Phung Van Phuc, Nguyen Thoi Trung,
Journal of Science and Technology, 2011, Volumn 49, No 4A, pp 135-145
A n-sided polygonal edge-based smoothed FEM (nES-FEM) is extended to the dynamic analysis of 2D fluid-solid interaction problems based on the pressure-displacement formulation. The gradient smoothing technique based on smoothing domains associated with edges of the polygonal is used to smooth both gradient of pressure and gradient of displacement. This gradient smoothing technique can provide proper softening effect and thus improve significantly the accuracy of solution of coupled system. Some numerical examples are presented to illustrate the effectiveness of the nES-FEM compared with some existing methods for 2D fluid-solid interaction problems.
Keywords: n-sided polygonal edge-based smoothed finite element method (nES-FEM), finite element method, fluid-solid interaction problems, gradient smoothing technique, dynamic analysis.