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Study on the Reduced System Based on the Sub-Domain Method

영역분할 기법에 기초한 축소시스템 구축에 관한 연구

  • 김현기 (서울대학교 대학원 기계항공공학부) ;
  • 조맹효 (서울대학교 기계항공공학부) ;
  • 김혁 (삼성전자 메카트로닉스 연구소) ;
  • 최형길 (삼성전자 메카트로닉스 연구소) ;
  • 최재락 (삼성전자 메카트로닉스 연구소)
  • Published : 2006.09.01

Abstract

Reduction schemes approximate the lower eigenvalues that represent the global behavior of the structures. But, they are not efficient to be applied to large-scaled problems because these schemes require considerable amount of computing time in constructing reduced one from the original large-scaled systems. In addition, the selection of the primary degrees of freedom might be localized to cause the excessive emphasis of the lower mode or lost of the important modes. In the present study, a new reduction method combined with the subdomain method is proposed. For the construction of the final reduced system the system of each domain subdivided into primary, slave and interface degrees of freedom. It is remarkably efficient and accurate comparable to full-scale system. Numerical examples demonstrate that the proposed method saves computational cost effectively and provides a reduced system which predicts accurate eigen-pairs of global system.

Keywords

Two-Level Condensation Scheme;Sub-Domain Method;Reduced System;Sequential Elimination Scheme

References

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