2024-03-28T23:16:47Z
https://u-ryukyu.repo.nii.ac.jp/oai
oai:u-ryukyu.repo.nii.ac.jp:02001562
2022-10-31T00:50:53Z
1642837622505:1642837855274:1642837873116
1642838403551:1642838406845
一様流中における二次元角柱の風直角方向応答の理論的解析
A Theoretical Analysis of Cross-Wind Response of Two-dimensional Square Cylinder in Uniform Flow
天野, 輝久
福島, 弘志
川井田, 英之
Amano, Teruhisa
Fukushima, Hiroshi
Kawaida, Hideyuki
open access
two-dimensional square cylinder
vortex-induced oscillation
galloping
wake-oscillator
frequency locking
mass-damping parameter
The self-excited oscillation has become a major concern in wind resistent design of high-rise buildings. In this study, for the wake behind a two-dimensional square cylinder in uniform flow, proposed is a non-linear equation of motion which has a Rayleigh-type damping and a hardening spring. The influences of mass ratio, the linear term of the aerodynamic damping and the coefficient relating to Magnas effect affecting on the frequency lock-in and the stability diagram are discussed through the approximate periodic solutions for the coupled equations of motions of the cylinder and the wake. Furthermore, the responses of the cylinder and the unsteady forces are analyzed numerically through the Runge-Kutta method applying a seventh degree polynominal for the stationary forces. The results on the responses and the unsteady force have shown good agreements with the experimental data. As a consequence, it is concluded that the proposed model is useful to understand the mechanism of the interaction of the vortex-induced oscillation and galloping.
紀要論文
琉球大学工学部
1996-09
jpn
departmental bulletin paper
VoR
http://hdl.handle.net/20.500.12000/1429
http://hdl.handle.net/20.500.12000/1429
https://u-ryukyu.repo.nii.ac.jp/records/2001562
0389-102X
AN0025048X
琉球大学工学部紀要
52
41
50
https://u-ryukyu.repo.nii.ac.jp/record/2001562/files/No52p41.pdf