• 한국산학기술학회논문지
• /
• 제7권2호
• /
• pp.101-106
• /
• 2006

본 연구에서는 통계적 파괴 분석으로서 turbine blade에서의 피로 수명이 최소화되는 최적 설계안을 도출하는 데에 있다. 그 방법으로서는 최소한의 피로 수명이 나오는 설계안을 위해 먼저 fillet radius를 고정한 후, 실험 계획법을 통하여 turbine blade에서의 최적의 X 와 Y 위치를 찾는다. 또한 six sigma analysis로서 X 와 Y 인자에서의 공정에 대한 불확실성을 계산한다. 그리고 robust design을 사용하여 주어진 불확실성 상태에서 최적의 fillet radius 값을 결정하여 최대의 von Mises 응력은 20%가 작아지고 피로수명이 두 배가 되는 최적의 설계를 할 수가 있었다.

• 한국공작기계학회:학술대회논문집
• /
• 한국공작기계학회 2000년도 춘계학술대회논문집 - 한국공작기계학회
• /
• pp.355-360
• /
• 2000

There are many changed while a design is completed. Therefore, if the impact of the design changes is estimated, it may result in the improvement of design efficiency. But, the design changes have various types and affect other parts of the design system. Hence, it is difficult to deal with design changes directly. The purpose of this research is to develop a systematic change propagation tracing algorithm and a method of change impact analysis and then, to implement a change impact analysis system. Process based design is set up for the field of this research. Also the design, composed of design parameters and constraints, is set up for the subject of the research. Change propagation tracing algorithm traces change propagation based on the following concept : If the design parameters are changed, other parameters within the constrains including them may be changed. Using the result of change propagation tracing algorithm, changeable parameters, constraints and tasks can be found. The method of change impact analysis, to calculate change impact value from this changeable tasks, is developed. Change propagation tracing algorithm and the method of change impact analysis are implemented into change impact analysis system and it is applied to the redesign of 2 stage gear drives. It can support different kinds of design activities systematically. especially, at the redesign step, where many design change alternatives exist, change impact value of each alternative exist, change impact value of each alternative is calculated and design change is performed toward direction to minimize the impact of design change. Consequently, it is expected to improve the efficiency of the whole design.

• 전기학회논문지P
• /
• 제56권2호
• /
• pp.83-89
• /
• 2007

The LC filter design procedure of the inverter output filter is described. The transfer function of the filter output voltage to the load current is described with the capacitor value and the system time constant considering the system controller. By using the closed form of the relation between the filter capacitor value and the system time constant, the capacitor value can be calculated with the given system time constant and vice versa. It is more practical for the implementation of power and control circuit of inverter. And as the effect of the load current to the voltage distortion can be calculated from the closed form, it is possible to analyze the system how much the voltage waveform is distorted in case of the nonlinear load. All the proposed design procedure is verified with the simulation and experimental results.

• 한국정밀공학회지
• /
• 제16권1호통권94호
• /
• pp.75-86
• /
• 1999

In the assembly system, a pallet plays an important role of transfer and storage. As products become various, many different pallets are also necessary. Since some of them are redundant, a design of pallet with high flexibility is important. This paper suggests design alternatives, in designing pallets with high flexibility. The purpose of this study is to rationalize assembly process of mid-small size products. Every pallet has suitability values depending on characteristic factors of a product, and this value is determined by using AHP (Analytic Hierarchy Process) technique. As the characteristic factors of a product are changed, the suitability value is also changed. Design alternatives can be found by tracing change of the suitability value, which are based on correlation between the characteristic factors of a product and a pallet element.

• Structural Engineering and Mechanics
• /
• 제88권4호
• /
• pp.369-377
• /
• 2023

In this study, previously developed algorithm is used for Optimization of hybrid composite plates using Tsai-Wu criteria. For the stress-based Design Optimization problems, Von-Mises stress uses as design variable for isotropic materials. Maximum stress, maximum strain, Tsai Hill, and Tsai-Wu criteria are generally used to determine failure of composite materials. In this study, failure index value is used as design variable in the optimization algorithm and Tsai-Wu criteria is utilized to calculate this value. In the analyses, commonly used design domains according to different hybrid orientations are optimized and results are presented. When the optimization algorithm was applied, 50% material reduction was obtained without exceeding allowable failure index value.

• 한국암반공학회:학술대회논문집
• /
• 한국암반공학회 2000년도 암반공학문제의 수치해석(Numerical Analysis in Rock Engineering Problems)
• /
• pp.223-228
• /
• 2000

본 연구에서는 발파 설계를 쉽게 하기 위하여 RBD(Rock Blasting Design)프로그램을 개발하였다 이 프로그램은 시험 발파 설계, 벤치 발파 설계, 그리고 발파 진동 해석의 기능을 가지며, 지질 특성 값과 발파 상수를 데이터베이스로 제공하고, 여러 상수 값을 재 입력함으로써 보다 빠르고 간편하게 설계할 수 있고 한번 입력한 상수 값을 사용자가 재사용 할 수 있도록 하였다.

• Journal of the Korean Statistical Society
• /
• 제13권1호
• /
• pp.57-68
• /
• 1984

A method of missing value estimation for a general design is descrived. In particular, the cases of missing value estimation for $2^k$ and $3^k$ design are explored and discussed. Some examples are illustrated to show the missing value estimation and the nonestimatimable cases.

• 한국실내디자인학회논문집
• /
• 제14권6호
• /
• pp.228-235
• /
• 2005

This study analyzes the new possibility of design through the research for the expression of cladding design architectural materials, and applies to connection with creative design concept. In these modern days, architectural materials became the subject of expression as itself thanks to the development of new technology and materials. The physical properties of materials and their beauty value made possible the variety and possibility of expression in space design. The expressional properties of materials can lead mutual communication between commodity and brand by association, presenting brand image and the distinction of its value. Therefore, the trends of designed material expression in space design according to modern aspect can offer the possibility of material space design for ahead. This study suggest an alternative idea for revitalizing design by materials.

• 한국디자인학회:학술대회논문집
• /
• 한국디자인학회 2004년도 추계 학술발표대회 논문집
• /
• pp.74-75
• /
• 2004

• 터널과지하공간
• /
• 제10권3호
• /
• pp.469-474
• /
• 2000

본 연구에서는 발파 설계를 쉽게 하기 위하여 RBD(Rock Blasting Design) 프로그램을 개발하였다. 이 프로그램은 시험 발파 설계, 벤치 발파 설계, 그리고 발파 진동 해석의 기능을 가지며, 지질 특성 값과 발파 상수를 데이터베이스로 제공하고, 여러 상수 값을 재 입력함으로써 보다 빠르고 간편하게 설계할 수 있고 한번 입력한 상수 값을 사용자가 재사용 할 수 있도록 하였다.