Analysis of Dynamic Behavior of the Train, Slab Track, and Subgrade Coupling System

2016 ◽  
pp. 341-364
Author(s):  
Xiaoyan Lei
Keyword(s):  
Dynamic Behavior ◽  
Slab Track ◽  
Coupling System

Modelling and in-situ measurement of dynamic behavior of asphalt supporting layer in slab track system

2019 ◽  
Vol 228 ◽  
pp. 116776 ◽  
Author(s):  
Song Liu ◽  
Xianhua Chen ◽  
Yuewei Ma ◽  
Jun Yang ◽  
Degou Cai ◽  
...  
Keyword(s):  
Dynamic Behavior ◽  
In Situ Measurement ◽  
Slab Track ◽  
Track System ◽  
Supporting Layer

Evaluation of Dynamic Behavior for Pile-Supported Slab Track System by 3D Numerical Analysis

2017 ◽  
Vol 21 (5) ◽  
pp. 255-264
Author(s):  
Mintaek Yoo ◽  
◽  
Mincheol Back ◽  
Ilhwa Lee ◽  
Jinsun Lee
Keyword(s):  
Numerical Analysis ◽  
Dynamic Behavior ◽  
Slab Track ◽  
Track System

Simulation on the Dynamic Behavior of the Propulsion System Subjected by Hull Deformation for Large Vessels

2015 ◽  
Author(s):  
Zhe Tian ◽  
Xinping Yan ◽  
Cong Zhang ◽  
Weizhong Tan
Keyword(s):  
Dynamic Behavior ◽  
Large Scale ◽  
Propulsion System ◽  
Normal Operation ◽  
Sea Waves ◽  
Ship Propulsion ◽  
Coupling System ◽  
Large Ship ◽  
Important Position ◽  
Large Vessels

This paper aims to investigate the dynamic behavior of the large ship propulsion system subjected by hull deformation. Evident tendency of development of large scale ships was shown that the interaction between the propulsion shaft and ship hull becomes much severer than before. The excited forces caused by severe sea waves have considerable effects on the hull deformation which could have further impact on the shaft propulsion system. On the contrary, the operation quality of ships and the durability of machines are threatened by the malfunctions of shaft propulsion system. As a result the reliability of the vessels has been put in an important position by the companies and the governments all over the world. For scientists, investigating the dynamic behavior of the propulsion system subjected by the hull deformation is a meaningful research to avoid malfunction of machine in navigation. Numerical analysis is now an effective method to analyze some key components on large vessels. Taking the 8530TEU container as an example, a numerical model of the large ship propulsion-hull coupling system is presented in this paper to analyze the dynamic behavior of the ship propulsion system subjected by hull deformation. The hull deformations are obtained under different sea conditions as the exciting forces which are used on the coupling system. Then the dynamical responds of the ship shaft are obtained. Based on the results, suggestions are proposed to ensure the normal operation of the propulsion system in different sea conditions.

A numerical train–floating slab track coupling model based on the periodic-Fourier-modal method

2016 ◽  
Vol 232 (1) ◽  
pp. 315-334 ◽  
Author(s):  
Longxiang Ma ◽  
Weining Liu
Keyword(s):  
Numerical Model ◽  
Dynamic Response ◽  
Moving Load ◽  
Coupling Model ◽  
Principle Of Superposition ◽  
Fourier Modal Method ◽  
Slab Track ◽  
Model Based ◽  
Coupling System ◽  
Modal Method

A numerical model based on the periodic-Fourier-modal method is proposed for the dynamic analysis of a train-floating slab track coupling system with random track irregularity. In the model, each vehicle of the train is modeled as a multiple-degree-of-freedom vibration system consisting of one car body, two bogies, four wheelsets, and two groups of spring-damper suspension devices. The floating slab track is modeled as a periodic-infinite structure with discrete supports and discontinuous slabs. Linear springs are used to couple the train and the track. In order to establish this numerical model, an efficient periodic approach named periodic-Fourier-modal method for solving the dynamic response of the floating slab track under a harmonic moving load is first developed. Based on this, a strategy is then proposed which can couple the moving train to the track with random irregularity and express the wheel–rail force as a superposition of a series of harmonic loads. With the solved wheel–rail force, the vehicle response can be directly calculated through vehicle dynamics, while track response can be calculated through the principle of superposition and the reuse of the initially proposed periodic-Fourier-modal method. Using this train–floating slab track coupling model, the solution of the dynamic response of the infinite track can be transformed to perform only within a single periodic range, which can save the calculation time significantly. The numerical results of the Beijing subway, based on the proposed model, are discussed in detail, and some important conclusions are drawn.

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