Investigation of the Dynamic Performance of High-Speed Railway Bridges in Cold Regions Based On Vehicle-Bridge Coupling Vibrations

IF 1.8 Q2 ENGINEERING, MULTIDISCIPLINARY ASCE-ASME Journal of Risk and Uncertainty in Engineering Systems Part B-Mechanical Engineering Pub Date : 2023-10-05 DOI:10.1115/1.4063595

Qingfei Gao, Qiyuan Li, Haoran Wang, Jiaqiang Zhang, Tong Wang

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Abstract

Abstract This work uses numerical simulations to systematically study the dynamic performance of high-speed railroad bridges in cold areas based on coupled vibration analyses of axles and vehicles during freeze?thaw cycles. The freezing and thawing cycles of perennial frozen soil were established with COMSOL software, and the changes of the soil components during freezing and thawing cycles were analyzed with an indirect solution method and reasonable hydrothermal parameters and freezing and thawing boundary conditions. With the establishment of a pile?soil interaction simulation model, the change rule for pile foundation displacement and the force characteristics of pile foundations during freeze?thaw cycles were studied. ABAQUS and UM software was used to simulate the coupled vibrations of axles, select the indexes for evaluation of train safety and the smoothness of the high-speed railroad trains, and investigate the influence of foundation freezing and pulling displacements on the dynamic performance of high-speed trains.

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基于车桥耦合振动的寒区高速铁路桥梁动力性能研究

摘要:本文采用数值模拟的方法，对严寒地区高速铁路桥梁的动力性能进行了系统的研究。解冻周期。利用COMSOL软件建立了多年生冻土的冻融循环，采用间接解法和合理的水热参数及冻融边界条件，分析了冻融循环过程中土壤组分的变化。与建立一桩?土体相互作用模拟模型、冻结过程中桩基位移变化规律及桩基受力特性研究了解冻周期。采用ABAQUS和UM软件对车轴耦合振动进行仿真，选择列车安全性和高速列车平稳性评价指标，研究基础冻结和拉位移对高速列车动力性能的影响。

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来源期刊

ASCE-ASME Journal of Risk and Uncertainty in Engineering Systems Part B-Mechanical Engineering ENGINEERING, MULTIDISCIPLINARY-

CiteScore

5.20

自引率

13.60%

发文量