Steady state response of an infinite beam on a viscoelastic foundation with moving distributed mass and load

作     者：Yin Zhang Yin Zhang

作者机构：State Key Laboratory of Nonlinear Mechanics(LNM)Institute of MechanicsChinese Academy of SciencesBeijing 100190China School of Engineering ScienceUniversity of Chinese Academy of SciencesBeijing 100049China 

出 版 物：《Science China(Physics,Mechanics & Astronomy)》 (中国科学：物理学、力学、天文学（英文版）)

年 卷 期：2020年第63卷第8期

页      面：71-85页

核心收录：

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 National Natural Science Foundation of China(Grant No.11772335) the Strategic Priority Research Program(B)of the Chinese Academy of Sciences(Grant No.XDB22020201) the National Key Research and Development Program of China(Grant Nos.2016YFB1200602-09,and 2016YFB1200602-10) 

主　　题：steady state beam viscoelastic foundation moving distributed mass 

摘      要：Compared with the moving concentrated load model,it is more realistic and proper to use the moving distributed mass and load model to simulate the dynamics of a train moving along a railway *** the problem of a moving concentrated load,there is only one critical velocity,which divides the load moving velocity into two categories:subcritical and *** locus of a concentrated load demarcates the space into two parts:the waves in these two domains are called the front and rear waves,*** comparison,in the problem of moving distributed mass and load,there are two critical velocities,which results in three categories of the distributed mass moving *** to the presence of the distributed mass and load,the space is divided into three domains,in which three different waves *** richer and different variation patterns of wave shapes arise in the problem of the moving distributed mass and *** mechanisms responsible for these variation patterns are systematically studied.A semi-analytical solution to the steady-state is also obtained,which recovers that of the classical problem of a moving concentrated load when the length of the distributed mass and load approaches zero.