大型机场地面交通中心由磁悬浮列车和地铁列车引起的振动响应分析

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Construction and Building Materials Pub Date : 2024-11-12 DOI:10.1016/j.conbuildmat.2024.139144

Lidong Wang , Tianyang Sun , Jingcheng Chen , Zhen Zhao , Ying Yang , Zhengyu Fu , Yan Han

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引用次数: 0

摘要

本研究旨在评估机场综合交通枢纽地面交通中心（GTC）在地下磁悬浮列车和地铁列车启动和制动过程中的振动响应。在这项工作中，我们考虑了列车进出地面交通中心的实际运动状态，并计算了磁悬浮列车和地铁列车的牵引特性。在此基础上，建立了考虑变速运动的中、低速磁悬浮列车-导轨和地铁列车-浮置板轨道的垂直耦合振动模型以及车辆纵向运动模型，并据此求得了轨道的垂直力和纵向扣件力。最后，基于两步分析法，将垂直力和纵向扣件力同时应用于轨道-GTC-土有限元模型，以评估磁悬浮列车和地铁列车引起的结构振动。结果表明，垂直扣件力的振幅比纵向扣件力的振幅大一个数量级，地铁列车引起的垂直扣件力的振幅大于磁悬浮列车引起的垂直扣件力的振幅。与制动过程相比，磁悬浮列车和地铁列车的启动过程都会导致 GTC 产生更大的垂直振动响应，其中地铁列车的影响大于磁悬浮列车。在同一区域内，结构柱观测点观测到的垂直振动水平低于板观测点。当磁悬浮列车和地铁列车同时启动时，某些点的振动水平响应超过 75 dB 的规定限值。

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Analysis of vibration responses in a large airport ground transportation centre caused by maglev and subway trains

This study aims to assess the vibration response of the ground transportation centre (GTC) at an airport integrated transportation hub during the starting and braking processes of underground maglev and subway trains. In this work, we considered the actual motion states of trains entering and exiting the GTC and calculated the traction characteristics of maglev and subway trains. On this basis, the vertical coupling vibration models for a medium- and low-speed maglev train-guideway and a subway train-floating slab track considering variable-speed motion, as well as the vehicle longitudinal motion models, were established, and the vertical and longitudinal fastener forces of the tracks were obtained accordingly. Finally, based on the two-step analysis method, the vertical and longitudinal fastener forces were simultaneously applied to the track–GTC–soil finite element model to evaluate the structural vibrations induced by maglev and subway trains. The results show that the amplitude of the vertical fastener force is an order of magnitude greater than that of the longitudinal fastener force, and the amplitude of the vertical fastener force caused by subway trains is greater than that caused by maglev trains. The starting process of both maglev trains and subway trains results in a greater vertical vibration response of the GTC than the braking process, with the impact of subway trains being greater than that of maglev trains. Within the same area, the vertical vibration level observed at structural column observation points is lower than that at slab observation points. When maglev trains and subway trains start simultaneously, the vibration level response at some points exceeds the specified limit of 75 dB.

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来源期刊

Construction and Building Materials 工程技术-材料科学：综合

CiteScore

13.80

自引率

21.60%

发文量

3632

审稿时长

82 days

期刊介绍： Construction and Building Materials offers an international platform for sharing innovative and original research and development in the realm of construction and building materials, along with their practical applications in new projects and repair practices. The journal publishes a diverse array of pioneering research and application papers, detailing laboratory investigations and, to a limited extent, numerical analyses or reports on full-scale projects. Multi-part papers are discouraged. Additionally, Construction and Building Materials features comprehensive case studies and insightful review articles that contribute to new insights in the field. Our focus is on papers related to construction materials, excluding those on structural engineering, geotechnics, and unbound highway layers. Covered materials and technologies encompass cement, concrete reinforcement, bricks and mortars, additives, corrosion technology, ceramics, timber, steel, polymers, glass fibers, recycled materials, bamboo, rammed earth, non-conventional building materials, bituminous materials, and applications in railway materials.