Experimental investigations on the performance of a novel semi-active tuned liquid column damper
This paper presents the results of an experimental performance investigation,which was conducted by the authors on the novel semi-active tuned liquid column damper(S-TLCD).The damper consists,similar to the passive TLCDs,of a U-shaped tank filled with a Newtonian fluid,such as water.The tuned parameters of the damper enable a phase shifted oscillation of the liquid mass with respect to the motion of the main structure,leading to restoring and damping forces.The S-TLCD provides,different from passive TLCDs,manoeuvrable panels and valves,which can change the cross-sectional area of the tank.In this way,they can influence the flow velocity and control in a semi-active manner both the natural frequency and the damping ratio of the damper.During the experimental investigation,the authors attached a small-scale model of the S-TLCD on a test structure and conducted shaking table tests.The amount of vibration reduction of the test structure was examined to determine the performance of the S-TLCD.The results show that its frequency adaptation capability allows the S-TLCD to remain tuned and hold a continuing high-level performance.Superior to passive control devices,which lose their efficacy due to temperature,degradation and aging induced detuning,the S-TLCD reached during the conducted experiment a 78%improvement of the vibration reduction compared to the detuned state.Besides tuning effects,the paper discusses also further possible detrimental effects on the performance,which can be evoked by the geometric factors.The geometric factors define the liquid mass portion,which is participating actively to the vibration control.A change of the cross-sectional area of the tank influences also the geometric factors.However,the experimental results show that the frequency tuning is decisive for the S-TLCD efficacy and alleviates the performance deterioration caused by the geometric factors.
Semi-active structural control tuned liquid column damper semi-active tuned liquid column damper shaking table tests
O.Altay S.Stemmler D.Abel S.Klinkel
Department of Civil Engineering,RWTH Aachen University,Aachen,Germany Department of Mechanical Engineering,RWTH Aachen University,Aachen,Germany
国际会议
The 7th World Conference on Structural Control and Monitoring(7WCSCM)(第七届结构控制与监测世界大会)
青岛
英文
1054-1063
2018-07-22（万方平台首次上网日期，不代表论文的发表时间）