Numerical Method For The Vibration Of Main Steam-Pipe In Power Plant

On the basis of the Hamilton's principle, the element mass matrix, stiffness matrix, and damping matrix caused by Coriolis force of the finite method for the conveying fluid tubes were educed in the paper. With the dynamic equation of the piping, the dynamic characters of the simple tube and the main steam piping is analysed. The effective law on the frequence and modal of vibration due to the fluid velocity, the fluid press and the number of elements was obtained. The frequence and modal of main stream piping were analysed under the condition of different velocity of stream and the valve taken as the centralizing mass. This paper also gives the responses of steady state under the condition that the frequency of forced vibration is 4Hz,8Hz,12Hz respectively. The analysed result shows that accords with the actual result. ZhaoHexiang ( Mechanic Design & Theory)Directed by Prof.Peng Zhenzhong & Prof.Wang Zhangqi...