| Title | 3D mass-redistributed finite element method in structural-acoustic interaction problems |
| Authors | Li, Eric He, Z. C. Jiang, Yong Li, Bing |
| Affiliation | Hunan Univ, State Key Lab Adv Design & Mfg Vehicle Body, Changsha 410082, Peoples R China. Dalian Univ Technol, Sch Naval Architecture, State Key Lab Struct Anal Ind Equipment, 2 Linggong St, Dalian 116024, Peoples R China. Inst High Performance Comp, Dept Engn Mech, 1 Fusionopolis Way,Connix 138632, Singapore, Singapore. Peking Univ, LTCS, Beijing 100871, Peoples R China. Peking Univ, Dept Mech & Aerosp Engn, Coll Engn, Beijing 100871, Peoples R China. |
| Keywords | METHOD ALPHA-FEM HELMHOLTZ-EQUATION DISPERSION ERROR ES-FEM FORMULATION SIMULATION MECHANICS POLLUTION FORM |
| Issue Date | 2016 |
| Publisher | ACTA MECHANICA |
| Citation | ACTA MECHANICA.2016,227,(3),857-879. |
| Abstract | A 2D mass-redistributed finite element method (MR-FEM) for pure acoustic problems was recently proposed to reduce the dispersion error. In this paper, the 3D MR-FEM is further developed to solve more complicated structural-acoustic interaction problems. The smoothed Galerkin weak form is adopted to formulate the discretized equations for the structure, and MR-FEM is applied in acoustic domain. The global equations of structural-acoustic interaction problems are then established by coupling the MR-FEM for the acoustic domain and the edge-based smoothed finite element method for the structure. The perfect balance between the mass matrix and stiffness matrix is able to improve the accuracy of the acoustic domain significantly. The gradient smoothing technique used in the structural domain can provide a proper softening effect to the "overly-stiff" FEM model. A number of numerical examples have demonstrated the effectiveness of the mass-redistributed method with smoothed strain. |
| URI | http://hdl.handle.net/20.500.11897/437640 |
| ISSN | 0001-5970 |
| DOI | 10.1007/s00707-015-1496-y |
| Indexed | SCI(E) EI |
| Appears in Collections: | 工学院 |
