MR Insert를 이용한 구조물의 응력파 저감

Stress Wave Reduction of Structures Using MR Inserts

  • 강병우 (인하대학교 대학원 기계공학과) ;
  • 김재환 (인하대학교 공과대학 기계공학과) ;
  • 최승복 (인하대학교 공과대학 기계공학과) ;
  • 김경수 (인하대학교 공과대학 선박해양공학과)
  • 발행 : 2001.07.01

초록

In this paper, stress wave propagation characteristics of MR(Magneto-rheological) inserts are experimentally investigated. Generally, stress waves of structures such as warships or submarines are induced by shock waves from underwater explosion. Their fatal effects on the shipboard equipments or structures damage the performance of warships. But, such a problem can be solved by controlling the stress waves propagating through structures by means of MR inserts. MR insert consists of two aluminum layers and MR fluid filled in between. Two piezoceramic disks are embedded on the host plate as a transmitter and a receiver of stress waves. Pulse waves are generated by the transmitter and they reach to the receiver through the MR insert. Permanent magnet and magnetic coil are used to produce magnetic field at the MR insert. In the presence of magnetic field, MR particles are arranged in chains parallel to the magnetic field such that the transmitted stress waves are reduced. Attenuation of stress waves is experimentally investigated.

키워드

참고문헌

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