Time step estimates for explicit dynamics with reciprocal mass matrices
Time step estimates for explicit dynamics with reciprocal mass matrices
复制标题
使用倒数质量矩阵的显式动力学的时间步估计
DOI:
10.1002/pamm.201800039
复制
发表时间:
2018
期刊:
影响因子:
--
通讯作者:
Bischoff
中科院分区:
文献类型:
--
作者:
Tkachuk;Schaeuble;Bischoff
In this contribution, a novel local, node‐based time step estimate for explicit dynamics with reciprocal mass matrices is presented. Reciprocal mass matrices are sparse matrices used in explicit dynamics that allow computation of nodal acceleration from the total force vector. They can be built algebraically and variationally and aim for higher critical time steps or/and accuracy than the lumped mass matrix approximation. Since the element eigenvalue inequality by Fried is not valid for reciprocal mass matrices, element‐based estimates may be not conservative and they are consequently inadequate. Therefore, the nodal time step estimate for diagonally lumped mass matrices based on Gershgorin's theorem is further developed for application to reciprocal mass matrices. Additionally, simplifications of the proposed time step estimate that improve computational efficiency, especially for contact problems with the penalty method, are discussed. These simplifications use subadditivity and submultiplicativity properties of expressions used in the estimate. Finally, efficiency of the proposed estimate is illustrated by a numerical example.
登录
查看更多内容
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
DOI:
--
发表时间:
1994
期刊:
影响因子:
--
作者:
P. Bulson
通讯作者:
P. Bulson
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:
A. Tkachuk;M. Bischoff
通讯作者:
M. Bischoff
影响因子:
4.7
作者:
I. Fried
通讯作者:
I. Fried