• Title/Summary/Keyword: 상용 최적설계 소프트웨어

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A Study for Design and Implementation of Open Source Software Maturity and Applicability Assessment Model(OSMAAM) for OSS Proliferation (오픈소스 소프트웨어 활성화를 위한 성숙도 및 적용성 평가 모델(OSMAAM)의 설계 및 구현에 관한 연구)

  • Jung, Yunjae;Oh, Seung Woon;Kim, Hyeong Chae;PARK, JIN HONG;Kim, Keun Dong
    • Informatization Policy
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    • v.20 no.1
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    • pp.85-109
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    • 2013
  • This study presents a model and its implementation methodology assessing not only maturity but also applicability in order to increase the practical usage of open source software(OSS). Since this model measures applicability which can not be assessed by the previous models, it is able to support users in many ways when they introduce OSS for the first time, replace commercial software with OSS, and compare OSS with commercial software. For the purpose of design and implementation of this model, we presented a methodology with 7 phases and conducted a survey to evaluate the appropriateness and reliability of the model. In addition, we proved the practical usability of the model by providing a practical example assessing maturity and applicability of OSS in the area of the infra category on the basis of the methodology. In the future, not only general users but also officers in charge of informatization will be able to select optimal OSS by using this model for industrial application. Therefore, the result of this research is expected to greatly contribute to OSS promotion policy.

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A Study on the Development of Integrated Folding Composite Wing Using Optimal Design and Multiple Processes (최적설계 및 다중공정을 적용한 일체형 접이식 복합재료 날개 개발 연구)

  • Lee, Jong-Cheon
    • Journal of Aerospace System Engineering
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    • v.12 no.3
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    • pp.70-78
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    • 2018
  • This research was carried out to develop an integrated folding wing made from carbon composite materials. Design requirements were reviewed and composite wing sizing was conducted using design optimization with commercial software. Three composite manufacturing processes including hot-press, pultrusion, and autoclave were evaluated and the most suitable processes for the integrated wing fabrication were selected, with consideration given to performance and cost. The determined manufacturing process was verified by two design development tests for selecting the design concept. Stiffness and strength of the composite wing were estimated through structural analyses. The test loads were calculated and static tests about design limit load and design ultimate load were performed using both wings. As a result, the evaluation criterions of the tests were satisfied and structural safety was verified through the series of structural analyses and testing.

Welding Technology for the Process Optimization by the Computer Code SYSWELD (SYSWELD를 이용한 용접 프로세스 제어 기술)

  • 이재경;이기훈
    • Journal of Welding and Joining
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    • v.15 no.1
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    • pp.36-45
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    • 1997
  • 용접 구조물에 대한 프로세스 제어를 위하여 매우 효과적인 수단이 될 수 있는 SYSWELD 소프트웨어의 이론적인 개념 및 응용 기술에 대하여 소개하였다. 전술한 바와 같이 SYSWELD는 일반적으로 알려져 있는 범용 열 및 구조해석 상용 Code와는 달리 야금학적 이론이 접목되므로써 이전에는 고려하기 곤란했던 제어 인자들에 대하여 보다 정확한 정보를 얻을 수 있기 때문에 용접 프로세스 분야에 매우 적합한 시뮬레이션 Code라고 판단된다. 이와 같이 수치해석 기술을 응용함으로써 연구기관에서는 제반 현상들에 대하여 실험적인 접근방법보다 보다 효과적으로 이해할 수 있게 되어 궁극적으로 이론적 발전 및 실용화를 이룰 수 있으며, 또한 산업체에서는 현업에서 발생하는 결함의 제어 및 구조물이나 프로세스의 최적 설계 방안을 수립하는 일이 가능하기 때문에, 현재 용접 분야에 대한 컴퓨터 시뮬레이션 응용 기술에 대하여 관심이 집중되고 있다. 이에 당사는 SYSWELD를 비롯하여 공학 분야의 유용한 상용 Code에대한 공급 및 기술 지원 뿐만 아니라 엔지니어링 능력을 갖추고 이와 같은 추세에 부응하고자 하는 노력중에 있는 바, 용접 시뮬레이션 응용 기술에 대한 현황을 소개하고자 하였으므로 참고가 되기를 바란다.

