流体在管道中流动时管道的自振特性研究  

Analysis of the Self-vibration on Pipe Conveying Fluid

作　　者：张瑾瑾[1] 赵子龙[1] 

机构地区：[1]太原科技大学,太原030024

出　　处：《太原科技大学学报》2010年第4期330-333,共4页Journal of Taiyuan University of Science and Technology

基　　金：太原科技大学博士科研启动基金资助项目(200614)

摘　　要：基于三维弹性理论及欧拉线性方程,采用位移-压力格式有限元方法,得到附加矩阵。通过叠加附加矩阵把流固耦合结构振动问题化成普通的结构振动问题,建立了流体在管道中流动时结构振动的有限元方程,研究了流体在管道中流动时结构的自振特性,重点研究了流体速度对管道自振频率的影响。研究表明,管道各阶自振频率随着流体速度的递增呈递减的趋势。Based on the three-dimensional theory of elasticity and the linear Euler equations,using the displacement-pressure finite element method,the additional matrixes are obtained.By adding them to the corresponding terms of the structural vibration equation,the fluid-solid coupling structural vibration problem is changed into the general structural vibration problem.On this basis,the finite element equations of the pipe conveying fluid are established.Its self-vibration character has been investigated,and the influence of the fluid speed on the self-vibration frequency is emphatically investigated.The results show that the natural frequencies decreases with increasing of the fluid velocity.

关 键 词：流固耦合 管道振动 自振频率 

分 类 号：O327[理学—一般力学与力学基础]