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前言铰接式底盘车辆不论在运输、工程机械或农业拖拉机中,都得到了广泛的应用,研究铰接式车辆在横坡上的稳定性,很多学者都是把车辆(或者模型)放在乎板上,使车体纵轴线和坡度方向垂直,然后逐渐改变平板的倾角来研究它的失稳情况。当角度增大到一定程度时,车架开始翻转,使限位块靠紧,消除了摆动间隙,同时一只前轮跷起。这种状态称为“一级失稳”。当平板的倾角继续增大到一定程度时,整个车辆即绕倾翻轴线而倾翻,这种状态称“二级失稳”。这就是所谓“二级失稳理论”。
Introduction Articulated chassis vehicles have been widely used in transportation, construction machinery or agricultural tractors to study the stability of articulated vehicles on the cross-slope. Many scholars put the vehicle (or model) on the board. Make the longitudinal axis of the car body perpendicular to the slope, and then gradually change the tilt angle of the flat plate to study its instability. When the angle is increased to a certain degree, the frame starts to turn over, so that the stopper is tightened, the swing gap is eliminated, and a front wheel is picked up. This state is called “first-order instability.” When the inclination of the flat plate continues to increase to a certain degree, the entire vehicle tilts about the tilting axis, and this state is called “secondary instability.” This is the so-called “secondary instability theory.”