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elastic dynamics theory
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  弹性动力学理论
     In order to study the transmitting characteristics of ultrasonic guided wave in pipe and select the guided wave mode suitable for non-destructive testing(NDT), the authors analyse, on the basis of elastic dynamics theory, the characteristics of multimode and dispersion of guided wave transmitted in pipe.
     为了研究超声导波在管道中的传播特性并从中选择适合于无损检测的导波模态,在弹性动力学理论基础上,分析了超声导波在管道中传播时存在多模态与频散特性;
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     In this paper,the governing equations of the seabed and pipeline are formulated based on the Biot's theory of consolidation and elastic dynamics theory respectively. The seabed-pipeline interaction problem is investigated by using the friction contact theory and the finite elements method.
     为此考虑管线的柔性,分别采用饱和孔隙介质的Biot动力固结理论和弹性动力学理论列出了海床与管线的控制方程,进而采用摩擦接触理论考虑海床与管线之间的相互作用效应,基于有限元方法建立了海床-管线相互作用的计算模型及其数值算法。
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  “elastic dynamics theory”译为未确定词的双语例句
     To cope with inho-mogeneous weak scattering,the relation between scattering field and model parame-ters can be derived from elastic dynamics theory.
     针对非均匀弱散射情形,由弹性动力学可得出散射场与模型参数的关系。
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     By means of the elastic dynamics theory, a simplified impact load was obtained, and then the dynamic radial displacements of the cylindrical shells were determined.
     并根据弹性动力学基本理论给出了等效圆柱受的冲击力的一种计算方法 ,进一步得到了冲击下的圆柱壳的位移关系。
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     The curvature radius was derivated and the contact stress of the three-arc-sect isometric type surface was calculated through the elastic dynamics theory.
     应用弹性力学理论,推导出接触点的曲率半径,对三弧段等距型面联接进行接触应力计算。
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  相似匹配句对
     Dynamics of Elastic Impact Oscillators
     弹性碰撞振子的动态行为
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     RAYLEIGH-RITZ METHOD IN ELASTIC DYNAMICS
     弹性动力学中的瑞利-里兹法
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     This paper summarizes the basic theory of elastic dynamics.
     论文对弹性动力学基础理论进行了概述。
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     Process Dynamics
     化工过程动态学
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     On the Dynamics of Topic
     话题的动态性
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The research on seismic inverse problem stimulates the vigour of the classicalelastic theory. It is the most advanced subject involving geophysics,geology,appliedmathematics etc. Especially the seismic exploration,a branch of geophysics,can ac-tually be considered as a inverse problem research;it analyses recorded wave fieldinformations and then reconstructs formation and lithology structures so as to dis-cover oil and gas.Inverse problem is more difficult than forward one because of ill-posed proper-ty. Theoretically...

The research on seismic inverse problem stimulates the vigour of the classicalelastic theory. It is the most advanced subject involving geophysics,geology,appliedmathematics etc. Especially the seismic exploration,a branch of geophysics,can ac-tually be considered as a inverse problem research;it analyses recorded wave fieldinformations and then reconstructs formation and lithology structures so as to dis-cover oil and gas.Inverse problem is more difficult than forward one because of ill-posed proper-ty. Theoretically and practically,the elastic wave inversion in this article is a leadingedge subject. The recorded wave field is abstracted as element d of data space,whichis nonlinear with element m of model space. The distributions of d and m can be de-scribed by using Gaussian probability density,and the least square solution repre-sents the estimated maximum likeIihood solution m of inversion. To cope with inho-mogeneous weak scattering,the relation between scattering field and model parame-ters can be derived from elastic dynamics theory. Finally,the gradient vectors of as-sociated problems are expressed as model parameters(Lame coefficient,wave veloci-ty and density)in tirnesispace and frequency domains, and the estimated solution ex-pressions are also given here.

地震反问题的研究给经典弹性理论注入了活力,它是力学与交叉学科(地球物理学、地质学,应用数学等)的高难课题。地球物理,特别是地震勘探,实质上可归结为反问题的研究,它通过接收的波场信息来重建地层及岩性构造,以达到油气识别和勘探开发的目的。反演因其不适定性而较正演的难度要大。本文探讨的弹性波反演是理论和应用的前沿课题,文中将测量波场抽象为数据空间元素d,d与模型空间元素m呈非线性关系。利用高斯概率密度可描述d、m的分布规律,其最小二乘解代表反演极大似然解估计m。针对非均匀弱散射情形,由弹性动力学可得出散射场与模型参数的关系。最后在时空域和频率域将伴随问题的梯度矢量具体表示为模型参数(拉梅系数,波速,密度),并给出了解估计表达式。

Under the assumption of the existence of an equivalent column which has the same failure behavior as the composite shells following axial impact, the failure of the shells was reduced to a one dimensional problem. An equivalent law was introduced in this paper. By means of the elastic dynamics theory, a simplified impact load was obtained, and then the dynamic radial displacements of the cylindrical shells were determined.

将圆柱壳受轴向冲击破坏等效为一均质圆柱的破坏 ,给出了等效参数的确定方法 ,从而使圆柱壳的破坏分析简化为一维问题。并根据弹性动力学基本理论给出了等效圆柱受的冲击力的一种计算方法 ,进一步得到了冲击下的圆柱壳的位移关系。

The finit element method concept is introduced based on the elastic dynamics theory. And the realization of optimization design is obtained by applying the finit element method.

概述了有限单元法的基本思想 ,并从弹性力学基本理论出发简述了其原理 ;介绍了运用有限单元法解决实际问题 ,实现优化设计的过程

 
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