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biot模型
相关语句
  biot model
     Compared with Biot model and BISQ model,the modified BISQ model is easy to express and calculate with similar results to the former two models,being a feasible and new BISQ model.
     通过与Biot模型和BISQ模型的比较,改进BISQ模型计算简单,便于描述,正演模拟结果也与其它二个模型保持一致,是一种可行的新BISQ模型。
短句来源
     Considering the compression of soil grain and pore fluid as well as viscid coupling of pore fluid and soil skeleton, the scattering problem of incident plane P_1 wave (fast compressional wave) by an infinite cylindrical shell embedded in isotropic saturated soils is studied by adopting the amended Biot model.
     考虑土颗粒、孔隙流体的压缩性及孔隙流体与土骨架之间的粘性耦合作用,采用修正的Biot模型,研究了入射平面P1波(快压缩波)在饱和土中不透水的圆柱壳体上的散射问题,得到了散射和折射波场势函数的幅值方程.
短句来源
     The compression of soil grain and pore fluid and viscid coupling of pore fluid and soil skeleton were considered, and amended Biot model was adopted to numerically analyze the influence of incident angle of P_1 wave on vibration characteristics of building foundation with different modules when the reflection and transmission of incident P_1 wave at the interface of saturated soil and building foundation occurred.
     考虑土颗粒和孔隙流体的压缩性以及孔隙流体与土骨架之间的粘性耦合作用,采用修正的Biot模型,对P1波从饱和土体入射到建筑基础的反射和透射时,入射角对不同强度建筑基础的振动特性的影响进行了数值模拟分析。
短句来源
     Considering the compression of soil grain and pore fluid and viscid coupling of pore fluid and soil skeleton,elastic wave scattering by a saturated cylinder in saturated soils was studied by adopting amended Biot model,amplitude equations of potential functions of scattered wave fields and refracted wave fields were obtained,and the variation curves of back-scattered form functions with normalized frequencies and circumferential distribution curves of radical displacements of various normalized frequencies were numerically analyzed.
     考虑土颗粒与孔隙流体的压缩以及孔隙流体与土骨架之间的粘性耦合作用,采用修正的Biot模型,研究了入射平面P1波在饱和土中饱和圆柱体上的散射问题,得到了散射和折射波场势函数的幅值方程,并对背向散射形函数随无量纲频率的变化曲线以及不同无量纲频率的径向位移沿周向的分布曲线进行了数值模拟。
短句来源
     The reflection and backscattering coefficients from BICSQS model,which is abbreviated from the Biot model with contact squirt flow and shear drag,and Biot-Stoll model Seafloors are calculated and compared by poroelastic interface scattering formula. In addition,the effect of bulk relaxation frequency and shear relaxation frequency on the coefficients of BICSQS model is analyzed.
     利用孔隙弹性介质界面的声波散射公式计算对比了以Biot-Stoll模型和附加颗粒间喷射流及剪切阻力的Biot模型(简记为BICSQS模型)描述的海底的光滑平面反射系数和粗糙界面的背向散射系数,并分析了BICSQS模型中体积弛豫频率和剪切弛豫频率对其结果的影响。
短句来源
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  “biot模型”译为未确定词的双语例句
     Based on the modified Biot′s theory of two-phase porous media, a study was presented on seismic reflection and transmission coefficients at an air-water interface of saturated porous soil media.
     基于修改的Biot模型,研究地震波在气饱和土中的传播特性以及地震波在饱和土中气、水界面上的反射和透射.
短句来源
     A linear porosity-modulus relation based on experimental data is used to determine the material parameters for Biot's model.
     采用一种基于实验数据的孔隙率和模量之间的线性关系来确定Biot模型中的介质参数。
短句来源
  相似匹配句对
     E model of CRM.
     E模型
短句来源
     This improved mixing dielectric model yields an excellent fit to measured data.
     模型
短句来源
     The well known Biot's theory is a. special case of the model.
     Biot理论是本模型的特例.
短句来源
     Multi-model Biot consolidation finite element method analysis
     多模型Biot固结有限元分析
短句来源
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  biot model
The maximum attenuation determined from spectral analysis of the measured signals closely matches the characteristic frequency predicted by the Biot model.
      
Mathematical models under research are the Biot model and its generalization by consideration of viscous stresses inside liquids.
      
Distinctions of wave propagation in the context of the Biot model and its generalization are shown.
      
The data can be accounted for by a Biot model of the 3He liquid in the porous aerogel.
      
The effective model of a stratified solid-fluid medium as a special case of the Biot model
      
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Based on clear physical concepts, complete nonlinear dynamic equations of two-phase media are derived by using classic mechanical principle directly. Then, two conditions under which the nonlinear equations can be linearized are expounded. The conditions are that varieties of the porosity and density with spatial position are much smaller than those with time in the dynamic process, and alterations of the displacement and pore fluid pressure induced by porosity or density changes can be omitted. Thus, the variables...

Based on clear physical concepts, complete nonlinear dynamic equations of two-phase media are derived by using classic mechanical principle directly. Then, two conditions under which the nonlinear equations can be linearized are expounded. The conditions are that varieties of the porosity and density with spatial position are much smaller than those with time in the dynamic process, and alterations of the displacement and pore fluid pressure induced by porosity or density changes can be omitted. Thus, the variables of displacement and pore fluid stress are decoupled with porosity and density variables, and can be resolved independently. Furthermore, the inconsistency that the porosity and density keeping constant is in contradiction with the compressible pore fluid and deformable skeleton assumption in two phase models (including Biot′s) is also clarified through linearization. After comparing some two phase models, the following conclusions are obtained. Firstly, the only differences between them lie in the constitutive relation; secondly, the soil mechanics′ model is a special case of the Biot′s and Zienkiewicz′s model.

