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임성훈(Sunghoon Lim),민승재(Seungjae Min) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
Level-set method has been successfully applied to find optimal distribution of single material in magnetic field. In practice many magnetic actuators are made up of multiple materials such as steel, copper and permanent magnet. This paper presents a new optimization method to design a magnetic actuator consisted of permanent magnet (PM) and ferromagnetic material (FM). We represent three different material’s properties (PM, FM and air) by introducing multiphase level-set model in which two level-set functions are employed. The optimization problem is formulated to maximize the magnetic force under the volume constraints of each material and adjoint sensitivities are used to update each level-set function. To validate the usefulness of the proposed method, the design of simple C-core actuator is performed.
용접면적 최소화를 위한 다중물질 차체구조의 위상최적설계
임성훈(Sunghoon Lim),민승재(Seungjae Min) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
This paper presents a new design optimization method that is applicable to design the vehicle body structure with multi-material. Two different level set functions are employed to express the properties of steel and aluminum in automotive body, and the concept of phase field model is applied to construct the objective function for considering the welding area which causes an increase of the production cost. The optimization problem is formulated to minimize both the mean compliance of body structure under an exciting load and the contact area between two materials. To confirm the usefulness of the proposed method, a structural design example for an automotive underbody is provided.