The effect of different fluid accelerations on the stability of curved pipes conveying fluid

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Journal of Vibration and Shock ›› 2015, Vol. 34 ›› Issue (15) : 168-174.

HU Yujia Li Haigang

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Abstract

A dynamic model of an extensible curved pipe with an arbitrary initial configuration was established in an arc coordinate system and its numerical simulation was processed afterwards. A new independent variable was introduced to solve the boundary conditions in order to obtain the natural frequencies of the curved pipes conveying fluid based on the differential quadrature method (DQM) and partitioned matrix method. The effect of three fluid accelerations on the stability of the pipes conveying fluid was discussed. It can be found that, with the increasing fluid velocities, the difference in the first natural frequencies of pipes with complex configuration becomes more significant under the assumption of three different fluid accelerations. However, for the regular pipes, the effect of the fluid acceleration on natural frequency is insignificant.

Key words

curved pipe conveying fluid / DQM / natural frequency / fluid acceleration

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HU Yujia Li Haigang. The effect of different fluid accelerations on the stability of curved pipes conveying fluid[J]. Journal of Vibration and Shock, 2015, 34(15): 168-174

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