http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
민감도 해석을 이용한 로우어 컨트롤 암의 구조 최적설계
송병철(Byoung-Cheol Song),김세훈(Se-Hun Kim),강정호(Joung-Ho Kang),박영철(Young-Chul Park),이권희(Kwon-Hee Lee) 한국기계가공학회 2007 한국기계가공학회 춘추계학술대회 논문집 Vol.2007 No.-
Recently developed automotive components are of lightweight nature, providing automobiles with a high fuel efficiency and performance. In response to those trends of car developments, this study proposes a structural optimization method for the lower control arm. Lightweight design of lower control arm can be achieved through two approaches: design and material technology. In this research, the former includes optimization technology, and the latter the technologies for selecting aluminum as a steel-substitute material. In this research, the design of experiments(DOE) built in ANSYS WORKBENCH are utilized to determine the optimum shape of a Lower Control Arm. And optimum design is compared first model and reduced design variable model that considered sensitivity using orthogonal array.
송병철(Byoung-Cheol Song),이권희(Kwon-Hee Lee) 한국기계가공학회 2008 한국기계가공학회지 Vol.7 No.3
Robust design pioneered by Dr. G. Taguchi has been applied to versatile engineering problems for improving quality. Since 1980s, the Taguchi method has been introduced to numerical optimization, complementing the deficiencies of deterministic optimization, which is often called the robust optimization. In this study, the robust optimization strategy is proposed by considering the robustness of objective and constraint functions. The statistics of responses in the functions are surrogated by kriging models. In addition, objective and/or constraint function is represented by the probability of success, thus facilitating robust optimization. The mathematical problem and the two-bar design problem are investigated to show the validity of the proposed method.
송병철(Byoung-Cheol Song),방일권(Il-Kwon Bang),한동섭(Dong-Seop Han),한근조(Geun-Jo Han),이권희(Kwon-Hee Lee) 한국기계가공학회 2008 한국기계가공학회지 Vol.7 No.3
Rail clamps are mechanical components installed to fix the container crane to its lower members against wind blast or slip. According to rail clamps should be designed to survive harsh wind loading conditions. In this study, a jaw structure, which is a part of a wedge-typed rail clamp, is optimized with respect to its strength under a severe wind loading condition. According to the classification of structural optimization, the structural optimization of a jaw is included in the category of shape optimization. Conventional structural optimization methods have difficulties in defining complex shape design variables and preventing mesh distortions. To overcome the difficulties, the metamodel using Kriging interpolation method is introduced to replace the true response by an approximate one. This research presents the shape optimization of a jaw using iterative Kriging interpolation models and a simulated annealing algorithm. The new Kriging models are iteratively constructed by refining the former Kriging models. This process is continued until the convergence criteria are satisfied. The optimum results obtained by the suggested method are compared with those obtained by the DOE (design of experiments) and VT (variation technology) methods built in ANSYS WORKBENCH.
민감도 해석을 이용한 로우어 컨트롤 암의 구조 최적설계
송병철(Byoung-Cheol Song),조영직(Young-Jik Jo),김주형(Ju-Hyoung Kim),이권희(Kwon-Hee Lee),박영철(Young-Chul Park) 한국기계가공학회 2008 한국기계가공학회지 Vol.7 No.1
Recently developed automotive components are of lightweight nature, providing automobiles with a high fuel efficiency and performance. In response to those trends of car developments, this study proposes a structural optimization method for the lower control ann. Lightweight design of lower control am can be achieved through two approaches: design and material technology. In this research, the former includes optimization technology, and the latter the technologies for selecting aluminum as a steel-substitute material. In this research, the design of experiments(DOE) built in ANSYS WORKBENCH are utilized to determine the optimum shape of a Lower Control Arm. And optimum design is compared first model and reduced design variable model that considered sensitivity using orthogonal array.
