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Journal of Sound and Vibration, 2019 Abstract The effect of large-scale variation in the support stiffness on railway track degradation is studied using a frequency-domain approach. The model used can deal with parametric excitation due to both the discrete sleeper spacing and arbitrary large-scale spatial track non-uniformity.
Mehran Sadri +2 more
exaly +5 more sources
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Construction and Building Materials, 2020
Abstract The effect of using a novel additional anti-vibration sleeper track (AAST) to reduce low-frequency vibrations (40–80 Hz) is investigated via numerical and field tests. A computational model is used to investigate the effects of sleeper spacing and track support stiffness. To verify the performance of the AAST, a field test was performed. The
Deokyong Sung, Seongkyu Chang
exaly +2 more sources
Abstract The effect of using a novel additional anti-vibration sleeper track (AAST) to reduce low-frequency vibrations (40–80 Hz) is investigated via numerical and field tests. A computational model is used to investigate the effects of sleeper spacing and track support stiffness. To verify the performance of the AAST, a field test was performed. The
Deokyong Sung, Seongkyu Chang
exaly +2 more sources
Vehicle System Dynamics, 2014 Train-induced ground vibration can be excited by wheel and track irregularities and by two kinds of irregularities of the soil, by geometric irregularities or by the spatially varying soil stiffness. For both types of irregularities, the effective track irregularity on top of the track is calculated in wavenumber domain and with wavenumber integrals ...
Auersch, Lutz
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Evaluation of Track Support Stiffness and Track Impact factor for Ballast and Concrete Type Tracks
Journal of the Korean Society for Railway, 2018궤도지지강성은 열차하중에 대한 궤도구조의 정, 동적 지지성능을 나타내는 궤도성능 및 품질 평가의 지표로서, 궤도구조형식 별로 다양한 특성치를 갖는 특정 궤도시스템의 고유특성이며, 궤도시스템별 구조특성 및 탄성범위와 선로구조물, 접속부 등 선로조건에 직접적인 영향을 받는다. 궤도충격계수는 열차속도에 따라 변화하는 동적 하중에 의한 영향을 고려하는 궤도해석 및 설계의 주요변수로, 동적 윤중변동률의 확률론적 해석으로 산출되며, 열차주행에 따라 변동되는 차륜-레일의 상호작용력 수준과 궤도구조에 작용하는 동적하중의 증폭수준을 평가할 수 있다.
Gwang-Tae Noh +3 more
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Journal of Zhejiang University-SCIENCE A, 2021
To improve the low-frequency vibration reduction effect of a steel spring floating slab track (FST), nonlinear quasi-zero-stiffness (QZS) vibration isolators composed of positive stiffness elements (PSEs) and negative stiffness elements (NSEs) were used to support the FST. First, considering the mechanical characteristics of the nonlinear QZS vibration
Ze-ming Zhao +5 more
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To improve the low-frequency vibration reduction effect of a steel spring floating slab track (FST), nonlinear quasi-zero-stiffness (QZS) vibration isolators composed of positive stiffness elements (PSEs) and negative stiffness elements (NSEs) were used to support the FST. First, considering the mechanical characteristics of the nonlinear QZS vibration
Ze-ming Zhao +5 more
openaire +1 more source
Influence of Large Track Maintenance Machine on Sleeper Supporting Stiffness
Advanced Materials Research, 2014Large track maintenance machine is one of the most important components of modernization of rail technical equipment. The sleeper supporting stiffness after large track maintenance operation has an effect on the safety and stability of train operation.
Meng Nan Zhang +3 more
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Study of railway track stiffness modification by polyurethane reinforcement of the ballast [PDF]
Transportation Geotechnics, 2014 This paper presents the measured results of full-scale testing of railway track under laboratory conditions to examine the effect on the track stiffness when the ballast is reinforced using a urethane cross-linked polymer (polyurethane).
P K Woodward +2 more
exaly +2 more sources