Title :
Identification of nonlinearity of flow-induced vibration for structures having nonlinear property by using wavelet transform
Author :
Subekti ; Kobayashi, Yukinori ; Hoshino, Yohei ; Emaru, Takanori
Author_Institution :
Grad. Sch. of Eng., Hokkaido Univ., Sapporo, Japan
Abstract :
This paper presents a nonlinear system identification for an elastically supported rigid cylinder in a cross flow. The cylinder is supported by a pair of elastic cantilever beams and a wire that adds nonlinearity to the system. Time history response of the vortex-induced vibration is measured experimentally. Joint time-frequency analysis based on wavelet analysis is applied to identify the nonlinear characteristics of the system. The time-frequency analysis is employed to the observed signal, and characteristics of the fluid-structure nonlinear coupled vibration are observed.
Keywords :
beams (structures); cantilevers; elasticity; flow; structural engineering; time-frequency analysis; vibrations; wavelet transforms; cross flow; elastic cantilever beams; elastically supported rigid cylinder; flow-induced structural vibration; fluid-structure nonlinear coupled vibration; nonlinear property; nonlinear system identification; nonlinearity identification; time history response; time-frequency analysis; vortex-induced vibration; wavelet analysis; wavelet transform; History; Nonlinear systems; Structural beams; Time factors; Time frequency analysis; Time measurement; Vibration measurement; Wavelet analysis; Wavelet transforms; Wire; Flow-Induced Vibration; Identification; Nonlinearity; Wavelet Transform;
Conference_Titel :
ICCAS-SICE, 2009
Conference_Location :
Fukuoka
Print_ISBN :
978-4-907764-34-0
Electronic_ISBN :
978-4-907764-33-3
