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Methodological Approach for Reducing Computational Costs of Vehicle Frontal Crashworthiness Analysis by Using Simplified Structural Modelling

Schäffer, Michael and Sturm, Ralf and Friedrich, Horst E. (2017) Methodological Approach for Reducing Computational Costs of Vehicle Frontal Crashworthiness Analysis by Using Simplified Structural Modelling. International Journal of Crashworthiness. Taylor & Francis. DOI: 10.1080/13588265.2017.1389631 ISSN 1358-8265

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Official URL: http://www.tandfonline.com/loi/tcrs20

Abstract

A challenge in the design and optimisation of the vehicle front structures is the high computational costs required for crash analysis. A methodological approach to simplifying Finite Element (FE) vehicle models and crash barriers is presented in this paper. The methodology uses global deformation characteristics of structures which are obtained from the global crash model. For the simplification of the vehicle crash model, structural regions which sustain only elastic deformations during the frontal crash are replaced by kinematic numerical representations which describe both stiffness and load paths at the interface of the substituted structures. Verification studies of the simplified vehicle model show a very good agreement of the global and local structural response during the frontal crash. Further simplifications were applied to the offset deformable barrier (ODB) by replacing its detailed crushing behaviour by kinematic descriptions. Through the combined use of both simplified numerical representations, the computational cost of a Euro NCAP offset crash analysis can be reduced by around 92%. With the obtained time reduction, structural optimisation studies of the remaining structure can be conducted efficiently for the identification of weight reduction potentials.

Item URL in elib:https://elib.dlr.de/115470/
Document Type:Article
Title:Methodological Approach for Reducing Computational Costs of Vehicle Frontal Crashworthiness Analysis by Using Simplified Structural Modelling
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Schäffer, Michaelmichael.schaeffer (at) dlr.deUNSPECIFIED
Sturm, Ralfralf.sturm (at) dlr.deUNSPECIFIED
Friedrich, Horst E.horst.friedrich (at) dlr.deUNSPECIFIED
Date:9 November 2017
Journal or Publication Title:International Journal of Crashworthiness
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.1080/13588265.2017.1389631
Publisher:Taylor & Francis
ISSN:1358-8265
Status:Published
Keywords:Crashworthiness, Physical Surrogates, Simplified models, Multi-body system approach, Optimisation
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Terrestrial Vehicles (old)
DLR - Research area:Transport
DLR - Program:V BF - Bodengebundene Fahrzeuge
DLR - Research theme (Project):V - NGC Fahrzeugstruktur (old)
Location: Stuttgart
Institutes and Institutions:Institute of Vehicle Concepts
Deposited By: Schäffer, Michael
Deposited On:21 Nov 2017 13:36
Last Modified:06 Sep 2019 15:18

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