DETERMINATION OF THE SURFACE WAVE DISPERSION OF A COATING EXCITED BY LASER
A detailed study is undertaken to analyze the dispersion characteristics of a coating under laser excitation. The surface wave dispersion is one of its inherent properties. Two-dimensional Fourier transform is applied to convert the experiment data in the time-space domain into the frequency-wavenumber domain, where the peaks form the dispersive curves. A coherent method is proposed to precisely measure the dispersive curves of coatings. The use of the phase information and magnitude spectrum makes the measurements more precise and stable than traditional non-coherent methods. Additionally, storage depth of oscilloscope affects the precision of dispersion curves. The technique of obtaining the dispersive curves with high precision is an efficient tool to solve the inversion problem.
Coating Phase spectrum Surface wave Dispersion Laser
Xue-hang SONG Yong-dong PAN Zheng ZHONG
School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092, China
国际会议
深圳
英文
494-497
2011-12-09（万方平台首次上网日期，不代表论文的发表时间）