张 楠, 夏 禾, G. De Roeck. 车桥系统频谱及参数敏感性分析[J]. 工程力学, 2009, 26(11): 197-202.
引用本文: 张 楠, 夏 禾, G. De Roeck. 车桥系统频谱及参数敏感性分析[J]. 工程力学, 2009, 26(11): 197-202.
ZHANG Nan, XIA He. SPECTRUM AND SENSITIVITY ANALISYS OF VEHICLE-BRIDGE INTERACTION SYSTEM[J]. Engineering Mechanics, 2009, 26(11): 197-202.
Citation: ZHANG Nan, XIA He. SPECTRUM AND SENSITIVITY ANALISYS OF VEHICLE-BRIDGE INTERACTION SYSTEM[J]. Engineering Mechanics, 2009, 26(11): 197-202.

车桥系统频谱及参数敏感性分析

SPECTRUM AND SENSITIVITY ANALISYS OF VEHICLE-BRIDGE INTERACTION SYSTEM

  • 摘要: 该文以刚体动力学方法建立车辆子系统模型,以有限元法建立桥梁子系统模型,假定轮对运动为钢轨运动、轨道不平顺、轮对蛇形波三者的代数和,研究了车桥耦合系统的求解方法及响应的特性。以秦沈客运专线狗河特大桥跨度24m预应力混凝土简支梁作为算例,采用滤波方法分析了桥梁的位移响应、加速度响应的频谱成份,并讨论了桥梁响应对轨道不平顺幅值、蛇行波幅值、蛇行波波长等参数的敏感性。

     

    Abstract: The dynamic model of vehicle-bridge system is established in this paper, in which the vehicle subsystem is modeled by rigid body dynamics method; the bridge subsystem is modeled by finite element method; the movement of wheel set is assumed as sum of track movement, track irregularity and hunting movement. The solving method and the characteristics of the response for vehicle-bridge interaction system are studied. A 24m simple-supported girder of the Gouhe Bridge in the Qinghuangdao-Shenyang Special Passenger Railway is chosen as a case. The displacement and acceleration responses of the bridge are filtered in order to analyze the frequency components of them. The sensitivities of the track irregularity, hunting amplitude and hunting wavelength for the vibration in the mid span of the bridge are discussed.

     

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