为了监测整体成型复合材料结构的损伤,提出了一种基于Lamb波和Hilbert变换的能量损伤指数.首先,通过应用Hilbert变换提取Lamb波信号的波形包络;然后选取具有最大峰值的波包,将此波包在结构出现损伤后的能量变化值与损伤前的能量之比作为损伤指示;该方法不需要选择特定的Lamb波模式,克服了Lamb波在复合材料结构中存在的频散、多模式及模式转换给信号分析带来的困难;最后在复合材料T型加筋的损伤演化试验中,对该能量损伤指数进行了应用验证研究.研究结果表明:该能量损伤指数可以用于复合材料T型加筋的损伤监测,当能量损伤指数(EDI)值达到0.62时,所研究的复合材料T型加筋确定有损伤产生.
参考文献
[1] | 陈业标,汪海,陈秀华.飞机复合材料结构强度分析[M].上海:上海交通大学出版社,2011:1-3.Chen Yebiao,Wang Hai,Chen Xiuhua.Strength analysis of composite aircraft structures[M].Shanghai:Shanghai Jiao Tong University Press,2011:13.,2011. |
[2] | 杨乃宾,章怡宁.复合材料飞机结构设计[M].北京:航空工业出版社,2002:1-19.Yang Naibin,Zhang Yining.Design of composite aircraft cture[M].Beijing:Aviation Industry Press,2002:1-19.,2002. |
[3] | 袁慎芳.结构健康监测[M].北京:国防工业出版社,2007:1-23.Yuan Shenfang.Structural health monitoring and damage control[M].Beijing:National Defense Industry Press,2007:1-23.,2007. |
[4] | Boller C.Next generation structural health monitoring and its integration into aircraft design[J].International Journal of Systems Science,2000,31(11):1333-1349.,2000. |
[5] | 王强,袁慎芳,田峰,江兵.采用聚焦Lamb波方法的板结构螺钉松动监测[J].压电与声光,2012(01):73-75,80. |
[6] | 王瑜,袁慎芳,邱雷,胥保春.主动Lamb波中的空间滤波器结构健康监测[J].振动、测试与诊断,2011(06):794-797. |
[7] | Pohl J,Willberg C,Gabbert U,et al.Experimental and the oretical analysis of Lamb wave generation by piezoceramic ac tuators for structural health monitoring[J].Experimental Mechanics,2012,52(4):429-438.,2012. |
[8] | Ambrozinski L,Stepinski T,Packo P,et al.Self focusing Lamb waves based on the decomposition of the time reversal operator using time frequency representation[J].Mechanical Systems and Signal Processing,2012,27(1):337-349.,2012. |
[9] | Chakrapani S K,Padiyar M J,Balasubramaniam K.Crack detection in full size Cz silicon wafers using Lamb wave air coupled ultrasonic testing (LAC UT)[J].Journal of Non destructive Evaluation,2012,31(1):46-55.,2012. |
[10] | Ihn J B,Chang F K.Pitch catch active sensing methods in structural health monitoring for aircraft structures[J].Structural Health Monitoring,2008,7(1):5-19.,2008. |
[11] | Ihn J B,Chang F K.Detection and monitoring of hidden fa tigue crack growth using a built in piezoelectric sensor/actua tor netork:I.Diagnostics[J].Smart Materials and Struc tures,2004,13(3):609-620.,2004. |
[12] | Wang L,Yuan F G.Damage identification in a composite plate using prestack reverse time migration technique[J].Structural Health Monitoring,2005,4(3):195-211.,2005. |
[13] | 王强,袁慎芳.复合材料板脱层损伤的时间反转成像监测[J].复合材料学报,2009(03):99-104. |
[14] | 邱雷,袁慎芳,张逍越,等.基于Shannon复数小波的复 合材料结构时间反转聚焦多损伤成像方法[J].复合材料学 报,2010,27(2):101-107.Qiu Lei,Yuan Shenfang,Zhang Xiaoyue,et al.Shannon complex wavelet and time reversal focusing based muhi-dam age imaging method on composite structures[J].Acta Mate riae CompositaeSinica,2010,27(2):101-107.,2010. |
[15] | 王强,袁慎芳,陈小惠,田峰,江兵.主动Lamb波合成波阵面损伤成像监测方法[J].仪器仪表学报,2011(11):2468-2474. |
[16] | 胡广书.数字信号处理[M].北京:清华大学出版社,2003:156-162.Hu Guangshu.Digital signal processing[M].Beijing:Tsin ghua University Press,2003:156-162.,2003. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%