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A pressure disturbance cannot drive the energy release profile uniformly to the anti-node region to result in a sustained longitudinal wave. 压力扰动不可能驱使能量释放分布图移至波腹区域以产生持续的纵向波。
Secondly, the relation between longitudinal wave propagation velocity and resin-bonded stiffness of full length anchoring bolt is simulated. 然后模拟纵波在全长锚固锚杆内传播速度与树脂-围岩粘结刚度之间的关系；
This paper deduces the errors sources from the process of ultrasonic longitudinal wave testing and evaluates its uncertainty. 本文分析了超声波探伤纵波检测的误差来源，评定了在探伤过程中的不确定度。
Secondly,the relation between longitudinal wave propagation velocity and resin-bonded stiffness of full length anchoring bolt is simulated. 然后模拟纵波在全长锚固锚杆内传播速度与树脂-围岩粘结刚度之间的关系;
Upon the interface of homogenuous isotropic elastic media the incident longitudinal wave produces the reflected longitudinal (P-P) wave and upgoing converted shear (P-SV)wave. 在均匀各向同性介质的分界面上入射纵波时，除产生纵波反射P-P波外，还会产生转换横波的反射P-SV波。
Contrast with common vertical longitudinal ultrasonic wave, slant longitudinal wave could be applied to test the nozzle welds on vessel, header, bolts and austenite material. 介绍了超声纵波斜入射法在电站锅炉压力容器管座角焊缝、螺栓和奥氏体钢锻件等部件探伤中的应用。
The longitudinal wave cannot exist near the surface of a solid, and those exist near it are gliding irrotational waves. 纵波不能在固体表面存在,在固体表面存在的是相应的滑行集散波。
The dispersion curves and simulated dispersion relationship of longitudinal waves without the Langmuir wave, the ion sound wave and the ion plasma wave are obtained. 得到了除朗缪尔波、离子声波和离子等离子体波外其它纵波的色散曲线和拟合色散关系。
Numerical results demonstrate that laser generated surface acoustic wave is comprised with three components, namely surface skimming longitudinal wave, surface shear wave and Rayleigh wave. 数值结果表明：在激发的超声表面波中包括掠面纵波、表面横波和单极性的Rayleigh波等三种模式。
Chapter 4 presents the study on the longitudinal wave propagation and dispersion in single-walled carbon nanotubes through the use of the continuum mechanics and the molecular dynamics simulation based on the Terroff-Brenner potential. 用连续介质力学方法及基于 Tersoff-Brenner 势的分子动力学方法对比研究了碳纳米管中纵波的传播及频散问题。主要考虑了微结构对碳纳米管中纵波频散的影响。
The result of analysis shows that the travel time of the refracted arrival of the longitudinal wave has a linear relationship with porosity over a fairly broad range, it has nothing to do with the variations of frequencies and coefficient of permeability. 结果表明:滑行纵波(第一类纵波)的声波时差与孔隙度在相当宽的范围里有近线性的对应关系而与频率和渗透系数的变化几乎无关;
Based on the propagation theory of the longitudinal wave in the pile, the present paper presents a technique for determining such parameters as back-and-forth time of reflection wave and apparent reflection coefficient. 摘要本文以纵波在杆中传播的理论为根据，介绍一种用于确定反射波往返时及视反射系数等参数的方法。
It is pointed out that the wave of plasma channel can be decomposed into transversal and longitudinal wave, and different effects of the wave on the material removal in different pulse width are analyzed. 指出放电通道的波动可以分解成纵波和横波2个分量，并分别分析了短、长脉冲加工时横波和纵波对材料蚀除的不同影响。
Utilizing the characteristic of the ultrasonic longitudinal wave,a new method that judges the density of oil by measuring time difference and phase place is put forward,and an instrument is designed. 利用超声波纵波的特性,提出一种利用超声波在油料中传播的时间差和相位差两项指标综合判定油料密度的方法,并设计了检测装置。
In longitudinal waves, it is measured from compression to compression or from rarefaction to rarefaction. 在纵波中是以密波与密波或疏波与疏波之间的距离来量度的。
Based on analysing the geneses of gravel sand reservoir in tan-hai area, the reservoir lithology is identified with cross plot technique of yang surname modulus and longitudinal wave slowness. 摘要通过对滩海地区含砾砂岩储层成因的分析，利用杨氏模量与纵波时差交会图法识别出岩性。
A low-frequency multi-mode ultrasonic Lamb wave method suitable for characterizing shear and longitudinal wave velocities, thickness and density of ultra-thin elastic layers is presented. 提出了用低频多模式超声兰姆波定征方法来估计超薄弹性层的纵波声速、横波声速、厚度和密度等参数。
Unfortunately the shock conditions for accompanying longitudinal waves cannot be inferred at the outset without having detailed information about the shear wave. 很可惜，对伴随的纵波，冲击波条件却不能从一开始就在没有剪切波的详尽知识的情况下推测得出。
Moreover, according to occultism, astrological forces are vibrations which are transmitted to earth via an infinite number of longitudinal waves through the ether. 此外，依照神秘主义，占星的作用是波动变化的，是通过一个无限大的数字的经度波动浪穿透空间传输到地球上。
A little apart from the surf ace, the longitudinal wave beam may exist and propagate parallel to the surface,yet has to connect with its corresponding gliding irrotational waves. 离开固体表面稍远的区域,可以有平行于表面传播的纵波声束存在,但是需要与相应的滑行集散波相互衔接。