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Integrated Panel and Skeleton Automotive Structural Optimization
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English
Abstract
Previous work in structural optimization for the automotive structure has been limited to beam models of the major load-carrying structure. This was primarily done to reduce the amount of computer resources required to minimize the mass. In this study, techniques necessary to include a moderately complex representation of the panels are developed in which some compromises between model fidelity and solution time must be accepted.
As an example, plate elements have been included in a vehicle structural optimization model to represent the roof, floor, dash, motor compartment, and rear quarter. Minimum mass designs subjected to stress, displacement, and frequency constraints are obtained by structural optimization. It was found that most panels were at minimum gage in the optimum design. This suggests that these panels are designed by local criteria as opposed to being controlled by global load and stiffness criteria. A few panels in the highly stressed areas are affected by the global load conditions and should be included in this portion of the optimization.
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Citation
Miura, H., Lust, R., and Bennett, J., "Integrated Panel and Skeleton Automotive Structural Optimization," SAE Technical Paper 811317, 1981, https://doi.org/10.4271/811317.Also In
References
- Bennett J. A. Nelson, M. F. “An Optimization Capability for Automotive Structres,” SAE Transactions 88
- Hafka R. T. Prasad, B. “Optimum Structural Design with Plate Bending Elements — A Survey,” AIAA Journal 9 4 517 522
- Schmit L. A. Miura, H. “An Advanced Structural Analysis/Synthesis Capability — ACESS-2,” Int. J. for Numerical Methods in Engineering 12 353 377 1978
- Connor J. Will, G. “A Triangular Plate Bending Element,” TR 68-3, Department of Civil Engineering, M.I.T. Cambridge 1968
- Fenyes, P. A. “Structural Optimization with Alternate Materials: Minimum Mass Design of the Primary Structure,” SAE paper 810228
- Lust R. V. Bennett, J. A. “Structural Optimization in the Design Environment,” Proceedings of 4th SAE International Conference on Vehicle Structural Mechanics,” 1981 Detroit, MI