Curved hexahedral hybrid-mixed stress elements for structural dynamics

被引:0
作者
Neto, Eliseu Lucena [1 ]
Bussamra, Flavio Luiz de Silva [1 ]
Paciarotti, Giorgio [2 ]
Cardoso, Felipe Rodrigo [3 ]
机构
[1] Inst Tecnol Aeronaut, BR-12228900 Sao Jose Dos Campos, SP, Brazil
[2] Capgemini Engn, D-81829 Munich, Germany
[3] Empresa Brasileira Aeronaut, BR-12227901 Sao Jose Dos Campos, SP, Brazil
关键词
curved hexahedral; finite element; hybrid-mixed; structural dynamics; vibration; TREFFTZ FINITE-ELEMENT; ELASTODYNAMIC ANALYSIS; STABILITY ANALYSIS; VIBRATION; PLATES; MODEL; IMPLEMENTATION; FORMULATIONS; WAVELETS; SHELLS;
D O I
10.12989/sem.2024.92.3.245
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
Curved hexahedral finite elements based on the hybrid-mixed stress formulation are proposed for structural dynamic analysis of three-dimensional solids. The stress and displacement in the domain of an element and the displacement on its boundary are simultaneously and independently approximated using sets of complete and linearly independent non-nodal Legendre polynomials. The element geometry is given in terms of its corner and mid-edge points using the same interpolation functions of the traditional isoparametric 20-node brick element. Symmetric, highly sparse and well conditioned solving systems are obtained. Numerical tests are carried out using h- and p-refinements to assess the behavior of these new hexahedrons.
引用
收藏
页码:245 / 256
页数:12
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