前沿 | 对推力室铣槽钎焊接头缺陷的激光超声波测试

IF 2.6 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY
Yuhang Chen, Xing Kou, Yu Liu, Cuixiang Pei, Zhenmao Chen
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引用次数: 0

摘要

本文介绍了一种利用激光超声波检测方法和合成孔径聚焦技术(SAFT)对推力室铣槽钎焊接头进行非接触式缺陷检测的新方法。首先,研究了推力室铣槽钎焊接头的激光超声波检测方法。随后,建立了数值模型来分析缺陷对激光激发信号的影响。分析结果表明,钎焊缺陷导致内波在肋骨表面反射,表现为缺陷回波信号先于外壁回波。通过扫描设置,获得的 SAFT 图像可直接、清晰地显示缺陷的存在。此外,还建立了一套实验系统,用于检测不同漏焊程度的人造缺陷并对其进行成像。实验结果与模拟结果一致,验证了检测和成像方法的能力和有效性。总体而言,所提出的激光超声方法具有非接触检测、高分辨率和高精度的固有优势,而且易于实现对推力室等大型复杂结构的快速和自动扫描,在提高液体火箭发动机的安全性和可靠性方面展示了其潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Frontiers | Laser ultrasonic testing of defects in milling groove brazed joints of thrust chamber
This paper presented a new approach for noncontact inspection of defects in milling groove brazed joints of thrust chamber with laser ultrasonic testing method and synthetic aperture focusing technique (SAFT). Firstly, laser ultrasonic testing methods for milling groove brazed joints of thrust chamber was studied. Subsequently, numerical models were constructed to analyze the influence of defects on laser-excited signals. The analysis revealed that the brazed defects caused internal waves to reflect on the rib surface, manifesting as defect echo signals preceding the outer wall echo. Through scanning setting, the obtained SAFT images illustrate the presence of the defect directly and clearly. Furthermore, an experimental system was established to detect and image artificial defects with different degrees of weld leakage. The experimental results are consistent with simulation results, validating the capability and effectiveness of the testing and imaging method. In general, the proposed laser ultrasound method offers inherent advantages of non-contact detection with high resolution and precision, and it is easy to achieve fast and automated scanning of large and complex structures like thrust chambers, demonstrating its potential for enhancing the safety and reliability of liquid rocket engines.
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来源期刊
Frontiers in Materials
Frontiers in Materials Materials Science-Materials Science (miscellaneous)
CiteScore
4.80
自引率
6.20%
发文量
749
审稿时长
12 weeks
期刊介绍: Frontiers in Materials is a high visibility journal publishing rigorously peer-reviewed research across the entire breadth of materials science and engineering. This interdisciplinary open-access journal is at the forefront of disseminating and communicating scientific knowledge and impactful discoveries to researchers across academia and industry, and the public worldwide. Founded upon a research community driven approach, this Journal provides a balanced and comprehensive offering of Specialty Sections, each of which has a dedicated Editorial Board of leading experts in the respective field.
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