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引导波在变厚板上的声学阴影区域

Zhiyuan Zhang¹, Bing Li¹, Yanqi Wang¹

¹National Key Lab of Aerospace Power System and Plasma Technology, Xi'an Jiaotong University, Xi'an, China.

|March 12, 2024

概括

在变化厚度板中的引导波由于路径曲而造成声学阴影区域. 这种由频率和厚度影响的现象会影响桥梁和船舶等结构的非破坏性测试准确性.

科学领域:

声学声学在声学方面
材料科学材料科学材料科学
非破坏性测试不破坏性测试

背景情况:

在桥梁和船舶中,可变厚的板块是常见的.
导波对于这些结构的非破坏性测试至关重要.
厚度变化引发速度梯度,影响波浪传播.

研究的目的:

计算和实验验证在通过可变厚板的引导波传播中的声学阴影区域.
为了研究频率和厚度变化的影响引导波径曲.
为了证明曲线传播路径对NDT准确性的影响.

主要方法:

导向波传播路径在变厚板上的分析计算.
计算路径和声影区域的实验验证.
在实践场景中分析引导波行为的案例研究分析.

主要成果:

厚度的变化导致引导波向较低的相位速度倾斜.
频率和厚度的变化显著影响路径曲.
一个声学阴影区域,包括高达25%的路径,被实验观察到.
在板块非边界处观察到引导波的反向传播.

结论:

该研究成功计算并验证了在变厚板中的引导波的曲线传播路径和声学阴影区域.
了解曲线路径可以提高定位准确度,用于在这些结构中检测损坏.
这项研究推进了对可变厚度元件的NDT中引导波的应用.

关键词:

声学阴影区域是一个声学阴影区域.曲线的传播路径曲线的传播路径导向波浪的导向波浪是指导波浪的导向波.非破坏性测试是指非破坏性测试.不同厚度的板块可以变化.

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