理想塑性非线性弹簧支撑刚性圆柱涡激振动响应

艾尚茂;孙丽萍

振动与冲击 ›› 2010, Vol. 29 ›› Issue (11) : 21-25.

PDF(1870 KB)
PDF(1870 KB)
振动与冲击 ›› 2010, Vol. 29 ›› Issue (11) : 21-25.
论文

理想塑性非线性弹簧支撑刚性圆柱涡激振动响应

  • 艾尚茂 1;孙丽萍 1
作者信息 +

Vortex induced vibration response of a rigid cylinder supported by perfectly plastic nonlinear spring

  • AI Shang-mao 1; SUN Li-ping 2
Author information +
文章历史 +

摘要





应用尾流振子模型以及弱耦合算法的二维CFD数值方法,首次模拟了理想塑性非线性弹簧支撑刚性圆柱的涡激振动响应。CFD数值模拟与尾流振子经验模型预报结果一致显示:响应幅值超出非线性弹簧的极限位移后产生突变而迅速达到峰值,然后又逐渐变小;非线性弹簧情况下幅值峰值要低于线性,但出现在较低的流速。CFD数值方法还模拟到非线性弹簧支撑柱振动频率开始锁定泄涡频率,当振幅达到峰值后,随之锁定于静水固有频率附近。



Abstract

The vortex induced vibration response of a rigid cylinder supported by perfectly plastic nonlinear spring in a fluid flow was simulated for the first time. Wake-oscillator prediction model and 2D CFD method based on loose coupling algorithms were adopted. The results of above two methods all showed that, vibration amplitude jumps to a maximum value when cylinder movement exceeds the nonlinear spring limited displacement,then decreases with velocity increasing. The response peak value for nonlinear spring case is higher than linear spring,but at the lower flow velocity. As the same time,the simulation of CFD presented that vibration frequency for synchronization is close to vortex shedding frequency at the beginning,and then switch to above the natural frequency in still water when the amplitude reaches a peak value.

关键词

尾流振子模型 / 弱耦合算法 / 非线性弹簧 / 涡激振动

Key words

Wake-oscillator model / loose coupling algorithms / nonlinear spring / vortex induced vibration

引用本文

导出引用
艾尚茂;孙丽萍 . 理想塑性非线性弹簧支撑刚性圆柱涡激振动响应[J]. 振动与冲击, 2010, 29(11): 21-25
AI Shang-mao;SUN Li-ping . Vortex induced vibration response of a rigid cylinder supported by perfectly plastic nonlinear spring[J]. Journal of Vibration and Shock, 2010, 29(11): 21-25

PDF(1870 KB)

Accesses

Citation

Detail

段落导航
相关文章

/