• Title, Summary, Keyword: 방진체결장치

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Evaluation of the Performance Test Load through the Estimation of Vertical Loads on Vibration-Proof Fastening Systems (방진체결장치에 작용하는 수직하중 평가를 통한 성능시험하중 평가)

  • Yang, Sin Chu
    • Journal of the Korean Society for Railway
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    • v.19 no.6
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    • pp.777-784
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    • 2016
  • In this study, regulation of the performance test load of a vibration-proof fastening system used in urban railways was established through evaluation of the loads that it bears in the field. In order to investigate the range of the dynamic stiffness of the vibration-proof fastening system, dynamic stiffness tests were carried out for three types of vibration-proof fastening system that can be domestically supplied. Train and track interaction analyses in the frequency domain were carried out to evaluate the dynamic wheel loads. The track irregularity, which is a very important input factor in train and track interaction analysis, was considered as a PSD (Power Spectral Density) function, which was derived based on the measured data. The loads on the vibration-proof rail fastening system were evaluated considering various operating conditions in the urban railway. Regulation of the performance test load of the vibration-proof rail fastening system was established based on the evaluated loads.

Experimental Study of Vibration and Noise Reduction Effect of Railroad Vibration Isolator (철도레일 방진 체결장치의 진동 및 소음 저감 효과에 관한 실험적 연구)

  • Lee, Jang-Hyun;Kim, Tae-Eon;Lee, Seong-Choon;Chon, Ik-Pom
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • pp.1373-1378
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    • 2000
  • Vibration caused by railroad vehicle including subway train running raises a lot of problems to the neighboring buildings. Therefore lots of methods to isolate the railway vibration have been studied and practically applied to sites. As one of them, specially designed vibration isolation device was installed in the some section of Seoul subway. This device is installed between the rail and track slab. Because the process of installation is relatively simple, this method can be applied to the existing railways in servicing. We measured the vibration and noise to check the effectiveness of this device before and after the installation. The result showed that the vibration level of the slab and platform was reduced to 7 - 10 dB. Expecially high frequency component was reduced to a large amount. From this result, we can conclude that these kind of devices are useful to the reduction of the railroad vibration, expecially the high frequency vibration which can cause structure born noise.

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Damage Status of Turnout System with Wooden Sleeper of Concrete Track on Urban Transit (도시철도 콘크리트궤도 목침목 분기기의 손상현황)

  • Choi, Jung-Youl;Han, Kyung-Sung;Bong, Jae-Gun;Jang, Cheol-Ju;Chung, Jee-Seung
    • The Journal of the Convergence on Culture Technology
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    • v.5 no.4
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    • pp.379-385
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    • 2019
  • The purpose of this study is to investigate the damage status of wood sleepers on concrete track of urban transit at different locations and to analyze the causes of damages. In addition, the turnout maintenance history during the service period of about 24 years was analyzed in conjunction with the train passing tonnage and that was to compare the current repair history. The most frequent damage components were rail, tie plate, spike and wooden sleeper. And, the damage caused by the defect of the rail fastening system such as spike and tie plate according to the deformation of the wooden sleeper was analyzed as the main type of damage. As a result, the damage of track components of turnout system was on the increase because they are directly affected by the train passing tonnage. The supplementary points of the check sheet for current turnout maintenance were derived and the improvement proposal was suggested based on the research results.