Eigenvalue theory was used to investigate the critical hunting velocity. The influence of aerodynamic force on the critical hunting velocity and the curve negotiation performance was analyzed.

采用特征值分析理论确定了线性系统的临界蛇行速度,分析了气动力对车辆蛇行临界速度及曲线通过性能的影响;采用数值积分方法研究了车辆在气动力和轮缘力联合作用下的极限环响应。

Bend and torsion will appear clearly when the insectsflap their wings. These flexible deformation are important for aerodynamic force plus,energy saving and higher stability.

昆虫翼在拍动时会产生显著的弯曲和扭转变形，这种柔性变形效应有可能对飞行的气动力增益、节能或增强稳定性等起重要作用，成为与扑翼方式相联系的另一个作用机制。

However the aerodynamic force on car is improving with the elevator’s speed, so studying the high-speed elevator’s aerodynamic force has great significance on supressing the elevator vibration and improving the elevators’comfort.

然而,随着电梯运行速度的提高,其在运行过程中所受到的垂直和横向气体扰动力也随之增大,因此,高速电梯气体扰动力的研究,对电梯的减振、提高其乘座的舒适性具有十分重要的意义。