Dynamic Modeling of Semi-active Squeeze Mode MR Damper for Structural Vibration Control

구조물의 진동 제어를 위한 압착식 MR 감쇠기의 동적 모델링

  • 허광희 (건양대학교 건설시스템공학과) ;
  • 전준용 (충남대학교 토목공학과)
  • Received : 2008.06.18
  • Accepted : 2008.12.15
  • Published : 2009.03.30

Abstract

Normally in order to build a semi-active control system equipped with MR damper, the dynamic modeling of the damper is required to numerically predict its dynamic damping force and also its behavioral characteristics. For the dynamic modeling of the MR damper, this paper attempts to predict and evaluate its dynamic behavior by applying specifically both a power model and a Bingham model. Dynamic loading tests were performed on the squeeze type of damper specially designed for this research, and force-displacement hysteresis loops confirmed the effectiveness of the damper as a semi-active control device. In the meantime, in order to evaluate the effectiveness of each model applied, the model parameter for each model was identified. On the basis of the parameter, we derived the error ratio of the force-velocity relationship curve and the dynamic damping force, which was contrasted and compared with the experimental results of the squeeze type of damper. Finally, the squeeze type of MR damper developed in this research was proved to be valid as a semi-active control device, and also the evaluation of the two dynamic models showed they were working fine so that they were likely to be easily utilized to numerically predict the dynamic characteristics of any dampers with MR fluid as well as the squeeze type of MR damper.

Acknowledgement

Supported by : 한국과학재단

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