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A Study on Shape Optimum Design for Stability of Elastic Structures (탄성 구조물의 안정성을 고려한 형상최적설계)

  • Yang, Wook-Jin;Choi, Joo-Ho
    • Journal of the Computational Structural Engineering Institute of Korea
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    • v.20 no.1
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    • pp.75-82
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    • 2007
  • This paper addresses a method for shape optimization of a continuous elastic body considering stability, i.e., buckling behavior. The sensitivity formula for critical load is analytically derived and expressed in terms of shape variation, based on the continuum formulation of the stability problem. Unlike the conventional finite difference method (FDM), this method is efficient in that only a couple of analyses are required regardless of the number of design parameters. Commercial software such as ANSYS can be employed since the method requires only the result of the analysis in computation of the sensitivity. Though the buckling problem is more efficiently solved by structural elements such as a beam and shell, elastic solids have been chosen for the buckling analysis because solid elements can generally be used for any kind of structure whether it is thick or thin. Sensitivity is then computed by using the mathematical package MATLAB with the initial stress and buckling analysis of ANSYS. Several problems we chosen in order to illustrate the efficiency of the presented method. They are applied to the shape optimization problems to minimize weight under allowed critical loads and to maximize critical loads under same volume.

Multi-Objective Optimization of Flexible Wing using Multidisciplinary Design Optimization System of Aero-Non Linear Structure Interaction based on Support Vector Regression (Support Vector Regression 기반 공력-비선형 구조해석 연계시스템을 이용한 유연날개 다목적 최적화)

  • Choi, Won;Park, Chan-Woo;Jung, Sung-Ki;Park, Hyun-Bum
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.43 no.7
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    • pp.601-608
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    • 2015
  • The static aeroelastic analysis and optimization of flexible wings are conducted for steady state conditions while both aerodynamic and structural parameters can be used as optimization variables. The system of multidisciplinary design optimization as a robust methodology to couple commercial codes for a static aeroelastic optimization purpose to yield a convenient adaptation to engineering applications is developed. Aspect ratio, taper ratio, sweepback angle are chosen as optimization variables and the skin thickness of the wing. The real-coded adaptive range multi-objective genetic algorithm code, which represents the global multi-objective optimization algorithm, was used to control the optimization process. The support vector regression(SVR) is applied for optimization, in order to reduce the time of computation. For this multi-objective design optimization problem, numerical results show that several useful Pareto optimal designs exist for the flexible wing.

A Study on efficient contact analysis and optimum support design using commercial analysis software (상용 해석 소프트웨어를 이용한 접촉문제의 효과적 해석 및 최적 지지점 설계)

  • 최주호;원준호
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • 2004.10a
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    • pp.437-444
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    • 2004
  • In this study, an optimum support design problem is considered to minimize displacement of stacked plates under self weight condition. During the displacement analysis, several kinds of contact arise between the plates themselves and support bar. These can be easily considered if commercial analysis software, which provides capability to solve the contact problem, is used. It is found, however, that the computing time is extraordinarily long due possibly to the generality of the software and also to the ignorance of the control parameters used in the software. In this paper, the contact condition is imposed directly by the authors, while the software is used only to solve the ordinary displacement analysis problem. In this way, the computing time is decreased remarkably by more than 30 times, while yielding the same accurate results. Optimization is conducted based on this efficient analysis method to find minimum number of supporting bars using the response surface algorithm.

