Example of Using Smoothed Particle Hydrodynamic Method in the Design of Angler Fishing Float

One of the most popular meshless methods in engineering applications is SPH method, broadly used in the simulation of cutting process and fluid-structure interaction. Examples of this method usage, by a module implemented in the commercial software LS Dyna, are presented by authors. They are compared with experimental tests. In this publication are presented experimental and numerical results from observing the behaviour of the bodies during impact with water. The need to study this phenomenon resulted during the design process of an angler fishing float, which was developed and applied for patent protection by one of the co-authors. For this purpose, a station composed of a transparent water-filled tank attached to a force sensor was created and the numerical model was prepared. Bodies in the form of a SPHere, cube, cylinder, and cone of a constant volume of one litre each were immersed in water at a constant displacement of 100 mm, represented by a quadrant of sinus function at frequencies of 0.5 Hz, 1 Hz, 2 Hz and 3 Hz. The test was performed on a dynamic endurance machine manufactured by MTS 858 Table Top System. Parellely was developed the numerical model with water as SPH elements. Numerical analysis was performed on the mpp (massively parallel processor) version of LS Dyna R11 with the use of 3 nodes and 10 processors per node. Principles of the SPH method implemented in LS Dyna are described in the literature. The purpose of this article was to determine the influence of the body shape immersed in water on the value of the load recorded on the force transducer at the base of the tank. Additionally, estimation of the influence of frequency on loads was to notice. The paper presents the results of experimental studies, which were then compared with the results of numerical simulation.