在接接头的零组速度特征引导波的验证
Xiangdi Meng1, Mingxi Deng1, Weibin Li2
1College of Aerospace Engineering, Chongqing University, Chongqing 400044, China.
Ultrasonics
|October 11, 2023
概括
这项研究证实,使用先进的建模,在接接头中使用零组速度 (ZGV) 特性引导波 (FGW). 这些ZGV-FGW为复杂结构中的非破坏性测试提供了新的可能性.
科学领域:
- 固体机械学 固体机械学
- 波浪的传播方式
- 非破坏性测试是一种非破坏性测试.
背景情况:
- 零组速度 (ZGV) 羔羊波在弹性板上进行了充分的研究,用于非破坏性测试.
- 有限的研究存在于ZGV模式的复杂结构,如接接头.
研究的目的:
- 为了调查ZGV在接接头中的特征引导波 (FGW) 的存在和特征.
- 为了扩大对ZGV现象的理解,超越简单的弹性板.
主要方法:
- 二维 (2D) 有限元素 (FE) 建模以分析响应光谱和识别共振.
- 三维 (3D) 时间步骤 FE 方法来研究共振模式.
- 空间二维和短时间里叶变换用于信号分析.
- 半分析的有限元素方法,具有完美匹配的层,用于声场分析.
主要成果:
- 在接接头的响应光谱中发现了共振现象.
- 验证了非传播 (局部共振) 和传播模式.
- 接接头中的传播模式表现出零组速度 (ZGV) 特性.
- 在共振频率的特征引导波 (FGW) 中证实了ZGV特征,称为ZGV-FGWs.
结论:
- 在接接头中确立了ZGV-FGW的存在.
- 这项研究为未来对复杂结构部件中ZGV-FGW的研究提供了基础.
- 这些发现为先进的非破坏性测试应用开辟了新的途径.
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