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Application of Simplified Load Path Models for BIW Development
Technical Paper
2019-01-0614
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Simplified load path models (SLMs) of the body in white (BIW) are an important tool in the body structure design process providing a highly flexible, idealized concept model to explore the design space through load path evaluation, material selection, and section optimization with rapid turnaround. In partnership with Altair Engineering, the C123 process was used to create and optimize SLMs for BIW models at FCA US LLC. These models help structures engineers to develop efficient load paths, sections, and joints for improved NVH as ultra-high-strength steels enable thinner gauges throughout the body structure. A few key differences in the SLM modeling method are contrasted to previous simplified BIW modeling methods. One such example is the parameterization of cross sections through response surface models rather than using contemporary finite element descriptions of arbitrary cross sections. Another difference is the modeling of structural joints as 1-D spring elements rather than high-fidelity shell models or superelements. To validate the new process, two BIW-level correlation studies are presented. The first study presents the correlation of an entire BIW SLM when compared to a high-fidelity shell model, and the second study uses a hybrid model approach, wherein the upperbody is comprised of an SLM and the underbody is a high-fidelity shell model. Both models’ normal mode and deflection global stiffness attributes correlated well to their high-fidelity, shell model counterparts. A case study of extending the rear header is explored on an SLM as an example of a typical use case for an SLM in a concept development environment. An optimization study is also performed on this model to understand and illustrate the benefits and effort required to provide optimized weight and performance data early in the vehicle’s development process.
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LeVett, M., Truskin, J., Zagorski, N., and Nelson, E., "Application of Simplified Load Path Models for BIW Development," SAE Technical Paper 2019-01-0614, 2019, https://doi.org/10.4271/2019-01-0614.Data Sets - Support Documents
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References
- Doke , P. , Fard , M. , and Jazar , R. Vehicle Concept Modeling: A New Technology for Structures Weight Reduction Procedia Engineering 49 287 293 2012
- Gui , C. , Bai , J. , and Zuo , W. Simplified Crashworthiness Method of Automotive Frame for Conceptual Design Thin-Walled Structures 131 324 335 2018 10.1016/j.tws.2018.07.005
- Moroncini , A. , Cremers , L. , and Baldanzini , N. Car Body Concept Modeling for NVH Optimization in the Early Design Phase at BMW: A Critical Review and New Advanced Solutions ISMA International Conference on Noise and Vibration Engineering 2012 Sep. 17-19, 2012
- Na , W. , Lee , S. , and Park , J. Body Optimization for Front Loading Design Process SAE Technical Paper 2014-01-0388 2014 10.4271/2014-01-0388
- Sung , S. and Nefske , D. Assessment of a Vehicle Concept Finite-Element Model for Predicting Structural Vibration SAE Technical Paper 2001-01-1402 2001 10.4271/2001-01-1402
- http://c123.altair.com/
- Liang , J. , Powers , J. , Stevens , S. , and Shahidi , B. A Method of Evaluating the Joint Effectiveness on Contribution to Global Stiffness and NVH Performance of Vehicles SAE Technical Paper 2017-01-0376 2017 10.4271/2017-01-0376
- Stigliano , G. , Mundo , D. Donders , S. , Tamarozzi , T. Advanced Vehicle Body Concept Modeling Approach Using Reduced Models of Beams and Joints ISMA International Conference on Noise and Vibration Engineering 2010 Sep. 20-22, 2010
- MSC NASTRAN Linear Static User’s Guide Los Angeles, CA The MacNeal-Schwendler Corporation 2018
- Brown , J. , Robertson , J. , and Serpento , S. Motor Vehicle Structures: Concepts and Fundamentals Warrendale SAE International 2002 120 122 076800909X