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MR 댐퍼를 이용한 이중파형 충격가속도 재현을 위한 충격시험기 설계해석
이규섭(G.S.Lee),구형욱(H.W.Koo),설창원(C.W.Shul),김태형(T.H. Kim),양명석(M.S. Yang) 대한기계학회 2014 대한기계학회 춘추학술대회 Vol.2014 No.11
The main shape of impulsive acceleration by the undersea explosion is composed of the positive and negative half sine shaped acceleration, so called the double shape impulsive acceleration. Generally, the first positive acceleration has the higher peak and shorter period and the second negative acceleration has the lower peak and longer period. The impact test equipment should be able to reconstruct the shape of the acceleration in order to estimate the safety and stability of the equipments installed in the ship. The design goal is to make simplify the complex structure due to the various shapes of the impulsive acceleration by using the controllable damping force of MR damper.
이중 충격 발생 기능을 갖는 대형 고중량 충격시험장치의 동력학적 설계
강민식(M. S. Kang),설창원(C. W. Shul),김태형(T. H. Kim),양명석(M. S. Yang),송원길(W. G. Song),이규섭(G. S. Lee) 대한기계학회 2014 대한기계학회 춘추학술대회 Vol.2014 No.11
Naval shipboard components encounter mechanical shock from a variety of sources. Components must be designed and tested accordingly to ensure reliability under possible shock pulses. This study concerns on dynamic design of a large and heavy dual shock generation system that will be used for reliability test of naval shipboard components. This is required to generate specific shock time history. Especially, the desired shock consists of a very high amplitude and very short period half-sine shock followed by an exponentially decaying harmonic shock of relatively longer period. Base on analysis of the dynamic characteristics of the given shock history, we proposed a sequential design procedure to determine spring and damping coefficients of the generation system. Feasibility of the proposed method was verified along with some simulation results.