Dynamic behavior of high-speed maglev guideway girders with quadratically-varied cross-section

IF 5.6 1区工程技术 Q1 ENGINEERING, CIVIL

Engineering Structures Pub Date : 2024-11-04 DOI:10.1016/j.engstruct.2024.119140

Fei Chen , Nianguan Teng , Jinghai Gong , Man-Tai Chen

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引用次数: 0

Abstract

This study focuses on the numerical investigation on the coupling vibration responses of high-speed maglev vehicle-guideway system incorporated with guideway girders with quadratically-varied cross-section and the new generation high-speed maglev trains. Finite element model for the coupling vibration responses analysis of maglev vehicle-guideway system was established and validated against the existing field test results. With the verified model and program, a total of 5292 numerical models were included to comprehensively investigate the influences of cross-sectional geometries and span length of the guideway girder as well as the vehicle speed on the coupling vibration responses of high-speed maglev vehicle-guideway system. The coupling vibration responses, including impact coefficient, maximum suspension gap and maximum displacement of bogie as well as maximum displacement of the car-body, were analyzed. Recommendation on the dynamic performance indicator was proposed for the guideway girders with quadratically-varied cross-section. Prediction models regarding the impact coefficient and mid-span maximum acceleration of guideway girders with quadratically-varied cross-section were developed based on the Artificial Neural Network analysis method.

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具有二次变化截面的高速磁悬浮导轨梁的动态特性

本研究的重点是对高速磁悬浮车辆-导轨系统的耦合振动响应进行数值研究，该系统采用了横截面为二次变化的导轨梁和新一代高速磁悬浮列车。建立了用于磁悬浮车辆-导轨系统耦合振动响应分析的有限元模型，并根据现有的现场测试结果进行了验证。利用验证后的模型和程序，共建立了 5292 个数值模型，全面研究了高速磁浮车-导轨系统的横截面几何形状、导轨梁跨度和车辆速度对耦合振动响应的影响。分析了耦合振动响应，包括冲击系数、最大悬挂间隙、转向架最大位移和车体最大位移。针对横截面二次变化的导轨梁提出了动态性能指标建议。基于人工神经网络分析方法，建立了四边形截面导轨梁冲击系数和跨中最大加速度的预测模型。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Engineering Structures 工程技术-工程：土木

CiteScore

10.20

自引率

14.50%

发文量

1385

审稿时长

67 days

期刊介绍： Engineering Structures provides a forum for a broad blend of scientific and technical papers to reflect the evolving needs of the structural engineering and structural mechanics communities. Particularly welcome are contributions dealing with applications of structural engineering and mechanics principles in all areas of technology. The journal aspires to a broad and integrated coverage of the effects of dynamic loadings and of the modelling techniques whereby the structural response to these loadings may be computed. The scope of Engineering Structures encompasses, but is not restricted to, the following areas: infrastructure engineering; earthquake engineering; structure-fluid-soil interaction; wind engineering; fire engineering; blast engineering; structural reliability/stability; life assessment/integrity; structural health monitoring; multi-hazard engineering; structural dynamics; optimization; expert systems; experimental modelling; performance-based design; multiscale analysis; value engineering. Topics of interest include: tall buildings; innovative structures; environmentally responsive structures; bridges; stadiums; commercial and public buildings; transmission towers; television and telecommunication masts; foldable structures; cooling towers; plates and shells; suspension structures; protective structures; smart structures; nuclear reactors; dams; pressure vessels; pipelines; tunnels. Engineering Structures also publishes review articles, short communications and discussions, book reviews, and a diary on international events related to any aspect of structural engineering.