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饱和压力

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A set of governing dynamic equations with different basic unknowns and with different hypotheses is presented. Thereafter, the 3-D non-axisymmetric governing dynamic equation is solved by means of Fourier expanding and Hankel integral transform method.

在Biot两相介质波动理论的基础上,直接用Fourier展开和Hankel积分变换技术分析三维非轴对称饱和弹性土层和饱和弹性半空间波动方程,首次得到用积分变换形式表示的,三维非轴对称饱和弹性土层和饱和弹性半空间,以饱和土土骨架位移和孔隙水压力为基本未知量的基本解。

Then, the differential equations are solved by the Fourier expanding and Hankel integral transform method. Integral solutions of soil skeleton displacements and pore pressure as well as the total stresses for poroelastic media are obtained. Furthermore, a systematic study on Lamb's problems in transversely isotropic saturated half-space is performed. Integral solutions for surface radial, vertical and tangentical displacements are obtained both in the case of drained surface and in the case of undrained surface excited by vertical and tangentical harmonic resources respectively. Numerical results show the obvious difference between the model of isotropic saturated poroelastic media and that of transversely isotropic saturated poroelastic media.

其次,基于Biot波动理论,在圆柱坐标系下求解了横观各向同性饱和土的Biot波动方程:通过引入位移函数,在圆柱坐标系下将横观各向同性饱和土的Biot波动方程转化为两个解耦的6阶和2阶控制方程,然后根据方位角的Fourier展开和径向Hankel变换,求解波动方程,得到以土骨架位移和孔隙水压力为基本未知量的积分形式一般解,并用一般解给出了饱和土总应力分量的表达式;再以基本解为基础,系统地研究了横观各向同性饱和半空间体的Lamb问题,考虑表面排水或不排水两种情况后,首次得到横观各向同性饱和半空间体在表面竖向和水平谐振力作用的下径向、竖向和周向位移的解析解。

The saturated liquid densities of HFC227ea and the vapor-liquid coexistence curve were measured, the critical temperature and critical density were determined by the critical opalescence phenomenon, and then the critical pressure was determined by vapor pressure equation.

测量了HFC-227ea饱和液体密度和临界区的气液共存线,确定了HFC-227ea的临界温度、临界压力、临界密度;推算了HFC-227ea的饱和气体密度,并验证了其可信度;关联了饱和气液密度,提出了高精度的HFC-227ea饱和气液密度关联式;关联了临界区气液共存线,可精确再现HFC-227ea临界区性质,并根据临界幂定律导出了HFC-227ea的临界指数和临界幅值。

By means of the orthogonal expansion technique, the coupling system solutions are finally obtained. Then the dynamic model of saturated soil layer caused by pile longitudinal vibration is founded. Incorporated wave propagations into saturated soil layer, the characteristics of soil resistance factor and the mechanism of the radial damping are analyzed, as well as distributions of shear stress and pore pressure in saturated soil caused by pile vibration.

然后利用上述解析解分析了饱和土层复阻抗,并从饱和土波动理论出发,建立了桩纵向振动引起的饱和土层振动模式,剖析了辐射阻尼产生机理,研究了桩纵向振动引起的饱和土层中剪应力及孔隙水压力分布。

At many case of bank foundation, such as the case of upper strongness and lower weakness, strong permeable foundation of dyke, strong permeable foundation of dyke containing low penetrability soft intercalation and the dyke foundation by alternation of low and strong penetrability layer, the appropriate condition of various upright seepage prevention measure (whole cut-off wall, half cut-off wall and hanging cut-off wall) and the optimization of seepage prevention measure are analyzed.

