4.7 Article

A note on the effect of material uncertainty on acoustic source localization error in anisotropic plates

期刊

ULTRASONICS
卷 119, 期 -, 页码 -

出版社

ELSEVIER
DOI: 10.1016/j.ultras.2021.106623

关键词

Material uncertainty; Wave front shape-based approach; Acoustic source localization; Time-of-arrival; Monte Carlo simulations; Global sensitivity analysis

向作者/读者索取更多资源

This study investigated the impact of material uncertainty on acoustic source localization, considering the propagation of elastic waves and estimation of source location using wave front shape-based methods. The results showed that, under lognormal distributions, uncertainty in the modulus of elasticity in the major direction has a greater effect on source localization accuracy.
The uncertainty in material properties of an anisotropic plate may influence the acoustic source localization process undertaken for the plate. To study this effect of material uncertainty, the two moduli of elasticity of an orthotropic plate material are considered in this note as independent random variables and the propagation of this material uncertainty through the wave front shape-based acoustic source localization approach is investigated. Assuming lognormal probability distributions for the two random variables, several design points in lognormal spaces are picked using Latin Hypercube Sampling. Finite element analysis is performed for each design point to simulate the elastic wave propagation due to an acoustic event and wave front shape-based approach is applied to estimate the source location. The time-of-arrivals and source localization errors obtained for each design point are considered as separate response functions at that design point and regression kriging metamodels through the responses at the design points are constructed. Monte Carlo simulations are carried out using these metamodels to obtain the distribution parameters (i.e., ranges, means and standard deviations) of the time-of-arrivals and localization errors. A global sensitivity analysis is performed to estimate the effect of each random variable on the localization errors. It is observed that for lognormally distributed moduli of elasticity with same coefficients of variation, uncertainty in the modulus of elasticity in the major direction affects the source localization accuracy more compared to the uncertainty in the modulus of elasticity in the minor direction, particularly when the ellipse-based technique is used.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据