采集铁基合金涂层在不同接触疲劳损伤阶段的声发射信号,并采用dB10基本小波对其进行5层小波分解和重构,分析了疲劳损伤声发射信号的波形和频率特征.结果表明:裂纹萌生阶段的原始声发射信号以连续型为主,裂纹的稳定扩展阶段以混合型为主,裂纹的失稳扩展阶段以突发型为主；通过小波变换实现了将疲劳损伤声发射信号与干扰波分离,获得了高信噪比的疲劳损伤特征信息；在不同的疲劳损伤阶段,声发射信号的频率分布各不相同.随着疲劳损伤的加剧,各层的波形幅值呈增大的趋势,并且疲劳损伤频率分布范围也更加的广泛.
参考文献
| [1] | 徐滨士;朱绍华.表面工程的理论与技术[M].北京:国防工业出版社,2010 |
| [2] | S. Zhu;B. Xu;J. Yao .High Quality Ceramic Coatings Sprayed by High Efficiency Hypersonic Plasma Spraying Gun[J].Materials Science Forum,2005(Pt.5):3981-3984. |
| [3] | Chee Keong Tan;David Mba .Identification of the acoustic emission source during a comparative study on diagnosis of a spur gearbox[J].Tribology International,2005(5):469-480. |
| [4] | 朴钟宇,徐滨士,王海斗,濮春欢.等离子喷涂铁基涂层的接触疲劳失效机理研究[J].材料工程,2009(11):69-73. |
| [5] | PIAO Z Y;XU B S;WANG H D et al.Investigation of fatigue prediction of Fe-Cr alloy coatings under rolling contact based on acoustic emission technique[J].Applied Surface Science,2011,257(07):2581-2586. |
| [6] | Miguel JM.;Guilemany JM.;Mellor BG.;Xu YM. .Acoustic emission study on WC-Co thermal sprayed coatings[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2003(1/2):55-63. |
| [7] | D. Mba;Raj B. K. N. Rao .Development of Acoustic Emission Technology for Condition Monitoring and Diagnosis of Rotating Machines: Bearings, Pumps, Gearboxes, Engines, and Rotating Structures[J].The Shock and Vibration Digest,2006(1):3-16. |
| [8] | 杨明纬.声发射检测[M].北京:机械工业出版社,2005 |
| [9] | N. Tandon;A. Choudhury .A review of vibration and acoustic measurement methods for the detection of defects in rolling element bearings[J].Tribology International,1999(8):469-480. |
| [10] | 周伟.Matlab小波分析高级技术[M].西安:西安电子科技大学出版社,2006 |
| [11] | 韩磊,程礼,苗学问.基于小波分析的航空发动机轴承故障诊断[J].轴承,2008(10):30-34. |
| [12] | Zhu Kunpeng;Wong Yoke San;Hong Geok Soon .Wavelet analysis of sensor signals for tool condition monitoring: A review and some new results[J].International Journal of Machine Tools & Manufacture,2009(7/8):537-553. |
| [13] | Z. K. Zhu;Ruqiang Yan;Liheng Luo;Z. H. Feng;F. R. Kong .Detection of signal transients based on wavelet and statistics for machine fault diagnosis[J].Mechanical Systems & Signal Processing,2009(4):1076-1097. |
| [14] | ZHANG X C;XU B S;WU Y X et al.Porosity,mechanical properties,residual stresses of supersonic plasma-sprayed Nibased alloy coatings prepared at different powder feed rate[J].Applied Surface Scicence,2008,254(13):3879-3889. |
| [15] | X.C. Zhang;B.S. Xu;F.Z. Xuan .Statistical analyses of porosity variations in plasma-sprayed Ni-based coatings[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2009(1/2):501-508. |
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%