Performance of hybrid mass damper system applied to a 36‐storey high‐rise building

Nagashima, Ichiro; Maseki, Ryota; Asami, Yutaka; Hirai, Jun; Abiru, Hisanori

doi:10.1002/eqe.84.abs

Cited by 7 publications

(13 citation statements)

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“…The structure of electromagnetic dampers is different in various applications [1][2][3][4]. The electromagnetic damper is designed based on special hollow glass motor in this paper [5].The electromagnetic damper is suitable for special occasions, mainly used in spacecraft and space station rendezvous and docking mechanism.…”

Section: Introductionmentioning

confidence: 99%

Notice of Retraction: 3D Simulation of torque-speed characteristic for electromagnetic damper

Wang

Cui

2010

2010 International Conference on Computer Application and System Modeling (ICCASM 2010)

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The electromagnetic damper has a special rotor structure in this paper. First, three-dimensional models are built based on MagNet of Infolytic corporation. Secondly, according to the simulation results of the air-gap flux densities analyzed by means of sampling in static field, the 3D transient model has been simplified for no reason for the department of simulation model. Finally, the effects of magnetic pole-pairs of changes on the torque-speed characteristic are mainly researched. The analysis results show that the relationship of the torque-speed ratio with the magnetic pole is neither directly proportional nor inversely proportional. The substance of torque-speed characteristic affected by magnetic pole-pairs is changes of the amplitude of the fundamental component of the air-gap flux density.

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Section: Introductionmentioning

confidence: 99%

Notice of Retraction: 3D Simulation of torque-speed characteristic for electromagnetic damper

Wang

Cui

2010

2010 International Conference on Computer Application and System Modeling (ICCASM 2010)

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“…The vibration control method used here is fundamentally the same as that used for normal mechanical systems including large-scale ones, such as high-rise buildings2223. The whole experimental system was placed on an anti-vibration table having a natural frequency of about one second, and the resonator system of the silicon lever was placed on a rubber block in the vacuum chamber for greater vibrational isolation.…”

Section: Methodsmentioning

confidence: 99%

Feedback damping of a microcantilever at room temperature to the minimum vibration amplitude limited by the noise level

Kawamura

Kanegae

2016

Sci Rep

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Cooling the vibration amplitude of a microcantilever as low as possible is important to improve the sensitivity and resolutions of various types of scanning type microscopes and sensors making use of it. When the vibration amplitude is controlled to be smaller using a feed back control system, it is known that the obtainable minimum amplitude of the vibration is limited by the floor noise level of the detection system. In this study, we demonstrated that the amplitude of the thermal vibration of a microcantilever was suppressed to be about 0.15 pmHz−1/2, which is the same value with the floor noise level, without the assistance of external cryogenic cooling. We think that one of the reason why we could reach the smaller amplitude at room temperature is due to stiffer spring constant of the lever, which leads to higher natural frequency and consequently lower floor noise level. The other reason is considered to be due to the increase in the laser power for the diagnostics, which lead to the decrease in the signal to noise ratio determined by the optical shot noise.

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“…To obtain the modal wind load from the limited measured responses, it is necessary to estimate the unmeasured responses from the limited measured responses. For example, the displacement and velocity responses can be calculated from the acceleration response by numerical integration (Nagashima et al, 2001). The numerical integration, however, may not result in reliable results due to uncertainty during integration and the noise included in the measured acceleration responses.…”

Section: Modal Wind Load Identification By Inverse Analysismentioning

confidence: 99%

“…Nagashima et al (2001) presented a wind load estimation method for the evaluation of a hybrid mass damper installed on a 36‐story building. They derived an inverse estimation equation based on the linear coordinate transformation assuming that only the first few modes contribute significantly to the dynamic behavior of a building.…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of TMD under Typhoon Using System Identification and Inverse Wind Load Estimation

Kang

Kim

et al. 2012

Computer aided Civil Eng

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The typhoon behavior and performance of a tuned mass damper (TMD) are presented based on the system identification and the inverse modal wind load estimation. The TMD was installed on a 39‐story, 184.6‐m steel building located in Incheon, Korea with a monitoring system consisting of an anemometer, accelerometers, and internet‐based data logging system. On September 2, 2010, the building experienced the Kompasu Typhoon, in which the peak wind speed, measured by an anemometer installed on the roof floor, was 49.7 m/s. To analyze the behavior of the building during the typhoon, the dynamic properties of building and TMD are identified from the measured responses. The modal wind load is then inversely estimated from the TMD and building accelerations using a Kalman filter, and the vibration reduction performance of the TMD is evaluated. The analysis results show that the typhoon‐induced vibration was reduced significantly due to the installation of TMD.

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Performance of hybrid mass damper system applied to a 36‐storey high‐rise building

Cited by 7 publications

References 0 publications

Notice of Retraction: 3D Simulation of torque-speed characteristic for electromagnetic damper

Notice of Retraction: 3D Simulation of torque-speed characteristic for electromagnetic damper

Feedback damping of a microcantilever at room temperature to the minimum vibration amplitude limited by the noise level

Performance Evaluation of TMD under Typhoon Using System Identification and Inverse Wind Load Estimation

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