Dynamic response of a three-beam system with intermediate elastic connections under a moving load/mass-spring

作     者：Feng Yulin Jiang Lizhong Zhou Wangbao Feng Yulin;Jiang Lizhong;Zhou Wangbao

作者机构：School of Civil EngineeringCentral South UniversityChangsha 410075China National Engineering Laboratory for High Speed Railway ConstructionCentral South UniversityChangsha 410075China 

出 版 物：《Earthquake Engineering and Engineering Vibration》 (地震工程与工程振动（英文刊）)

年 卷 期：2020年第19卷第2期

页      面：377-395页

核心收录：

学科分类：08[工学] 0818[工学-地质资源与地质工程] 081402[工学-结构工程] 0815[工学-水利工程] 081304[工学-建筑技术科学] 0813[工学-建筑学] 0802[工学-机械工程] 0814[工学-土木工程] 0801[工学-力学（可授工学、理学学位）] 

基　　金：The Fundamental Research Funds for the Central Universities of Central South University under Grant No.2018zzts189 the National Natural Science Foundations of China under Grant Nos.51408449 and 51778630 the Innovation-driven Plan in Central South University under Grant No.2015CX006 

主　　题：finite Sine-Fourier transform three-beam system moving load mass-spring critical speeds 

摘      要：The objective of this research is to study the dynamic response characteristics of a three-beam system with intermediate elastic connections under a moving load/*** this study,the finite Sine-Fourier transform was performed for the dynamic partial differential equations of a simply supported three-beam system(SSTBS)under a moving load and a moving mass-spring,*** dynamic partial differential equations were transformed into dynamic ordinary differential equations relative to the time coordinates,and the equations were solved and the displacement Fourier amplitude spectral expressions were ***,based on finite Sine-Fourier inverse transform,the expressions for dynamic response of SSTBS under the moving load and moving mass-spring were *** proposed method,along with ANSYS,was used to calculate the dynamic response of the SSTBS under a moving load/mass-spring at different *** results obtained herein were consistent with the ANSYS numerical calculation results,verifying the accuracy of the proposed *** influence of the load/mass-spring’s moving speed on the dynamic deflections of SSTBS were *** has several critical speeds under a moving load/*** vertical acceleration incurred by a change in the vertical speed of SSTBS due to the movement of mass-spring and the centrifugal acceleration produced by the movement of massspring on the vertical curve generated by SSTBS vibration could not be neglected.