期刊
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
卷 193, 期 6-8, 页码 575-599出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cma.2003.10.013
关键词
von-Karman plate model; pseudo-spectral methods; modeling errors
The von-Karman non-linear, dynamic, partial differential system over rectangular domains is solved by the Chebyshev-collocation method in space and the implicit Newmark-beta time marching scheme in time. In the Newmark-beta scheme, a non-linear fixed point iteration algorithm is employed. We monitor both temporal and spatial discretization errors based on derived analytical solutions, demonstrating highly accurate approximations. We also quantify the influence of a common modeling assumption which neglects the in-plane inertia terms in the full von-Karman system, demonstrating that it is justified. A comparison of our steady-state von-Karman solutions to previous results in the literature and to a three-dimensional high-order finite element analysis is performed, showing an excellent agreement. Other modeling assumptions such as neglecting in-plane quadratic terms in the strain expressions are also addressed. (C) 2003 Elsevier B.V. All rights reserved.
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