铁路桥梁行车振动分析的等效输入法

An “Equivalante Input” Method for the Analysis of Vibration of Railway Bridges under Train Load

本文指出,列车一桥梁振动系统具有自激振动的性质,如此,基于结后动力学一般理论及能量原理,我们可以避开复杂的列车轮对蛇行激扰源研究之困难,而任选车桥系统某一自由度方向的振动响应作为等效动力输入,从而求算出整个车桥系统的空间振动响应。

It is demonstrated that the train-bridge system has the property of self-stimulated vibration.Based on the theory of dynamics ofstructures and the energy principle,it is Verified that,taking thevibration history of any coordinate(DOF) of train-bridge system asthe “equivalent input”,the whole dynamic response of the systemCan be Calculated diretly,and it is not necessary for us toConsider the hunting history of train wheels in the research of theanalysis of Vibration of train-bridge system.