Mechanical integrators for mixed elements in nonlinear elastodynamics

Mechanical integrators for mixed elements in nonlinear elastodynamics
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非线性弹性动力学中混合元件的机械积分器

DOI:
10.1002/pamm.200700187
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发表时间:
2007
期刊:
PAMM
影响因子:
--
通讯作者:
P. Betsch
P. Betsch
中科院分区:
--
文献类型:
--
作者:
M. Müller;P. Betsch

文献摘要

被引文献

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众所周知,增强假设应变 (EAS) 单元(例如,参见 [1])表现出改进的收敛行为,特别是在弯曲主导情况和不可压缩极限的情况下。在目前的工作中,我们重点关注 EAS 单元在非线性弹性动力学中的应用。特别是,我们的目标是设计半离散运动方程稳定数值积分的能量动量方案。为此,我们在具有对称性的一般有限维哈密顿系统框架中利用 Gonzalez [2] 引入的 G 等变离散导数的概念。 (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA,魏因海姆)
Enhanced assumed strain (EAS) elements (see, for example, [1]) are well‐known to exhibit improved convergence behavior, especially in the context of bending dominated situations and in the incompressible limit. In the present work we focus on the application of EAS elements to nonlinear elastodynamics. In particular, we aim at the design of energy‐momentum schemes for the stable numerical integration of the semi‐discrete equations of motion. For this purpose we make use of the notion of a G‐equivariant discrete derivative introduced by Gonzalez [2] in the framework of general finite‐dimensional Hamiltonian systems with symmetry. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)