Complex Modal Analysis for the Time-Variant Dynamical Problem of Rotating Pipe Conveying Fluid  

作　　者：Lihua Wang Zheng Zhong 

机构地区：[1]School of Aerospace Engineering and Applied Mechanics,Tongji University,Shanghai,200092,P.R.China

出　　处：《Computer Modeling in Engineering & Sciences》2018年第1期1-18,共18页工程与科学中的计算机建模（英文）

基　　金：supported by National Natural Science Foundation of China(Project No.11572229);Shanghai Chenguang Plan(Project No.14CG18);Fundamental Research Funds for the Central Universities(Project No.22120180063).

摘　　要：A semi-analytical form of complex modal analysis is proposed for the time-variant dynamical problem of rotating pipe conveying fluid system.The complex mode superposition method is introduced for the dynamic analysis in the time and frequency domains,in which appropriate orthogonality conditions are constructed to decouple the time-variant equation of motion.Consequently,complex frequencies and modes of vibration are analytically formulated and the variations of frequencies and damping of the system are evaluated.Numerical time-variant example of rotating pipe conveying fluid illustrates the effectiveness and accuracy of this method.Furthermore,the proposed solution scheme is also applicable to other similar time-variant dynamical problems.

关 键 词：SEMI-ANALYTICAL form complex MODAL analysis time-variant DYNAMICAL PROBLEM ROTATING pipe CONVEYING fluid 

分 类 号：O24[理学—计算数学]