Experimental study on control performance of tuned liquid column dampers considering different excitation directions

Altunışık, Ahmet Can; Yetişken, Ali; Kahya, Volkan

doi:10.1016/j.ymssp.2017.09.021

Cited by 47 publications

(14 citation statements)

References 12 publications

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“…In addition, the experimental natural frequencies are shown in function of the nominal pressure, P n , using boxplots and, as it can be observed, the experimental natural frequencies tend to be slightly larger than the theoretical values. This agrees with that observed by Altunişik et al 27 A straight line was fitted to the mean values of the identified natural frequencies, as shown in Figure 8.The corresponding values are given in Equation (12).…”

Section: Ptlcd Configurationsupporting

confidence: 89%

Structural control of a grandstand using a semi‐active pressurized tuned liquid column damper considering effects of passive crowds

Riascos

Marulanda

Thomson

2019

Struct Control Health Monit

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Summary Varying passive crowds can cause considerable changes in the dynamic properties of civil structures, such as sport venues. The effectiveness of passive control systems for the reduction of vibrations in these structures is limited as the dynamic properties of the structure change depending on the occupancy level and postures. Hence, a semi‐active system is proposed for reducing structural vibrations regardless of the off‐tuning due to passive crowd effects. This paper describes the experimental implementation of a semi‐active control strategy for a pressurized tuned liquid column damper (PTLCD) on a grandstand‐type steel structure. Additionally, an analytical model is proposed for the human–structure–damper system, and numerical results are compared with those obtained experimentally. Only the effects of passive anthropic behavior were considered, and results show that individuals, when sitting, produce more damping in the main structure than when they are standing. Overall, the semi‐active PTLCD had a satisfactory performance for the different configurations considered, achieving reductions in peak and root mean square acceleration of up to 74% and 57% with respect to the grandstand without the control system.

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Section: Ptlcd Configurationsupporting

confidence: 89%

Structural control of a grandstand using a semi‐active pressurized tuned liquid column damper considering effects of passive crowds

Riascos

Marulanda

Thomson

2019

Struct Control Health Monit

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“…Zhang et al [8] compared the numerical of a shear frame by performing a shaking table and real-time hybrid simulation. Altunışık et al [9] determined the dynamic characteristics and dynamic behaviors of the shaking table experiments by forming a model containing a calibrated liquid column damper. Fırat Alemdar [10] compared the deformation results obtained by both shaking table experiments and finite element analysis under bi-axial earthquake loads of reinforced concrete bridge columns and examined the plastic deformations.…”

Section: Introductionmentioning

confidence: 99%

A Calibration Technique for Bi-axial Shake Tables with Stepper Motor

et al. 2022

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Shaking tables are frequently used to determine the dynamic behavior of structures in the laboratory environment. In order to obtain realistic results in experimental studies, table response and performance should be consistent with the desired motion. In this multidisciplinary study, an application of a new method for determining and calibrating the mechanical response of a developed bi-axial displacement controlled shake table according to the desired motion data is presented. The bi-axial shake table's electro-mechanical components consist of stepper motors, ball screw sets, linear ball bearings, and linear potentiometers positioned on both axes for displacement measurements. For the control and data acquisition (DAQ) unit of the shake table, an open-source electronic prototyping platform Arduino was used. From several experimental results, it was seen that, with the presented calibration method, harmonic and earthquake simulations could be achieved with a relative root mean square error (relative RMS error) of less than 5% for desired displacement-time histories.

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“…The most direct way for vibration suppression is to adopt structural vibration control devices, mainly including passive, semi-active and active control strategies [15][16][17][18]. Among the three methods, passive modes do not require additional power.…”

Section: Introductionmentioning

confidence: 99%

Structural responses suppression for a barge‐type floating wind turbine with a platform‐based TMD

Xie

Jin

et al. 2019

IET Renewable Power Generation

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As the ocean environment is more complex than the land environment, the offshore wind turbines especially the floating types generally suffer significant structural loads. In this study, in order to carry out the accurate simulation and analysis for the dynamic characteristics of a barge‐type floating wind turbine, a detailed turbine model including the complete drivetrain is constructed. Additionally, the structural responses of the wind turbine are mitigated by using a single‐degree of freedom tuned mass damper (TMD) system installed in the platform. In order to achieve the ideal response mitigation effect, a parametric study on the TMD configuration is carried out. Based on a new co‐simulation model combining multi‐body model and external control codes, the turbine model coupled with the TMD is then simulated under the combined wind and wave. The results demonstrate the effectiveness of the designed TMD on mitigating the structural responses of the barge‐type floating wind turbine.

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Experimental study on control performance of tuned liquid column dampers considering different excitation directions

Cited by 47 publications

References 12 publications

Structural control of a grandstand using a semi‐active pressurized tuned liquid column damper considering effects of passive crowds

Structural control of a grandstand using a semi‐active pressurized tuned liquid column damper considering effects of passive crowds

A Calibration Technique for Bi-axial Shake Tables with Stepper Motor

Structural responses suppression for a barge‐type floating wind turbine with a platform‐based TMD

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