FN Archimer Export Format
PT C
TI Assessment of Coupled Lagrangian–Eulerian Finite Element Simulations to Model Suction Forces during Hydrodynamic Impacts
BT 
AF GORON, Mathieu
   LANGRAND, BERTRAND
   FOUREST, THOMAS
   JACQUES, NICOLAS
   TASSIN, Alan
AS 1:1,2;2:1,3;3:1;4:2;5:4;
FF 1:;2:;3:;4:;5:PDG-REM-RDT-LHYMAR;
C1 DMAS, ONERA, France
   ENSTA Bretagne, France
   University Polytechnique Hauts-de-France, France
   IFREMER, France
C2 ONERA, FRANCE
   ENSTA BRETAGNE, FRANCE
   UNIV POLYTECH HAUTS DE FRANCE, FRANCE
   IFREMER, FRANCE
SI BREST
SE PDG-REM-RDT-LHYMAR
UR https://archimer.ifremer.fr/doc/00793/90510/96082.pdf
LA English
DT Proceedings paper
DE ;finite elements;fluid–structure interaction;Eulerian–Lagrangian coupling;water impact and exit;hydrodynamic forces;suction.
AB During the emergency landing of an aircraft on water, the structure may experience critical forces and could eventually fail. The appropriate design of the structure should minimize the risk of occupant injuries. The recent progress in computation capabilities led to the increased use of numerical simulations in the certification process of aircraft. A specific challenge concerns the modelisation of suction forces that develop near the aircraft tail, where the first contact with water occurs. This phenomenon is due to the high horizontal velocity of the structure at impact and the longitudinal curvature of the fuselage. It can affect the overall aircraft kinematics during ditching. In this work, as an effort to improve aircraft ditching simulations and to assess the capabilities of numerical models to describe suction forces, the simple test case of the wedge water entry and subsequent exit is considered. Numerical simulations with the Eulerian formulation for the fluid and the Lagrangian formulation for the structure are used. The method used for the fluid–structure interaction is based on an immersed contact interface with penalty forces. The present work focuses on impact and suction forces modelling. Results show a satisfying capacity of the numerical approach to model negative hydrodynamic force (suction). 
PY 2022
PD SEP
CT High Performance and Optimum Design of Structures and Materials V : Encompassing Shock and Impact Loading. WIT Transactions on The Built Environment. 2022. Edited By: S. Hernández, G. Schleyer. ISBN 978-1-78466-471-8 eISBN 978-1-78466-472-5. Volume 2019, pp.103-114
DI 10.2495/HPSU220101
ID 90510
ER

EF