• 제목/요약/키워드: mix design method

검색결과 246건 처리시간 0.027초

복합 적층구조의 최적설계를 위한 유전알고리즘의 적용 (Application of GA for Optimum Design of Composite Laminated Structures)

  • 이상근;한상훈;구봉근
    • 한국전산구조공학회:학술대회논문집
    • /
    • 한국전산구조공학회 1997년도 가을 학술발표회 논문집
    • /
    • pp.163-170
    • /
    • 1997
  • The present paper describes an investigation into the application of the genetic algorithm(GA) in the optimization of structural design. Stochastic processes generate an initial population of designs and then apply principles of natural selection/survival of the fittest to improve the designs. The five test functions are used to verify the robustness and reliability of GA, and as a numerical example, minimum weight of a cantilever composite laminated beam with a mix of continuous, integer and discrete design variables is obtained by using GA with exterior penalty function method. The design problem has constraints on strength, displacements, and natural frequencies, and is formulated to a multidimensional nonlinear form. From the results, it is found that the GA search technique is very effective at finding the good optimum solution as well as has higher robustness.

  • PDF

유통환경 마케팅 커뮤니케이션과 비쥬얼 머천다이징을 위한 전략수립에 관한 연구 (A Study on strategy for Retail Marketing Communication and Visual Mcrchandising)

  • 유영배
    • 디자인학연구
    • /
    • 제21권
    • /
    • pp.67-74
    • /
    • 1997
  • Marketing communication is becoming a critical element in today's competive retail environment. Consumers are better educated and discriminating in their choices. Especially, now in the totally opened Korean market situation, establishing proper retail marketing strategy faces many challenge and require special attention. In this study, various promotion media application strategies are mentioned in order to help retailers who need to develop their own promotion plan. Among the media mix, xisual merchandising is becoming effective communication system for retail promotion. Because of its complex development process, retailers and professionals both need to understand the theoretical background of VMD and application method. As a guide in developing systems for each use, it might have some limitations due to the method of research and data related to researcher's choice. In spite of above mentioned limitations, this study will serve as a practical guide for the retailers who wishes to achieve marketing goals in order to survive in this competitive retail situation.

  • PDF

스캠퍼 기법에 따른 여성복 디자인 경향 - 2010 S/S~2020 S/S 패션컬렉션을 중심으로 - (The trend of women's wear design by the SCAMPER method - Focused on the 2010 S/S~2020 S/S fashion collection -)

  • 이경림
    • 복식문화연구
    • /
    • 제29권1호
    • /
    • pp.28-47
    • /
    • 2021
  • The purpose of this study is to provide basic data to assist students and industrial designers in fashion by examining the trend of designing women's wear with the SCAMPER method. In the research, the seven types of SCAMPER methods for fashion design were classified based on the previous studies. From 2010 S/S to 2020 S/S, data from 5,149 photographs were collected through overlapping checks and classified by SCAMPER method type. Data analysis was performed using SPSS 25.0 for frequency analysis. As a result, in the SCAMPER "combine" method, more than two items were combined, or structural details were combined with items. In the most applied "adapt" method was involved imitating similar images, or natural forms, or other objects. The "modify" method was applied by changing the shape of some details in basic fashion items. The "magnify" method was applied by enlarging, elongating, or elevating some details of fashion items. The "minify" method was applied by minimizing, shortening, or lowering some details of basic fashion. The method of "put to other use" was expressed throughout the clothing by using non-fabric or trimmings such as metal, beads, and strings. The "rearrange" method was applied by repositioning the top and bottom, front and back, or outside and inside in fashion items and in details. The "reverse" method was applied by reversing the style of fashion, mix-and-match fabric, or switching the gender of the fashion items.

