Free vibration analysis of multi-span pipe conveying fluid with dynamic stiffness method

Bao Hui Li, Hang Shan Gao, Hong Bo Zhai, Yong Shou Liu, Zhu Feng Yue

科研成果: 期刊稿件文章同行评审

74 引用 (Scopus)

摘要

By taking a pipe as Timoshenko beam, in this paper the original 4-equation model of pipe conveying fluid was modified by taking the dynamic effects of fluid into account. The shape function that always used in the finite element method was replaced by the exact wave solution of the modified four equations. And then the dynamic stiffness was deduced for the free vibration of pipe conveying fluid. The proposed method was validated by comparing the results of critical velocity with analytical solution for a simply supported pipe at both ends. In the example, the proposed method was applied to calculate the first three natural frequencies of a three span pipe with twelve meters long in three different cases. The results of natural frequency for the pipe conveying stationary fluid fitted well with that calculated by finite element software Abaqus. It was shown that the dynamic stiffness method can still hold high precision even though the element's size was quite large. And this is the predominant advantage of the proposed method comparing with conventional finite element method.

源语言英语
页(从-至)666-671
页数6
期刊Nuclear Engineering and Design
241
3
DOI
出版状态已出版 - 3月 2011

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