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arXiv 1601.02640math.NAcs.NAmath.OCmath.STstat.TH
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高维随机设计优化的自适应稀疏多项式维度分解

High-Dimensional Stochastic Design Optimization by Adaptive-Sparse Polynomial Dimensional Decomposition

The University of Iowa(爱荷华大学);Georgia Southern University(佐治亚南方大学);San Diego State University(圣地亚哥州立大学)

Sharif Rahman, Xuchun Ren, Vaibhav Yadav

AI总结:

本文提出了一种自适应稀疏多项式维度分解方法,用于复杂系统的随机设计优化,通过结合自适应稀疏PDD近似与分数函数,提高了统计矩和可靠性分析的效率,展示了在工程问题中的应用潜力。

摘要:

本文提出了一种新颖的自适应稀疏多项式维度分解(PDD)方法,用于复杂系统的随机设计优化。该方法包括对高维随机响应的自适应稀疏PDD近似,用于统计矩和可靠性分析;将自适应稀疏PDD近似与分数函数相结合,用于估计统计矩和失效概率的一阶设计灵敏度;以及标准梯度优化算法。新分析公式用于同时确定统计矩或失效概率的设计灵敏度。数学函数的数值结果表明,新方法比现有方法更具计算效率。最后,对具有79个变量的喷气发动机支架进行了随机形状优化,展示了该方法在解决实际工程问题中的强大能力。

英文摘要:

This paper presents a novel adaptive-sparse polynomial dimensional decomposition (PDD) method for stochastic design optimization of complex systems. The method entails an adaptive-sparse PDD approximation of a high-dimensional stochastic response for statistical moment and reliability analyses; a novel integration of the adaptive-sparse PDD approximation and score functions for estimating the first-order design sensitivities of the statistical moments and failure probability; and standard gradient-based optimization algorithms. New analytical formulae are presented for the design sensitivities that are simultaneously determined along with the moments or the failure probability. Numerical results stemming from mathematical functions indicate that the new method provides more computationally efficient design solutions than the existing methods. Finally, stochastic shape optimization of a jet engine bracket with 79 variables was performed, demonstrating the power of the new method to tackle practical engineering problems.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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