In this paper, a finite element domain decomposition method using local and mixed Lagrange multipliers for a large scal structural analysis is presented. The proposed algorithms use local and mixed Lagrange multipliers to improve computational efficiency. In the original FETI method, classical Lagrange multiplier technique was used. In the dual-primal FETI method, the interface nodes are used at the corner nodes of each sub-domain. On the other hand, the proposed FETI-local analysis adopts localized Lagrange multipliers and the proposed FETI-mixed analysis uses both global and local Lagrange multipliers. The numerical analysis results by the proposed algorithms are compared with those obtained by dual-primal FETI method.

• 곽준영(서울대학교 기계항공공학부) | Jun Young Kwak
• 조해성(서울대학교 기계항공공학부) | Hae Seong Cho
• 신상준(서울대학교 기계항공공학부) | Sang Joon Shin Corresponding author
• 올리비에 보쇼(미시간-상해교통대 연합대학교 기계공학부) | 올리비에보쇼