Modal analysis on transverse vibration of axially moving roller chain coupled with lumped mass  

作　　者：许立新 杨玉虎 常宗瑜 刘建平 

机构地区：[1]School of Mechanical Engineering,Tianjin University [2]College of Engineering,Ocean University of China

出　　处：《Journal of Central South University》2011年第1期108-115,共8页中南大学学报（英文版）

基　　金：Project(50605060) supported by the National Natural Science Foundation of China;Project(20050056058) supported by the Research Fund for the Doctoral Program of Higher Education of China;Project(06YFJMJC03300) supported by the National Science Foundation of Tianjin,China

摘　　要：The modal characteristics of the transverse vibration of an axially moving roller chain coupled with lumped mass were analyzed.The chain system was modeled by using the multi-body dynamics theory and the governing equations were derived by means of Lagrange's equations.The effects of the parameters,such as the axially moving velocity of the chain,the tension force,the weight of lumped mass and its time-variable assign position in chain span,on the modal characteristics of transverse vibration for roller chain were investigated.The numerical examples were given.It is found that the natural frequencies and the corresponding mode shapes of the transverse vibration for roller chain coupled with lumped mass change significantly when the variations of above parameters are considered.With the movement of the chain strand,the natural frequencies present a fluctuating phenomenon,which is different from the uniform chain.The higher the order of mode is,the greater the fluctuating magnitude and frequency are.The modal characteristics of the transverse vibration of an axially moving roller chain coupled with lumped mass were analyzed. The chain system was modeled by using the multi-body dynamics theory and the governing equations were derived by means of Lagrange＇s equations. The effects of the parameters, such as the axially moving velocity of the chain, the tension force, the weight of lumped mass and its time-variable assign position in chain span, on the modal characteristics of transverse vibration for roller chain were investigated. The numerical examples were given. It is found that the natural frequencies and the corresponding mode shapes of the transverse vibration for roller chain coupled with lumped mass change significantly when the variations of above parameters are considered. With the movement of the chain strand, the natural frequencies present a fluctuating phenomenon, which is different from the uniform chain. The higher the order of mode is, the greater the fluctuating magnitude and frequency are.

关 键 词：roller chain modal analysis transverse vibration lumped mass 

分 类 号：O327[理学—一般力学与力学基础]