【摘要】 大量试验结果表明,轮式车辆在行驶过程中当滑转率较高或接近完全滑转时,常常会产生一种较强烈的振动,即所谓“跳跃现象”。本文现对三种不同类型的轮式车辆,在不同的地面条件下所产生这种跳跃现象进行多次试验研究的基础上,拟以4WD车辆为例,建立了一个包括13个自由度的非线性自激振动模型,并应用计算机对车辆在跳跃过程中的动态特性进行了模拟计算,然后,通过将运动方程线性化,并根据多参数系统的振动与稳定性理论,在参数空间中讨论现象的产生机理、失稳条件以及车辆在给定条件下不产生跳跃现象的临界稳定曲面。更多还原

【Abstract】 It has been shown by experiments that wheeled vehicle may often begin to vibrateeubstantially when driving wheels are at high rlip or near to full slip, which is knownss the jumping phenomena. Based on the investigations about this kind of jumping phenomena with three diff-erent types of wheeled vehicle at various conditions, a nonlinear self-excited vibrationfo a 4WD vehicle with thirteen degrees of freedom has been developed in this paper.The vibrating characteristics of the vehicle during the jumping has been analysed withcomputer. Furthermore, by linearizing the moving equations of the system and accord-ng to the theory of vibration and stability about multiple parameter systems, theproduced mechanism about the jumping phenomena and the unstable condition have beendiscussed in the parameter space, and the critical stable curved surface has been obtai-ned.更多还原