Fractures of etype Fastening Clip by Spectral Analysis Method

doi:10.11908/j.issn.0253-374x.2017.07.009

Home > Archive>Volume 45, Issue 07, 2017 >1000-1008. DOI:10.11908/j.issn.0253-374x.2017.07.009

Fractures of etype Fastening Clip by Spectral Analysis Method
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                        10.11908/j.issn.0253-374x.2017.07.009
                    
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                        XIAO HongXIAO Hong
College of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China; Beijing Key Lab of Track Engineering， Beijing Jiaotong University， Beijing 100044， China
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MA ChunshengMA Chunsheng
College of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China
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GUO XiaoGUO Xiao
College of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China
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WANG JiabinWANG Jiabin
College of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China
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Clc Number:U231+.94
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Abstract:

A refined etype fastener model based on its real size was established and nonlinear contact and restraints were used to deal with the interaction between the components of the fastener. The modal shapes and harmonic response characters of the fastener, in both unrestraint and service status, were analyzed using the timefrequency responses analytical method. Besides, the main cause for fastener fracture was revealed and compared with the field test results. This research shows that the first and second resonance frequencies of fasteners in unrestraint and service status (808 Hz~812 Hz, 869 Hz and 410 Hz~420 Hz, 530 Hz) agree with the test section corrugation frequencies, which is the main cause leading to fasteners fracture. An effective way to reduce or avoid fastener fracture is to change the running speed of the train. To avoid the resonant response, it is recommended to control the traveling speed under 80 km?h-1 after calculation.

Key words:metro; fastener fracture; refined model; spectrum analysis; resonance; corrugation frequencies

Reference

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XIAO Hong, MA Chunsheng, GUO Xiao, WANG Jiabin. Fractures of etype Fastening Clip by Spectral Analysis Method[J].同济大学学报(自然科学版),2017,45(07):1000~1008

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Received:October 22,2016
Revised:May 01,2017
Adopted:April 18,2017
Online: July 20,2017
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