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Investigation on improved preliminary sizing processes of aircraft structures under dynamic loads

Geier, Martin and Bronstein, Michael and Kling, Alexander (2013) Investigation on improved preliminary sizing processes of aircraft structures under dynamic loads. 17th International Conference on Composite Structures (ICCS17), 17. - 21. Juni 2013, Porto, Portugal.

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Abstract

In order to consider a large number of design loads within the preliminary sizing process of aircraft structures in reasonable computational times, typically dynamic simulations are performed using simple stick models. These models consist of FE beam elements and concentrated. For the preliminary sizing, the dynamic internal loads obtained from the dynamic simulations are converted to static load sets that are applied to a detailed 3D FE representation of the aircraft. The combination of using the simple stick model as well as the conversion of the dynamic internal loads to static load sets leads to rather conservative designs. In this paper, an improved preliminary sizing process for dynamic load cases is presented. Two enhanced design processes are described, utilized and finally compared to the current design process. The used case for this study is built up by a generic aircraft which is subjected to different landing load cases. The first improvement of the design process removes the usage of static load sets for the preliminary sizing, while still allowing to utilize a simple stick model for the dynamic simulations. The second improvement also removes the stick model in the dynamic simulations and replaces it with a detailed 3D representation of the aircraft. In order to assess the potential weight savings, the stress distributions throughout the fuselage of the generic aircraft are studied and compared to each other.

Item URL in elib:https://elib.dlr.de/83474/
Document Type:Conference or Workshop Item (Speech)
Title:Investigation on improved preliminary sizing processes of aircraft structures under dynamic loads
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Geier, MartinUNSPECIFIEDUNSPECIFIED
Bronstein, MichaelIsrael Aerospace IndustriesUNSPECIFIED
Kling, AlexanderUNSPECIFIEDUNSPECIFIED
Date:June 2013
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:preliminary aircraft design, dynamic loads
Event Title:17th International Conference on Composite Structures (ICCS17)
Event Location:Porto, Portugal
Event Type:international Conference
Event Dates:17. - 21. Juni 2013
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L - no assignment
DLR - Research theme (Project):L - no assignment (old)
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Structural Mechanics
Deposited By: Böhringer-Thelen, Isolde
Deposited On:15 Aug 2013 11:59
Last Modified:15 Aug 2013 11:59

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