Analysis of vibration reduction characteristics and applicability of steel-spring floating-slab track

作     者：Wanming ZHAI Peng XU Kai WEI Wanming ZHAI*,Peng XU,Kai WEI Traction Power State Key Laboratory,Southwest Jiaotong University,Chengdu 610031,China

作者机构：Traction Power State Key Laboratory Southwest Jiaotong University Chengdu 610031 China 

出 版 物：《Journal of Modern Transportation》 (现代交通学报（英文版）)

年 卷 期：2011年第19卷第4期

页      面：215-222页

学科分类：08[工学] 0814[工学-土木工程] 082301[工学-道路与铁道工程] 0823[工学-交通运输工程] 

基　　金：supported by the Key Project of Science and Technology in an Action of Shanghai Scientific and Technological Innovation (No. 09231201600) the National Natural Science Foundation of China(No. 50823004) the Science and Technology Department of Sichuan Province 

主　　题：integrated structures natural vibration characteristics subway vibration steel-spring floating-slab track steel-spring fulcrum force frequency spectrum analysis 

摘      要：A coupled dynamics computation model for metro vehicles, along with a steel-spring floating-slab track, is developed based on the theory of vehicle-track coupled dynamics. Using the developed model, the influences of the thickness, length and mass of floating-slab, spring rate and its arrangement space, running speed, etc. on the time and frequency domain characteristics of steel-spring fulcrum force are analyzed. The applicability of steel-spring floatingslab track is discussed through two integrated example cases of metro and buildings possessing distinct natural vibra- tion characteristics. It is concluded that, it is quite significant, in the optimization modular design of the parameters of steel-spring floating-slab track, to take the matching relationship of both the amplitude-frequency characteristics of steel-spring fulcrum force and natural vibration characteristics of integrated structures into comprehensive consideration. In this way the expensive steel-spring floating-slab track can be economically and efficiently utilized according to the site condition, and at the same time, the economic losses and bad social impact resulted from the resonance during usage of steel-spring floating-slab track can be avoided.