TY - GEN
T1 - Damping characteristics of multi-tiered tank structure separated by a horizontal plate with an opening
AU - Toyoda, Makoto
AU - Hamamoto, Yukan
AU - Yasuzawa, Yukitaka
PY - 2011/12/1
Y1 - 2011/12/1
N2 - 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.
AB - 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.
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M3 - Conference contribution
AN - SCOPUS:84871487270
SN - 9781618392596
T3 - 18th International Congress on Sound and Vibration 2011, ICSV 2011
SP - 2372
EP - 2379
BT - 18th International Congress on Sound and Vibration 2011, ICSV 2011
T2 - 18th International Congress on Sound and Vibration 2011, ICSV 2011
Y2 - 10 July 2011 through 14 July 2011
ER -