Vortex-induced vibration of a circular cylinder with nonlinear restoring forces at low-Reynolds number

Cheng Zhi; Lien Fue-Sang; Yee EugeneChen Guang

首页> 外文期刊>Ocean engineering >Vortex-induced vibration of a circular cylinder with nonlinear restoring forces at low-Reynolds number

【24h】

Vortex-induced vibration of a circular cylinder with nonlinear restoring forces at low-Reynolds number

机译：Vortex-induced vibration of a circular cylinder with nonlinear restoring forces at low-Reynolds number

获取原文

获取原文并翻译 | 示例

掌桥外文数据库（机构版） >>

开具论文收录证明 >>

文献代查 >>

页面导航

摘要
著录项
相关主题

摘要

The numerical simulation of two-dimensional flows around an elastically-mounted circular cylinder on a linear/quadratic spring configuration at low-Reynolds number (Re) is conducted in order to study the vortex -induced vibration (VIV) of the system. The extent of Re used in this study range from 50 to 150 inclusive. The data obtained from the numerical simulations are used to investigate the impact of the nonlinearity in the spring configuration on the VIV response of the dynamical system. The equivalent natural frequency for a circular cylinder supported elastically on a linear/quadratic spring is derived and found to depend on the square root of the maximum amplitude of the transverse displacement. The range of Re associated with the initial branch of the response is increased (extended) and the upper and lower branches are suppressed (almost disappearing when the hardening nonlinearity is sufficiently strong) for an elastically-mounted cylinder on a linear/quadratic spring configuration compared to that for the same cylinder supported elastically on a linear spring. The detailed characteristics (e.g., vortex shedding modes, amplitude and oscillation frequency of the transverse displacement, etc.) of the lock-in range and the transition out of this range for the VIV system as a function of increasing Re is studied using power spectrum, phase portrait and dynamical mode decomposition analysis. The information obtained from the analysis is synthesized in order to investigate the different physical mechanisms and phenomena appearing in the VIV system and how these are linked to the underlying vortex shedding and amplitude response regimes (initial branch, upper branch, desynchronization branch) of the dynamics of the fixed (stationary) and elastically-mounted cylinder.

著录项

来源
《Ocean engineering》 |2022年第5期|113197.1-113197.21|共21页
作者
Cheng Zhi; Lien Fue-Sang; Yee EugeneChen Guang;
展开▼
作者单位

Univ Waterloo;

Cent South Univ;

展开▼
收录信息
原文格式 PDF
正文语种英语
中图分类
关键词
Dynamic mode decomposition; Low-Reynolds number flows; Nonlinear restoring forces; Vortex-induced vibration; Wake modal analysis;

Vortex-induced vibration of a circular cylinder with nonlinear restoring forces at low-Reynolds number

摘要

著录项

相关主题

期刊订阅