Damping characteristics of multi-tiered tank structure separated by a horizontal plate with an opening

Makoto Toyoda, Yukan Hamamoto, Yukitaka Yasuzawa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Reliability of vibration analysis of structures in contact with water has been improved in recent years, whereas mechanism of damping due to fluid is not well understood and estimation method of damping due to fluid is not developed for most structures. However, widespread use of computational fluid dynamics is considered to facilitate clarifying the flow around a vibrating structure. Calculation technique such as coupling of fluid analysis and structure analysis is still time consuming and it is also not suitable for understanding the mechanism of damping. It is considered to be more useful to perform structure analysis and computational fluid dynamics separately. The authors have been developing a method to estimate damping due to fluid using computational fluid dynamics and finite element analysis of structures. Some excitation tests of a cylindrical tank separated by a horizontal plate with an opening were carried out in order to validate the damping estimation method. Simplified damping estimation method without utilizing CFD was also developed. Amplitude dependence, the effect of the size of an opening were investigated and compared with estimated results. Also, the possibility to increase damping by horizontal plate with an opening is discussed.

Original languageEnglish
Title of host publication18th International Congress on Sound and Vibration 2011, ICSV 2011
Pages2372-2379
Number of pages8
Publication statusPublished - Dec 1 2011
Event18th International Congress on Sound and Vibration 2011, ICSV 2011 - Rio de Janeiro, Brazil
Duration: Jul 10 2011Jul 14 2011

Publication series

Name18th International Congress on Sound and Vibration 2011, ICSV 2011
Volume3

Other

Other18th International Congress on Sound and Vibration 2011, ICSV 2011
CountryBrazil
CityRio de Janeiro
Period7/10/117/14/11

All Science Journal Classification (ASJC) codes

  • Acoustics and Ultrasonics

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  • Cite this

    Toyoda, M., Hamamoto, Y., & Yasuzawa, Y. (2011). Damping characteristics of multi-tiered tank structure separated by a horizontal plate with an opening. In 18th International Congress on Sound and Vibration 2011, ICSV 2011 (pp. 2372-2379). (18th International Congress on Sound and Vibration 2011, ICSV 2011; Vol. 3).