复合材料板在变温场下的超声导波传播特性及损伤成像方法

王长林; 任利; 钟永腾

复合材料板在变温场下的超声导波传播特性及损伤成像方法

王长林^1,,
任利²,
钟永腾^2, ,

1.
江苏开放大学信息工程学院, 江苏南京 210003
2.
温州大学机电工程学院, 浙江温州 325035

基金项目:

国家自然科学基金青年科学基金项目 51505339

浙江省自然科学基金青年基金项目 LQ16E050005

详细信息

作者简介:
王长林（1983-），男，江苏盐城人，硕士，讲师，主要从事目标检测方面的研究工作。E-mail：wangcl@jsou.edu.cn

通讯作者:
钟永腾（1984-），男，福建龙岩人，博士，副教授，主要从事结构健康监测技术方面的研究工作。E-mail：zhongyongteng@wzu.edu.cn

中图分类号: V219
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出版历程
- 收稿日期: 2022-01-20
- 修回日期: 2022-07-11
- 刊出日期: 2022-12-19

Study on Ultrasonic Guided Wave Propagation Characteristics and Damage Imaging for Composite Structures Under Variable Temperature Field

1.
School of Information Technology, Jiangsu Open University, Nanjing 210036, China
2.
College of Mechanical and Electrical Engineering, Wenzhou University, Wenzhou 325035, China

摘要

摘要: 基于Lamb波的损伤监测方法已在复合材料结构健康监测中得到了广泛的应用。然而，复合材料结构的服役环境复杂多变，超声导波信号极易被外界因素干扰。本文研究了玻璃纤维层合板在变温场下的超声导波特性及损伤成像修正方法。首先，利用红外热成像仪研究持续加热下超声导波信号幅值和相位的变化规律，并构建因变温引起的幅相误差矩阵。其次，将误差矩阵代入多重信号分类（2D-MUSIC）算法中修正导向矢量，并建立代价函数迭代出准确损伤位置。玻璃纤维复合材料层合板的模拟损伤实验表明该方法有效提高了2D-MUSIC算法在变温场下的损伤定位分辨率和精度。
- 变温场 /
- 超声导波 /
- 2D-MUSIC算法 /
- 损伤成像
Abstract: The Lamb-wave-based damage location method has been widely used for health monitoring of composite structures. However, it is easily interfered by external factors because its service environment is complex and changeable. To determine the influence of the temperature field on the propagation of Lamb waves in composite structures, in this study we first investigated the propagation characteristics of ultrasonic guided waves on glass fiber laminates under a temperature field using an infrared thermal imager. Subsequently, a corrected model was established using the extracted amplitude attenuation and phase delay errors. Consequently, a modified multiple signal classification(2D-MUSIC) algorithm-based damage imaging method is proposed for composite structures. The experimental results on glass fiber composite laminates show that the proposed method can effectively improve the resolution and accuracy of the original algorithm under a variable temperature field.
- variable temperature field /
- ultrasonic guided wave /
- 2D-MUSIC algorithm /
- damage imaging

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图 1 变温下阵列信号传播模型示意图

Figure 1. Array signal model under temperature fields

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图 2 变温环境下补偿2D-MUSIC算法流程

Figure 2. 2D-MUSIC based localization procedure

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图 3 变温场下玻璃纤维环氧树脂板的实验测试系统

Figure 3. Experimental setup of inconsistent temperature field

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图 4 传感器PZT S₀超声导波响应信号在局部加热300 s前后的幅值相位变化

Figure 4. The direct wave of PZT S₀ gain-phase contrast after heating 300 s

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图 5 局部持续加热状态下传感器PZT S₀超声导波信号幅值衰减与相位延迟曲线

Figure 5. Gain-phase errors contrast of PZT S₀ under variable temperature field

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图 6 局部温度70.77℃时的响应时域信号

Figure 6. Array signal at local temperature 70.77℃

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图 7 变温场下算法修正前后的定位效果比较

Figure 7. Impact location comparison under variable temperature

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表 1 不同变温度环境下损伤定位结果及误差统计

Table 1 Damage localization results and errors under variable temperature

No.	Temperature/℃	${\hat r_1}$/cm	${\hat \theta _1}$/°	E₁^r	E₁^θ
1	21.87	25.7	93	0.7	3
2	29.54	24.3	93	0.7	1
3	39.80	24.4	93	0.6	3
4	49.86	25.9	93	0.9	3
5	60.65	24.6	91	0.4	1
6	70.77	23.8	93	1.2	3
7	78.67	25.7	93	0.7	3

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参考文献(11)

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