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DEVELOPMENT OF AN IMPROVED THREE-DIMENSIONAL STATIC AND DYNAMIC STRUCTURAL ANALYSIS BASED ON FETI-LOCAL METHOD WITH PENALTY TERM

  • KIM, SEIL (DEPARTMENT OF MECHANICAL AND AEROSPACE ENGINEERING, SEOUL NATIONAL UNIVERSITY) ;
  • JOO, HYUNSHIG (DEPARTMENT OF MECHANICAL AND AEROSPACE ENGINEERING, SEOUL NATIONAL UNIVERSITY) ;
  • CHO, HAESEONG (BK21 PLUS TRANSFORMATIVE TRAINING PROGRAM FOR CREATIVE MECHANICAL, INSTITUTE OF ADVANCED MACHINES AND DESIGN, SEOUL NATIONAL UNIVERSITY) ;
  • SHIN, SANGJOON (DEPARTMENT OF MECHANICAL AND AEROSPACE ENGINEERING, INSTITUTE OF ADVANCED AEROSPACE TECHNOLOGY)
  • Received : 2017.06.29
  • Accepted : 2017.09.14
  • Published : 2017.09.25

Abstract

In this paper, development of the three-dimensional structural analysis is performed by applying FETI-local method. In the FETI-local method, the penalty term is added as a preconditioner. The OPT-DKT shell element is used in the present structural analysis. Newmark-${\beta}$ method is employed to conduct the dynamic analysis. The three-dimensional FETI-local static structural analysis is conducted. The contour and the displacement of the results are compared following the different number of sub-domains. The computational time and memory usage are compared with respect to the number of CPUs used. The three-dimensional dynamic structural analysis is conducted while applying FETI-local method. The present results show appropriate scalability in terms of the computational time and memory usage. It is expected to improve the computational efficiency by combining the advantages of the original FETI method, i.e., FETI-mixed using the mixed local-global Lagrange multiplier.

Acknowledgement

Supported by : National Research Foundation of Korea(NRF)

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