A Progressive Trigonometric Mixed Response Surface Method for Double-Loop Interval Optimization

For some highly nonlinear problems, the general second-order response surface method (RSM) cannot satisfy accuracy requirement. To improve accuracy, highest order number has to be determined in advance. Thus, a progressive trigonometric mixed (PTMRSM) was proposed enhance approximation and define number, rather than determining it After that, double-loop interval optimization process could constructed using this PTMRSM save time while maintaining when compared other experimental or computational methods. Unfortunately, traditional had issues with probability of reliable constraints. Then, for construction process, modified constraints were introduced. A more effective introduced addressing practical engineering problems approximate amended Two numerical test functions composite submersible hull performed verify effectiveness optimization.