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최적화 기법을 이용한 단조로 제작된 타이 로드 물성 도출
진성완(Sungwan Jin),신인섭(Inseob Shin),고수곤(Soogon Koh),김용갑(Yong Kap Kim),김재산(Jae-San Kim) 한국자동차공학회 2017 한국자동차공학회 학술대회 및 전시회 Vol.2017 No.11
Recently test-based correlation of CAE (computer aided engineering) analysis is required in various industries including automotive department, and the research has progressed on CAE analysis modeling, material properties and boundary conditions. In this paper, we derive material properties, Young’s modulus, yield strength and tensile strength, of steering component of forging tie rod assembly, inner tie rod and outer tie rod, for CAE analysis using optimization method. We formulated a design problem to minimize the error between 1st natural frequency of modal test, buckling strength of buckling test, and CAE analysis results using gradient-based algorithm, SQP (sequential quadratic programming) optimization method sequentially. The derived material properties of forging tie rod components reveal that the error between modal test, buckling test, and CAE analysis results has reduced.
임효석(Hyosuk Lim),신인섭(Inseob Shin),이주형(Joohyung Lee),신용우(Yongwoo Shin),박광서(Kwangseo Park) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
Statistical energy analysis is very useful tool to predict and optimize acoustic performances which are transmission loss and absorption coefficient as well as high frequency interior noise in the advanced development stage. Light weight insulation that has dual impedance layers is considered to create prediction model and find optimal layer information which satisfies both low mass and high performance in this paper. Design of experiment was performed to get trusted response surface model that is almost close to analytical model and analysis of variance to check the sensitivity of input variables. Finally optimization was suggested and optimized solution was validated with test result for two different dash insulations that are optimized and comparison sample. Measured transmission loss and absorption coefficient trend for two samples shows good agreement with predicted result.
아우터 타이 로드 경량화를 위한 근사 모델 기반 최적 설계
진성완(Sungwan Jin),고수곤(Soogon Koh),신인섭(Inseob Shin),김용갑(Yong Kap Kim),박규식(Kyushik Park) 한국자동차공학회 2018 한국자동차공학회 학술대회 및 전시회 Vol.2018 No.11
Recently in the various industries including automotive department are using CAE (computer aided engineering) method to reduce the development costs such as time and material cost. In this paper, we simplified the outer tie rod from finite element (FE) model to beam element model, approximation model. And we formulated a design problem to minimize the weight of outer tie rod while satisfying the design constraints, buckling load. Design optimization results reveals that the weight is reduced by 10.3% using evolutionary algorithm.
실험계획법을 이용한 Steering Vibration 최적설계
김병훈(Byounghoon Kim),권우성(Woosung Kwon),신인섭(Inseob Shin),한우섭(Woosub Han),박광서(Kwangseo Park) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
The Steering vibration is one of the major contributors to the perceived quality in a vehicle. Especially, the steering vibration is the important role at the idle status. So it has a lot of effort to improve the steering vibration. The Steering vibration is related to the steering column, IP Structure and BIW (body in white) structure. In this paper, Design parameters are limited to IP Structure and BIW (body in white) structure and we will find important optimization design parameters among many design parameters through DOE and Kriging method. Also, we will find the optimized shape through the shape optimization analysis to improve the steering vibration and minimize the mass increase.