应力波

冲击样本的应力波信号经Hilbert变换变为连续的瞬态时序信号后，提取时间和峰值等特征信息训练BP神经网络。

The signals of the impact stress wave in time domain were transformed into momentary sequential time signals using Hilbert transform .

根据分离式Hopkinson压杆试验的一维应力波加载理论，运用Visualc++6.0软件开发工具，编制了该类试验的后续数据处理系统。

A data processing system to be used in Split Hopkinson Bar test has been compiled by visual c + + 6.0 according to the theory of one dimension stress wave .

应力波在固体中的传播，根据其条件可视为声场或超声场的一部分。

The propagation of stress waves in solids can be considered as a part of the field of acoustics or ultrasonics depending on the conditions .

B4C/Al复合板中应力波行为分析（Ⅱ）

Analysis on Stress Waves Propagation in B_4C / Al Composite (ⅱ)

根据一维应力波理论求得作用于试件上的载荷P（t）和试件加载点的位移δ（t）。

The curves of the load P ( t ) loaded on the specimens and the displacement δ( t ) of the specimens were acquired according to the one-dimensional stress wave theory .

当前炮次爆破形成的爆炸应力波在已开挖围岩中的传播可以概化为Lamb线源问题。

The propagation of the explosive stress waves in surrounding rock masses may be simplified as Lamb problem .

本文采用自动数据采集及FFT技术研究应力波的弥散与衰减特性。

Dispersion and attenuation characteristics of stress waves were studied by means of the automatic data collection and FFT technique .

众所周知，声发射（AE）是材料在受到形变或外力作用时，迅速释放能量而产生的瞬态应力波，是进行结构诊断的重要依据。

Acoustic emission ( AE ) is stress wave produced when the materials are distorted , or under the outside load .

首先，用快速傅立叶变换（FFT）对滚动轴承故障应力波信号进行了分析，但是无法提取故障特征频率。

Firstly , the fault stress wave signals of rolling bearing were analyzed using FFT , but it was failed to extract the feature frequency of the fault signals .

根据应力波传播速度，用Hooke介质模型推算岩石的弹性模量，所得数值远大于静态模量。

The elastic moduli calculated according to wave velocities in Hooke media are greatly larger than those in static state .

为测试层板复合材料的断裂韧性，对传统的Hopkinson压杆测试系统进行了改进，建立了应力波载荷作用下材料动态断裂韧性的测试方法。

In order to obtain dynamic fracture toughness of laminates , the Hopkinson Pressure Bar technique was improved on basis of traditional testing system .

也许最简单地说明在动态裂纹扩展和止裂中应力波的规律是由双扭（DT）试件的一维分析给出的。

Perhaps the simplest illustration of the role of stress waves in dynamic crack propagation and crack arrest is given by the one-dimensional analysis of the double torsion specimen .

结构损伤检测应力波叠前偏移成像技术中OPCM换能器的研究

Research on OPCM Transducer of Stress Wave Pre-stack Migration Imaging Technology in Structural Damage Detection

这种几何形状的改变使得做为Hopkinson杆试验应用基础的一维应力波理论是否仍然成立成为疑问。

It is doubtful whether one-dimensional stress wave theory as the application foundation of Hopkinson bar tests can be used because of the shape change of loading bar .

实验结果表明，随着Es／Eb比值的增大，原生爆炸应力波的峰值随之增大，而次生爆炸应力波的峰值则相应减小。

The test results showed that , with the increase of the ratio of Es to Eb , the peak values of the primary explosive stress wave increased while that of the secondary wave decreased .

并以一维应力波为例，讨论了FCT方法在有限差分与有限元中的应用。

With the numerical simulations of one dimensional stress waves , its applications to Finite Difference Method ( FDM ) and Finite Element Method ( FEM ) are also discussed .

应用LS-DYNA程序的强大计算功能对单自由面条件下延长药包的爆破过程进行了数值模拟，分析了不同炮孔半径、装药长度的条件下爆炸应力波的产生、传播及岩石的破碎过程。

Numerical simulation of basting process of extended charge in single free face relys to mighty counting function of Ls-dyna program , and analyzes engendering and spreading of blasting stress wave and crashing process of rock in different radius of blast hole and different charge length .

研究了拉伸Hopkinson试验（TSHB）的优化问题：Hopkinson拉伸试验装置的结构及加载条件明显影响试验结果，其中包括试件的几何形状、试件与杆的连接以及接触边界、应力波的影响。

The optimization of tension Hopkinson bar ( TSHB ) tests has been studied . The structure and loading conditions of TSHB have evident influence on test results including the gauge length and geometry of specimen , interconnecting linkage , contact boundary , stress waves and so on .

应力波与可滑移岩石界面间的相互作用研究

A Study on Interaction between Stress Wave and Slipping Rock Interface

应力波与带软衬垫的地下结构动力相互作用

Dynamic interation between stress waves and underground structure with crushable backpacking

应力波作用下颗粒介质的动力特性研究

Studies on the dynamic properties for granular medium under stress wave

基桩应力波反射法检测中某些误判现象的分析与探讨

Probe into the False Analysis of Pile Reflected Wave Testing Method

基于最优基小波的基桩弱损伤应力波检测

Detection of small damages in foundation piles using optimal base wavelet

花岗岩中化爆的自由场应力波传播规律分析

Free-field stress wave propagation induced by underground chemical explosion in granite

应力波反射法动测桩浅部缺陷分析

Analysis of shallow defects of piles by method of reflection wave

应力波在功能梯度土介质中传播的特性研究

Study on characters of stress wave propagation in functionally graded soil

花岗岩体中应力波传播计算的动态本构关系

A dynamic constitutive relation for calculating stress waves propagating in granite

从而得到应力波的传播速率。

So the travelling speed of stress wave can be obtained .

应力波在变截面杆中传播的数值分析

Numerical analyses of stress wave propagation in a variable section bar

振动切削微观应力波机理分析与有限元仿真

Vibration Cutting Mechanism of Micro-Stress Wave Analysis and Finite Element Simulation