Evaluation of the coupled dynamical response of a pantograph-catenary system: contact force and stresses
Evaluation of the coupled dynamical response of a pantograph-catenary system: contact force and stresses
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DOI：
10.1080/00423110600744656
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发表时间：
2006-08-01
影响因子：
3.6
通讯作者：
Mei, Guiming
中科院分区：
文献类型：
--
作者：
Zhang, Weihua;Liu, Yi;Mei, Guiming
本文采用欧拉-伯努利梁单元建立了接触网的有限元模型，计算了接触网的静应力及其振动模态。将得到的悬链线振型作为广义变量，用于建立悬链线系统的运动方程。将受电弓的物理模型简化为包含质量、刚度、阻尼和摩擦的多体系统。在推导受电弓-悬链线系统耦合运动方程的基础上，详细分析了受电弓-悬链线系统的动力学行为，计算了受电弓-悬链线系统的接触力。采用接触力作为接触网有限元模型的外部移动载荷，模拟了接触网内部的动应力。通过详细的分析和计算，我们不仅得到了接触网各单元的动应力响应，而且得到了其频率响应。针对辅助钢丝动应力较大的情况，分析了辅助钢丝结构对动应力的影响，提出了降低动应力的方法。最后，通过试验对动应力计算方法进行了验证。
In this article, the static stresses in a catenary and its vibration modes are calculated by establishing the FEM model of the catenary with Euler-Bernoulli beam elements. The mode shapes of the catenary obtained are considered as the generalized variables which are used in the establishment of the motion equations of the catenary system. The physical model of the pantograph is simplified as a multi-body system with mass, stiffness, damping, and friction. On the basis of having derived the coupled motion equations of the pantograph-catenary system, its dynamic behavior is analyzed in detail and the contact force is calculated. Using the contact force as the external moving load of the FEM model of the catenary, the dynamic stress in the catenary is simulated. Through the detailed analysis and calculation, we not only obtain the dynamic stress response at any element of the catenary, but also its frequency responses. As the dynamic stress in the assistant wire is quite large, the influence of its structure on dynamic stress is analyzed and the way to reduce the dynamic stress is suggested. At last, the calculation method of dynamic stress is validated by a test.