期刊
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
卷 200, 期 5-8, 页码 439-453出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cma.2010.06.030
关键词
Large-scale multibody; Contact; Friction; Cone complementarity problem
资金
- U.S. Department of Energy [DE-AC02-06CH11357]
- Italian Ministry of University [2007Z7K4ZB]
This paper proposes an iterative method that can simulate mechanical systems featuring a large number of contacts and joints between rigid bodies. The numerical method behaves as a contractive mapping that converges to the solution of a cone complementarity problem by means of iterated fixed-point steps with separable projections onto convex manifolds. Since computational speed and robustness are important issues when dealing with a large number of frictional contacts, we have performed special algorithmic optimizations in order to translate the numerical scheme into a matrix-free algorithm with O(n) space complexity and easy implementation. A modified version, that can run on parallel computers is discussed. A multithreaded version of the method has been used to simulate systems with more than a million contacts with friction. (C) 2010 Elsevier B.V. All rights reserved.
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