基于声发射技术的大容积玻璃纤维缠绕气瓶冲击损伤评定

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摘要通过对大容积玻璃纤维缠绕气瓶分步升压爆破试验，采用声发射技术，监测分步升压爆破过程中缠绕层损伤演化以及不同升压阶段声发射信号响应特征，得到不同阶段声发射信号幅度、计数、累计计数以及能量等特征，试验压力由40MPa升至50 MPa阶段，缠绕层发生损伤，声发射信号活性增加约90倍，且纤维断裂信号强度较高，达到1.0×108 aJ。在此基础上，通过对带有不同程度冲击损伤气瓶升压爆破试验，对比分析0～30 MPa阶段不同损伤气瓶声发射响应区别。试验结果表明，缠绕层声发射信号随缠绕损伤程度增加，响应幅度增高，信号活性增强，强度增大，临界损伤气瓶缠绕层信号活性增强约20倍，信号强度可达到2.0×106 aJ，增大约10倍。因此，可在水压试验过程中，通过冲击损伤区域声发射信号幅度、计数等特征和临界损伤缠绕层信号特征对比，对冲击损伤进行安全评定。

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	骆辉
	李桐
	黄强华
	薄柯
	柴森
	李翔

关键词 ：声发射技术, 大容积缠绕气瓶, 玻璃纤维, 冲击损伤, 安全评定

Abstract：Through the step-up hydrostatic burst test of large-volume glass fiber wrapped composite cylinders, the acoustic emission technology was used to monitor the wrapped layer damage evolution behaviors during the step-up burst process and the acoustic emission signal response characteristics at different stages of boosting. The amplitude, count, cumulative count, and energy of acoustic emission signals in different stages were obtained. When the test pressure increased from 40 MPa to 50 MPa, the wrapped layer was damaged, the acoustic emission signal activity increases by about 90 times, and the fiber breaking signal strength was high, reached 1.0×108 aJ. On this basis, through the hydrostatic burst test of cylinders with different degrees of impact damage, the difference in acoustic emission response of cylinders with different damages in the 0-30 MPa stage was compared and analyzed. The test results show that the acoustic emission signal of the wrapped layer increased with the increase of the wrapped layer damage degree, and the signal activity and intensity increased. The signal activity of the wrapped layer of the critically damaged cylinder increased by 20 times, and the signal intensity reached 2.0×105 aJ. Therefore, during the hydrostatic test, the safely of impact damage of composite cylinder could be evaluated by compared the characteristics of the acoustic emission signal amplitude and count of the impact damage area and critical damage wrapped layer.

Key words： acoustic emission technology large volume wrapped gas cylinder glass fiber impact damage safety evaluation.

收稿日期: 2021-11-03 出版日期: 2023-03-15

引用本文:

骆辉，李桐，黄强华，薄柯，柴森，李翔. 基于声发射技术的大容积玻璃纤维缠绕气瓶冲击损伤评定[J]. 振动与冲击, 2023, 42(5): 143-149.
LUO Hui, LI Tong, HUANG Qianghua, BO Ke, CHAI Sen, LI Xiang. Impact damage evaluation of large volume glass fiber wrapped gas cylinder based on AE technology. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(5): 143-149.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2023/V42/I5/143

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