实验验证零组速度特征在接接头中的引导波,使用与空气合超声波传感器的位捕捉测量技术进行实验验证
Xiangdi Meng1, Mingxi Deng1, Weibin Li2
1College of Aerospace Engineering, Chongqing University, Chongqing 400044, China.
Ultrasonics
|June 9, 2024
概括
这项研究通过空气合超声波在接接头中实验观察零组速度特征导向波 (ZGV-FGW). 这些发现证实了复杂结构中的ZGV-FGW,验证了检测它们的新方法.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 非破坏性测试是一种非破坏性测试.
背景情况:
- 零组速度 (ZGV) 羔羊波在超声波非破坏性测试中至关重要.
- 复杂结构中ZGV模式存在理论研究,但实验验证是有限的.
- 接接头具有复杂的结构,需要先进的检查技术.
研究的目的:
- 在接接头上实验观察和验证零组速度特征导向波 (ZGV-FGWs).
- 为了验证pitch-catch测量技术的有效性,使用空气合超声波传感器用于ZGV-FGW检测.
- 通过实验和模拟比较,确认ZGV-FGW在接接头中的共振频率.
主要方法:
- 使用空气合超声波传感器的位捕捉测量技术.
- 应用于各种频率的激发接联合样本.
- 执行短时间里叶变换 (STFT) 来分析时间域信号和光谱内容.
- 将实验共振频率与模拟结果进行比较.
主要成果:
- 使用采用的方法在基本弹性板中确认了ZGV Lamb波的存在.
- 从接接头接收的时间域信号中观察到长时间的振荡.
- 确定了对应于接接头中的共振频率的光谱振幅峰值.
- 在接接头中实验验证的ZGV-FGW,共振频率与模拟相匹配.
结论:
- 使用空气合超声波的调度捕获方法成功地激发和检测接接头上的ZGV-FGW.
- 实验证据证实ZGV-FGW在接接头等复杂结构中的存在.
- 这项研究为未来对复杂材料配置中ZGV-FGW的实验研究提供了基础.
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