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평판의 진동에 의한 소리의 방사 및 철도차량 실내소음 해석에의 응용
金寬柱,李奉魯 弘益大學校 科學技術硏究所 1996 科學技術硏究論文集 Vol.7 No.1
The problem of sound radiation by vibrating plates is based on understanding the radiation characteristics of structures. In fact, many practical structures can be modelled by rectangular, uniform, flat plates. Such examples are walls and floors of buildings, parts of vehicle shells, and floors of railway vehicles, and so forth. In this paper, the relation between vibration and noise of the simple rectangular plate are analyzed by using of analytical method and numerical method. However, in the case of the railway vehicles, it is not easy to analyze the sound radiation phenomena by means of theoretical method. Hence, the sound pressure fields at arbitrary point inside the cabin is evaluated by using of commercial software SYSNOISE.
김관주,문흥준,이봉노 한국자동차공학회 1995 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1995 No.11_1
In recent years, the problems of noise and vibration are critical issues in order to reduce the weight of internal combustion engine components It is found that the bending, torsional and lateral vibration of crankshaft are the main causes of engine noise and vibration problems. Therefore it is necessary to identify the vibration behavior of crankshaft. In this paper, the vibration analysis of hollow crankshaft was carried out. The torsional vibration characteristics of hollow crankshaft were analyzed and compared with those of same size solid crankshaft in respect of equivalent mass. and stiffness by using [- DEAS. The natural frequencies and mode shapes of both crankshafts are measured by impact hammer test using LMS CADA-X system.<br/>
홍기남 ( Ki Nam Hong ),이봉노 ( Bong No Lee ),한상훈 ( Sang Hoon Han ) 한국안전학회(구 한국산업안전학회) 2011 한국안전학회지 Vol.26 No.2
This paper presents a new simple two-dimensional frame finite element able to accurately estimate the load-carrying capacity of reinforced concrete beams flexurally strengthened externally bonded fiber reinforced polymer (FRP) strips and plates. The proposed analysis model considers distributed plasticity with layer-discretization of the cross-sections and the bond-slip behavior of epoxy layer. The proposed model is used to predict the load-carrying capacity and the applied load-midspan deflection response of RC beams subjected to bending loading. Numerical simulations and experimental measurements are compared based on numerous tests available in the literature and published by different authors. The numerically simulated response agree remarkably well with the corresponding experimental results. Thus, the proposed model is suitable for efficient and accurate modeling and analysis of flexural strengthening of RC beams with externally bonded FRP sheets/plates and for practical use in design-oriented parametric studies.