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김관주(Kim Kwanju),유남식(Yoo Namsik) 한국철도학회 1998 한국철도학회 학술발표대회논문집 Vol.- No.-
In this study, system analysis for a train vehicle with an articulated bogie frame adopted in TGV and TGV-K system is performed. System analysis is carried out as follows. First, modal analysis of each subsystem is performed to obtain the natural frequencies and mode shapes. Then modal analysis of a whole vehicle is performed to obtain the potential interaction between the subsystems. Finallyforced response analysis, such as driving point mobility, is performed to obtain the dynamic response of specific points.
유한요소법과 경계요소법을 이용한 수중에서의 탄성구조물의 진동모드해석 및 모델링 기법
김관주,오상륜 한국소음진동공학회 2000 소음 진동 Vol.10 No.2
This paper shows hot to model the submerged elastic structures and adequate analysis tools for modal behavior when using finite element and boundary element method. Four different cases are reviewed depending on the location of the water and air. First case is that structures are filled with air and water is located outside. Second case is opposite to case one. These cases are solved by direct approach using collocation procedure. Third case is that water is located both sides of structures. Last case is that air is located both sides. These cases are solved by indirect approach using variational procedure. As analysis tools harmonic frequency sweep analysis and eigenvalue iteration method are selected to obtain the natural frequencies of vibrating submerged structures depending on the cases. Results are compared with closed form solutions of submerged spherical shell.
김관주,서명원 대한기계학회 1991 大韓機械學會誌 Vol.31 No.4
새로운 차종이 시장에 데뷔하기 위해서는 일반적으로 상품 기획에서부터 설계, 홍보까지의 수 백명의 인원과 4∼5년의 개발시간이 집중 투입된다. 자동차 회사로서는 신차를 개발 판매하기 위하여 개발, 설비를 포함한 거액의 투자를 필요로 하고 그나마 성공의 보장은 없다. 주행시 쾌적한 차량, 충돌 사고시의 승객보호 등의 고객의 요구와 강화되는 배기 규제, 환경 소음 대응, 차량개발 기간의 단축을 실현하기 위하여 컴퓨터에 의한 해석기술에 대한 요구는 증대하며, 또한 다양화해진다. 본 글에서는 이러한 개발 단계에서 중요한 한 부분인 해석 분야의 업무를 설명 하고 각 업무에 대하여 간략히 언급하기로 한다.
김관주(Kim Kwanju),박진규(Park Jinkyu) 한국철도학회 2000 한국철도학회 학술발표대회논문집 Vol.- No.-
This study is about predicting the interior pressure level of the korean high speed train using ray acoustic method. The motor car and the motor and passenger cabin are investigated under the environment of passing open countryside and inside tunnel of 350 ㎞/hr. Calculated sound levels are compared with the proposed sound levels and suggestions about the transmission loss values of isolating panels inside motor car and the guide lines of allowed sound power limit of motor equipments are provided. Results of TP1 car show calculated interior sound level is below the proposed values for both cases of open countryside running and inside tunnel. Since ray acoustic method calculated only air borne noise component, real sound level of the motor car may be higher than prediction. Passenger cabins of TM1, TM5 show higher sound level than the proposed values, so window method was carried out to find the contribution of each panel components and point out the remedy of transmission path. Reduction of sound power of motor equipments should be condisered at the same time.
金寬柱,梁侖錫 弘益大學校 科學技術硏究所 1999 科學技術硏究論文集 Vol.10 No.1
Wheel-rail noise is normally classified into three categories : rolling, squeal and impact noise. In this paper, rolling noise caused by the irregularity between a wheel and rail is analysed as follows: The irregularity between the wheel and rail is assumed as combination of sinusoidal profiles. Wheel-rail contact stiffness is linearized by using Hertzian contact theory, and then contact force between the wheel and rail is calculated. Vibration of the rail and wheel is calculated theoretically by receptance method and FEM depending on the geometry of wheel or rail for the frequency range of 100~5000Hz, important for noise generation. The radiation caused by those vibration is computed by BEM. To verify this analysis tools, rolling noise is calculated by preceding analysis steps using typical roughness data and it is compared with experimental rolling noise data. This analysis tools show reasonable results and used for the prediction of KTX rolling noise.