کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
498321 | 862987 | 2012 | 17 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: A stabilized finite element method for certified solution with bounds in static and frequency analyses of piezoelectric structures A stabilized finite element method for certified solution with bounds in static and frequency analyses of piezoelectric structures](/preview/png/498321.png)
This paper develops a stabilization procedure in piezoelectric media to ensure the temporal stability of node-based smoothed finite element method (NS-FEM), and applies it to obtain certified solution with bounds in both static and frequency analyses of piezoelectric structures using three-node triangular elements. For such stabilized NS-FEM, two stabilization terms corresponding to squared-residuals of two equilibrium equations, i.e., mechanical stress equilibrium and electric displacement equilibrium, are added into the smoothed potential energy functional of the original NS-FEM. A gradient smoothing operation is then performed on second-order derivatives of shape functions to achieve the stabilization terms. Due to the use of divergence theory, the smoothing operation relaxes the requirement of shape functions, so that the square-residuals can be evaluated using linear elements. The effectiveness of the present stabilized NS-FEM is demonstrated via numerical examples.
► A stabilization technique has been developed for piezoelectric media.
► The stabilized technique suppresses the “overly soft” effect.
► The stabilized technique ensures the temporal stability of the original NS-FEM.
► The stabilized NS-FEM produces an upper bound solution in energy norm.
► Natural frequencies with lower bound can be achieved by the stabilized NS-FEM.
Journal: Computer Methods in Applied Mechanics and Engineering - Volumes 241–244, 1 October 2012, Pages 65–81