|
| 超声兰姆波厚度共振模态的铝板应力测量方法* |
| Stress measurement for aluminum plates based on ultrasonic Lamb wave thickness resonance mode |
| 投稿时间：2025-03-12 修订日期：2025-05-12 |
| 中文摘要: |
| 金属薄壁结构的残余应力水平及其分布对其结构健康状态评估具有重要影响。本文基于超声兰姆波厚度共振模态开展了铝合金薄板的局部应力测量方法研究。首先，以兰姆波声弹性效应和零群速模态应力测量方法的前期研究为基础，进行了应力状态下厚度共振模态产生的有限元仿真。在频谱中发现了新的共振峰，并通过波数频率分析验证了S1/S2厚度共振模态的产生，且该厚度共振模态对应的幅值与应力水平之间存在显著的单调变化关系。进一步地，对厚度为3 mm的6061-T6铝合金进行了标准拉伸和超声测量实验，结果也证实了厚度共振模态的产生及其幅值随拉力单调变化规律，且这一变化规律与时间截取范围无关。本文所提出的超声兰姆波厚度共振模态应力测量方法，为金属薄壁结构应力的高灵敏、高可靠性检测提供了一种新途径。 |
| 英文摘要: |
| The residual stress level and distribution in metal thin-walled structures are crucial for assessing their structural health. This study explores a local stress measurement method for aluminum alloy plates using ultrasonic Lamb wave thickness resonance modes. Based on prior research on Lamb wave acoustoelastic effects and zero group velocity mode stress measurement, finite element simulations were conducted to analyze thickness resonance modes under stress. A new resonance peak was identified in the spectrum, and wavenumber-frequency analysis confirmed the generation of the S1/S2 thickness resonance mode. A significant monotonic relationship between the amplitude of this mode and stress level was established. Subsequently, standard tensile and ultrasonic measurements were performed on 3 mm thick 6061-T6 aluminum alloy specimens. The results validated the generation of the thickness resonance mode and the monotonic variation of its amplitude with tensile force, independent of the time window. The proposed ultrasonic Lamb wave thickness resonance mode stress measurement method offers a novel approach for highly sensitive and reliable stress detection in metal thin-walled structures. |
| DOI： |
| 中文关键词: 超声检测 兰姆波 厚度共振 零群速模态 应力测量 |
| 英文关键词: Ultrasonic testing Lamb wave Thickness resonance Zero-group velocity mode Stress measurement |
| 基金项目:内蒙古电力集团（有限）责任公司科技项目资助(内电科创[2024]5号)(项目名称:基于超声导波技术的输电杆塔接地体缺陷检测及状态评价方法研究与应用,项目编号:2024-4-44), 广东省自然科学基金项目(2022A1515240040) |
|
| 摘要点击次数: 45 |
| 全文下载次数: 0 |
|
查看/发表评论 下载PDF阅读器 |
| 关闭 |
