基于扰动律的分位数指标的灵敏度分析及其在工业实例中的应用
Sensitivity analysis using perturbed-law based indices for quantiles and application to an industrial case
摘要:
在本文中,我们提出了扰动的法律为基础的敏感性指标,以及如何适应分位数为导向的灵敏度分析。我们展示了一个简单的方法来计算这些指数在实践中使用的分位数的重要性抽样估计。文中还给出了一些有用的渐近结果。最后,我们应用这种方法的数值模型,模拟在液压系统中的严重瞬态solicitations的情况下的一个组件的行为的研究。灵敏度分析用于评估一些物理参数的认知不确定性对模型输出的影响。
英文摘要:
In this paper, we present perturbed law-based sensitivity indices and how to adapt them for quantile-oriented sensitivity analysis. We exhibit a simple way to compute these indices in practice using an importance sampling estimator for quantiles. Some useful asymptotic results about this estimator are also provided. Finally, we apply this method to the study of a numerical model which simulates the behaviour of a component in a hydraulic system in case of severe transient solicitations. The sensitivity analysis is used to assess the impact of epistemic uncertainties about some physical parameters on the output of the model.
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