基于简化模型的铁路简支梁桥横向振动分析方法  

Analysis Method of Lateral Vibration of Simply Supported Railway Bridge Based on Simplified Model

作　　者：战家旺[1] 苗慧磊 王昱杰 许鑫祥 ZHAN Jiawang;MIAO Huilei;WANG Yujie;XU Xinxiang(School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China;Tianjin Municipal Engineering Design&Research Institute,TianJin 300392,China)

机构地区：[1]北京交通大学土木建筑工程学院,北京100044 [2]天津市政工程设计研究总院有限公司,天津300392

出　　处：《铁道学报》2023年第9期178-184,共7页Journal of the China Railway Society

基　　金：国家自然科学基金(52178100)。

摘　　要：为解决铁路简支梁桥横向车桥耦合仿真分析方法效率低下的问题,提出考虑桥墩影响的铁路简支梁桥横向振动简化模型和分析方法。首先将列车横向激励简化为移动蛇形力,将桥梁横向简化为弹性支承梁;其次推导弹性支承梁在移动蛇形力作用下的振动解析解并分析共振消振条件;最后将简化分析方法与既有车桥耦合仿真分析方法得到的结果进行对比,以验证该方法的正确性并对其适用性进行探究。结果表明:该方法得到的桥梁横向振动随相关参数的变化规律与既有车桥耦合仿真分析方法一致,同时大大提高了分析效率,具有一定实用价值。In order to solve the problem of inefficient analysis of the lateral vehicle-bridge coupling simulation of simply supported railway bridges,this paper proposed a simplified model-based analysis method considering the influence of the pier for the lateral vibration of simply supported railway bridges.Firstly,the lateral excitation of the train was simplified as a moving hunting force,with the bridge lateral simplification considered as an elastic support beam.Secondly,the analytical solution of the vibration of the elastic supporting beam under the action of the moving hunting force was derived and the resonance damping conditions were obtained.In the end,the results obtained by the simplified analytical method and the vehicle-bridge coupling simulation analytical method were compared to verify the effectiveness of the method and to explore its applicability.The results show that the changing law of lateral vibration is consistent with the results of vehicle-bridge coupling simulation,and the simplified analysis method has the higher efficiency as well as certain practical value.

关 键 词：铁路简支梁桥 横向振动 简化模型 弹性支承梁 蛇形运动 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]