列车-曲线桥梁系统耦合振动分析

发布时间：2018-09-03 14:28

【摘要】：为进一步研究列车-曲线桥梁系统耦合振动特性,基于车辆-桥梁/轨道系统动力相互作用分析理论,采用模态叠加法建立列车-曲线桥梁系统的空间耦合振动方程.沿轨道中心线建立移动坐标系,借助坐标转换,确定列车通过曲线桥梁时的几何位置关系;考虑列车曲线运动特点,基于赫兹弹性接触理论和卡尔克(Kalker)蠕滑理论,解决列车曲线运动时的轮轨接触耦合关系,并对广义力向量进行修正;采用龙格库塔积分法求解列车-曲线桥梁的动力响应.依据以上理论,研究了曲率半径、曲线超高以及车速对列车-曲线桥梁耦合振动响应的影响规律.分析结果表明:桥梁和列车的振动响应随车速的增大而增大,随着曲线半径的增大而减小.桥梁的振动响应不随曲线超高的增大而变化,列车的振动响应在平衡超高和过超高时较小.
[Abstract]:In order to further study the coupled vibration characteristics of train-curve bridge system, based on the dynamic interaction analysis theory of vehicle-bridge / track system, the spatial coupling vibration equation of train-curve bridge system is established by modal superposition method. The moving coordinate system is established along the centerline of the track, and the geometric position relation of the train passing through the curved bridge is determined by means of coordinate transformation, considering the characteristics of the train curve motion, the Hertz elastic contact theory and the Karke (Kalker) creep-slip theory are considered. The wheel-rail contact coupling relation is solved and the generalized force vector is modified. The Runge-Kutta integration method is used to solve the dynamic response of the train-curve bridge. Based on the above theory, the influence of curvature radius, curve superelevation and speed on the coupled vibration response of train-curve bridge is studied. The results show that the vibration response of the bridge and train increases with the increase of the speed and decreases with the increase of the radius of the curve. The vibration response of the bridge does not change with the increase of the curve superelevation, but the vibration response of the train is smaller when the equilibrium is super high and the train is too high.
【作者单位】：同济大学桥梁工程系;上海工程技术大学轨道交通学院;
【基金】：国家自然科学基金资助项目(50908178) 高等学校博士学科点专项科研基金资助项目(20090072110044)
【分类号】：U441.3

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