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      저자 : Dianchao Wang (검색결과 2 건)
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      • KCI등재

        An experimental study of vibration control of wind-excited high-rise buildings using particle tuned mass dampers

        Zheng Lu,Dianchao Wang,Sami F. Masri,Xilin Lu 국제구조공학회 2016 Smart Structures and Systems, An International Jou Vol.18 No.1

        A particle tuned mass damper (PTMD) system is the combination of a traditional tuned mass damper (TMD) and a particle damper (PD). This paper presents the results of an experimental and analytical study of the damping performance of a PTMD attached to the top of a benchmark model under wind load excitation. The length ratio of the test model is 1:200. The vibration reduction laws of the system were explored by changing some system parameters (including the particle material, total auxiliary mass ratio, the mass ratio between container and particles, the suspending length, and wind velocity). An appropriate analytical solution based on the concept of an equivalent single-unit impact damper is presented. Comparison between the experimental and analytical results shows that, with the proper use of the equivalent method, reasonably accurate estimates of the dynamic response of a primary system under wind load excitation can be obtained. The experimental and simulation results show the robustness of the new damper and indicate that the damping performance can be improved by controlling the particle density, increasing the amount of particles, and aggravating the impact of particles etc.

      • KCI등재후보

        Study on the damping mechanisms of a suspended particle damper attached to a wind turbine tower

        Chenzhi Ma,Zheng Lu,Dianchao Wang,Zixin Wang 한국풍공학회 2021 Wind and Structures, An International Journal (WAS Vol.33 No.1

        Intensive attention has been given to mitigating the dynamic responses of wind turbine towers (WTs) under wind and seismic excitations to ensure their safety and serviceability. This study details the damping mechanisms of a suspended particle damper (suspended PD) on the vibration control of a horizontal-axis WT. This damper combines the benefits of a tuned mass damper (TMD) and fixed PD, and can be effective without an external damping system. It therefore is a more practical solution for the vibration control of a WT. In this study, a finite element WT is built, and two damper systems with a TMD and suspended PD are modeled and compared. Ground motions and strong lateral winds are applied as external excitations to the operational and parked turbines, respectively. A full factorial study using a statistical method is conducted to determine the interaction effects of key parameters of the suspended PD. Results show that the damping effectiveness of a suspended PD is not sensitive to the external damping system under specific parameters, and it can be effective in detuned cases. Finally, a comparison between the optimal TMD and suspended PD on the vibration control of a WT is performed. The comparative results indicate that the performance of the suspended PD is considerably more robust than the TMD in wind-seismic excitations.

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