Modal analysis of T-shaped pipes based on a fluid-solid interaction model

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (22) : 117-123.

ZHAO Jiang1,2，YU Jianfeng1,2，LOU Qi1,2

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Abstract

The vibration of a T-shaped pipe caused by fluid flow was investigated. The natural frequency of the T-shaped pipe under the action of fluid was analyzed based on the two-way fluid-solid coupling. The effects of fluid pressure, fluid velocity and fluid density on the modality of the pipeline were studied in consideration of the two-way fluid-solid coupling. The stress and deformation of the pipeline under the effect of fluid were analysed, and the vibration harmonic responses of the T-shaped pipe were investigated. The results show that the modal analysis based on the two-way fluid-structure coupling can accurately reflect the modality of the pipeline under the action of internal fluid; the fluid pressure has the greatest influence on the natural frequency of the pipeline; the vibration response of the pipeline reaches peaks at the excitation frequency of 800 Hz and 1 060 Hz.

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T-shaped pipe / modal analysis / finite element analysis / harmonic response analysis

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ZHAO Jiang1,2，YU Jianfeng1,2，LOU Qi1,2. Modal analysis of T-shaped pipes based on a fluid-solid interaction model[J]. Journal of Vibration and Shock, 2019, 38(22): 117-123

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