Numerical Simulation of Fluid-Structure Interaction on Wedge Slamming Impact Using Particle Method

This paper presents a fully Lagrangian coupled Fluid-Structure Interaction (FSI) solver for simulations of fluid-structure interactions, which is based on the Moving Particle Semi-implicit (MPS) method to solve the governing equations corresponding to incompressible flows as well as elastic structures. The developed solver is verified by reproducing the high velocity impact loads of deformable thin wedges with three different materials such as mild steel, aluminium and tin during water entry. The present simulation results for aluminium are compared with analytical solution derived from the hydrodynamic Wagner model and linear Wan’s theory. And also, the impact pressure and strain on the water entry wedge with three different materials, such as mild steel, aluminium and tin, are simulated and the effects of hydro-elasticity are discussed.

Authors:

• Sung-Chul Hwang
• Di Ren
• Sang-Moon Yoon
• Jong-Chun Park
• Abbas Khayyer
• Hitoshi Gotoh

Keywords:

• Fluid-structure interaction (FSI)
• Moving Particle Semi-implicit (MPS) method
• Elastic structure
• Incompressible fluid Wedge slamming impact.

References:

[1] G. Oger, L. Brasset, P. M. Guilcher, E. Jacquin, J. B. Deuff, and D. Le
Touze, “Simulation of hydro-elastic impacts using a parallel SPH model,”
Proceeding of ISOPE, 2009, pp. 316-324.
[2] Y. Yamada, T. Takami, and M. Oka, “Numerical Study on the Slamming
Impact of Wedge Shaped Obstacles considering Fluid- Structure
Interaction (FSI),” International Offshore and Polar Engineering
Conference, Rhodes, Greece, 2012, pp.1008-1016.
[3] S. Koshizuka, and T. Oka, “Moving-particle semi-implicit method for
fragmentation of incompressible fluid,” Nuclear Sci. and Engr., vol. 123,
no. 3, 1996, pp. 421-434.
[4] B. H. Lee, J. C. Park, M. H. Kim, and S. C. Hwang, “Step-by-step
improvement of MPS method in simulating violent free-surface motions
and impact loads,” Comput. Methods Appl. Mech. Engrg., vol. 200, no. 9,
2011, pp. 1113-1125.
[5] S. C. Hwang, A. Khayyer, H. Gotoh, and J. C. Park, “Development of a
fully Lagrangian MPS-based coupled method for simulation of fluid–
structure interaction problems,” Journal of Fluids and Structures, 2014,
vol. 50, pp. 497-511.
[6] F. Y. Wan, “On the equations of the linear theory of elastic conical
shells,” Stud. Appl. Math, vol. 49, no. 1, 1970, pp. 69-83.
[7] Y. M. Scolan, “Hydroelastic behavior of a conical shell impacting on a
quiescent-free surface of an incompressible liquid,” Journal of Sound and
Vibration, vol. 277, 2004, pp. 163-203.