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Time domain method for high speed train -
Bridge vertical stochastic vibration analysis
Article · June 2008
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Xiaozhen Li
Southwest Jiaotong University
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Aerodynamic force Interaction of Vehicle-Bridge Sysytem under Cross wind View project
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第 28卷第 3期地震工程与工程振动
2008年 6月 JOURNALOFEARTHQUAKEENGINEERINGANDENGINEERINGVIBRATION
文章编号:1000-1301(2008)03-0110-06
高速列车-桥梁竖向随机振动的时域分析方法
晋智斌, 强士中, 李小珍
(西南交通大学土木工程学院桥梁系, 四川成都 610031)
摘要:提出时间相关多维有色噪声形式的轨道不平顺激励下列车-桥梁耦合系统协方差响应的时域
递推方法。用白噪声滤波法生成轨道不平顺有色噪声过程, 在宽频带内识别滤波器参数以同时实现
滤波成型和波长截断功能。提出基于高阶 Pade近似的累次时滞系统, 以实现列车多轮对下轨道不平
顺激励的大时滞再现;再结合成型滤波器构造列车下轨道不平顺激励的一致白噪声模型。建立列车
-桥梁垂向振动的状态方程, 将其与激励模型联立得到一致白噪声激励下的列车-桥梁扩阶状态方
程。将方差递推法推广到时变系统, 求解列车-桥梁系统的随机振动。分析结果与 MonteCarlo模拟
法符合良好, 表明了方法的正确性。
关键词:列车-桥梁耦合振动;轨道不平顺;一致白噪声;随机振动
中图分类号: 文献标志码:A
Timedomainmethodforhighspeedtrain-bridge
verticalstochasticvibrationanalysis
JINZhibin, QIANGShizhong, LIXiaozhen
(SchoolofCivilEngineering, SouthwestJi