An r-h adaptive kinematic approach for 3D limit analysis
An r-h adaptive kinematic approach for 3D limit analysis
复制标题
用于 3D 极限分析的 r-h 自适应运动学方法
DOI:
10.1016/j.compgeo.2020.103531
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发表时间:
2020
影响因子:
5.3
通讯作者:
Hambleton, James P.
中科院分区:
文献类型:
--
作者:
Shi, Zhenhao;Hambleton, James P.
This paper explores a pathway for increasing efficiency in numerical 3D limit analysis throughr-hadaptivity, wherein nodal positions (r) and element lengths (h) are successively refined. The approach uses an iterative, nested optimization procedure involving three components: (1) determination of velocities for a fixed mesh of rigid, translational elements (blocks) using second-order cone programming; (2) adaptation of nodal positions using non-linear optimization (radaptivity); and (3) subdivision of elements based on the magnitude of the velocity jumps (hadaptivity). Examples show that the method can compute reasonably accurate limit loads at relatively low computational cost.
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