송병철(Byoung-Cheol Song),박한석(Han-Seok Park),권영민(Young-Min Kwon),박영철(Young-Chul Park),이권희(Kwon-Hee Lee) 한국기계가공학회 2008 한국기계가공학회 춘추계학술대회 논문집 Vol.2008 No.-
Recently developed automotive components are of lightweight nature, providing automobiles with a high fuel efficiency and performance. In response to those trends of car developments, this study proposes a structural optimization method for the lower control arm. Lightweight design of lower control arm can be achieved through two approaches: design and material technology. In this research, the former includes optimization technology, and the latter the technologies for selecting aluminum as a steel-substitute material. One of the goals in designing a control arm is to achieve the minimum weight under the constraints such as stiffness, strength, etc. At the initial proto design stage of a new control arm, strength and damage assessments are the commonly used design criteria. Considering the need for a prompt design recommendation in the proto design stage, it is desirable to utilize the FE (finite element) method, replacing the related tests in laboratory. This study considers the several service loads transmitted to the control arm. The inertia relief analysis for FE method is utilized to simulate the loading conditions. Optimum results are obtained by Kriging metamodel and ANSYS Workbench(DOE). In this research, optimum results which obtained by two methods are compared with each other.
열탄성 불안정성을 고려한 원주면 마찰형 디스크 브레이크의 구조설계
송병철(Byoung-Cheol Song),강동헌(Dong-Heon Kang),김영희(Young-Hee Kim),박영철(Young-Chul Park),이권희(Kwon-Hee Lee) 한국기계가공학회 2007 한국기계가공학회지 Vol.6 No.3
Weight reduction for an automobile component has been sought to achieve fuel efficiency and energy conservation. In response to this trend, a new disc-brake called the circumferential friction disc-brake is suggested. This paper compares the mechanical performances of a conventional disc-brake and a suggested disc-brake, under the dynamic braking condition. The thermoelastic instability is considered to simulate the test condition. Furthermore, the metamodel using kriging interpolation method is introduced to obtain the optimum design of a suggested circumferential friction disc-brake. The design results obtained by the kriging method are compared with those obtained by the ANSYS.
타이어 다목적 최적설계를 위한 근사모델 생성에 관한 연구
송병철(Byoung-Cheol Song),김성래(Seong-Rae Kim),강용구(Yong-Gu Kang),한민현(Min-Hyeon Han) 한국기계가공학회 2011 한국기계가공학회지 Vol.10 No.5
Tire’s performance plays important roles in improving vehicle’s performances. Tire makers carry out a lot of research to improve tire’s performance. They are making effort to meet multi purposes using various optimization methods. Recently, the tire makers perform the shape optimization using approximation models, which are surrogate models obtained by statistical method. Generally, the reason why we increase sampling points during optimization process, is to get more reliable approximation models, but the more we adopt sampling points, the more we need time to test. So it is important to select approximation model and proper number of sampling points to balance between reliability and time consuming. In this research, we studied to compare two kind cases for a approximation construction. First, we compare RSM and Kriging which are Curve Fitting Method and Interpolation Method, respectively. Second, we construct approximation models using three different number of sampling points. And then, we recommend proper approximation model and orthogonal array adopt tire’s design optimization.
강동헌(Dong-Heon Kang),송병철(Byoung-Cheol Song),박영철(Young-Chul Park),이권희(Kwon-Hee Lee) 한국기계가공학회 2008 한국기계가공학회지 Vol.7 No.2
Current trend of design technologies shows engineers to objectify or automate the given decision-making process. The numerical optimization is an example of such technologies. However, in numerical optimization, the uncertainties are uncontrollable to efficiently objectify or automate the process. To better manage these uncertainties, Taguchi method, reliability-based optimization and robust optimization are being used. Based on the independence axiom of axiomatic design theory that illustrates the relationship between desired specifications and design parameters, the designs can be classified into three types: uncoupled, decoupled and coupled. To best approach the target performance with the maximum robustness is one of the main functional requirements of a mechanical system. Most engineering designs are pertaining to either coupled or decoupled ones, but these designs cannot currently accomplish a real robustness thus a trade-off between performance and robustness has to be made. In this research, the game theory will be applied to optimize the trade-off.