Study on Evaluation System of Mechanical Properties of Coating Materials using Wavelet Analysis of Surface Wave

基于表面波小波分析的涂层材料力学性能评价体系研究

• 批准号: 11555027
• 负责人: KISHIMOTO Kikuo
• 金额: $ 1.15万
• 依托单位: TOKYO INSTITUTE OF TECHNOLOGY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B).
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11555027/
• 关键词: Ultrasonics; Rayleigh-like Waves; Lamb Waves; Coatings; Wavelet Transform; Optimization; Elastic Properties; 非破壊検査; コーディング層

Lamb waves and Rayleigh-like waves are often used for ultrasonic NDE of plates or coatings. The dispersive nature of these waves causes difficulties in excitation and detection of ultrasonic waves as well as in the analysis of detected signals. In this study, a contact-type line-focused transducer made of a quarter-cylindrical PMMA wedge with a PVDF film adhered to the wedge is developed. It is shown that dispersive waves in plates or coatings are successfully excited and detected by this transducer. Two techniques utilizing the wavelet transform are employed to determine the dispersion relation of Lamb or Rayleigh-like waves from detected signals. In addition, the elastic properties of plates or coatings are estimated from the dispersion relation by applying an optimization technique.

兰姆波和瑞利波常用于板材或涂层的超声无损检测。这些波的色散性质给超声波的激发和探测以及对探测信号的分析带来困难。在本研究中，开发了一种接触式线聚焦换能器，该换能器由四分之一圆柱形PMMA楔体与PVDF薄膜粘附在楔体上制成。结果表明，该换能器可以成功地激发和检测板或涂层中的色散波。利用小波变换的两种技术确定了检测信号中兰姆波或瑞利波的色散关系。此外，应用优化技术从色散关系估计了板或涂层的弹性性能。

项目成果

Hirotsugu Inoue, Kikuo Kishimoto, Toshikazu Shibuya: "NDE of Plates and Coatings using Contact-Type Line-Focus Ultrasonic Probe"Proc.10th Int.Sympo.Nondestructive Characterization of Materials. 455-456 (2000)

Hirotsugu Inoue、Kikuo Kishimoto、Toshikazu Shibuya：“使用接触型线聚焦超声波探头对板材和涂层进行 NDE”Proc.10th Int.Sympo.材料的无损表征。

Hirotsugu INOUE, Kikuo KISHIMOTO, Toshikazu SHIBUYA: "Inverse Analysis of Elastic Properties of Plates Based on Dispersion Relation of Lamb Waves"Preprint of Japan Society Mechanical Engineers Meeting. 99-5. 457-458 (1999)

Hirotsugu INOUE、Kikuo KISHIMOTO、Toshikazu SHIBUYA：“基于兰姆波色散关系的板的弹性特性反分析”日本机械工程师学会会议预印本。

H.Inoue: "NDE of Plates and Coating Using Contact-Type Line-Focus Ultrasonic Probe"Proc.10th.Int.Sympo.Nondestructive Characterization of Materials. 455-456 (2000)

H.Inoue：“使用接触型线聚焦超声波探头对板材和涂层进行 NDE”Proc.10th.Int.Sympo.Non什么呢？材料的表征。

H.Inoue: "NDE of Plates and Coating Using Contact-Type Line-Focus Ultrasonic Probe"Proc.10th Sympo.Nondestructive Characterization of Materials. 455-456 (2000)

H.Inoue：“使用接触型线聚焦超声波探头对板材和涂层进行 NDE”Proc.10th Sympo.材料的无损表征。

Hirotsugu INOUE, Kikuo KISHIMOTO, Toshikazu SHIBUYA: "NDE of Thin Plates using Contact-Type Line-Focus Ultrasonic Probe"Preprint of Japan Society Mechanical Engineers Meeting. 99-16. 293-294 (1999)

Hirotsugu INOUE、Kikuo KISHIMOTO、Toshikazu SHIBUYA：“使用接触型线聚焦超声波探头的薄板 NDE”日本机械工程师学会会议预印本。