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- Title
城市轨道交通高架线减振扣件设计及现场应用.
- Authors
张 欢; 胡岳银; 肖俊恒; 胡尚衡; 吴玥; 朱煜; 姜凯; 贺志文
- Abstract
After a period of operation, the under-locking double-layer nonlinear vibration damping fasteners used in some urban rail transit elevated lines in our country may lead to rail suspension and difficulties in maintaining the gauge, which affects the safety of train operation. Designing a kind of vibration damping fastener, which can not only ensure the safety of train operation, but also adapt to different rail longitudinal resistance requirements of elevated lines and achieve medium vibration damping effect, has become an important problem to be studied. A vibration damping fastener is designed for the urban rail elevated line, and the main technical parameters of the fastener are determined according to the field use conditions. The key component elastic plate adopts rubber vulcanization technology to vulcanize the plate with rail cant and steel sleeve into a whole. This structure can realize vertical low stiffness and provide certain transverse stiffness. The strength of the plate and vulcanized rubber is checked by finite element analysis software. A series of fastener assembly performance tests, such as the rail longitudinal resistance test, assembly fatigue performance test and insulation performance test, are carried out indoor. The test results show that the performance indicators of the vibration damping fastener meet the design requirements. Trial laying and real vehicle tests are carried out on the elevated section of Ningbo Metro Line 1. The field application results show that the trial-paved vibration damping fasteners are in good service and can meet the requirements of train operation and daily maintenance and repair; The dynamic performance indicators of the track structure of the vibration damping fasteners all meet the requirements of the specification. The maximum insertion loss of the Z vibration level of the beam surface is 8. 3 dB, and the root mean square difference of the frequency division vibration level of the beam surface is 9. 8 dB. The maximum vibration level of frequency division of the beam surface is 72. 1 dB, which achieves medium vibration damping effect.
- Publication
Railway Standard Design, 2024, Vol 68, Issue 4, p42
- ISSN
1004-2954
- Publication type
Article
- DOI
10.13238/j.issn.1004-2954.202209060007