载荷与径向刚度对机械弹性车轮包容特性的影响  

Influences of loading and radial stiffness on mechanical elastic wheel enveloping characteristics

作　　者：王强[1] 赵又群[1] 付宏勋[1] 张彬彬[1] 

机构地区：[1]南京航空航天大学能源与动力学院,南京210016

出　　处：《农业工程学报》2016年第13期36-42,共7页Transactions of the Chinese Society of Agricultural Engineering

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)

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。To change the situation of the existing tire, developing run-flat and anti-puncture tire to guarantee mgn performance and security has become a consensus of the world＇s major tire manufacturers. Therefore, researchers have recently focused their attention on non-pneumatic tires with different structures. But the non-pneumatic tires have the disadvantage of excessive weight, complex processing technology or cooling difficult and so on. Furthermore, the process ofmanufacturing such tire is still in the stage of research and development. To solve the above problems, a mechanical elastic wheel （MEW） for the off-road vehicle is proposed which is a kind of non-pneumatic tire. The MEW could be realized the basic function of traditional pneumatic tire. In additional, the problems such as stinging, puncturing and blasting damage can be avoided. Thus, the MEW is greatly satisfied with requirements of safe service for the special vehicles, such as military vehicles, off-road vehicles, emergency service and disaster relief vehicle. In this paper, to solve the shock vibration transmission and improve vehicle ride performance when the MEW is running over uneven road, we studied the enveloping characteristics and influencing factors of MEW using the flexible roller contact （FRC） model and the method of the finite element simulation and experiments. The influence of loading and radial stiffness on the enveloping characteristics of the MEW was revealed according to the analysis of the effective road input. Moreover, the reliability of the model was verified. The amplitude of effective road input of MEW decreased with the increase of loading, and the disturbance length increased with the increase of loading. Under this circumstance, the radial stiffness was unchanged. And the amplitude of effective road input of MEW increased with the increase of radial stiffness, but the disturbance length decreased with the increase of radial stiffness under a certain loading. The analytical solution, finite element simulation and expe

关 键 词：轮胎 模型 有限元法 机械弹性车轮 包容特性 有效路形 载荷 径向刚度 

分 类 号：U463.3[机械工程—车辆工程]