Journal
COMPUTATIONAL MATERIALS SCIENCE
Volume 49, Issue 3, Pages 500-511Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.commatsci.2010.05.041
Keywords
Honeycomb; Cellular materials, multi-fidelity optimization; Variable fidelity; Response surface method (RSM); Radial basis function (RBF); Crashworthiness
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Funding
- National 973 Project of China [2010CB328005]
- Program for Changjiang Scholar and Innovative Research Team in Chinese University
- National Science Foundation of China [60635020]
- China Scholarship Council (CSC)
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This paper presents a two-stage multi-fidelity (or named variable fidelity) method for surrogate models in honeycomb crashworthiness design. The high/low-fidelity analyses adopt fine/coarse finite element (FE) meshes, respectively. In Stage I, a correction response surface (RS) was constructed from the ratio or difference between high-fidelity and low-fidelity analyses at few sample points. In Stage II, the high-fidelity response is approximated via a radial basis function (RBF), either alone or incorporating with the correction RS model from Stage I. It is shown that the presented two-stage multi-fidelity model is more appropriate than any single-fidelity counterpart in the honeycomb optimization under the same computational cost. (C) 2010 Elsevier B.V. All rights reserved.
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