Response of an Elastic Structure Subject to Air Shock Considering Fluid-Structure Interaction

2010 ◽  
Vol 23 (3) ◽  
pp. 176-185 ◽  
Author(s):  
Weimin Nian ◽  
Kolluru Subramaniam ◽  
Yiannis Andreopoulos
Keyword(s):  
Fluid Structure Interaction ◽  
Elastic Structure ◽  
Fluid Structure ◽  
Structure Interaction

A Hybrid Numerical Model to Address Fluid Elastic Structure Interaction

2016 ◽  
Author(s):  
Manoj Kumar Gangadharan ◽  
Sriram Venkatachalam
Keyword(s):  
Numerical Model ◽  
Fluid Structure Interaction ◽  
Breaking Waves ◽  
Elastic Structure ◽  
Navier Stokes ◽  
Breaking Wave ◽  
Ocean Engineering ◽  
Fluid Structure ◽  
Strongly Coupled ◽  
Structure Interaction

Hydroelasticity is an important problem in the field of ocean engineering. It can be noted from most of the works published as well as theories proposed earlier that this particular problem was addressed based on the time independent/ frequency domain approach. In this paper, we propose a novel numerical method to address the fluid-structure interaction problem in time domain simulations. The hybrid numerical model proposed earlier for hydro-elasticity (Sriram and Ma, 2012) as well as for breaking waves (Sriram et al 2014) has been extended to study the problem of breaking wave-elastic structure interaction. The method involves strong coupling of Fully Nonlinear Potential Flow Theory (FNPT) and Navier Stokes (NS) equation using a moving overlapping zone in space and Runge kutta 2nd order with a predictor corrector scheme in time. The fluid structure interaction is achieved by a near strongly coupled partitioned procedure. The simulation was performed using Finite Element method (FEM) in the FNPT domain, Particle based method (Improved Meshless Local Petrov Galerkin based on Rankine source, IMPLG_R) in the NS domain and FEM for the structural dynamics part. The advantage of using this approach is due to high computational efficiency. The method has been applied to study the interaction between breaking waves and elastic wall.

scholarly journals Fully Coupled Smoothed Particle Hydrodynamics-Finite Element Method Approach for Fluid–Structure Interaction Problems With Large Deflections

2019 ◽  
Vol 141 (8) ◽  
Author(s):  
A. Ersin Dinçer ◽  
Abdullah Demir ◽  
Zafer Bozkuş ◽  
Arris S. Tijsseling
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Numerical Method ◽  
Smoothed Particle Hydrodynamics ◽  
Fluid Structure Interaction ◽  
Elastic Structure ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Particle Hydrodynamics ◽  
Smoothed Particle

Abstract In this study, a combination of the smoothed particle hydrodynamics (SPH) and finite element method (FEM) solving the complex problem of interaction between fluid with free surface and an elastic structure is studied. A brief description of SPH and FEM is presented. Contact mechanics is used for the coupling between fluid and structure, which are simulated with SPH and FEM, respectively. In the proposed method, to couple mesh-free and mesh-based methods, fluid and structure are solved together by a complete stiffness matrix instead of iterative predictive–corrective or master–slave methods. In addition, fully dynamic large-deformation analysis is carried out in FEM by taking into account mass and damping of the elastic structure. Accordingly, a two-dimensional fluid–structure interaction (FSI) code is developed and validated with two different experiments available in the literature. The results of the numerical method are in good agreement with the experiments. In addition, a novel laboratory experiment on a dam break problem with elastic gate in which the length of the initial water column is larger than its height is conducted. The main difference between the previous experiments and the one conducted in this study is that an upward water motion parallel to the elastic gate is observed at the upstream side of the gate. This motion is captured with the numerical method.

A Boundary Element Method for Dynamic Analysis of Elastic Structures Subjected to Axial Flow

2006 ◽  
Author(s):  
Bahadir Ugˇurlu ◽  
Ahmet Ergin
Keyword(s):  
Boundary Element Method ◽  
Boundary Element ◽  
Potential Function ◽  
Fluid Structure Interaction ◽  
Axial Flow ◽  
Elastic Structure ◽  
Elastic Structures ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Element Method

A boundary element method is presented to investigate the dynamic behavior of elastic structures partially or completely in contact with uniform axial flow. In the analysis of the linear fluid-structure interaction problem, it is assumed that the fluid is ideal and its motion is irrotational. Furthermore, the elastic structure is assumed to vibrate in relatively high-frequencies, so the infinite frequency limit condition is imposed for fluid free surface, which is satisfied implicitly by using method of images. When in contact with the flowing fluid, the structure is assumed to vibrate in its in vacuo eigen-modes that are obtained by using a finite element software. The wetted surface of the structure is idealized by using appropriate hydrodynamic panels and a boundary element method is formulated for velocity potential function, which is taken as linearly varying over the panels. Using the Bernoulli’s equation, the dynamic fluid pressure on the elastic structure is expressed in terms of potential function, and the fluid-structure interaction forces are calculated as generalized added mass, hydrodynamic damping and hydrodynamic stiffness coefficients, due to the inertia, Coriolis and centrifugal effects of fluid, respectively. Solution of the eigenvalue problem associated with the generalized equation of motion gives the dynamic characteristics of the structure in contact with fluid. As an application of the method, the dynamics of a simply supported cylindrical shell subjected to internal flow is studied. The predictions compare quite well with the previous results in the literature.

Numerical simulation of fluid–structure interaction of compressible flow and elastic structure

Computing ◽  
2012 ◽  
Vol 95 (S1) ◽  
pp. 343-361 ◽  
Author(s):  
Jaroslava Hasnedlová ◽  
Miloslav Feistauer ◽  
Jaromír Horáček ◽  
Adam Kosík ◽  
Václav Kučera
Keyword(s):  
Numerical Simulation ◽  
Compressible Flow ◽  
Fluid Structure Interaction ◽  
Elastic Structure ◽  
Fluid Structure ◽  
Structure Interaction

scholarly journals Investigation of the Sloshing Behavior Due to Seismic Excitations Considering Two-Way Coupling of the Fluid and the Structure

Water ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 2664 ◽  
Author(s):  
A. Ersin Dinçer
Keyword(s):  
Fluid Structure Interaction ◽  
Elastic Structure ◽  
Seismic Excitations ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Near Fault ◽  
Fault Type ◽  
Particle Hydrodynamics ◽  
Smoothed Particle ◽  
Model Fluid

Sloshing behavior due to near-fault type and earthquake excitations of a fluid in a tank having a highly deformable elastic structure in the middle was investigated experimentally and numerically in this paper. In the numerical model, fluid was simulated with smoothed particle hydrodynamics (SPH) and structure was simulated with the finite element method (FEM). The coupling was satisfied with contact mechanics. The δ-SPH scheme was adapted to lower the numerical oscillations. The proposed fluid-structure interaction (FSI) method can simulate the violent fluid-structure interaction problem successfully. The effects of near-fault type and earthquake excitations on free-surfaces of fluid and the elastic structure are presented.

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