载荷与径向刚度对机械弹性车轮包容特性的影响

发布时间：2019-02-22 18:09

【摘要】：为解决机械弹性车轮在不平路面的冲击振动传递问题,提高车辆行驶平顺性能,该文基于弹性滚子接触模型、有限元分析及试验测试方法对车轮的包容特性及影响因素进行了研究。通过对车轮有效路形的分析,揭示了负荷和径向刚度对车轮包容特性的影响规律,并验证了所建模型的可靠性,结果表明:在车轮径向刚度一定的条件下,有效路形幅值随负荷的增加而减小,但有效路形扰动长度随负荷的增加而增大;在负荷一定的条件下,有效路形幅值随车轮径向刚度的增加而增大,扰动长度随之增加而降低。利用有限元模型和台架试验对车轮的低速稳态包容特性进行了分析,得出了车轮垂向动态力学响应随负荷和径向刚度变化的规律,在径向刚度一定的条件下,车轮垂向力响应随负荷的增加由抛物线形过渡到马鞍形,在负荷一定的条件下,车轮垂向力响应随径向刚度的增加而增大,分析结果反映了该车轮实际包容特性的客观规律性。该研究为机械弹性车轮结构优化及整车振动特性分析提供了参考。
[Abstract]:In order to solve the problem of shock vibration transmission of mechanical elastic wheels in uneven pavement and improve the ride comfort of vehicles, this paper is based on the elastic roller contact model. Finite element analysis and test methods are used to study the bearing characteristics and influencing factors of the wheel. Through the analysis of the effective road shape of the wheel, the influence of load and radial stiffness on the wheel containment characteristics is revealed, and the reliability of the established model is verified. The results show that: under the condition of certain radial stiffness of the wheel, The effective path amplitude decreases with the increase of load, but the effective path disturbance length increases with the increase of load. Under certain load conditions, the effective road amplitude increases with the increase of radial stiffness of the wheel, and the disturbance length increases and decreases with the increase of the radial stiffness of the wheel. By using finite element model and bench test, the low speed steady state containment characteristics of the wheel are analyzed, and the variation of the vertical dynamic mechanical response of the wheel with the load and radial stiffness is obtained. Under the condition of the same radial stiffness, the vertical dynamic mechanical response of the wheel is analyzed. The vertical force response of the wheel changes from parabola to saddle with the increase of load. Under the condition of certain load, the vertical force response of the wheel increases with the increase of radial stiffness. The results of analysis reflect the objective regularity of the actual containment characteristics of the wheel. The research provides a reference for the optimization of the mechanical elastic wheel structure and the analysis of the vibration characteristics of the whole vehicle.
【作者单位】：南京航空航天大学能源与动力学院;
【基金】：总装备部探索研究重大资助项目(NHA13002) 江苏省普通高校研究生科研创新计划资助项目(KYLX_0241)
【分类号】：U463.34

【参考文献】