Název:
Direct construction of reciprocal mass matrix and higher order fininite element method
Autoři:
Cimrman, Robert ; Kolman, Radek ; González, J. A. ; Park, K. C. Typ dokumentu: Příspěvky z konference Konference/Akce: SEMINAR ON NUMERICAL ANALYSIS - SNA /23./, Ostrava (CZ), 20230123
Rok:
2023
Jazyk:
eng
Abstrakt: When solving dynamical problems of computational mechanics, such as contact-impact problems or cases involving complex structures under fast loading conditions, explicit time-stepping algorithms are usually preferred over implicit ones. The explicit schemes are normally combined with the lumped (diagonal) mass matrix so that the calculations are efficient and moreover dispersion errors in wave propagation are partially eliminated. As an alternative to lumping with advantageous properties, the reciprocal mass matrix is an inverse mass matrix that has the same sparsity structure as the original consistent mass matrix, preserves the total mass, captures well the desired frequency spectrum and leads thus to efficient and accurate calculations. In the contribution we comment on the usability of the reciprocal mass matrix in connection with higher order FEM.
Klíčová slova:
explicit time integration; higher-order finite element method; lumping process; reciprocal mass matrix; transient problems Číslo projektu: GA23-06220S (CEP) Poskytovatel projektu: GA ČR Zdrojový dokument: Seminar on Numerical Analysis & Winter School. Proceedings of the conference SNA'23, ISBN 978-80-86407-85-2