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장홍석(Hongsuk Chang),이중섭(Jungsup Lee) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
Various optimization schemes have successfully been utilized to design mounting brackets of chassis components, especially suspension systems, in the large commercial vehicle development process. Depending on the design status, different optimization schemes, i.e. size, topology, and shape, are applied. There are two key elements that determine types of optimization schemes used, which are design freedom and available analysis time. First, in a case that the design is already frozen near the mass production, so that only minimal design change and time is allowed, the size optimization is attempted. Second, in the middle of the design process where relatively more room for the change is available, the topology optimization is adequate to carry out, based on the basic CAD model. Finally, early in the design process, when total freedom is given for the design and sufficient analysis time is allowed, both the topology and the shape optimization can be adopted, starting from a box model without any reference CAD model. In this paper, it is discussed how these optimization methods were exploited to achieve an optimized design of the brackets ? more stiffness, strength, and less weight. As a example, hanger mounting bracket is optimized by using suggested well-developed optimization process.
장홍석(Hongsuk Chang) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.11_3
Various optimization schemes have successfully been utilized to design the mounting brackets of the chassis components, especially suspension systems, recently in the heavy duty truck development process. Depending on the design status, different optimization schemes, i.e. size, topology, and shape, are applied. First, in case that the design is already frozen near the mass production, so that only minimal change is allowed, the size optimization is attempted. Second, in the middle of the design process where relatively a more room for the change is available, the shape optimization is adequate to carry out, based on the basic CAD model. Finally, early in the design process, when a total freedom is given for the design, the topology optimization can be adopted, starting from a box model without any reference CAD model. In this paper, it is discussed how these optimization methods were exploited to achieve an optimized design of the brackets - more stiffness, strength, and less weight.
NVH와 내구성능을 고려한 엔진마운팅 목표전개기법 최적 컨셉설계
장용석(YongSok Jang),유승원(SeungWon Yoo),장홍석(HongSuk Chang),박종찬(Jong Chan Park) 한국자동차공학회 2018 한국자동차공학회 부문종합 학술대회 Vol.2018 No.6
Rubbers of vehicle engine mounting are attached at the engine that contributes the biggest vibrating energy. To design the engine mounting, NVH and durability performances are important, but those mostly conflict with each other. To solve this challenging task, Analytical Target Cascading optimization algorithm was used. Engine mtg. system was divided to dynamic solution and durability solution. To connect these two functional differences, rubbers’ stiffness was calculated individually from dynamic solver and FEM solver. And then the Analytical Target Cascading optimized the engine mtg. reducing the difference between them. To avoid abandonment due to late solution, Meta modeling was derived from design of experiment analysis. As a result, the optimized design became to satisfy both NVH and durability performance target.