Acoustic emission detection and location for hypervelocity impacts

被引：0

作者：

Liu, WG ^{[1
]}

Sun, F ^{[1
]}

Pang, BJ ^{[1
]}

Zhang, W ^{[1
]}

机构：

[1] Harbin Inst Technol, Hyperveloc Impact Res Ctr, Harbin 150080, Peoples R China

来源：

Proceedings of the 4th European Conference on Space Debris | 2005年 / 587卷

关键词：

D O I：

暂无

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

Acoustic emission (AE) analysis is used for characterization and to location for hypervelocity Impacts. Two different Acoustic Emission (AE) sensors were used to detect the arrival time and signals of the hits. Hypervelocity Impacts were generated with a two-stage light-gas gun firing small Aluminum ball projectiles (4mm, 6.4mm). In the impact studies, the signal was dominated by a large extensional mode with little flexural mode component detected by the conventional crossing threshold signal method with Wideband sensors. The results make clears that the location obtained by the resonant R15 sensors are superior to these obtained by wideband sensors. All impacts generated very large amplitude AE signals, which propagated as plate modes. The signals also consisted of much higher Frequency. The multi-source impact simultaneously was observed during the impacts in that it is difficult for the current conventional localized-algorithm to locate the sources.

引用

页码：661 / 664

页数：4