质量阻尼比对圆柱体流致振动捕能效率的影响  

Effects of mass ratio and damping ratio on the energy capture efficiency of cylinder flow-induced vibration

作　　者：白旭[1] 韩传煜 孙海[2] BAI Xu;HAN Chuanyu;SUN Hai(School of Naval Architecture and Ocean Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China;College of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, China)

机构地区：[1]江苏科技大学船舶与海洋工程学院,江苏镇江212003 [2]哈尔滨工程大学航天与建筑工程学院,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2020年第9期1274-1280,共7页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(51879125,51609053);江苏省“六大人才高峰”高层次人才资助项目(2018-KTHY-033);江苏省自然科学基金项目(BK20170575).

摘　　要：针对水下流致振动式捕能装置最优捕能制造参数的设计,建立了水流-振子-载荷耦合运动模型,推导了尾流振子模型,计算不同质量比、阻尼比条件下圆柱振子在不同约化速度下的振动状况,进而模拟出不同工况下的捕能效率。依据模拟结果拟合分析,提出捕能效率最大时,阻尼比随质量比变化的拟合公式。研究结果表明:捕能效率与质量比成负相关,但在不同质量比条件下存在最佳阻尼比。振子在质量比为1.1,阻尼比为0.148时,取最大值14.50%。拟合公式能较好预测最优阻尼比,对模拟及实际工程的设计制造具有参考价值。In this paper,a flow-oscillator-load coupled motion model is established to obtain optimal energy capture manufacturing parameters for the design of a flow-induced vibration-type energy capture device.The wake oscillator model is derived and used to calculate the vibration status of the cylindrical oscillator under different mass ratios and damping ratios and at different reduced velocities,and then energy capture efficiencies in different working conditions are simulated.A fitting formula for the damping ratio variation with the mass ratio when the energy capture efficiency is maximum is proposed based on the fitting analysis of the simulation results.The results show that the energy capture efficiency is negatively correlated with the mass ratio,but there is an optimal damping ratio under different mass ratios.When the mass ratio is 1.1 and the damping ratio is 0.148,the maximum energy capture efficiency of the oscillator is 14.50%.The fitting formula can better predict the optimal damping ratio and has good reference value for design and manufacture in simulation and practical engineering.

关 键 词：流致振动 涡激振动 质量比 阻尼比 单自由度 刚性 捕能效率 最优捕能效率 

分 类 号：P743.1[天文地球—海洋科学]