查询词典 elastic wave

In order to study the influence of defect on the surface acoustic wave,based on the theory of elastodynamics,the interaction between elastic surface acoustic waves and surface-breaking defect was simulated numerically by means of the finite element method.

为了分析材料表面缺陷对声表面波传播的影响，以弹性动力学理论为基础，采用有限元方法数值模拟了声表面波沿金属表面传播及其与表面缺陷的相互作用。

In the text, the Spectral element method is used to model the seismic wave propagation, which is based on a weak formulation of the elastic mechanics equation. It combines the geometrical flexibility of the Finite element method and the accuracy of the pseudospectral method.

本文采用谱元法对横向同性介质中的地震波进行模拟，该方法基于弹性力学方程弱形式基础之上，具有有限元适应任意复杂介质模型的韧性和伪谱法的精度。

This paper deals with the problem of nonlinear inversion of the SH wave equation in a homogeneous isotropic elastic half space with both transmitters and receivers in the bore hole.

讨论了均匀各向同性弹性半空间SH波动方程的非线性反演问题。

Based on wave propagating in three directions of elastic foundation, vibrating displacement could be assumed to be in three forms along three directions. Hooke's law and theory of waves were adopted to deduce the formula of coupled viscous boundary. The coupled viscous boundary could be applied in finite element method.

根据波在地基的3个方向都可以进行传播的特点，假定了地基中质点沿3个方向的振动表达式，通过胡克定律和波动理论，推导了弹性地基中三维动力问题的耦合粘性边界的公式。

Fresnel thought that the light vibration is one continuous medium- by condition mechanical elastic vibration, he supplemented the huygens' principle by the Young interference principle in 1835, from this has had the Huygens - Fresnel principle which is familiar by people, with this principle can either completely explain the light straight line dissemination,or can discuss the diffraction phenomenon,and it becomes a important principle in the wave optics.

菲涅耳认为光振动是一种连续介质-以态的机械弹性振动，他于1835年以杨氏干涉原理补充了惠更斯原理，由此产生了今天人们所熟知的惠更斯-菲涅耳原理，用这个原理既能圆满地解释光的直线传播，也能讨论衍射现象，成为波动光学中的重要原理。

An integral representation for displacements of a circular footing vibrating vertically with a linear wave velocity on a elastic half-space whose shear modulus changes non-linearly with depth was presented by analysis, dynamic triaxial test on dynamic modulus and damping ratio of soils was also carried out.

本文通过计算分析得到了变剪切模量弹性半空间上基础竖向振动的积分变换解，并且进行了场地土动力特性试验研究。

The second and higher order elastic constants ofsome selected specimens are measured mainly by means of longitudinal wave entrance.

研制了基于计算机辅助信号处理与分析的材料弹性常数超声测定实验系统，对几种试件的二阶和高阶弹性常数进行了实际测定。

Sound is a mechanical disturbance of a wave nature that propagates through any elastic medium at a speed characteristic of that medium.

声音是一种自然波的机械振动，通过弹性介质传播，速度取决于由该介质的特性。

To avoid the present of pseudo-wave caused by the discretization of near-surface layer, an orthogonal polynomial expansion method has been developed to study the acoustic waves propagating in metals with continuous changes of near-surface elastic properties.

用一个适当阶数的多项式来表示表面层的弹性性质沿厚度方向的空间分布，这能够很好的反映其表面性质到未受影响下层性质的连续分布。

In this paper, the analytical expressions of seismic input for homogeneous elastic half-space are first derived in oblique incidence of plane SV-wave, and then a finite element model for a real hydropower cavern group composed of main powerhouse- transformer chamber- tailrace surge tank cavern is created. Characteristics of seismic responses such as displacement, acceleration and stress are studied in detail at different incidence angles and some results are compared with those given by the literature.

本文首先推导了平面SV波斜入射下均质弹性半无限空间的地震动输入表达式，然后建立了某水电站主厂房室-主变室-尾水调压室等构成的地下洞室群有限元模型，详细研究了不同入射角度下各洞室的位移、加速度、动应力等地震反应特点，并与文献进行了对比。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新