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发布时间：2025-04-29
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| 影响因子： | 3.7 |
| DOI码： | 10.1088/1361-665X/acf2d2 |
| 所属单位： | 长江大学电子信息与电气工程学院 |
| 教研室： | 电子系 |
| 发表刊物： | Smart Materials and Structures |
| 关键字： | bolt tightness monitoring, Lamb wave, piezoelectric ultrasonic transducer, transfer-function based signal reconstruction, feature-level data fusion |
| 摘要： | Narrowband tone burst excitation with a carefully selected frequency is generally utilized to generate Lamb waves for mode purity, dispersion diminution and signal interpretability. Narrowband excitation exhibits saturation phenomenon and even non-monotonic trends with the development of bolt looseness. In this research, a piezoelectric ultrasonic transducer with high signal-to-noise ratio is designed and fabricated for bolt tightness monitoring. The chirp signal is utilized to drive the actuator to generate broadband Lamb waves in the connected plate, and a transfer function-based signal reconstruction algorithm is innovatively proposed to extract narrowband tone burst responses with different center frequencies from the broadband chirp response for bolt tightness monitoring. The leaked wave energy-based bolt tightness indexes (TIs) are calculated based on the extracted multiple tone burst responses and a feature-level data fusion strategy is proposed to combine the TIs for exploiting the merits of different-frequency inspecting waves for different bolt tightness conditions. The fused TI not only presents a monotonic tendency with the increasing of bolt tightness, but also tackles the low sensitivity of narrowband Lamb waves for embryo bolt looseness. The proposed method contributes a novel and stable scheme for bolt tightness monitoring and opens a new perspective for damage evaluation of structures. |
| 第一作者： | 李修权 |
| 论文类型： | 期刊论文 |
| 卷号： | 32 |
| 期号： | 105017 |
| 发表时间： | 2023-09-01 |
| 收录刊物： | SCI |
