http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
초대형 부유식 해상공항의 파도에 의한 진동응답특성 해석
이현엽(Hyun-Yup Lee),전영기(Young-Ki Jeon),신현경(Hyun-Kyung Shin) 한국해양공학회 1996 韓國海洋工學會誌 Vol.10 No.4
The vibration due to progressive ocean waves is analyzed for a typical footing-type offshore airport platform. The platform is modelled as a spring-supported Euler beam and buoyancy change due to wave is considered as excitation force, under the assumption that the wave propagates without distortion by the structure. The results show that the natural frequencies of this structure are distributed very closely and are little affected by boundary conditions and that the response charateristics due to ocean waves are quite different according to the wave frequency. In this study, the wave frequencies are divided into three regions; the resonance region at which the response is governed by the resonance between the natural mode at the wave frequency and the corresponding modal component of the wave excitation force, the bending governed region at which the response is governed by the bending stiffness, and the spring(buoyancy) governed region at which the response is governed by the spring constant and therefore is same as the incident wave form.
해양구조물의 피로해석기법에 대한 검토 및 전산프로그램의 개발
이현엽(Hyun-Yup Lee) 한국해양공학회 1996 韓國海洋工學會誌 Vol.10 No.2
For fatigue analysis of offshore structures, existing methods have been reviewed and a computer code has been developed on PC. As methods to estimate the probability distribution of the fatigue stress, three methods(the deterministic method, the stochastic method, and the simplified method) are used in this code, to choose the appropriate method according to the situations. This code estimates damage ratios, fatigue lives, and probabilities of fatigue failure considering scatterness of SN-data, based on linear damage rule and SN-curves. Also, allowable stress for the design extreme wave can be calculated by the simplified method.
박태인,이현엽,Park, Tae-In,Lee, Hyun-Yup 한국마린엔지니어링학회 1979 한국마린엔지니어링학회지 Vol.3 No.1
Alignment of marine engine shafting generally implies a judicious slope alignment of supporting bearings in order to achieve acceptable values of bearing reactions and shaft stresses for all deformation conditions of hull. Authors developed a computer program, which computes the bearing reaction forces, the bearing reaction influence numbers and etc, using quadruple integration method. And the results of calculation for a 26,000 DWT steam container carrier were in good agreements with those of foreign shipyard. Also they introduced the optimization technique of slope alignment combined technical economic basis, and as a result of comparing characteristics of shafting in case of straight alignment whit those in case of slope alignment, the latter was found to be much better than the former.