一种新型免充气车轮的非线性有限元分析

Non-linear finite-element analysis on a new non-pneumatic wheel

文中介绍了一种新型免充气车轮的结构与原理,并基于车轮与材料的非线性特性建立了车轮的非线性有限元模型。建模时充分考虑了车轮聚氨酯材料与橡胶材料的超弹性,聚氨酯材料采用Yeoh本构模型,橡胶材料采用Mooney-Rivlin本构模型。分析了下沉量对车轮接地位置1、位置2处的接地性态的影响,具体包括接地印迹、法向应力分布与最大法向应力值。接地位置1、位置2的力学差异是车轮稳态滚动中产生振动的原因,并通过稳态滚动仿真得到了验证。

In this article,efforts are made to introduce the new non-pneumatic wheel’s structure and principle;its non-linear finite-element model is set up based on the non-linear characteristics of the wheel and the material.The super-elasticity of the wheel’s polyurethane and rubber materials is fully considered for modeling.The polyurethane material adopts the Yeoh constitutive model,and the rubber material adopts the Mooney-Rivlin constitutive model.The analysis is conduced on the influence of the subsidence amount on the grounding behavior of the wheel grounding positions 1 and 2,including grounding footprint,normalstress distribution and maximum normal-stress value.The mechanical difference between the grounding positions 1 and 2 is responsible for vibration in the wheel’s steady-state rolling,which is verified by the simulation of steady-state rolling.