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- Keywords: concrete, crack, defect, elastic waves, imaging. 关键词：混凝土、裂缝、缺陷、弹性波、影像法。
- The absorption of elastic waves in rocks has been the subject of extensive theoretical and experimental study. 弹性波在岩层内的吸收问题曾经是理论上与实验上广泛研究的课题。
- We shall see that(7. 5. 25)is none other than the celebrated Snell's law applied to elastic waves. 我们很快就将看到;(7.;5
- These impulses or elastic waves are generally induced by blasting charges of dynamite in shot-holes drilled into the ground or by weight dropping . 首先是挖一个爆破井，将炸药放人井中，引爆炸药后便会产生所需的弹性波或脉冲。也可以利用一重物自由落体所产生的冲击得到弹性波。
- There are two kinds of elastic waves in solids a compressional wave and a transverse wave. 在固体中有两类弹性波，一类是压缩波，另一类是横波。
- R. M. White and F. W. Voltmer, “Direct piezoelectric coupling to surface elastic waves,” Appl. Phys. Lett. 7, 314-316 (1965). 陈永裕，层状表面声波元件之理论、实验及其应用，国立台湾大学应用力学研究所博士论文，中华民国九十一年一月。
- Power amplifier module amplifiers the sweep signal, driving the vibroseis push-and-pull the ground and forming elastic waves. 该电路采用准互补对称推挽电路，构成甲乙类放大，引入了多级反馈保证整个信号通道能非常稳定可靠地工作，并充分考虑了散热问题和保护电路的设计。
- LU Jian-fei,WANG Jian-hua.The scattering of elastic waves by holes of arbitrary shapes in saturated soil[J].Acta Mechanica Sinica,2002,34(6):904-913. [8]陆建飞;王建华.;饱和土中的任意形状孔洞对弹性波的散射[J]
- Reflection and transmission of elastic waves at a frictional contact interface between two piezoelectric media is discussed. 讨论了弹性波在压电介质摩擦接触界面上的反射和透射问题。
- The formalism to calculate the reflection and transmission coefficients for elastic waves through finite slabs is presented. 通过计算单层的散射矩阵我们最终获得多层体系的反射和透射系数。
- In this paper, using FEM method to numerical simulate the elastic wave equation. 本文采用有限元法进行弹性波方程数值模拟。
- In this study, we applied the reversibility of elastic wave to a discussion of the reverse time propagation of wave equation. 摘要本文应用波动方程式的可逆性讨论弹性波的逆时影像重建。
- The finite element method was used to calculate elastic wave propagation in the medium. 本文采用有限元素法计算弹性波在介质中的传播。
- In this paper, a combining exploration of theboth waves is analysed numerically by using finite-clement technique in solution of equations for elastic waves. 本文利用弹性波动方程有限元数值解技术,从数值模拟的角度研究了纵波(P)、转换波(SV)的联合勘探问题。
- The computerized tomography(CT) of elastic wave is a forward problem in the geophysical domain for more than ten years. 弹性波计算机层析成像（CT）技术是十多年来地球物理领域里的一个前沿热门课题。
- Hardin B O, Richare F E. Elastic wave velocities in granular soils[J]. Divi. Proc. of ASCE, 1963,89[SM1]:3-65. 李新.;用超声波法测定三轴仪内非饱和砂土试件动剪切模量初探[A]
- Till now, the testing method for the elastic wave velocity of rock specimens with ultrasonic waves is basically the travel time testing method. 迄今为止,岩石样品弹性波速的超声波测试基本上是采用波动走时的测定方法。
- Based on the theory of elastic dynamics, the scattering of elastic waves and the dynamic stress concentration in a fiber-reinforced composite are studied. 基于弹性动力学理论,对纤维增强复合材料结构中弹性波散射及动应力集中问题进行了分析研究。
- By using the propagating theory of elastic wave the attenuation mechanisms of the elastomer with cylindrical bores is analyzed. 摘要应用弹性波在带圆柱通道橡胶体内传播的理论，分析了穿孔橡胶体的吸声机理。
- The thin-layer method(TLM) is a semi-analytical and semi-numerical approach for the analysis of elastic wave propagation in stratified media. 薄层法是分析和模拟弹性波在层状介质中传播的一种半解析半数值方法。
