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- 저자 : 방제성(Je-Seung Bang) (검색결과 9 건)
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프로세스 통합도구를 활용한 용접대차프레임 피로내구해석의 자동화
방제성(Je-Sung Bang),한승호(Seung-Ho Han),임채환(Chae-Whan Rim),이광기(Kwang-Ki Lee),이광순(Kwang-Soon Lee),송시엽(See-Yeob Song) 한국철도학회 2005 한국철도학회논문집 Vol.8 No.5
For the design of welded bogie frame, the concept of multidisciplinary engineering activities, i.e. static, fatigue and dynamic analysis, has been applied, in which the sharing of design parameters related with each analysis and the collaboration of the working parts in charge should be fulfilled. However, in spite of these necessities, the multidisciplinary engineering activities couldn't be performed in practice due to lack of the automation of the required analysis. In this paper, an automation of fatigue durability analysis of welded bogie frame according to UIC-Code was proposed by using the ModelCenter, which enables to integrate the several tools for the fatigue durability analysis, i.e. I-DEAS, ANSYS and BFAP, and to perform iterative analysis works in relation to the geometrical change of transom support bracket. Besides, the wrapping programs to control I/O-data and interfaces of these tools were developed. The developed automation technique brings not only significant decreasing man-hour required in the durability analysis, but also providing a platform of the multidisciplinary engineering activities.
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실무업무 분석을 통한 용접대차프레임 피로내구해석의 자동화
한승호(Seung Ho Han),방제성(Je Sung Bang),임채환(Chae Whan Rim),이광기(Kwang Ki Lee),이광순(Kwang Soon Lee),송시엽(See Yeob Song) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.11
The automation of fatigue durability analysis for welded bogie frame was proposed by using the ModelCenter, which enables to integrate several engineering tools for the fatigue durability analysis, i.e. I-DEAS, ANSYS and BFAP, and to perform iterative analysis and process related with UIC-code. Additionally, the wrapping programs are developed to control input/output files which contain the information of design parameters and execution files at each step of activity. To perform the parametric study, the position of transom support bracket is changed within allowable range in an aspect of structural design. The developed automation technique brings not only significant decreasing man-hour required in the fatigue durability analysis, but also providing a framework for the multidisciplinary engineering activities or reliability based optimization.
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3차원 경계요소법과 전선 유한요소 해석의 연성을 통한 전선 유탄성 해석
김경환(Kyong-Hwan Kim),방제성(Je-Sung Bang),김용환(Yonghwan Kim),김승조(Seung-Jo Kim) 대한조선학회 2012 대한조선학회 논문집 Vol.49 No.4
This paper considers a fully coupled 3D BEM-FEM analysis for the ship structural hydroelasticity problem in waves. Fluid flows and structural responses are analyzed by using a 3D Rankine panel method and a 3D finite element method, respectively. The two methods are fully coupled in the time domain using a fixed-point iteration scheme, and a relaxation scheme is applied for improve convergence. In order to validate the developed method, numerical tests are carried out for a barge model. The computed natural frequency, motion responses, and time histories of stress are compared with the results of the beam-based hydroelasticity program, WISH-FLEX, which was thoroughly validated in previous studies. This study extends to a real-ship application, particularly the springing analysis for a 6500 TEU containership. Based on this study, it is found that the present method provides reliable solutions to the ship hydroelasticity problems.
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임형수(Hyung-Soo Lim),최범석(Bum-Seog Choi),박무룡(Moo-Ryong Park),황순찬(Soon-Chan Hwang),박준영(Jun-Young Park),서정민(Jeong-Min Seo),방제성(Je-Seung Bang),강도원(Do-Won Kang),윤의수(Eui-Soo Yoon) 한국유체기계학회 2017 한국유체기계학회 논문집 Vol.20 No.6
One dimensional design was conducted to develop the drive turbine for supercritical CO₂ power system. Designed drive turbine was 2 MW class and 1-stage radial turbine. Specific speed analysis and specific diameter analysis were conducted to estimate the basic specification of turbine, i.e. efficiency, rpm, power, rotor diameter. To manage the thrust force of drive turbine, turbine rotor and pump impeller were back to back layed out. Rotational speed was selected considering the specific speed condition of turbine and pump. One dimensional design was conducted to determine flow angle and dimension of drive turbine. Also, to analyze the characteristic of loss in turbine rotor, it was classified by the source of loss, i.e. incidence loss, passage loss, trailing edge loss, exit energy loss, tip clearance loss and windage loss. One dimensional analysis results were used to calculate amount of losses and these values were compared in design and off design point. In this analysis, passage loss and tip clearance loss were dominant for all operation region. At the lower expansion ratio condition, the loss was increased, and it was stabled more than expansion ratio 3. Even the loss analysis was conducted with simple theoretical equations, the characteristic of loss was identified well and these information can be used as a reference in minimizing loss in turbine rotor.
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