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기하비선형을 고려한 위상최적설계의 안정성을 위한 변위 보정법

Title
기하비선형을 고려한 위상최적설계의 안정성을 위한 변위 보정법
Other Titles
Displacement adaptation technique dealing with the numerical instability in topology optimization with large deformation
Author
민승재
Keywords
위상최적설계; 기하비선형; 수치적 불안정성; Topology optimization; Geometric nonlinearity; The numerical instability
Issue Date
2016-12
Publisher
대한기계학회
Citation
대한기계학회 2016년도 학술대회, Page. 1883-1884
Abstract
This paper proposes the displacement adaptation technique for preventing the numerical instability in nonlinear topology optimization. Since the tangent stiffness matrix often becomes negative definite or indefinite with the topological variable in nonlinear finite element analysis, the analysis results can be inaccurate and even cannot be obtained. To avoid this problem, the proposed method detects the distorted elements in low density area and replaces the nodal displacements of them into adaptive displacements. The adaptive displacements are obtained by solving the sub-optimization problem, which minimizes the distorted mesh in the detected domain. To verify the effectiveness of the proposed method, several benchmarking structural design problems with consideration of the large deformation are provided.
URI
http://www.dbpia.co.kr/Journal/ArticleDetail/NODE07104779https://repository.hanyang.ac.kr/handle/20.500.11754/101915
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > AUTOMOTIVE ENGINEERING(미래자동차공학과) > Articles
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