学院,陕西西安710300 [2]内蒙古第一机械集团有限公司,内蒙古包头014033 [3]西北机电工程研究所,陕西咸阳712099

出　　处：《火炮发射与控制学报》2022年第6期37-41,63,共6页Journal of Gun Launch & Control

摘　　要：某轮式装甲车辆板簧系统在实际工况下经常出现裂纹、断裂等失效情况,从而影响车辆整体可靠性。板簧系统结构复杂、实际受载工况恶劣,属于典型的高度非线性问题。基于板簧材料力学性能试验、非线性有限元方法,建立板簧系统非线性有限元模型,综合考虑板簧系统真实受载过程,采用动静态耦合的方法解决了模型计算难以收敛的问题,获得了板簧系统工作过程应力分布状态,通过试验测试,验证了仿真模型的精度。计算结果表明,板簧应变计算与实测值最大误差为8.7%,板簧应力最大区域与实际裂纹及断裂位置相同;应力最大区域应力值超过材料屈服极限,产生塑性变形,是该板簧失效的主要原因。通过计算可为板簧的后续改进提供支撑依据。Cracks and fractures often occur in the leaf spring system of a wheeled armored vehicle, which affect the reliability of the vehicle as a whole. Due to the complex structure of the leaf spring system and the bad actual working conditions, it is a typical highly nonlinear problem. Based on the mechanical properties test of the leaf spring material and the nonlinear finite element method, the nonlinear finite element model of the leaf spring system is established, and the real loading process of the plate spring system is considered comprehensively. The problem that the model calculation is difficult to converge is solved by static-dynamic coupling, and the stress distribution state in the working process of the leaf spring system is obtained. The accuracy of the simulation model is verified by tests. The calculation results show that the maximum error between the calculated spring strain and the mea-sured value is 8.7%, and the maximum stress region of the spring is the same as the actual crack and fracture position. The stress value in the maximum stress region exceeds the yield limit of the material, resulting in plastic deformation, which is the main reason for the spring failure. The calculation can provide support for subsequent improvement of leaf springs.

关 键 词：板簧 预紧 裂纹 应变测试 

分 类 号：TJ812[兵器科学与技术—武器系统与运用工程]