| 刘卓,刘昉*,燕翔,张军,卜同胜.高阻尼比低质量比圆柱涡激振动试验研究[J].实验力学,2014,29(6):737~743 |
| 高阻尼比低质量比圆柱涡激振动试验研究 |
| Experimental Study of Cylinder Vortex Induced Vibration under High Damping Ratio and Low Mass Ratio Conditions |
| 投稿时间：2014-01-04 修订日期：2014-04-29 |
| DOI：10.7520/1001-4888-14-002 |
| 中文关键词: 涡激振动 试验研究 高阻尼比 低质量比 变阻尼 |
| 英文关键词:vortex induced vibration experimental investigation high damping ratio low mass ratio variable damping |
| 基金项目:国家自然科学基金创新研究群体科学基金(51021004);国家自然科学基金青年科学基金项目(51209158) |
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| 中文摘要: |
| 针对圆柱的涡激振动问题，设计开发了高性能循环水槽与超声位移传感器，研究了高阻尼比、低质量比条件下，弹性支撑的刚性圆柱的涡激振动变化规律。结果表明：(1)高阻尼比条件下，振幅主要受独立参数阻尼比、质量比的影响;低质量比条件下，振动频率随流速增大而增大，“锁定区间”较高质量比范围扩大。(2)高阻尼比、低质量比条件下，阻尼的增大会导致振幅减小且“锁定区间”变窄;但振动频率在“锁定区间”内变化趋势一致。(3)高阻尼比、低质量比有利于涡激振动的能量转化，但阻尼不可过大，否则振幅与“锁定区间”均变小，影响电能转化。 |
| 英文摘要: |
| In order to study vortex induced vibration of cylinder, a high-performance circulating water sink and ultrasonic displacement sensor were developed. The variation of cylinder vortex induced vibration was experimentally investigated for an elastically mounted rigid cylinder under high damping ratio and low mass ratio conditions. Results reveal that (1) When damping ratio is high, the amplitude of cylinder is primarily influenced by independent parameters including damping ratio and mass ratio separately; when mass ratio is low, the vibration frequency increases with the flow velocity; the range of “synchronization” is expanded distinctly under the condition of low mass ratio compared with that under the condition of high mass ratio; (2) in the case of high damping ratio and low mass ratio, the amplitude is decreased and the range of “synchronization” is narrowed with increasing damping; however, as flow rate increases, the frequency variation presents consistent trend within the range of “synchronization”; (3) Low mass ratio and high damping ratio are conducive to energy conversion of vortex induced vibration; but damping should not be large unduly, otherwise, the amplitude and the range of “synchronization” will reduce, resulting in energy conversion reduction. |
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