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Advances in Numerical Ditching Simulation of Flexible Aircraft Models

Siemann, Martin and Schwinn, Dominik and Scherer, Julian and Kohlgrüber, Dieter (2015) Advances in Numerical Ditching Simulation of Flexible Aircraft Models. In: Proceedings of ASIDIC2015. 2nd Aerospace Structural Impact Dynamics International Conference, 17. - 19. Nov. 2015, Sevilla, Spanien.

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Abstract

This paper deals with explicit numerical simulation of fixed-wing aircraft ditching using a coupled approach of Smoothed Particle Hydrodynamics and Finite Elements. Particular focus is put on recent advances toward simulation of flexible full aircraft models, which comprises significant challenges with respect to the numerical efficiency as well as the model complexity. First, the pursued numerical ap- proach is briefly presented. In order to deal with aforementioned challenges, an automated modular tool, which generates numerical models and launches ditching simulations, is presented. The paper provides a brief explanation of state-of-the-art aircraft as well as fluid modeling techniques used and furthermore presents an integrated model that computes aerodynamic loads during the simulation. The developed tool is used to conduct various numerical studies. First, the improved efficiency of such simulations over the state of the art is shown. Next, results of parameter studies are presented, demon- strating the effects of impact conditions on the aircraft motion. Finally, the structural deformation experienced during ditching of a detailed finite element aircraft model is analyzed and its effects on the aircraft motion are discussed.

Item URL in elib:https://elib.dlr.de/99890/
Document Type:Conference or Workshop Item (Speech)
Title:Advances in Numerical Ditching Simulation of Flexible Aircraft Models
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Siemann, MartinDLR BT-SINUNSPECIFIED
Schwinn, Dominikdominik.schwinn (at) dlr.deUNSPECIFIED
Scherer, JulianJulian.Scherer (at) dlr.deUNSPECIFIED
Kohlgrüber, DieterDieter.Kohlgrueber (at) dlr.deUNSPECIFIED
Date:17 November 2015
Journal or Publication Title:Proceedings of ASIDIC2015
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Aircraft ditching; Explicit numerical simulation; Fluid-structure interaction; Process chain; SPH-FE approach; Structural flexibility
Event Title:2nd Aerospace Structural Impact Dynamics International Conference
Event Location:Sevilla, Spanien
Event Type:international Conference
Event Dates:17. - 19. Nov. 2015
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Structures and Materials
Location: Stuttgart
Institutes and Institutions:Institute of Structures and Design > Structural Integrity
Deposited By: Siemann, Dr. Martin
Deposited On:14 Jan 2016 09:09
Last Modified:10 May 2016 23:35

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