Abstract
In this paper, the stress response characteristics of a straight hydraulic pipe subjected to random vibrations were studied. The motion equation of the straight hydraulic pipe subjected to random vibration was established by utilizing the finite element method (FEM), and considering the fluid-structure interaction (FSI). The discrete analysis method was employed to solve the motion equation of the straight hydraulic pipe. The effects of different parameters, including the external excitation, fluid velocity, fluid pressure, and the pipe's structural parameters on the stress response of the straight hydraulic pipe were investigated. The numerical results showed that the maximum mean square values of the pipe stress occurred at the support points of the pipe; the maximum mean square value of the pipe stress increased with an increase in the random acceleration variance, pipe wall thickness, pipe inner diameter, and fluid pressure and decreased with an increase in the pipe length and fluid velocity. The experimental results agreed well with the numerical results, demonstrating the accuracy of the motion equation of the straight hydraulic pipe subjected to random vibration.
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