• Journal of Advanced Marine Engineering and Technology
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• 제36권4호
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• pp.490-496
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• 2012

본 연구의 목적은 바지선에 의해 발생하는 해상풍력발전기의 충격손상을 최소화 시키기 위한 것이다. 충격해석은 상용유한요소해석 프로그램인 ANSYS LS-Dyna를 통하여 분석하였다. 바지선속을 변화시켜 다양한 상태의 하중케이스를 고려하였고 충격방지고무의 비선형성을 고려한 시간이력해석을 수행하였으며 변형률 에너지, 전체 변형량, 플라스틱 변형률, 내부충격에너지, 영구손상된 변형량 등을 검토하였다. 충격속도에 변화에 따른 영구변형을 확인한 후 자연고무, 복합고무, 네오프렌 등의 고무시험 물성치로부터 구한 Mooney-Rivlin 상수를 적용하여 적절한 충격방지고무의 두께를 제안하였다. 본 연구를 통하여 구조물의 두께와 충격방지고무의 두께비에 대한 경향을 파악할 수 있으며 구조물의 설계에 적용할 수 있다.

• 소성∙가공
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• 제3권1호
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• pp.84-96
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• 1994

Simulation of 3 dimensional large irregularly shaped stamping process by a dynamic approach, based on an explicit time integration scheme, has been shown to be highly efficient and robust in comparison to traditional, implicit, quasi-static ones. The objective of the work is to evaluate the results from explicit code in application to deep drawing of rectangular cup and stamping of automotive front fender, in which deformation, force, thickness distribution are calculated. The method of predicting spring back and formability by and explicit code are suggested and applied to the processes.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2008년도 춘계학술대회 논문집
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• pp.217-219
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• 2008

A new experimental model for determining drawbead forces, which modifies the dieface of Nine's experimental model, is introduced and the better validity of the drawbead opening and restraining forces of new model than those of Nine's is demonstrated. While Nine's model considers a blank holding force as one of forming variables, new model excludes it by removing blank holder in the dieface. The comparison of the strains found by FEM simulation of automotive fender draw forming process with those measured in a formed panel recommends the new model for accurate drawbead forces.

• 한국해안·해양공학회논문집
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• 제22권6호
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• pp.423-428
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• 2010

본 계류안정성 해석은 광양만 부두의 포항제철 제품 및 고철부두에 대한 적정 선박을 선정하는 방법의 하나로서 수행되었다. 계류안정성 해석을 위해서는 우선 제품부두에 정박하는 기준이 되는 대상선박을 선정하여 각 선박의 운동특성을 파악하고, 이것을 바탕으로 각 대상 선박의 유체력을 계산한 후 파랑, 바람 및 조류를 고려하여 안벽에 계류된 선박의 계류안정성해석을 수행하였다. 이를 통해 광양 제품부두에서의 계류안정성을 보장하는 적정한 선박 선정기준을 개선하고자 하였다.

• 한국해양공학회지
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• 제23권6호
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• pp.53-60
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• 2009

Recently, since there are several problems in space, the infra-structure and the facilities in the contiguity of the existing harbors due to the trend of enlarging the container capacity of the large container vessel, a special floating platform named as the Mobile Harbor has been proposed conceptually as an effective solution of those problems. Two kinds of hull shapes, a conventional mono-hull type and a catamaran type, are proposed as midway feeders to transfer containers to the harbor on land from a large container ship on near shore. In this study, the motion response and mooring analysis are carried out for comparing the global performance of two types of Mobile Harbor. Robot arm mooring facility specially is devised and newly tried to use for the safe fixation of a large container ship and the Mobile Harbor on near shore. It would be expected for this comparison study to give a guideline to design the efficient hull form for a midway loader.

• 대한간호학회지
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• 제23권4호
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• pp.617-630
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• 1993

Factors related to health promotion activities and quality of life in Korean women with arthritis have not been clearly identified. Predictors of health promotion might be identified that will enhance the well - being of this group. Accordingly, the findings of the study will contribute additional information about the relationship between health promotion and quality of life and will add to the research on quality of life of individuals with a leading cause of disability--arthritis. The purpose of the study was to examine the relationship of selected background factors (years of illness, perceived severity of illness, uncertainty in illness), perceived self- efficacy, and health promoting behaviors to the quality of life of Korean women with arthritis. A cross - sectional descriptive design was used in this study to investigate relationships among the variables of interest. The sample was composed of 96 women who had arhtrits and visited large university hospital in Seoul for regular check up or pre-scription of medication. The purpose of a descriptive correlational design was to determine the absence or presence of relationships among variables that were measurable (Polit & Hungler, 1981, p.147). The design of this study was appropriate because it yielded answers to the research questions and hypotheses regarding the relationships among the model variables. the Questionnaire contained demographic information, translated Mishel Uncertainty in illness Scale-Community form (MUIS-C) (Mishel, 1987), translated and modified Disease Course Graphic Scale(DCGS) which was developed by Braden (1990), translated Sherer. et al.’s General Self-Efficacy Scale (1982), The Health -Promoting Lifestyle Profile (HPLP), developed by Walker, Sechrist, and Fender (1987) and traslated to Korean by Ha, and quality of life was measured by Face Scale (Andrew, 1976). Several steps of verification for the translation process were carefully conducted. Data analysis included descriptive correlational statistics and multiple regression techniques. Health promotion was the only contributor to pre-dict quality of life. Results showed that enabling cognitive perceptual factor (self-efficacy) mediates the disruptive force (uncertainty in ill-ness) on achieving a health promoting self- help behavior. The findings of this study also indicated that illness - related variable of severity of illness was mediated by health promotion, which buffered it's impact on quality of life.