Considering the Coriolis force, Centrifugal force and migration force, a 14-equations model of fluid-structure interaction is established. Angle conversion matrix between different pipes and the transfer matrix algorithm for the fluid pressure wave non-reflected boundary condition are established, and then the models and algorithms were validated by numerical examples. Furthermore, the influence laws and characteristics of fluid parameters, boundary condition and angle between the two pipes on the pressure wave transmission characteristics and dynamic response are analyzed and summarized in detail. It is found that the " standing wave" phenomenon occurs due to FSI, which is larger when fluid and pipe attribute more similar; The density of the pressure wave spectrum diagram achieve maximum in rigid boundary, showing the more severity of coupled vibration; Several pressure wave resonance peaks are increased when the angle between different pipes appears as a result of the Burdon coupling, and this peaks are more easily influenced by the angle.
Li Shuai-jun;Liu Gong-min;Chen Hao.
Pressure wave propagation characteristics analysis in fluid-filled pipes with fluid–structure interaction[J]. Journal of Vibration and Shock, 2012, 31(24): 177-182
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