高速履带车辆履带销轴橡胶衬套连接力学性能研究

Study on mechanical properties of rubber bushings for track pins of high-speed tracked vehicle

针对橡胶衬套材料超弹性特性行为,设计单轴拉伸实验,获得反应销轴橡胶衬套材料的力学属性数据;选择四种常用于描述橡胶材料超弹性的本构模型,基于ABAQUS得到3阶Ogden本构模型拟合效果最优;设计橡胶衬套压缩实验与仿真压缩实验,检验了本构模型的合理性;建立连接结构中带有销轴和橡胶衬套的2个履带板连接有限元模型,结合橡胶衬套实际安装特点,对橡胶衬套有限元模型径向预压缩后,完成履带板拉伸和扭转仿真计算,对仿真数据进行处理,获得橡胶衬套力学性能。通过实验与仿真相结合的方式对预压缩后履带销轴橡胶衬套连接的力学性能进行了研究,得到橡胶衬套拉伸刚度50000 N/m、扭转刚度18600 N·mm/(°),为高速履带车辆行走系统动力学性能研究奠定基础。

For the hyperelastic behavior of rubber bushing material,uniaxial tensile experiment is designed to obtain the mechanical property data of rubber bushing material.Four kinds of intrinsic models commonly used to describe the hyperelasticity of rubber material are selected,and the best fitting effect of the 3rd-order Ogden principal model is obtained based on ABAQUS.Designed rubber bushing compression experiments and simulated compression experiments to test the reasonableness of the intrinsic model.The finite element model of two track shoes connections with pin and rubber bushing in the connection structure is established.Combined with the actual installation characteristics of rubber bushings,the rubber bushings finite element model is radial pre-compressed.Then,the tensile and torsion simulation of the track plate is completed.The simulation data are processed to obtain the mechanical properties of the rubber bushings.The mechanical properties of track pin rubber bushing joint after pre-compression were investigated by a combination of experiment and simulation.The rubber bushing tensile stiffness 50000 N/m and torsional stiffness 18600 N·mm/(°).The results of the study lay the foundation for the study of the dynamic performance of the travelling system of high-speed tracked vehicles.