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Simulations with LS-DYNA for Registration Approval of a Coach according to ECE R66 Regulation

Schwartz, Wolfgang and Kvocic, Ch. and Lesti, Klaus and Schott, Klaus and Vaculin, Ondrej (2004) Simulations with LS-DYNA for Registration Approval of a Coach according to ECE R66 Regulation. 22nd CAD-FEM Users' Meeting 2004, 2004-11-10 - 2004-11-12, Dresden.

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Abstract

During the last years the increasing number of fatal coach accidents with tragic consequences for passengers showed the importance of passive safety in addition to the driver’s competence and active safety. In the European countries the certification of sufficient deformation strength when overturning is compulsory for the approval of a coach according to the ECE R66 regulation. The certification is granted after positive results from crash tests or computer simulations with partial or full bus structure. The ECE R66 regulation defines a survival space for the passengers which must remain intact after the accident. The tests specify either the overturning of the vehicle structure from a tilting platform or the impact of a plate on the coach structure as it would correspond to the crash of the structure when falling onto the ground. Since such tests with real vehicle structures are costly and computer efficiency, on the other hand, is becoming increasingly better and cheaper, crash simulations will play a more important role for the approval in the future. This paper will present different LS-DYNA – time simulations of the overturning test with a segment of a bus structure according to ECE R66 and time simulations with a pivoted plate hitting with the same kinetic energy against the structure as the model falling from the tilting platform and crashing onto the floor. Several modelling configurations with deformable and rigid undercarriage, with different friction coefficients of the contact ground-structure, are simulated. These calculations shall serve as a preparation for future calculations to obtain the necessary certification. Unfortunately no experimental results are available at present to enable the comparison between hardware test and computer simulation. However, the experience gained with tilting tests of similar coach structures in the past indicates the trustworthiness of the calculations. As these experiences are published on the panel of a users’ meeting, this paper goes more then usual into detail regarding the modelling and the difficulties in simulations which the authors, until that time unfamiliar with LS-DYNA, has to overcome. A short introduction to the variable test possibilities explained in regulation ECE R66 is given.

Document Type:Conference or Workshop Item (Speech, Paper)
Additional Information:LIDO-Berichtsjahr=2005,
Title:Simulations with LS-DYNA for Registration Approval of a Coach according to ECE R66 Regulation
Authors:
AuthorsInstitution or Email of Authors
Schwartz, WolfgangUNSPECIFIED
Kvocic, Ch.Ing.-Büro Zoellner-Lesti
Lesti, KlausIng.-Büro Zoellner-Lesti
Schott, KlausUNSPECIFIED
Vaculin, OndrejUNSPECIFIED
Date:2004
Status:Published
Keywords:LS-DYNA, crash simulations, approval of coach structure, ECE R66, tilting and pendulum tests
Event Title:22nd CAD-FEM Users' Meeting 2004
Event Location:Dresden
Event Type:international Conference
Event Dates:2004-11-10 - 2004-11-12
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:V SH - Verbesserung der Sicherheit im Verkehr (old)
DLR - Research area:Transport
DLR - Program:V SH - Verbesserung der Sicherheit im Verkehr
DLR - Research theme (Project):V - ViFa (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Robotics and Mechatronics > System Dynamics and Control (former Control Design Engineering)
Deposited By: Monika Klauer
Deposited On:21 Jul 2006
Last Modified:12 Dec 2013 20:02

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