摘要
针对海流能转换装置的振动杆开展质量比实验研究,对质量比分别为0.38和0.85的振动杆在循环水槽中进行实验.实验结果表明:振动杆受来流影响发生了涡激振动现象,且表现出一些共性,随折合速度增加,振动频率增加,振动幅值减小,当折合速度较小时,涡激振动为单一模态,随折合速度增加,逐渐转换为多模态;质量比对振动幅值有影响,质量比小的振动杆在中低流速下的振幅大于质量比大的振动杆,但高流速下,其幅值小于质量比大的振动杆;质量比的变化对无量纲的振幅频率影响较小,两条无量纲振动频率曲线相互靠近,随折合速度增加,无量纲振动频率由1.0增至2.0以上.
Based on the vertical circulation flume,the mass ratio of the vibrating rod of the ocean current energy conversion device was 0.38 and 0.85,respectively.The experimental results show that the vortex⁃induced vibration phenomenon occurs in all the vibration bars under the influence of the inflow flow,which shows some common characteristics.For example,with the increase of the reduced velocity,the vibration frequency increases and the vibration amplitude decreases.When the reduced velocity is small,the vortex⁃induced vibration becomes a single mode,and gradually transforms into a multi⁃mode with the increase of the reduced velocity.The mass ratio has a certain effect on the vibration amplitude.The vibration rod with a small mass ratio has a greater amplitude than that with a large mass ratio at medium and low flow rates,but its amplitude is smaller than that with a large mass ratio at high flow rates.The change of mass ratio has little effect on the amplitude and frequency of the dimensionless vibration.The two dimensionless vibration frequency curves are close to each other,and the dimensionless vibration frequency increases from 1.0 to over 2.0 with the increase of conversion velocity.
作者
端木玉
李镇欣
蔡伟杰
DUANMU Yu;LI Zhen-xin;CAI Wei-jie(School of Naval Architecture and Ocean Engineering,Guangzhou Maritime University,Guangzhou Guangdong 510725,China)
出处
《广州航海学院学报》
2023年第1期59-66,共8页
Journal of Guangzhou Maritime University
基金
广州市教育局高校科研项目(202032786)
广州市科技计划项目(202002030424)
广东省普通高校特色创新类项目(2019KTSCX123)
广东省普通高校认定类科研项目(2020KTSCX107)。
关键词
涡激振动
海流能发电装置
质量比
水槽实验
Vortex⁃induced vibration
current energy harvesting device
mass ratio
water channel experiments
