摘要
建立了用来计算车桥耦合系统各阶固有频率的特征值方法理论,研究了系统的各阶固有频率随车辆在桥梁上相对位置和车辆与桥梁相对刚度的变化规律,以及系统基频随车速和加速度的变化规律.数值算例结果表明,车桥耦合系统的各阶固有频率不仅与相对位置有关,而且与相对刚度有关,并且呈现一定的规律性,车速和加速度对耦合系统的基频也有一点程度的影响,若用桥梁的固有频率取代耦合系统的固有频率将会产生较大误差.
The formula to calculate the natural frequencies of vehicle-bridge coupled system was established. Changes of the various steps natural frequencies of the coupled system with position ratio and stiffness ratio and the fundamental frequencies with speed and acceleration of the vehicle were researched. The results of numerical examples show that the natural frequencies of coupled system are related, not only to the location ratio but also to the stiffness ratio. The speed and acceleration of vehicle to the fundamental frequencies of coupled system produce different effects. Sometimes there will be bigger error if the natural frequencies of bridge are used instead of the natural frequencies of coupled system.
出处
《动力学与控制学报》
2010年第3期258-262,共5页
Journal of Dynamics and Control
基金
湖南大学2007年国家级大学生创新性实验计划立项项目~~
关键词
车桥耦合系统
固有频率
特征值计算法
vehicle-bridge coupled system
natural frequency
eigenvalue computation method
