Abstract
In order to reduce the computational cost of multi-objective optimization (MOO) with expensive black-box simulation models, an intelligent sampling approach (ISA) is proposed with the guidance of the adaptive weighted-sum method (AWS) to construct a metamodel for MOO gradually. The initial metamodel is built by using radial basis function (RBF) with Latin Hypercube Sampling (LHS) to distribute samples over the design space. An adaptive weighted-sum method is then employed to obtain the Pareto Frontier (POF) efficiently based on the metamodel constructed. The design variables related to extreme points on the frontier and an extra point interpolated between the maximal-minimal-distance point along the frontier and the nearest boundary point are selected as the concerned points to update the metamodel, which could improve the metamodel accuracy gradually. This iterative updating strategy is performed until the optimization problem is converged. A series of representative mathematical examples are systematically investigated to demonstrate the effectiveness of the proposed method, and finally it is employed for the design of a bus body frame.
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Acknowledgements
This work is supported by the National Natural Science Foundation of China (NO. 51575044), the Science and Technology Planning Project of Beijing City (NO. Z161100001416007) and the National Key R&D Program of China (NO. 2017YFB0103801).
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Lin, C., Gao, F. & Bai, Y. An intelligent sampling approach for metamodel-based multi-objective optimization with guidance of the adaptive weighted-sum method. Struct Multidisc Optim 57, 1047–1060 (2018). https://doi.org/10.1007/s00158-017-1793-2
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DOI: https://doi.org/10.1007/s00158-017-1793-2