分层流调频液体阻尼器对弹性支撑平台的振动控制试验研究  

Experimental Study on Vibration Control of Multi-layer and Multi-modal Platform Structure with Layered Tuned Liquid Damper

作　　者：窦朋 王志东[1] 凌宏杰 徐晓森 DOU Peng;WANG Zhidong;LING Hongjie;XU Xiaosen(School of Naval Architecture and Ocean Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,China;Marine Equipment and Technology Institute,Jiangsu University of Science and Technology,Zhenjiang 212003,China)

机构地区：[1]江苏科技大学船舶与海洋工程学院,镇江212003 [2]江苏科技大学海洋装备研究院,镇江212003

出　　处：《中国造船》2023年第6期175-191,共17页Shipbuilding of China

基　　金：国家自然科学基金项目(52101314)。

摘　　要：基于6自由度运动模拟平台,研究了分层流调频液体阻尼器(LTLD)在不同外激励振幅、分层流体积比和深长比条件下对弹性支撑平台结构振动的控制效果,分析了该阻尼器的表面波和界面波在不同振幅、频率和分层流体积比下的晃荡特性。研究表明:界面波形成的剪切层耗散了流体运动的能量,使小振幅激励下的LTLD阻尼性能优于传统的调频液体阻尼器(TLD),耦合系统的最大水平位移从21.03 mm降低到了19.92 mm,振动控制性能提升了5.28%,基频漂移降低了27.78%;在Ro=0.5时,LTLD在稳态阶段激发的界面波运动频率与解析解吻合,出现第二减振频率点。Based on six degrees of freedom motion simulation platform,the vibration control effect of the layered tuned liquid damper(LTLD)on the elastic supporting structural platform under different external excitation amplitudes,stratified flow volume ratios,and water depth ratios was studied.It is shown that the shear layer formed by interface waves dissipates the kinetic energy of the fluid,making the damping performance of the LTLD superior to the traditional single-layer liquid TLD under small amplitude excitation.The maximum horizontal displacement of the coupling system is reduced from 21.03 mm to 19.92 mm,the vibration control performance is improved by 5.28%,and the fundamental frequency drift is reduced by 27.78%.When R_o=0.5,the excited interface wave motion frequency in the steady state is consistent with the analytical expression,and the second damping frequency will appear.

关 键 词：液舱晃荡 流固耦合 数值模拟 分层流 

分 类 号：U656.6[交通运输工程—港口、海岸及近海工程]