重庆大学 航空航天学院
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国家自然科学基金项目（11632004, U1864208）；深空探测省部共建协同创新中心开放课题（SKTC202108）；国家科技重大专项项目（2017-VII-0011-0106）；河北省自然科学基金创新群体研究项目（A2020202002）；河北省重点研发计划（202030507040009）；天津市科技计划项目（20ZYJDJC00030）；天津市自然科学基金重点项目（S20ZDF077）.
College of Aerospace Engineering, Chongqing University
Supported by the Chinese National Natural Science Fund (Grant No.: 11632004, U1864208); Center of Space Exploration, Ministry of Education (SKTC202108); National Science and Technology Major Project (2017-VII-0011-0106); the Fund for Innovative Research Groups of Natural Science Foundation of Hebei Province (A2020202002); the Key Program of Research and Development of Hebei Province (202030507040009); Science and Technology Planning Project of Tianjin (20ZYJDJC00030) and the Key Project of Natural Science Foundation of Tianjin (S20ZDF077).
腐蚀损伤广泛存在于国防科技、交通运输等工业领域，严重威胁了结构的安全性和可靠性，因此对腐蚀损伤的安全检测具有重要意义。本文依据激光超声的基本理论，采用自主设计的全自动激光超声扫描实验系统，通过对铝板中的腐蚀损伤进行激光扫描实验，分析了Lamb波能量、幅值和腐蚀之间的关系，并依据“弹性波能流法”的原理，利用幅值最大值完成了损伤区域的可视化；提出了一种评估铝板腐蚀程度的方法——能量比较法，完成了对不同腐蚀程度的铝板的评估分析。该研究可实现腐蚀缺陷的快速检测与评估，并且检测结果直观可视，展现了巨大的应用前景。
Corrosion damage exists extensively in industries of national defense technology and transportation, which threatens seriously the safety and reliability of the structure. Therefore, it is of great significance to monitor corrosion damage for safety. In this paper, according to the theory of laser ultrasound, an automatic laser scanner detection experimental system is designed and developed. The laser scanning experiment was carried out on the corrosion damage in the aluminum plate through this system, and the relationship between the Lamb wave energy, amplitude and corrosion was analyzed, and visualize the damage area with the maximum amplitude according to the principle of "elastic wave energy flow method". Finally, we propose the amplitude integral ratio method, which can be used to evaluate the degree of corrosion damage, and the evaluation and analysis of aluminum plates with different corrosion degrees are completed. This research can realize the rapid detection and evaluation of corrosion defects, and the detection results are intuitive, showing a huge application prospect.
