Reciprocal mass matrices and a feasible time step estimator for finite elements with Allman's rotations
Reciprocal mass matrices and a feasible time step estimator for finite elements with Allman's rotations
复制标题
具有奥尔曼旋转的有限元的倒数质量矩阵和可行的时间步长估计器
DOI:
10.1002/nme.6583
复制
发表时间:
2020
影响因子:
2.9
通讯作者:
A. Tkachuk
中科院分区:
文献类型:
--
作者:
A. Tkachuk
Finite elements with Allman's rotations provide good computational efficiency for explicit codes exhibiting less locking than linear elements and lower computational cost than quadratic finite elements. One way to further raise their efficiency is to increase the feasible time step or increase the accuracy of the lowest eigenfrequencies via reciprocal mass matrices. This article presents a formulation for variationally scaled reciprocal mass matrices and an efficient estimator for the feasible time step for finite elements with Allman's rotations. These developments take special care of two core features of such elements: existence of spurious zero‐energy rotation modes implying the incompleteness of the ansatz spaces, and the presence of mixed‐dimensional degrees of freedom. The former feature excludes construction of dual bases used in the standard variational derivation of reciprocal mass matrices. The latter feature destroys the efficiency of the existing nodal‐based time step estimators stemming from the Gershgorin's eigenvalue bound. Finally, the developments are tested for standard benchmarks and triangular, quadrilateral, and tetrahedral finite elements with Allman's rotations.
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影响因子:
2.9
作者:
J. A. González;R. Kolman;S. S. Cho-S.;C. Felippa;K. Park
通讯作者:
J. A. González;R. Kolman;S. S. Cho-S.;C. Felippa;K. Park
影响因子:
2.9
作者:
J. A. González;K. Park
通讯作者:
K. Park
DOI:
--
发表时间:
1996
期刊:
影响因子:
--
作者:
D. Allman
通讯作者:
D. Allman
DOI:
10.1016/j.cma.2017.08.035
发表时间:
2017-11
影响因子:
7.2
作者:
Anne-Kathrin Schaeuble;A. Tkachuk;M. Bischoff
通讯作者:
Anne-Kathrin Schaeuble;A. Tkachuk;M. Bischoff
影响因子:
2.9
作者:
J. A. González;J. Kopačka;R. Kolman;S. Cho;Kyung-Duck Park
通讯作者:
J. A. González;J. Kopačka;R. Kolman;S. Cho;Kyung-Duck Park