Structural Damage Identification Technology of Manned Submersible Based on Vibration Test
-
摘要: 针对大深度载人潜水器复杂结构系统在甲板上带载情况下进行快速损伤识别的技术难点，将振动测试的方法引入到载人潜水器的结构损伤识别中，提出了一种用于载人潜水器结构损伤识别的快速评估方法。利用离散二进小波变换对振动响应信号中叠加的模态信息进行分离，然后通过小波包变换得到能量值，结合两者定义了损伤联合评估方法的损伤指标。结果表明，使用该联合评估方法能够有效地识别载人潜水器结构中损伤部位与无损部位的差异，能够将该损伤评估方法应用于深海运载装备中。Abstract: Aiming at the technical difficulties of rapid damage identification for a large-scale manned submersible with complex structural system under deck loading, this paper introduces the vibration testing method into the recognition of structural damage of manned submersibles. A fast evaluation method for the structural damage of the manned submersible is proposed and a wavelet-based approach is employed in this paper. Discrete dyadic wavelet transform is used to separate the modal information superimposed in the vibration response signal, and then the energy value is obtained through wavelet packet transform. The damage index of joint damage assessment method is defined by combining them. The experimental analysis results prove that the joint assessment method can effectively identify the difference between the damage site and the non-destructive site in the manned submersible structure. The damage assessment method can be applied to deep-sea transport equipment.
-
Keywords:
- manned submersible /
- damage identification /
- vibration test /
- wavelet transform
-
-
[1] 刘保华, 丁忠军, 史先鹏, 等. 载人潜水器在深海科学考察中的应用研究进展[J]. 海洋学报(中文版), 2015, 37(10):1-10. [2] 秦升杰, 张奕, 丁忠军, 等. 蛟龙号载人潜水器结构缺陷统计与分析[J]. 船海工程, 2019, 48(1):134-136, 141. [3] ZHU H P, JING Y U, ZHANG J B. A summary review and advantages of vibration-based damage identification methods in structural health monitoring[J]. Engineering Mechanics, 2011, 28(2):1-6.
[4] ALVANDI A, CREMONA C. Assessment of vibration-based damage identification techniques[J]. Journal of Sound and Vibration, 2006, 292(1/2):179-202.
[5] 孙增寿, 韩建刚, 任伟新. 基于曲率模态和小波变换的结构损伤识别方法[J]. 振动.测试与诊断, 2005, 25(4):263-267. [6] 郭健. 基于小波分析的结构损伤识别方法研究[D]. 杭州:浙江大学, 2004. [7] 余竹, 夏禾, GOICOLEA J M, 等. 基于小波包能量曲率差法的桥梁损伤识别试验研究[J]. 振动与冲击, 2013, 32(5):20-25. [8] BAYISSA W L, HARITOS N, THELANDERSSON S. Vibration-based structural damage identification using wavelet transform[J]. Mechanical Systems and Signal Processing, 2008, 22(5):1194-1215.
[9] REN W X, SUN Z S. Structural damage identification by using wavelet entropy[J]. Engineering Structures, 2008, 30(10):2840-2849.
[10] 陈亮. 基于小波能量熵的结构损伤识别[D]. 广州:暨南大学, 2016.
计量
- 文章访问数: 3
- HTML全文浏览量: 0
- PDF下载量: 2
下载:
