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Effects of high-speed train’s wheel wear on vibration characteristics of track and bridge |
CHANG Chao1, XIAO Qian1,2, WANG Yapeng3 |
1. Key Laboratory of vehicle operation engineering of Ministry of Education, Nanchang Jiangxi 330013, China;
2. StateKey Laboratory of Traction Power, Southwest China Jiaotong University, Chengdu Sichuan 610031, China;
3. College of civil engineering, LanZhou JiaoTong University, Lanzhou Gansu 730070, China |
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Abstract Taking a certain type of domestic EMU, CRTS III ballast-less track and a 32 m long simply supported girder bridge as the study object, based on the theory of train-track-bridge coupled dynamics and the fixed-interface modal synthesis method, using the joint simulation method with the multi-body dynamic software UM and the software ANSYS and HYPERMESH, a 3D train-track-bridge coupled dynamic sophisticated model was established to perform numerical simulation adopting the non-elliptic multi-point wheel/rail contact algorithm. In numerical example, taking a high-speed train passing through a 3-span simply supported girder bridge as the computation background, effects of wheel wear on vibration characteristics of track and bridge structure under different mileages and speeds were analyzed. The results showed that effects of wheel wear on transverse vibration characteristics of track and bridge structure are larger than those on vertical ones; transverse vibration response index increases with increase in wheel wear; transverse vibration response causes the main vibration frequencies of track and bridge to drift and their vibration amplitude to be abnormal; wheel wear affects structure’s middle and high order vibration frequencies more significantly, so the effects of wheel/rail profile changes should be considered in designs of track and bridge structure to reduce these effects.
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Received: 18 December 2017
Published: 28 June 2019
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