Finite element analysis of fluid conveying pipeline of nonlinear vibration response

Gongfa Li, Wentao Xiao, Guozhang Jiang, Jia Liu

COMPUTER MODELLING & NEW TECHNOLOGIES 2014 18(4) 37-41

College of Machinery and Automation, Wuhan University of Science and Technology, Wuhan 430081, China

Fluid filled pipe system was widely used in the city water supply and drainage, water power, chemical machinery, aerospace, marine engineering and the nuclear industry and other fields, it was play an important role for improving the living standards of the nation and the national economic strength. Pipe conveying fluid was easy to design and manufacture, according to the characteristics of fluid conveying pipe, transformed the axial vibration mathematical model of the fluid conveying pipe, which considerate the fluid solid coupling to the beam element model for two nodes. Using Lagrangian interpolation function, the first order Hermit interpolation function and the Ritz method to obtain the element standard equation, and then integrated a global matrix equation, obtained the response of conveying fluid pipe with the Newmark method and Matlab. With the Matlab to simulate the axial motion equation of the conveying fluid pipe, study the response of the system in two aspect of fluid pressure disturbance and the fluid velocity disturbance, and the simulation results are analysed, which provides theoretical support for the work of fluid conveying pipes.