本文以清楚的物理概念 ,依据经典力学原理建立了两相介质完整的动力学非线性方程组。然后 ,阐明了将此方程组线性化的条件 :孔隙率、密度随空间的变化远小于它们在该处随时间的变化 ;孔隙率、密度的变化所引起的位移和孔压等量的变化可以忽略不计。在此条件下 ,位移、孔压等变量与孔隙率和密度变量解耦 ,可独立地进行求解 ,澄清了Biot等模型中隐含的矛盾 ,即孔隙率和密度不变与孔隙流体可压缩和骨架可变形之间的矛盾。最后 ,通过比较几种常用的模型 ,指出它们之间的主要区别在于本构关系和连续性方程 ,且土力学模型是Biot模型和Zienkiewicz模型的特例

The slow compressional wave (P2 wave) in porous media based on BISQ model is investigated. The low frequency approximate expression for velocity and attenuation of P2 wave is presented. Compared with Biot model, BISQ model predicts that the attenuation of P2 waves is very large at low frequency and decreases with increasing characteristic squirt flow length ( R ), the velocity low frequency limit is not zero and decreases with increasing R , variation of the ratio of pore fluid displacement to bulk...

The slow compressional wave (P2 wave) in porous media based on BISQ model is investigated. The low frequency approximate expression for velocity and attenuation of P2 wave is presented. Compared with Biot model, BISQ model predicts that the attenuation of P2 waves is very large at low frequency and decreases with increasing characteristic squirt flow length ( R ), the velocity low frequency limit is not zero and decreases with increasing R , variation of the ratio of pore fluid displacement to bulk displacement is similar to that of attenuation and its phase is different from that of Biot model. The seepage flow induced by P2 wave at the fluid porous media interface is larger than that of Biot model. For the sake of contrast, the properties of the fast compressional wave are also presented. Two conclusions are induced from the BISQ model: there is no squirt mechanism in inviscid fluid saturated porous media and there is no “dynamic compatibility” phenomenon in viscid fluid saturated porous media.

着重研究了多孔介质BISQ模型中慢纵波的基本特性 .给出了BISQ模型下慢纵波速度和衰减的低频近似公式 .与Biot理论对比 ,BISQ模型中慢纵波的衰减随频率降低急剧增大 ,且随喷射流长度的减小而增加 ;相速度随喷射流长度的减小而增加 ,其低频极限值不是零 ;孔隙流体位移与固相骨架位移之比的幅值随喷射流长度的增加而减小 ,其相位特点与Biot模型预测的不同 ;在流体与孔隙介质的边界上可产生更大的渗流 .为对比 ,同时也给出快纵波的行为 .依据BISQ模型可推断 :非黏滞流体饱和孔隙介质中不存在喷射流机理 ;BISQ模型中不会发生“动力协调”现象

In situ compressional wave velocity and attenuation measurements were made at 2 carbonate sediment sites over a frequency interval between 20 and 100 kHz. Velocity dispersion, while slight, appears in the data. Velocities increase from 1691 to 1708 m/s at Site H3 and from 1579 to 1585 m/s at Site H4 as the frequency increased. Effective attenuation ranges from 15 to 75 dB/m at Site H3 and from 22 to 62 dB/m at Site H4. Parameters determined by core analysis were fixed in Biot-Stoll models and inversion of velocity...

In situ compressional wave velocity and attenuation measurements were made at 2 carbonate sediment sites over a frequency interval between 20 and 100 kHz. Velocity dispersion, while slight, appears in the data. Velocities increase from 1691 to 1708 m/s at Site H3 and from 1579 to 1585 m/s at Site H4 as the frequency increased. Effective attenuation ranges from 15 to 75 dB/m at Site H3 and from 22 to 62 dB/m at Site H4. Parameters determined by core analysis were fixed in Biot-Stoll models and inversion of velocity and attenuation data was used to evaluate the 6 unmeasurable parameters. It is found that Site H3 (porosity is 44%) has lower tortuosity, higher permeability and average pore radius than Site H4 (porosity is 56%)after inversion. Good fits were achieved for both velocity datasets, but corresponding modeled attenuation is low. An increase in the low frequency logarithmic decrement well above Stoll’s recommended values allowed fits to both velocity and attenuation very well.

对夏威夷檀香山岛的两个站(H3和H4)钙质沉积物进行了20~100kHz的原位纵波声速和声衰减测量.它们均有轻微的频散.随频率的增加H3站位声速从1691m/s增加到1708m/s,H4站位的声速从1579m/s增加到1585m/s.随频率的增加H3站位的有效衰减从15dB/m增加到75dB/m,H4站位的有效衰减从22dB/m增加到62dB/m.运用Biot Stoll模型对所测得的纵波速度和声衰减数据进行了Biot模型未知参数反演,发现粒径较大的H3站的沉积物(孔隙率为45%)比粒径较小的H4站的沉积物(孔隙率为56%)具有曲率小和渗透率及孔隙半径都大的性质.

 
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