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Indexed by:期刊论文

Date of Publication:2010-11-01

Journal:APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION

Included Journals:SCIE、EI、Scopus

Volume:31

Issue:11

Page Number:1337-1346

ISSN No.:0253-4827

Key Words:sampling theorem; efficiency; finite element discretization; macro element; condensation method; deformation modification; dispersion relationship

Abstract:The discretization size is limited by the sampling theorem, and the limit is one half of the wavelength of the highest frequency of the problem. However, one half of the wavelength is an ideal value. In general, the discretization size that can ensure the accuracy of the simulation is much smaller than this value in the traditional finite element method. The possible reason of this phenomenon is analyzed in this paper, and an efficient method is given to improve the simulation accuracy.