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Multi-Disciplinary Risk-Adaptive Design of Super-Cavitating Hydrofoils

机译:超空腔水翼的多学科风险 - 自适应设计

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The paper presents a multi-disciplinary framework for design under uncertainty that leverages surrogate models trained using risk-adaptive statistical learning. We consider multiple competing quantities of interest coming from two different disciplines and describing the hy-drodynamic as well as structural features of a hydrofoil. The surrogates predict superquantile risk (s-risk) of quantities of interest, which adapt to the risk averseness level of a particular design stage. In order to construct accurate surrogate models we leverage two computational frameworks for both hydrodynamic and solid mechanic analysis. Each framework provides data at low- and high-fidelity levels through a multi-resolution approach for the hydrodynamic (RANS at high and low resolution) and a multi-fidelity approach for the solid mechanic predictions (full 3D and a simple beam). The framework is demonstrated through the design of a complex super-cavitating hydrofoil, but the method is generally applicable to the design complex physical system under uncertainty.
机译:本文提出了设计不确定性下的一个多学科的框架,利用替代模型的使用风险自适应统计学习培训。我们认为感兴趣的多个相互竞争的数量从两个不同的学科来和描述水翼的HY-drodynamic以及结构特征。该代理人预测的利息量,其适应特定设计阶段的风险厌恶水平的superquantile风险(S-风险)。为了构建精确的替代模型,我们利用两个流体力学和固体力学分析两个计算框架。每个框架通过用于流体动力学(在高和低分辨率RANS)和用于固体力学预测(全3D和一个简单的光束)的多保真度的方法的多分辨率方法提供在低和高保真水平的数据。该框架通过一个复杂超空泡水翼的设计表现出来,但该方法普遍适用于在不确定性下设计复杂的物理系统。

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