다중재료 구조물의 위상 최적화를 위한 재료혼합법의 개발 (Development of a Material Mixing Method for Topology Optimization of Multiple Material Structures)

  • 한석영;이수경
    • 대한기계학회논문집A
    • /
    • 제28권6호
    • /
    • pp.726-731
    • /
    • 2004
  • This paper suggests a material mixing method to mix several materials in a structure. This method is based on ESO(Evolutionary Structural Optimization), which has been used to optimize topology of only one material structure. In this study, two criterions for material transformation and element removal are implemented for mixing several materials in a structure. Optimal topology for a multiple material structure can be obtained through repetitive application of the two criterions at each iteration. Two practical design examples of a short cantilever are presented to illustrate validity of the suggested material mixing method. It is found that the suggested method works very well and a multiple material structure has more stiffness than one material structure has under the same mass.

진화적 구조 최적화를 이용한 재료 혼합법의 개발 (Development of a Material Mixing Method using ESO)

  • 한석영;이수경;신민석
    • 한국공작기계학회:학술대회논문집
    • /
    • 한국공작기계학회 2003년도 추계학술대회
    • /
    • pp.259-264
    • /
    • 2003
  • This paper suggests a material mixing method to mix several materials in a structure. This method is based on ESO(Evolutionary Structural Optimization), which has been used to optimize topology of only one material structure. In this study, two criterions for material transformation and element removal are implemented for mixing several materials in a structure. Optimal topology for a multiple material structure can be obtained through repetitive application of the two criterions at each iteration. Two practical design examples of a short cantilever are presented to illustrate validity of the suggested material mixing method. It is found that the suggested method works very well and a multiple material structure has more stiffness than one material structure has under the same mass.

  • PDF

시험시공 및 현장시험을 통한 C.S.G 공법의 적용성 검토 (Application study of C.S.G method by the test construction and field test)

  • 김기영;박한규;조성은;전제성
    • 한국지반공학회:학술대회논문집
    • /
    • 한국지반공학회 2006년도 춘계 학술발표회 논문집
    • /
    • pp.61-68
    • /
    • 2006
  • Cemented Sand and Gravel(CSG) is a material made by simple mixing of rock-based raw materials such as excavated soil and riverbed gravel together with cement and water. The use of CSG methodl for cofferdam and large dam is gradually increasing in Japan because a quarry and aggregate plants can be diminished. Also, the CSG method can reduce dam construction cost, construction duration and destruction of environment. In this paper, field test and test construction of CSG method was conducted on Hwabuk Dam. The mechanical properties of CSG, such as compressive strength, extention strength and field permeability test were investigated. From the results of the experimental study, application study of CSG method was discussed.

  • PDF

RCC 댐 콘크리트의 배합비 도출에 관한 연구 (Mix proportions of Concrete for Roller Compacted Concrete Dam Application)

  • 원종필;윤종환;황금식;장필성;김완영;정우성
    • 한국콘크리트학회:학술대회논문집
    • /
    • 한국콘크리트학회 2003년도 봄 학술발표회 논문집
    • /
    • pp.997-1002
    • /
    • 2003
  • Roller-compacted concrete(RCC) dam is a new type that combines advantages of earthfill dam and concrete dam in construction, This method save cost due to their rapid method of construction. RCC is, used in RCC dams, no-slump concrete so it is different that measure method of consistency and mixture properties compare with conventional mass concrete, There are existing two major design method, which one used in USA the other used in Japan. The results obtained in this study would be useful in establishing mixture proportions for dam concrete for RCC dams by apply method of compound their merit.

  • PDF

레미콘 품질 안정화를 위한 효율적인 단위수량 관리 방안 (Efficient Unit-Water Management Method for Stabilizing the Quality of Ready-mixed Concrete)

  • 최성우;류득현
    • 한국건축시공학회:학술대회논문집
    • /
    • 한국건축시공학회 2021년도 봄 학술논문 발표대회
    • /
    • pp.327-328
    • /
    • 2021
  • In the manufacturing process of ready-mixed concrete, quantity management directly affects the workability and strength of concrete. Therefore, water quantity is the most important management factor for water quality control of ready-mixed concrete. It can be said that the number of unit water in the mix design, the water quantity due to the surface water contained in the aggregate used, and the water quantity taking into account the concentration of sludge contained in the recycling water when using the recycling water are factors that affect the quantity management of ready-mixed concrete. In this study, as a stable quality control method of ready-mixed concrete, a quantity management method by aggregate surface water and a sludge concentration management method according to the use of recycling water were proposed. Thus, we tried to suggest an efficient quantity management method for stabilizing the quality of ready-mixed concrete.

