Vibration reduction in pump piping system using flexible joints and a rigid disk (investigation of straight-line piping)

Yasuhiro Bonkobara, Takahiro Kondou, Shuji Shiraki, Yuichiro Sakamoto

Research output: Contribution to journalArticlepeer-review


A vibration reduction method that involves installing two flexible joints in series has been found to be useful for countermeasures against structure-borne sound in pump piping system. However, it has the practical difficulty that the pipe's vibration mode must be measured many times for determining the optimum location of flexible joints. Therefore, we newly propose the technique using two flexible joints and a rigid disk in order to improve the practicality of the previous method. In the present method, two flexible joints are first installed anywhere on the piping near the pump, and a rigid disk is then mounted on the piping between the pump and the flexible joint. Then, the pipe vibration can be easily reduced by just adjusting the location of the rigid disk without measuring the pipe's vibration mode. In this paper, the influence of underwater sound is neglected for simplify and the effectiveness of the present method in reducing vibration in straight-line piping is investigated analytically and experimentally. The results of the numerical analyses and experiments confirm that the present method is excellent in terms of usefulness and can achieve the vibration reduction effect comparable to the previous method.

Original languageEnglish
Pages (from-to)2232-2239
Number of pages8
JournalNihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C
Issue number769
Publication statusPublished - Sept 2010

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering


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