01.1 - Aircraft Design and Integrated System (Basics and Theory)
NUMERICAL MODELING OF FLUID-STRUCTURE INTERACTION OF A 3D WEDGE DURING WATER IMPACT WITH VARIATION OF VELOCITY AND PITCH ANGLE
F. Valpianiš, P. Cicoliniš, D. Espostoš, A. Gallettiš, D. Guagliardoš; šPolitecnico di Torino, Italy
Dynamic interactions related to structures impacting in water are a very complex problem to simulate numerically due to the multi-physics interaction between fluid and structure. Seaplanes, racing boats, re-entry module, and transport aircraft ditching are some examples of the areas that could benefit from Fluid-Structure Interaction (FSI) analyses. rnThe aim of the present work is to extend the previously analysed scenarios of the three-dimensional structure (Fig. 1) by investigating the effects of water impacts with different initial conditions. In detail, it has been investigated the influence of horizontal velocity and pitch angle on the pressures developed in seaplane hulls during typical water landing conditions. The nominal reference conditions have been achieved from the work of the Flight Mechanics section of teams55. These landing conditions are then manipulated to generate a full impact case study useful to the investigation of possible structural failure criteria. rnThe results of this kind of investigation would provide a better understanding of the impact phenomenon and enhance the structural design of the components in contact with water and subject to the impact generated stresses. rn