Flow-induced oscillations of a square cylinder due to interference effects
Flow-induced oscillations of a square cylinder due to interference effects
复制标题
由于干涉效应引起的方圆柱体的流动引起的振动
DOI：
10.1016/j.jsv.2006.05.003
复制
发表时间：
1994
影响因子：
4.7
通讯作者：
V. Sreedharan
中科院分区：
文献类型：
--
作者：
B. Gowda;V. Sreedharan
本文给出了弹性方柱(测试圆柱，侧面尺寸B)在刚性方形圆柱(干扰圆柱，侧面尺寸b)作用下的流致振动的测量结果。使用了b/b=0.5、1.0、1.5和2.0的比率。考虑了测试圆柱体和干扰圆柱体的各种相对位置，包括串联、并排和交错排列(在所考虑的所有位置中，干扰圆柱体从未位于测试圆柱体的上游)。结果表明，在一定的b/b比和相对位置组合下，测试圆柱体的振荡幅度几乎是无干扰情况下的3倍。在某些其他条件下，振动被完全抑制。结合前人的相关研究，对观测到的特征进行了讨论。流动可视化结果是通过使用(A)固定测试圆筒和(B)振动测试圆筒来获得的，以对观察到的特征提供解释。
Measurements of the flow-induced oscillations of a spring-mounted square cylinder (test cylinder, side dimension B) due to the presence of a rigid square cylinder (interfering cylinder, side dimension b) are presented. Ratios of b/B=0.5, 1.0, 1.5 and 2.0 have been used. Various relative positions of the test cylinder and the interfering cylinder, in tandem, side-by-side and staggered arrangements are considered (in all of the positions considered, the interfering cylinder was never upstream of the test cylinder). The results show that under certain combinations of the b/B ratio and the relative position, the test cylinder can experience oscillatory amplitudes almost three times those observed for the no-interfering case. Under certain other conditions, the vibrations are completely suppressed. The observed features are discussed with reference to earlier related studies. Flow visualisation results are obtained by using (a) stationary test cylinder and (b) oscillated test cylinder, to provide an explanation for the observed features.