基于梁段单元法轨道连续箱梁的车桥耦合动力响应分析

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振动与冲击 ›› 2016, Vol. 35 ›› Issue (17) : 88-94.

论文

欧阳冲，陈应波，谢伟平，孙亮明

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Dynamic Response Analysis on Vehicle-Bridge Interaction of Railway Box Girders Based on Beam Segment Model

OUYANG Chong1 CHEN Yingbo2 XIE Weiping2 Sun Liangming2

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摘要

城市轨道交通可能会引起桥梁振动安全性问题和列车运行平稳性问题。建立精确、快速及通用性较好的车桥耦合计算程序，可对新兴的轨道交通进行振动预测提供借鉴。目前车桥耦合研究中，基于有限元软件建立的桥梁模型，通用性不高；而直接利用空间梁单元建模则无法考虑桥梁面板横向振动差异。采用梁段单元建立桥梁模型，并在MATLAB中建立整个车桥计算程序；以宁波轨道交通一号线为数值模拟对象，将计算结果与实测数据对比验证，最后考虑了不同车速对列车运行平稳性的影响。研究得到，直线运行的状态下，车桥响应都有竖向振动比横向振动受车速影响更大的趋势，且底板垂向加速度幅值最大，比腹板横向及悬臂板垂向振动加速度要显著的多；基于平稳性指标的评价结果比加速度指标更加合理。

Abstract

The urban rail transit may cause safety issues about bridge vibration and train running stability. With an accurate, fast and versatile calculation procedures on vehicle-bridge interaction, it will be reference for predicting the vibration caused by emerging urban rail transit. The versatility of bridge model based on finite element software in coupling of vehicle-bridge was not high; Bridge model established straightly with beam element can not consider the lateral vibration of bridge differences along panel. The research use beam segment finite element method build bridge model and establish the entire calculation program in MATLAB; Furthermore, Ningbo Rail Transit Line 1 is taken as numerical simulation object for comparing the results with the measured data, and finally consider the influence about the stability with different speed of the train. The result show that, speed increased affect the vertical vibrations easier than the transverse vibration by trends in both vehicle and bridge in straight line. The vertical acceleration of bottom of bridge has always maximum level, the amplitude is much greater than the webs transverse acceleration and the cantilever plate vertical acceleration; Evaluation result based on the stability index is more reasonable than the acceleration indicators.

关键词

轨道连续箱梁 / 梁段单元 / 车桥耦合 / 平稳性

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欧阳冲，陈应波，谢伟平，孙亮明. 基于梁段单元法轨道连续箱梁的车桥耦合动力响应分析[J]. 振动与冲击, 2016, 35(17): 88-94

OUYANG Chong1 CHEN Yingbo2 XIE Weiping2 Sun Liangming2 . Dynamic Response Analysis on Vehicle-Bridge Interaction of Railway Box Girders Based on Beam Segment Model[J]. Journal of Vibration and Shock, 2016, 35(17): 88-94

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