Penetrator Reliability Investigation and Design Exploration: From Conventional Design Processes to Innovative Uncertainty-Capturing Algorithms

摘要

This project focused on research and algorithmic development in optimization under uncertainty (OUU) problems driven by earth penetrator (EP) designs. While taking into account uncertainty, we addressed three challenges in current simulationbased engineering design and analysis processes. The first challenge required leveraging small local samples, already constructed by optimization algorithms, to build effective surrogate models. We used Gaussian Process (GP) models to construct these surrogates. We developed two OUU algorithms using local GPs (OUULGP) and one OUU algorithm using global GPs (OUUGGP) that appear competitive or better than current methods. The second challenge was to develop a methodical design process based on multiresolution, multifidelity models. We developed a MultiFidelity Bayesian Autoregressive process (MFBAP). The third challenge involved the development of tools that are computational feasible and accessible. We created MATLAB and initial DAKOTA implementations of our algorithms.