查询词典 elastic wave

The elastic wave test is an effective method for the nondestructive evaluation of concrete structures.

弹性波法是用来评估混凝土品质的一种相当有效的非破坏检测法。

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。

Transmission characteristics of elastic wave versus mode quantum number and cylinder radius are calculated by the transfer matrix method.

并利用转移矩阵研究了弹性波的传输特性随模式量子数和圆柱半径的变化规律。

Test results indicate that the propagationvelocity of the elastic wave,shear modulus and coefficient of subgrade ...

实验结果表明：匀质土中弹性波的传播速度、剪切模量、地基抗压刚度系数均随土层深度增加而增大；不同性质的土层，其变化规律亦异。

It is a new tool to detect and observe the structure and status of underground media by accurately measuring its transfer function through sinusoidal elastic wave accurately controlled in frequency and stable in phase.

它是使用一种精密控制频率和相位稳定的弹性波，对发射和接收两点间的传递函数进行精密测定从而监视和观测地下构造和状态的一种新型手段。

Acoustic Emission is a class of universal phenomena whereby transient elastic wave are generated by the rapid release of energy from localized sources within a material. In various field, people begin to use this phenomena to test these structures damage and evaluate their security.

声发射是材料中局部源快速释放能量而产生瞬态弹性波的一种普遍物理现象，人们已经开始在各个领域中利用这种现象进行研究对象的缺陷检测和安全性评价。

Based on the two phase anisotropic model this paper analyses and presents the dynamic equations of elastic wave propagation, the Galerkin variational equation, and the finite element equation in two phase anisotropic media.

基于双相各向异性介质模型，首先推导了双相各向异性介质中弹性波传播的动力学方程及其Galerkin变分方程和有限元运动方程，然后给出了孔隙弹性波方程的有限元数值解法以及二维双相PTL介质中波场模拟的人为吸收边界条件。

The success or failure of elastic wave equation inversion are relevant to the selection of forward modeling methods.

正演模拟方法的选取与弹性波方程反演的成败直接相关。

The theory of elastic wave propagation in damaged media was studied.

对弹性波在损伤介质中的传播理论进行研究。

Through the above discussment, we can conclude that in the thickness of top coal detection,elastic wave method is effective. If the focal satisfy the requirment of the frequency bnak and we take some measures on the emit and receive equipment and use advanced signal analysis method -wavelet analysis ,we can obtain ideal result .

以上工作表明，应用弹性波方法对顶煤厚度探测是切实可行的，只要震源满足频带要求，发射和接收装置采取相应的措施，再结合先进的信号处理方法—小波分析，煤厚探测是可以取得比较理想的效果的。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。