Effect of track irregularity on the dynamic response of a slab track under a high-speed train based on the composite track element method》.pdfVIP

Applied Acoustics 99 (2015) 72–84 Contents lists available at ScienceDirect Applied Acoustics journal homepage: /lo cate/apacoust Effect of track irregularity on the dynamic response of a slab track under a high-speed train based on the composite track element method Xinwen Yang a,⇑, Shaojie Gu a, Shunhua Zhou a, Jianjin Yang b, Yu Zhou a, Songliang Lian a a Key Laboratory of Road and Traffic Engineering of the Ministry of Education, Tongji University, Shanghai 201804, China b School of Mechatronic Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China a r t i c l e i n f o a b s t r a c t Article history: Slab tracks are common track structures in high-speed railways. In this study, a vehicle/slab track inter- Received 5 May 2014 action model is developed based on vehicle–track coupling dynamics theory, and composite track ele- Received in revised form 13 January 2015 ments are used to rapidly model the finite element equations of the slab track based on the stationary Accepted 20 May 2015 value theory of total potential energy. In the model, the rail is represented as a discretely-supported infi- Available online 10 June 2015 nite beam, the slab and the base are considered as continuously-supported free beams, and the connec- tions of the track structure are modelled as viscoelastic spring–damping elements. The composite track Keywords: element method effe