Vibration analysis of viscoelastic damping material attached to a cylindrical pipe by added mass and added damping

Daiki Yano, Satoshi Ishikawa, Katsunori Tanaka, Shinya Kijimoto

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

Vibration of pipes and cylindrical shells leading to noise and damage is an important engineering problem in plant systems and air conditioners, among others. To attenuate such vibration, a viscoelastic material is attached to pipes as a damping material. To predict the vibration reduction effect in detail, three-dimensional finite-element analysis is usually conducted considering the characteristics of the viscoelastic material, but such analysis requires considerable computation time. To overcome this problem, this study proposes added mass and added damping to address the effects of vibration of the damping material on the vibration of a pipe. By this method, one-dimensional analysis can be performed. To assess the validity of the proposed method, numerical results for the vibration of a pipe fitted with silicone obtained using the proposed method are compared with measurements from a hammering test and numerical results from three-dimensional analysis. The computational results obtained using the proposed method agree very well with the measurements and the three-dimensional numerical results. Furthermore, it is found that the vibration of the pipe is attenuated by not only the damping of the viscoelastic material but also the effect of dynamic behavior similar to that of a dynamic absorber.

Original languageEnglish
Pages (from-to)14-31
Number of pages18
JournalJournal of Sound and Vibration
Volume454
DOIs
Publication statusPublished - Aug 18 2019

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Acoustics and Ultrasonics
  • Mechanical Engineering

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