从渗流基本理论出发,以压力水头为基本未知量推导多孔介质三维饱和—非饱和、稳定—非稳定渗流问题的微分方程以及方程的有限元格式;在饱和非饱和渗流场的有限元分析中,不仅考虑了饱和区的水体渗流情况,而且也考虑了非饱和区的水分运动情况,将饱和渗流场与非饱和渗流场统一起来进行研究,整个渗流场采用一个支配方程。

Media Help Everyday we are exposed to the steam often divided into two, one, the boiler steam - saturated steam 2, thermal power plants out of steam - superheated steam 1, a relatively stable temperature and pressure saturated steam, temperature lower than 250 ℃, working pressure lower than 1.6Mpa 2, superheated steam temperature and pressure changes of a high base temperature up to 400 ℃, working pressure is lower than 4.0Mpa For the first steam, we usually use soft sealing steam solenoid valve as follows: Structural characteristics This valve is a valve and Balance valves main valve by the two vice components with the second open valve Pilot solenoid valve Heat: electromagnetic part, some with special high temperature seals and sealing materials, electrical materials, and apply a variety of insulation measures Wear: selection and reasonable Globe Valves guidance suite valve cup and clever use of fluid lubrication, reduce wear, increase life expectancy Resistance to condensation: condensation of steam pipeline valve on the steam water is an important factor in action, the valve will not affect the condensation water Other uses - soft sealing steam solenoid valve This series solenoid valve can Safety valves be widely used in textile, printing, chemicals, plastics, rubber, pharmaceutical, food, building materials, machinery, electronics, surface treatment and research sectors and bathroom, dining room, air conditioning automatic control system.

介质说明日常生活中我们接触到的蒸汽常分为两种,1、锅炉蒸汽-饱和蒸汽 2、热电厂出来的蒸汽-过热蒸汽 1、饱和蒸汽温度压力相对稳定,电动阀门执行器温度低于250℃,工作压力低于1.6Mpa 2、过热蒸汽温度压力变化基数较大温度最高可达400℃以上,工作压力则低于4.0Mpa 对于第一种蒸汽,我们通常会选用氧气专用阀、铜阀门软密封的蒸汽电磁阀如下:结构特点本阀是由副阀和主阀两大部件构成的先导式二次开阀的电磁阀耐热:电磁部分、密封件部分用特种耐高温电工材料和密封材料,并应用了各种隔热措施耐磨:选材合理,电站阀门阀杯和导向套间巧妙地利用流体的润滑作用,减少磨损,提高寿命耐冷凝:蒸汽管道的冷凝水是影响蒸汽电磁阀动作的重要因素,本阀则不受冷凝水影响其他用途-软密封蒸汽电磁阀本系列电磁阀还可广泛地应用平衡阀纺织、印刷、化工、塑料、橡胶、制药、食品、建材、机械、电器、表面处理和科研部门以及浴室、食堂、空调等自控系统。

As pollutant migrated into the capillary zone,capillary tension restricted the vertical movement.The pollutant must overcome the entrapment pressure of oil-water interface before entering the capillary zone, and pollutant accumulated on the top of the capillary zone to become pressurized.The pore pressure of pollutant exceeded the entrapment pressure of oil-water interface,and pollutant entered the capillary zone and formed a lens above the groundwater level.

当污染物迁移到地下毛细管区后,其向下的运动将整体受到毛细张力的阻碍,污染物要想进入毛细饱和带必须克服油-水界面的进气压力,这时污染物在毛细饱和带顶部聚集以期获取压力,同时将产生以水平方向为主的迁移,最终随着污染物的压力超过其进气压力,导致污染物进入毛细饱和带,在地下水水位上形成一个透镜体。

The saturation pressure was 921 psia at 232 °F, with a DL stock tank API and molecular of 26.5 and 278 respectively.

饱和压力在有一个 DL 股票箱 API 的232°F是921 psia 和26.5和278的分子的分别。

Calculation ; Predict ; Saturation pressure ; Method

计算法;预测;饱和压力;方法

Firstly, based on the analysis of viscosity data, combined with other methods, a new method is proposed to calculate the viscosity of saturated vapor of halides. The calculation can be done on condition that the critical temperature, critical pressure, critical specific volume, molecular weight and the eccentric factor are known.

在理论研究上,一方面对于卤代烃的饱和蒸气粘度进行了研究分析,并结合其他理论推算方法的优点,提出了一种推算卤代烃的饱和蒸气粘度的新方法,该方法在已知临界温度、临界压力、临界比容、分子质量、偏心因子的情况下,便可以计算在有效对比温度范围内的饱和蒸气的粘度,本方法的适用范围是对比温度T〓在0.5-0.95之间,其对饱和蒸气粘度推算的平均偏差不超过5%。

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