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배수룡,정우진,함일배,김두기,이헌곤 한국소음진동공학회 1999 소음 진동 Vol.9 No.1
Resilient mounting is effective measures to reduce the structure-borne noise and radiated noise for many applications. The acoustic stiffness (frequency-dependent stiffness) of resilient mounts is an important parameter required in order to model vibration isolation with high accuracy. It is general to use measurement method for obtaining acoustic stiffness of complex resilient mounts under static preload. In this paper, the principles of measuring acoustic stiffness were described and the developed test apparatus was introduced. Also, the feasibility of the test apparatus is illustrated by measurement results of a resilient mount.
SEA 기법을 이용한 보강 원통형 셸의 수중방사소음 해석
배수룡,전재진,이헌곤 한국소음진동공학회 1993 소음 진동 Vol.3 No.2
The vibration generated by the machinery on board is transmitted to the hull and into the water. At the early design stage, the prediction of the hull vibration and the radiated noise level is very important to reduce their levels. In this study, SAE(Statistical Energy Analysis) technique is applied to predict structureborne noise level of the hull considering fluid loading. Rayleigh integral is applied to predict the radiated noise level. The results of comparision between the predictions and measurements for the reinforced cylindrical shell have shown good agreements.
동조질량감쇠기를 이용한 탄성지지 래프트 시스템의 구조소음 저감
배수룡(Soo Ryong Bae),정우진(Woo Jin Jung),함일배(Il Bae Ham),한현희(Hyun Hee Han),손성완(Sung Wan Son) 한국소음진동공학회 2017 한국소음진동공학회 논문집 Vol.27 No.6
Underwater radiated noise of submarine is key performance of the stealth capability. To reduce underwater radiated noise of submarines, raft systems can be installed in the submarines. Tuned mass damper can be used to reduce structureborne noise of the raft which is supported by resilient mounts. In this study, tuned mass dampers is installed in a raft, the structureborne noise reduction performance of the raft is presented by experimentally and analytically. As results of test, the structurebrone noise reduced at all mount of the raft.