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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2005, Vol. 6 Issue ( 8): 6-    DOI: 10.1631/jzus.2005.A0945
    
Inverse method for the determination of elastic properties of coating layers by the surface ultrasonic waves
CHANG Jun, YANG Zhen, XU Jin-quan
School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, China
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Abstract  As the coated materials are widely applied in engineering, estimation of the elastic properties of coating layers is of great practical importance. This paper presents an inversion algorithm for determining the elastic properties of coating layers from the given velocity dispersion of surface ultrasonic waves. Based on the dispersive equation of surface waves in layered half space, an objective function dependent on coating material parameters is introduced. The density and wave velocities, which make the object function minimum, are taken as the inversion results. Inverse analyses of two parameters (longitudinal and transverse velocities) and three parameters (the density, longitudinal and transverse velocities) of the coating layer were made.

Key words： Coating layers      Surface waves      Dispersive equation      Inverse algorithm     
Received: 01 March 2005     
CLC:  O347.4  
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CHANG Jun
YANG Zhen
XU Jin-quan
Cite this article:

CHANG Jun, YANG Zhen, XU Jin-quan. Inverse method for the determination of elastic properties of coating layers by the surface ultrasonic waves. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2005, 6( 8): 6-.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.2005.A0945     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2005/V6/I 8/6

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