This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Effect of Dummy Repeatability on Numerical Model Accuracy
Technical Paper
2007-01-1173
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
The vehicle design process for occupant safety is becoming more and more demanding. Design requirements defined by (new) regulations and consumer tests are continuously increasing in both stringency and complexity, making the optimization process for restraint systems increasingly complex. Virtual testing can make a valuable contribution to the design process, as it reduces development time. It also allows engineers to test for solution robustness and determine the sensitivities of the design parameters. For the virtual testing approach to be successful, simulations must be acceptable in terms of accuracy and efficiency.
MADYMO has introduced new Quality rated (Q) dummy models using advanced multi body techniques, in order to obtain short computation times combined with the geometry and accuracy of finite element models. Together with this new generation of numerical dummy models, objective rating methods have been introduced in the Quality reports that are delivered with the Quality rated dummy models.
The objective rating method is completely integrated in the numerical dummy design process. After two years of experience using this method, remarkable conclusions can be drawn. This paper will describe these conclusions both with respect to hardware repeatability and with respect to numerical model accuracy. For studying the repeatability of hardware dummies, the objective rating method was applied on the test signals from repeated tests. Two questions that are answered in this paper are (1): how should the numerical model address hardware repeatability issues and (2): what can be expected from the accuracy of numerical models when the variability in experimental results is considered?
Recommended Content
Authors
Citation
Twisk, D., Spit, H., Beebe, M., and Depinet, P., "Effect of Dummy Repeatability on Numerical Model Accuracy," SAE Technical Paper 2007-01-1173, 2007, https://doi.org/10.4271/2007-01-1173.Also In
SAE 2007 Transactions Journal of Passenger Cars: Mechanical Systems
Number: V116-6; Published: 2008-08-15
Number: V116-6; Published: 2008-08-15
References
- Hoof J. van Happee R. Puppini R. Baldauf H. Oakley C. “Extended occupant safety through virtual testing: Objectives of the European project VITES” International Mechanical Engineering Congress and Exposition of the American Society of Mechanical Engineers (ASME International) New York/USA 2001
- Hoof J van Puppini R. Baldauf H. Oakley C. Kayvantash K. “Adviser: A Software Tool for Evaluation and Rating of Numerical Models in Crash Safety Analyses” Paper 43. Proceedings of the 18 th ESV Conference 2003
- Jacob C. Charras, F. Troseille, X. Hamon J. Pajon, M. Lecoz, J.Y. “Mathematical Models Integral Rating” International Journal of Crashworthiness 5 4 2000
- Hovenga P.E. Spit H.H. Uijldert M. Dalenoort A.M. “Improved prediction of Hybrid-III injury values using advanced multibody techniques and objective rating.” SAE Paper 05AE-222 2005
- Code of Federal Regulations Title 49, Transportation, Part 572. Subpart E. 2005
- Davies O.L. Mills N.J. “The rate dependence of Confor PU foams” Cellular Polymers 18 2 117 136 1999
- Rausch, G. Lehmhus, D. “Passive Safety Related Materials” Report for the European Vehicle Passive Safety Network.
- Stammen, J.A Saul, R.A Ko, B. “Pedestrian head impact testing and PCDS reconstructions” Paper 326, Proceedings of the 17 th ESV Conference Amsterdam 2001
- United Nations Regulation ECE-R94 “Uniform provisions concerning the approval of vehicles with regard to the protection of the occupants in the event of a frontal collision” 1995
- EuroNCAP “Frontal Impact Testing Protocol” March 2004
- Code of Federal Regulations Title 49, Transportation, Part 571, Federal Motor Vehicle Safety Standards 1998
- TNO “MADYMO Database manual version 6.3” TNO Automotive Delft, The Netherlands 2005
- TNO “MADYMO Theory manual version 6.3” TNO Automotive Delft, The Netherlands 2005