The propagating characters of strain wave and displacement wave in different piles are studied.
将基桩简化为一维弹性杆，研究了位移波和应力波在不同类型的基桩中的传播特性。
Then, the propagation of one-dimensional strain wave caused by the plate impact is investigated, and the attenuation of stress wave is evaluated.
然后研究了在平板撞击下的一维应变波的传播和衰减特性。
At the same time, the reflection characters of strain wave and displacement wave are analyzed at the fixed end, free end and elastic bearing end.
同时，本文分析了位移波和应力波在固定端、自由端和弹性支承端的反射特点。
Abgstract Through The analysis of measured low strain wave shape curve for pile foundation. The wave characteristics of shallow defeats in pile is shown.
通过对基桩低应变实测波形曲线的分析，说明桩身浅部存在缺陷的波形特征。
The pile is simplifyed as an one dimensional elastic rod. The propagating characters of strain wave and displacement wave in different piles are studied.
将基桩简化为一维弹性杆，研究了位移波和应力波在不同类型的基桩中的传播特性。
When strain waves pass through a ferromagnetic bar, owing to piezomagnetic effect, a nonuniform magnetic current will be stimulated by the strain wave simultaneously.
应变波通过铁磁性杆件时，由于压磁效应，可以激发出不均匀的磁流。
Nor is there any guarantee that, having switched production, a second wave of an H1N1 strain will indeed be deadly.
也不能保证，在生产已经转移的情况下，第二波甲型H1N 1流感的爆发一定会是致命性的。
At present, the reflecting wave method on low strain occupy the most marketplace in detecting the pile's integrality by advantage of its simple and convenient measuring way.
目前，低应变反射波法以其现场测试简便快捷的优势占据了桩基完整性检测的大部分市场。
Wave propagation properties for P-SV wave in a free-fixed infinite plate in the state of plane strain problem were investigated.
针对平面应变弹性波动问题，研究了自由-固定边界无限大弹性板中P -SV波的传播特性。
Based on wave equation, the formula of displacement and strain in different section are derived, and the frequency equation is given.
从波动方程出发推导了各分段的位移及应变的表达式，同时给出了频率方程。
According to the analysis of engineering example, the paper discussed the principle of reflected wave method and its application for detecting quality of low strain pile foundation.
通过工程实例分析，论述了反射波法低应变动载检测的原理和在桩基础工程现场检测中的应用。
A new reflection wave method is presented for inspecting the pile integrity of the non-linear elastic material under the condition of low strain.
对非线性弹性材料桩身完整性检测的低应变反射波新方法进行了研究。
The contrast tests were used to show the effect of wave dissipation and the strain of the mooring anchor chain of the floating breakwater under the wave and wave-current respectively.
对在波浪单独作用和波、流共同作用时，浮堤的消浪性能和锚链张力进行比较性试验，并对浮堤在波浪单独作用下的运动轨迹进行描述。
By use of dynamic strain testing, the ultrasonic wave, bedded composite rock damage and fracture mechanisms and the fragmentation process during blasting have been experimentally studied.
运用超动态应变测试技术、超声波检测仪对层状复合岩体的爆破损伤破坏机理和破坏过程进行了实验研究。
Low strain dynamic testing on actual pile was conducted to investigate if the wave velocity is varied in the installed pre-cast pile.
通过实际工程的低应变桩基动测，发现打入桩的波速随时间提高。
It is found that under little axial strain, armchair carbon nanotubes are still conductors, but Fermi wave vector, Fermi dot and the effective mass near Fermi face are changed.
在小的轴向拉伸下，扶手椅型碳纳米管仍然是良好的导体，但其费米波矢、费米点及费米面处的有效质量都发生了变化。
The analysis includes the height of sloshing wave, the stress and the strain of the tank wall, the uplifting of the base plate and the base moment and base shearing force.
包括储液晃动波高，罐壁的应力和应变，底板的提离以及基底弯矩和剪力。初步分析了浮放储液罐的“象足”变形产生原因及破坏机理。
Whatever the straight line part of the stress-strain curve may be, it is always possible to find out the rock stress threshold by the peak value of the S-wave velocity.
试验结果表明：不论应力应变曲线上的直线部分是否明显，都可以用检测横波速度最大值的办法确定岩石的应力门槛值；
Though it has been gradually accepted and actively promoted by the Engineering Field, the low-strain reflection wave method still has its limitations and a lot of problems have not been solved yet.
尽管低应变反射波法日益得到了工程界的肯定及大力推广，但该方法也有其局限性，尚有许多问题没有解决。
The tests prove that saturated soils are a kind of strain hardened media and stress wave will maintain shock wave characteristic invariant during shock wave dynamic loading.
试验证明，饱和土属于应变硬化介质，在激波动力加载条件下，土中应力波将保持其激波特征不变。
Furthermore, the relationship among longitudinal wave velocity, peak stress and peak strain present different laws according to the types of rocks.
此外，峰值应力与纵波波速、峰值应变与纵波波速的关系依赖于不同的岩石而表现出不同的规律。
Through the comparison of seismic wave attenuation and plastic strain, except for geometrical attenuation, the plastic deformation of coal and rocks is also contributing to energy consumption.
通过地震波的衰减规律与塑性应变变化的比较可见，能量的消耗除了几何扩展衰减外，煤岩体的塑性变形方面也起了一定的作用。
Different wave shapes can be acquired in pile foundation with small strain by means of different types of instruments for detecting.
采用抗混滤波器的检测仪与普通滤波器检测仪进行桩基低应变检测时，得到的波形不尽相同。
This paper analyzeds the theory base, practice and reliability through the application of low strain reflection wave method to test cement-soil mixing pile.
本文结合工程搅拌桩体，对低应变反射波法应用于水泥搅拌桩的理论基础、实际应用与可靠性进行了分析。
It is introduced briefly that the principles of testing piles by low-strain reflected wave, and the factors influencing the quality of pile shaft as well as its applications in actual projects.
简要介绍了低应变反射波测桩的原理，以及影响检测桩身质量的影响因素，并介绍了在实际工程中的应用情况。
A blasting measuring system which include plane wave producer was set up to measure the strain time curves of the rock bar under blasting loading.
以平面波发生器为加载源的爆炸测试系统，直接得出爆炸作用下岩石的应变历程曲线。
The plane-section assumption was not congruous in low strain dynamic tests on pipe piles, so the propagation of stress wave couldn't be expressed by 1D wave equation.
管桩低应变检测时，平截面假定并不满足，应力波的传播不能简单地用一维波动方程描述。
The fatigue tests were performed at room temperature and cyclic strain and stress ratio of 0.1 with triangle load wave.
实验温度为室温，循环应变比和应力比均为0.1，载荷波形为三角波。
It is unable to solve the strain seismic wave of bore hole by wave equation because the mechanical characters of the media models inside and outside bore hole can not be determined.
由于钻孔内外的介质模型的力学性能不能测定，不能用波动方程来解钻孔应变地震波。
It is unable to solve the strain seismic wave of bore hole by wave equation because the mechanical characters of the media models inside and outside bore hole can not be determined.
由于钻孔内外的介质模型的力学性能不能测定，不能用波动方程来解钻孔应变地震波。
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