机械弹性车轮纯外倾力学特性刷子理论建模

Brush theory modeling of pure camber performance of mechanical elastic wheel

为研究机械弹性车轮的外倾特性,本文对机械弹性车轮的结构特征及承载特性进行分析,建立了不考虑0轮弹性的机械弹性车轮外倾力学特性刷子理论模型。推导出纯外倾时车轮的侧向力、回正力矩及翻转力矩表达式。利用ABAQUS建立包含橡胶材料超弹性及接触大变形等非线性特征的机械弹性车轮三维有限元模型,并通过垂向加载试验验证了仿真模型的可靠性。对机械弹性车轮外倾特性的仿真值、理论值进行对比分析,结果表明所建立的机械弹性车轮外倾特性刷子模型具有良好的精度。该研究为机械弹性车轮外倾纵滑及外倾侧偏等复合工况的力学特性建模提供了理论指导。

To study the camber performance of the mechanical elastic wheel,in this paper,we analyzed the wheel suspension structure and bearing characteristics and established a brush theory model for the pure camber mechanical properties of mechanical elastic wheel based on the hypothesis that the tire body is rigid.The functions of the lateral force,aligning moment and overturning moments in the pure camber condition were deduced.A three-dimensional finite element model(FEM)of the mechanical elastic wheel,which contains nonlinearities such as the hyperelastic characteristics of rubber and large contact deformation,was established by ABAQUS.And the reliability of the simulation model was validated by the vertical loading test.By comparing and analyzing the simulation results and the theoretical values of camber performance,it indicates that the camber brush model of the mechanical elastic wheel has good accuracy.These research results provide theoretical guidance for modeling the mechanical characteristic of the mechanical elastic wheel under the combined conditions of camber,longitudinal slip,and sideslip.