%0 Journal Article
%T 质量比对二自由度圆柱涡激振动影响的计算研究
%A 章大海
%A 王文颢
%A 石凡奇
%A 郝木明
%J 中国石油大学学报(自然科学版)
%D 2017
%R 10.3969/j.issn.1673-5005.2017.03.021
%X 利用Fluent平台的用户自定义程序(UDF)以及动网格模型,实现圆柱运动方程的一种迭代求解算法,对二自由度弹性支承圆柱体在一定约化速度下的涡激响应进行数值模拟;探讨不同质量比对涡激响应升力的影响。研究表明:采用的迭代求解算法能对弹性支承圆柱涡激振动做出合理预测;质量比对涡激响应的升力影响显著,不仅低质量比圆柱产生的振幅更大,低质量比较高质量比能产生更大的升力系数,且升力相对横向位移的“相位突跳”现象对应的约化来流速度U*更大;圆柱运动轨迹从最初的弧型转变至“8”字型,而后“8”字型逐渐消失并转变为水滴形。</br>An iterative solution algorithm was developed to solve the cylindrical motion equation using Fluent UDF codes and dynamic mesh method, through which the numerical simulation of the vortex-induced vibration (VIV) of a two degree of freedoms (2-DOF) elastically mounted cylinder at a certain reduced velocity. And the influence of different mass ratios on the VIV lift was analyzed. It is found that the iterative solution algorithm can reasonably predict the VIV of elastically mounted cylinder. And the influence of the VIV lift is significant. Compared to high mass ratio cylinders, low mass ratio cylinders can excite higher amplitude, larger lift coefficient, and the phase angle reverse corresponds with a larger reduced velocity U*. The trajectory of the cylinder transfers from the initial arc figure to "8" figure, and finally to a water drop figure
%K 涡激振动 流固耦合 质量比 数值模拟&lt
%K /br&gt
%K vortex-induced vibration solid-fluid interaction mass ratio numerical simulation
%U http://zkjournal.upc.edu.cn/zgsydxxb/ch/reader/view_abstract.aspx?file_no=20170321&flag=1