高级泄漏的Lamb波敏度是液体浸泡板上的一个口
Simen Hammervold Midtbø1, Svein-Erik Måsøy1, Magne Aanes2
1NTNU, Høgskoleringen 1, Trondheim, 7491, Norway.
Ultrasonics
|December 16, 2023
概括
这项研究引入了一种新的超声波方法,用于使用更高阶的Lamb模式检测管道裂. 在S2模式中,突破口的灵敏度和检测性都更高,为优化检查系统铺平了道路.
科学领域:
- 材料科学 材料科学 材料科学
- 非破坏性测试 不破坏性测试
- 超声波波传播的超声波传播
背景情况:
- 管道裂检测的传统超声波方法主要使用基本的Lamb模式 (A0,S0).
- 高级Lamb模式在超声波检查中提供了提高灵敏度和缺陷特征的潜力.
研究的目的:
- 为了研究更高阶的Lamb模式 (S1,S2,A3) 对于检测管道裂的有效性.
- 开发和验证一个计算效率高的理论模型,以优化超声波检查系统.
主要方法:
- 使用了pitch-catch超声波设置与正常发生的传感器来激发更高阶的Lamb模式.
- 通过测量漏电波组件和隙灵敏度来量化裂纹检测性能.
- 开发了基于角光谱法 (ASM) 和地震灵敏度核的理论模型.
主要成果:
- 在S2 Lamb模式中,漏电频率组件最大,测试钢板中对口的灵敏度最高.
- 开发的基于ASM的模型准确地预测了实验测量,验证了它的实用性.
- 由于S2模式在最大泄漏频率附近的灵敏度,可以轻松检测裂纹引起的差异.
结论:
- 高级Lamb模式,特别是S2,为改进超声波管道裂检测提供了有希望的替代方案.
- 经过验证的理论模型可以实现高效的系统设计和优化,以提高检查能力.
- 这种方法有助于检测较小的缺陷,并提高管道完整性评估的可靠性.
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