• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2022, Vol. 58 ›› Issue (16): 403-419.doi: 10.3901/JME.2022.16.403

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Comparative Studies of Surrogate Models Based on Multiple Evaluation Criteria

HE Xiwang1, YANG Liangliang1, RAN Renjie2, ZHU Fawen2, SONG Xueguan1   

  1. 1. School of Mechanical Engineering, Dalian University of Technology, Dalian 116024;
    2. Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu 610213
  • Received:2021-03-12 Revised:2021-07-20 Online:2022-08-20 Published:2022-11-03

Abstract: The surrogate model refers to the use of limited sample information to establish the mathematical relationship between structural input and output, and it is increasingly used in the structural and multidisciplinary design optimization of complex equipment. With the purpose of obtaining performance effect of different approximate models in place of simulation analysis or physical test, systematic comparative analysis of approximate model for 38 test functions is carried out. Research the prediction accuracy of each model is calculated with the condition of different sample sizes, different nonlinearity degrees and different dimensions, and the computational time of different test functions on the model is also analyzed. Finally, two engineering examples are used to compare the predictive performance of the different approximate models. The results show that traditional approximate model (Polynomial Regression Surface, Radial Basis Function, Support Vector Regression, Kriging) maintain better prediction performance in engineering analysis without parameter optimization of the model. The accuracy of support vector regression (SVR) is better than other algorithm under most test functions. Radial basis function (RBF) has the best robustness in high non-linearity problems while random forest (RF) shows better robustness in low non-linearity. Thus, for different regression problems using suitable models can further improve the prediction accuracy and efficiency for different situations, which has guiding significance for studying the application of regression algorithm in the field of optimization design.

Key words: surrogate model, model comparison, degree of non-linearity, multiple evaluation criteria, optimization design

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