  • PDF

시험시공을 통한 소입경 골재노출 콘크리트 포장의 배합, 시공 및 품질관리 기준 제안 (A Suggestion of Mix, Construction Method and Quality Control Criteria of Fine-size Exposed Aggregate PCC Pavement by Experimental Construction)

  • 이승우;김영규;최돈화;심재원;유태석
    • 한국도로학회논문집
    • /
    • 제13권3호
    • /
    • pp.51-63
    • /
    • 2011
  • 소입경 골재노출콘크리트포장은 콘크리트 포장 시공 시 포장표면에 적정 응결지연제를 분사한 후 표면 모르타르를 제거하여 굵은 골재를 노출시킴으로서 표면조직을 형성하는 공법으로써 기존 콘크리트 포장의 소음문제를 해결할 수 있는 저소음 공법이다. 소입경 골재노출 콘크리트 포장은 강도를 크게 개선할 뿐만 아니라 소음저감 효과 및 우수한 미끄럼 저항성을 확보하여 도로이용자의 안정성을 확보할 수 있는 공법이다. 현재 국외 도로 선진국의 경우 골재노출 포장의 상용화가 이루어진 상태이지만 국내의 경우는 실용화 초기단계이기 때문에 현장적용을 위해서는 국내 여건에 맞는 합리적인 관리 기준이 필요하다. 이를 위하여 소입경 골재노출 콘크리트 포장의 최적배합 및 노출기법 연구, 굵은 골재의 선정 및 입도 설계, 환경하중 저항성 평가 등 실내시험을 수행하였으며, 소입경 골재노출 콘크리트 포장의 시공을 위한 시공 장비를 제작하였다. 따라서 본 연구에서는 시험시공을 통해 도출된 결과와 기존 실내시험에서 도출된 결과를 비교 분석하였으며, 시험시공 분석을 통하여 골재 탈리 방지, 강도 및 내구성 확보를 위한 표준배합을 제시하였다. 환경 및 시공조건이 상이한 3차례 시험시공 구간을 선정하여 시공현장여건에 유동성으로 대처할 수 있는 시공 기술 및 시공 기준을 제시하였다. 또한 장 단기 공용성 평가를 통하여 도로 포장의 기능성 측면에서 우수한 소음저감 및 미끄럼 저항성을 확보할 수 있는 노면조직의 품질관리 기준을 제시하였다.

시험시공을 통한 소입경 골재노출 콘크리트포장의 초기 공용성 평가 (Initial Performance Evaluation of Fine-size Exposed Aggregate PCC Pavement by Experimental Construction)

  • 김영규;최돈화;이승우;김형배
    • 한국도로학회논문집
    • /
    • 제12권1호
    • /
    • pp.87-98
    • /
    • 2010
  • 소입경 골재노출 콘크리트포장은 콘크리트 타설 직후 포장표면에 응결지연제를 살포하여 표면으로부터 2~3mm 정도의 모르타르 경화를 늦추게 한 후 표면의 모르타르 제거를 통해 굵은 골재를 포장표면에 노출시키는 공법이다. 소입경 골재노출 콘크리트포장의 타이어-노면 소음은 일반 콘크리트포장보다 작으면서도 적정한 미끄럼저항을 장기간 유지한다는 장점을 가지고 있다. 성공적인 소입경 골재노출 콘크리트포장의 건설을 위해서는 굵은골재의 최대입경이 적정하여야 하며 적정량의 굵은골재를 포장표면에 균일하게 노출하도록 해야 하기 때문에 이를 위한 적절한 배합과 노출기법의 도출이 요구된다. 본 연구에서는 소입경 골재노출 콘크리트포장의 시험시공을 실시하여 초기 공용성을 평가하였으며, 이를 통하여 적정 강도, 저소음 및 적정 미끄럼저항을 확보함을 확인하였다.