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Automated generation of physical surrogate vehicle models for crash optimization

Schäffer, Michael and Sturm, Ralf and Friedrich, Horst E. (2018) Automated generation of physical surrogate vehicle models for crash optimization. International Journal of Mechanics and Materials in Design. DOI: 10.1007/s10999-018-9407-8 ISSN 1569-1713

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Abstract

A challenge in the design and optimization of vehicle structures is the high computational costs required for crash analysis. In this paper an automated model generation for simplified vehicle crash models is presented. The considered crash load cases are the US NCAP (100 %, 56 km/h), the Euro NCAP (40 %, 64 km/h) and the IIHS Small Overlap (25 %, 64 km/h). The generation of the physical surrogate vehicle models is based on different sub-steps which were automated using a process chain. With this process chain it is possible to evaluate very efficiently the influence of structural modifications on the global crash behavior. During the model generation the crash behavior of the surrogate model is directly compared with the full vehicle model to enable a direct assessment of the model quality. Since the interface, where the model is cut, is an important factor for the obtained correlation, different interface positions were analysed. With obtained solutions it is possible to identify the interface position, which fulfils the required correlation by a given computational time. Additionally, the interface discretisation is analyzed to identify the model configuration with the highest correlation. This investigation was performed for three different vehicle models.

Item URL in elib:https://elib.dlr.de/120907/
Document Type:Article
Title:Automated generation of physical surrogate vehicle models for crash optimization
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:29 June 2018
Journal or Publication Title:International Journal of Mechanics and Materials in Design
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.1007/s10999-018-9407-8
ISSN:1569-1713
Status:Published
Keywords:Crashworthiness, Physical Surrogates, Simplified Models, Automated Model Generation, Optimization, Computational Time
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 > Vehicle Architectures and Lightweight Design Concepts
Deposited By: Schäffer, Michael
Deposited On:16 Aug 2018 10:28
Last Modified:01 Sep 2019 03:00

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