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Alternative TitleMeasurement of free surface velocity in laser shock peening with photonic Doppler velocimetry
宋宏伟; 吴先前; 王健; 黄晨光; 魏延鹏; 王曦
Source Publication中国科学. 物理学, 力学, 天文学
Other AbstractAs a newly developed instrument,photonic Doppler velocimetry(PDV) has become an ideal replacement in situations where VISAR diagnostics function poorly.However,there is a limitation on how well this technique works when the velocity of low magnitude is rapidly changing.In this paper,PDV is utilized to capture the free surface velocity history of laser shock peening(LSP),which is a typical signal rises in nanosecond-level short time and fluctuates significantly,and methods of short time Fourier transform and continuous wavelet transform were compared in processing the interference signal.The results show that PDV is an effective diagnostic method to study the characteristics of shock pressure induced in LSP,and the temporal particle velocity profile including the elastic precursor wave is tracked.Compared to the short time Fourier transform,the continuous wavelet transform demonstrates a better temporal resolution and better interpretation to the real physical behavior.
Keyword激光干涉 激光冲击强化 冲击波 质点速度 时频变换
Subject Area冲击动力学
Indexed ByCSCD
Funding Organization中国科学院装备研制项目(编号:YZ200930); 国家自然科学基金(批准号:10972228,91016025,11002150)资助项目
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Document Type期刊论文
Corresponding Author宋宏伟
Recommended Citation
GB/T 7714
宋宏伟,吴先前,王健,等. 光纤激光干涉测量激光冲击强化自由表面速度[J]. 中国科学. 物理学, 力学, 天文学,2012,42(8):861-868.
APA 宋宏伟,吴先前,王健,黄晨光,魏延鹏,&王曦.(2012).光纤激光干涉测量激光冲击强化自由表面速度.中国科学. 物理学, 力学, 天文学,42(8),861-868.
MLA 宋宏伟,et al."光纤激光干涉测量激光冲击强化自由表面速度".中国科学. 物理学, 力学, 天文学 42.8(2012):861-868.
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