03.4 - Applied Aerodynamics
MULTILEVEL COLLABORATIVE AERODYNAMIC DESIGN OPTIMIZATION BASED ON SOBOL’ GLOBAL SENSITIVITY ANALYSIS
C. Wang¹, Z. Gao¹, P. Liu¹, Y. Na¹, X. Zhu¹; ¹Northwestern Polytechnical University, China
Surrogate model combined with global optimization algorithm is necessary for design space exploration inrnaerodynamic shape optimization (ASO). However, the “curse of dimensionality” exists to a great extent in thosernglobal optimization algorithms. Multilevel collaborative optimization (MCO) method is studies to cope withrnhigh-dimensional optimization problems in this paper. The superiority of MCO method over traditional directrnfull-variables optimization method is confirmed through different test functions. In aerodynamic shapernoptimization, Sobol’ global sensitivity analysis is introduced to quantify the importance degrees of designrnvariables. The design variables are divided in to subcomponents according to their importance degrees and thernsubcomponents are optimized individually in multiple cycles. Finally, a commercial airplane in transonic regimernis optimized by MCO method and conventional method respectively. Results show that the proposed MCOrnmethod is better than conventional method.