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equivalent media
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  等效介质
     The effective moduli of composite reinforced by spherical coating particles are investigated by the four phase spheroidal model and the theory of equivalent media. The theoretical predicting formulae of bulk modulus and shear modulus have been derived for this kind of composite in this paper. These formulae can reduce to the results of three phase spheroidal model which had been obtained by others for composite reinforced by particles.
     本文通过四相球模型和复合材料的等效介质理论,研究了球形涂层粒子增强复合材料的有效模量性质,得到了这种增强复合材料的有效体积模量和有效剪切模量的理论预测公式·这些结果在特殊情况下,可退化到三相球模型确定的球形粒子增强复合材料的有效模量公式·
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  equivalent media
This has created a need to discover structural equivalence relationships from the databases since queries tend to access information from structurally equivalent media objects residing in different databases.
      
The effective moduli of composite reinforced by spherical coating particles are investigated by the four phase spheroidal model and the theory of equivalent media.
      
The packed groups of statements are then checked for dependences, scheduled, and the equivalent media instructions are emitted.
      
At that point the statements are ready to be replaced with an equivalent media instruction.
      


On the basis of equivalent media theory in composite mechanics,the effective moduli of a composite of hollow spheres in a matrix are determined by four phase spheroidal model.The relations of bulk modulus and shear modulus with the volume fraction of hollow spheres of a composite have been derived in this paper.For the isotropic material,the Young's modulus of material are also determined and the present results are compared with the experimental and theoretical data given by Huang et al.It has shown that...

On the basis of equivalent media theory in composite mechanics,the effective moduli of a composite of hollow spheres in a matrix are determined by four phase spheroidal model.The relations of bulk modulus and shear modulus with the volume fraction of hollow spheres of a composite have been derived in this paper.For the isotropic material,the Young's modulus of material are also determined and the present results are compared with the experimental and theoretical data given by Huang et al.It has shown that the Young's modulus of composite predicted by the present model in the whole range of volume fraction of hollow spheres are nearer to experimental results than the Huang's model.In addition,by considering the effects of voids on properties of material,some better theoretical results which is quite agreement with experimental data can be obtained.

用四相球模型确定了含空心球复合材料的有效模量性质,得到这类材料的有效体积模量和有效剪切模量同空心球体积比的关系.在各向同性材料的假设下也确定了材料的有效杨氏模量,并同Huang等人给出的理论及实验结果进行了比较.

The effective moduli of composite reinforced by spherical coating particles are investigated by the four phase spheroidal model and the theory of equivalent media. The theoretical predicting formulae of bulk modulus and shear modulus have been derived for this kind of composite in this paper. These formulae can reduce to the results of three phase spheroidal model which had been obtained by others for composite reinforced by particles.

本文通过四相球模型和复合材料的等效介质理论,研究了球形涂层粒子增强复合材料的有效模量性质,得到了这种增强复合材料的有效体积模量和有效剪切模量的理论预测公式·这些结果在特殊情况下,可退化到三相球模型确定的球形粒子增强复合材料的有效模量公式·

The estimation of gas hydrate sediment velocity is an important component of the seismic methods and technical research on hydrate. There are three kinds of micromodel for hydrate in media pore: suspending, grain contact and cementation. With experimental models, several methods of velocity estimation are studied. The applicability and condition of application of those methods, especially the Time average Equation, Wood Equation, Lee Weight Equation and equivalent media are emphasized. The results demonstrate...

The estimation of gas hydrate sediment velocity is an important component of the seismic methods and technical research on hydrate. There are three kinds of micromodel for hydrate in media pore: suspending, grain contact and cementation. With experimental models, several methods of velocity estimation are studied. The applicability and condition of application of those methods, especially the Time average Equation, Wood Equation, Lee Weight Equation and equivalent media are emphasized. The results demonstrate that there is a condition of application for every method, and the most applicable methods for suspending model, grain contact model and cementation model are Wood Equation, Lee Weight Equation and Time average Equation, respectively. Lee Weight Equation is more applicable by reasonably adjusting the weight factor.

天然气水合物沉积介质速度的估算是水合物人工地震探测理论方法和技术研究的组成部分。文中针对水合物在介质孔隙中悬浮、颗粒接触和胶结 3种微观模式 ,对前人估算其速度的多种方法进行了分析研究 ,结合试算模型 ,重点考查时间平均方程、伍德方程、李权重方程和等效介质等方法估算速度的适用性和使用条件。研究结果表明 ,每种方法都有其适用和不适用 (或不太适用 )的条件 ,水合物悬浮模式、颗粒接触模式和胶结模式 ,最为适宜使用的速度估算方法分别是伍德方程、权重方程和时间平均方程。权重方程在合理调整权重参数时有较宽的适用性。

 
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