Journal of Northeastern University Natural Science ›› 2016, Vol. 37 ›› Issue (8): 1122-1126.DOI: 10.12068/j.issn.1005-3026.2016.08.013

• Mechanical Engineering • Previous Articles     Next Articles

Analysis of Flow-induced Vibration of Fluid Conveying Pipe with Elastic Support

ZHAO Qian-li, SUN Zhi-li, CHAI Xiao-dong, TONG Cao   

  1. School of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, China.
  • Received:2015-05-12 Revised:2015-05-12 Online:2016-08-15 Published:2016-08-12
  • Contact: ZHAO Qian-li
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Abstract: The flow-induced vibration of cantilevered fluid-conveying pipes with elastic support was analyzed by differential transformation method (DTM). Firstly, the motion equation was non-dimensionalized, then, the recurrence relation among each derivative was derived by DTM. Furthermore, the former four dimensionless frequencies and the general expression for mode shapes were obtained without consideration of fluid flow. On this basis, the relationship between frequency and flow velocity, elastic coefficient was worked out, and the critical velocity and stability condition were investigated simultaneously. DTM was verified to be of high accuracy and practicability by comparison and analysis. Besides, DTM could be referred when support format for pipes are designed.

Key words: fluid conveying pipe, fluid-structure interaction vibration, differential transformation method, elastic support, stability

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