高速撞击声发射信号在铝板中的衰减规律
Attenuation of Acoustic Emission Signals from Hypervelocity Impact on Al Paltes
摘 要
高速撞击声发射信号传播至传感器并被转换成电信号的过程中会发生信号幅值的衰减，导致信号在损伤评估和源定位的误差增大。分析了衰减产生的原因，得到了衰减的一般规律。为了分析高速撞击声发射信号中不同频率板波模态的衰减规律，将高速撞击数值模拟声发射信号进行了小波信号高频和低频的重构并分别进行衰减规律的研究，得到了此两种频率在铝板中的衰减规律，研究了衰减系数和“等效幅值”随撞击速度的变化规律，研究结果可以用于撞击源定位传感器布局优化及损伤程度评估等领域。
高速撞击
信号衰减
声发射
Space debris
Hypervelocity impact
Signal attenuation
Acoustic emission
Abstract
Attenuation of acoustic emission signal occurs during its transmission to sensors on the aluminum plate. This would bring errors in damage evaluation and source location. In this paper, cause and rules of attenuation are analyzed and attained. In order to analyze the attenuation rules of waves in different frequency, the simulated acoustic emission signals from hypervelocity impact are reconstructed in higher and lower frequency, and their attenuation rules are analyzed separately. Their attenuation rules transmitting on aluminum plate are attained. In addition, rules of attenuation ratio and equivalent amplitude changing with impact velocity are analyzed as well. The results could have some applications in optimization of sensor array and damage evaluation.
中图分类号 TG115.28
所属栏目 科研成果与学术交流
基金项目 空间碎片专项基金资助项目(K0203210)
收稿日期 2012/9/13
修改稿日期
网络出版日期
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备注刘武刚(1975-)，男，高级工程师，主要从事航天器结构强度试验与损伤评估、声发射技术应用研究。
引用该论文: LIU Wu-Gang,WANG Jian-Min,GU Hai-Bei,YU Rong-Gang,PANG Bao-Jun. Attenuation of Acoustic Emission Signals from Hypervelocity Impact on Al Paltes[J]. Nondestructive Testing, 2012, 34(12): 41～45
刘武刚,王建民,顾海贝,于荣刚,庞宝君. 高速撞击声发射信号在铝板中的衰减规律[J]. 无损检测, 2012, 34(12): 41～45
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参考文献
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【11】Liu Wu-Gang, Pang Bao-Jun, Sun Fei, et al. Acoustic emission detection and location for hypervelocity impact［C］// The Proceeding of 4th European Conference on Space Debris. Darmstadt: ［s.n］,2005.
【12】刘武刚，庞宝君，韩增尧，等.天基在轨空间碎片撞击监测技术的进展［J］.强度与环境,2008,35(1):57-64.
【13】刘武刚，庞宝君，韩增尧，等.天基在轨空间碎片撞击感知系统研究现状及关键技术［J］.导弹与航天运载技术,2008(3):1-5.
【14】唐颀，庞宝君，韩增尧，等.单层板撞击成坑声发射辨识及参数估计研究［J］.中国空间科学技术,2008(5):59-68.
【15】杨明纬.声发射检测［M］.北京：机械工业出版社,2004.
【2】刘武刚，庞宝君，韩增尧，等.基于声发射的单层铝板高速撞击损伤类型识别［J］.宇航学报,2011,32(3):671-675.
【3】Prosser W H, Gorman M R. Acoustic emission signals in thin plates produced by impact damage［J］. Journal of Acoustic Emission,1999,17(1/2):29-36.
【4】Iuzzolino A J, McKibben R B, Simpson A, et al. In-situ detection of a satellite breakup by the SPADUS instrument［C］// Proceedings of Third European Conference on Space Debris. Darmstadt German: ESA,2001.
【5】Iuzzolino A J, Economou T E, McKibben R B, et al. Final results from the space dust(SPADUS) instrument flown aboard the earth-orbiting ARGOS spacecraft［J］. Planetary and Space Science,2005(53):903-923.
【6】Bjorkman M D, Geiger J D, Wilhelm E E. Space station integrated wall design and penetration damage control(Task 3-Theoretical Analysis of Penetration Mechanics)［R］. N.G.C.M.S.F. Center, A. Marshall Space Flight Center, and S.t.a.D.L.S.L. Avan, Editors. National Aeronautics and Space Administration,1987.
【7】Gaul L, Hurlebaus S. Identification of the impact location on a plate using wavelets［J］. Mechanical Systems and Signal Processing,1997,12(6):783-795.
【8】Graziani F, Ferrante M, Palmerini G B, et al. UNISAT Program: A university tool for space education. in 39th Aerospace Sciences Meeting & Exhibit［C］// The American Institute of Aeronautics and Astronautics. Reno, Nevada: ［s.n］,2001.
【9】Kim H M, Bartkowicz T J. An experimental study for damage detection using a hexagonal truss［J］. Computers and Structures,2001(79):173-182.
【10】Porfilio M, Graziani F. A space debris impact detector for the UNISAT microsatellite［C］// 50th International Astronautical Congress. Amsterdam:［s.n］,1999.
【11】Liu Wu-Gang, Pang Bao-Jun, Sun Fei, et al. Acoustic emission detection and location for hypervelocity impact［C］// The Proceeding of 4th European Conference on Space Debris. Darmstadt: ［s.n］,2005.
【12】刘武刚，庞宝君，韩增尧，等.天基在轨空间碎片撞击监测技术的进展［J］.强度与环境,2008,35(1):57-64.
【13】刘武刚，庞宝君，韩增尧，等.天基在轨空间碎片撞击感知系统研究现状及关键技术［J］.导弹与航天运载技术,2008(3):1-5.
【14】唐颀，庞宝君，韩增尧，等.单层板撞击成坑声发射辨识及参数估计研究［J］.中国空间科学技术,2008(5):59-68.
【15】杨明纬.声发射检测［M］.北京：机械工业出版社,2004.
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