【摘要】 为了预测和优化重型商用车V型推力杆的纵向刚度,通过橡胶试样单轴拉压试验建立V型推力杆中橡胶材料的超弹性本构模型,采用Abaqus软件对V型推力杆的工作过程进行有限元动态模拟。利用Abaqus软件的后处理模块预测V型推力杆的纵向刚度,并根据橡胶层的应变云图分析V型推力杆的纵向刚度与球铰结构之间的关系。分析结果表明,增大球铰塑料层的宽度可提高V型推力杆的纵向刚度,原因是这种结构改变了球铰橡胶层的体积及硫化面积,并阻碍橡胶层向两侧端盖的延展。对原结构及优化方案的样件进行台架试验。试验结果表明,提出的预测及优化方法是有效的,可缩短V型推力杆的开发周期,显著提高V型推力杆的纵向刚度。更多还原

【Abstract】 In order to forecast and optimize the longitudinal stiffness of the V-type thrust rod applied to heavy-duty commercial vehicles,the hyperelastic constitutive model of rubber material in the V-type thrust rod is built based on uniaxial tension and compression experiment for rubber specimens.Then the dynamic finite element simulation for the work process of the V-type thrust rods are carried out using Abaqus software.The longitudinal stiffness of the V-type thrust rods is predicted using the post processor module of Abaqus software.The relationship between the V-type thrust rod’s longitudinal stiffness and the structure of the spherical hinge is studied according to the strain contours of the rubber layer.The simulation results demonstrates that increasing the width of the plastic layer in the spherical hinge can improve the V-type thrust rod’s longitudinal stiffness,because this structure can change the volume and vulcanization area of the rubber layer and block rubber layer extend to end covers.Bench tests for the samples of the primarystructure and optimized structure are carried out,and the results show that the prediction and optimization method is valid.This method can shorten the R&D period of the V-type thrust rod and dramatically improve its longitudinal stiffness.更多还原