一个理论模型来预测EMAT产生的圆柱形波导中的超声波信号
Xi Li1, Zhichao Li1, Shujuan Wang1
1School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, China.
Ultrasonics
|November 19, 2025
概括
一个新的理论模型使用电磁声学传感器 (EMAT) 预测气中的超声波信号. 这种高效的方法避免了复杂的有限元分析,提高了对圆柱状结构检查的计算速度.
科学领域:
- 物理 物理学 物理
- 材料科学 材料科学 材料科学
- 工程 工程师 工程师 工程师
背景情况:
- 在圆柱形结构中精确预测超声波信号对于非破坏性测试至关重要.
- 气中的电磁声学传感器 (EMAT) 的现有模型是有限的,阻碍了计算效率.
- 有限元 (FE) 方法虽然准确,但对于这些应用来说,它在计算上是密集的.
研究的目的:
- 开发一个计算效率高的理论模型,用于预测由EMATs激发的有限长度圆柱体中的超声波信号.
- 包含完整的EMAT操作,包括超声波的激发,传播和接收.
- 为分析圆柱形几何形状中的超声响应提供FE方法的替代方案.
主要方法:
- 通过Pochhammer-Chree理论来获得追踪脉冲的分析表达式,确定它们的起源在引导波叠加中.
- 开发了一个数字模型,使用模态分析来计算EMAT接收的时间域信号.
- 根据有限元模拟和实验数据验证了模型.
主要成果:
- 该模型准确地预测了超声波模式,波形,振幅和尾波周期性.
- 模型预测显示与FE模拟和实验结果有很强的一致性.
- 该模型在不同的EMAT参数中证明了有效性.
结论:
- 提出的理论和数值模型提供了一个快速而准确的方法来预测EMAT产生的和接收的气中的超声波信号.
- 与传统的FE分析相比,这种方法提高了计算效率.
- 这些发现有助于更好地解释圆柱形结构中的超声波反应.
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