光子学报, 2009, 38 (5): 1041, 网络出版: 2010-05-10
横观各向同性材料中激光超声谱有限元数值模拟
Numerical Simulation of Laser-generated Ultrasound by Spectral Finite Element Method in Transverse Isotropic Material
激光技术 超声学 谱有限元方法 横观各向同性材料 Laser technique Ultrasonics Spectral finite element method Transverse isotropic material
摘要
研究了横观各向同性材料中激光超声波的传播特征.基于谱有限元方法,建立了横观各向同性材料中激光超声的数值模型.利用谱有限元方法模拟脉冲激光作用于材料上产生超声波及其传播的过程.讨论了横观各向同性薄板的各向异性及各向同性平面内超声波的传播特征,并分析了材料厚度的变化对产生超声波模态的影响.
Abstract
The propagation characteristics of laser-generated ultrasound in the transverse isotropic material were studied theoretically.Based on the spectral finite element method,a numerical model of laser-generated ultrasound of the transverse isotropic material was established.The spectral finite element method was developed to simulate the laser generation and propagation of ultrasound in the system.The propagation characteristics of ultrasound in the anisotropic and isotropic planes of the transverse isotropic material were studied.And,the effect of the different material thickness to ultrasound mode was analyzed.
孙宏祥, 许伯强, 徐晨光, 徐桂东, 王峰. 横观各向同性材料中激光超声谱有限元数值模拟[J]. 光子学报, 2009, 38(5): 1041. SUN Hong-xiang, XU Bai-qiang, XU Chen-guang, XU Gui-dong, WANG Feng. Numerical Simulation of Laser-generated Ultrasound by Spectral Finite Element Method in Transverse Isotropic Material[J]. ACTA PHOTONICA SINICA, 2009, 38(5): 1041.