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Development of Simulator for Designing Unidirectional AGV Systems (일방향 AGV 시스템 설계를 위한 시뮬레이터 개발)

  • Lee, Gyeong-Jae;Seo, Yoon-Ho
    • Journal of the Korea Society for Simulation
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    • v.17 no.4
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    • pp.133-142
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    • 2008
  • AGV systems are widely used to increase the flexibility and the efficiency of the material handling systems. AGV systems are one of critical factors which determine the overall performance of the manufacturing systems. To this end, the optimal design for AGV systems is essential. Commercial simulation software is often used as an analysis tool during the design of AGV systems, however a series of procedures are desirable to simplify the analysis processes. In this paper, we present and develop the architecture for unidirectional AGV systems simulator which is able to consider approximate optimal unidirectional flow path and various operational parameters. The designed AGV systems simulator is based on JAVA, and it is developed to support designing approximate optimal unidirectional network by using Tabu search method. In addition, it enables users to design and evaluate AGV systems and to analyze alternative solutions easily. Simulation engine is consists of layout designer, AGV operation plan designer, and integrated AGVS layout designer. Users enter their system design/operation information into input window, then the entered information is automatically utilized for modeling and simulating AGV systems in simulation engine. By this series of procedures, users can get the feed back quickly.

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Sequential Approximate Optimization of Shock Absorption System for Lunar Lander by using Quadratic Polynomial Regression Meta-model (2차 다항회귀 메타모델을 이용한 달착륙선 충격흡수 시스템의 순차적 근사 최적설계)

  • Oh, Min-Hwan;Cho, Young-Min;Lee, Hee-Jun;Cho, Jin-Yeon;Hwang, Do-Soon
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.39 no.4
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    • pp.314-320
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    • 2011
  • In this work, optimization of two-stage shock absorption system for lunar lander has been carried out. Because of complexity of impact phenomena of shock absorption system, a 1-D constitutive model is proposed to describe the behavior of shock absorption system. Quadratic polynomial regression meta-model is constructed by using a commercial software ABAQUS with the proposed 1-D constitutive model, and sequential approximate optimization of two-stage shock absorption system has been carried out along with the constructed meta-model. Through the optimization, it is verified that landing impact force on lunar lander can be considerably reduced by changing the cell size and foil thickness of honeycomb structure in two-stage shock absorption system.

Modified Inverted-F Type Wide Band Ceramic Dielectric Chip Antenna for IMT-2000 Handset (IMT-2000 단말기용 변형된 역 F형 광대역 세라믹 유전체 칩 안테나)

  • 이기성;채윤경;최익권
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.13 no.7
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    • pp.625-632
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    • 2002
  • In this paper, a wide band modified inverted-F type antenna printed on a high dielectric ceramic material is designed and fabricated. This antenna is designed to have optimum antenna characteristics analyzing the effects of design parameters such as printed antenna pattern, ceramic dielectric material dimension and dielectric constant on antenna characteristics using the commercial simulation tool HFSS. The fabricated antenna's width, length and height are 8 mm, 8 mm and 3 mm, respectively. Measurement results show that it has -10 dB bandwidth of 270 MHz which satisfies the IMT-2000 bandwidth required for handset and that its maximum radiation gain is 2 dBi.

Design of Frequency Selective Surface Based Artificial Magnetic Conductor Using the Particle Swarm Optimization (PSO를 이용한 주파수 선택 구조 기반 인공 자기 도체 설계)

  • Hong, Ic-Pyo;Lee, Kyung-Won;Yook, Jong-Gwan;Cho, Chang-Min;Chun, Hueng-Jae
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.21 no.6
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    • pp.610-616
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    • 2010
  • In this paper, particle swarm optimization(PSO) is applied for the design of frequency selective surface based artificial magnetic conductor. An equivalent circuit model for this artificial magnetic conductor(AMC) with Jerusalem Cross arrays was derived and then PSO was applied for obtaining the optimized geometrical parameters with desired resonant frequency. The resonant frequency and the reflection phase characteristics from the optimization were compared to the results from commercial software for verifying the validity of this paper. The procedure presented in this paper can be applied to design the AMC with different frequency selective surface and also can be used for the design of microwave circuits like the AMC ground planes.