查询词典 pressure element

Used the finite element method computation pipe network resistance thus obtains the ballast water system the line pressure distributed situation. The paper also has carried on the computation to the ballast tank hydraulic loss and has provided the theory basis to the ballast pump optimized design. The overpressure to the ballast tank has been carried on the discussion. The paper also gets the function between the rated flow and the rated pressure of the pump on ships whose BW pipe net is uniform and line is different, which provides a new method for the selection of BW pump.

文章重点讨论了船舶压载水系统的水力计算，使用有限元法计算管网阻力从而得到压载水系统的管路压力分布情况；文章还对压载舱的水力损失进行计算，对压载水泵的优化设计提供了理论依据；文章还对压载水舱过压问题进行讨论；文章对压载水系统相同而航线不同的船舶，利用最小二乘法得到其压载水泵额定流量和额定压头之间的函数关系，为压载水泵的设计和选型提供了新的方法。

In the couping solution, based on the characteristics of the models in this dissertation, each of loading step is finished in unit time. Thus the volumetric strains on the current increment step as analysis parameters are inserted into the equation of continuity and a physical equation for pore water pressure is presented. The fundamental solutions of two kinds of classic problems (axial symmetry and plane strain) are derived. By use of the fundamental solutions of pore water pressure combined with finite element method of soil mechanics, a semi-analytical and semi-numerical method for nonlinear consolidation equations is presented.

在耦合分析中，根据本文模型的特点，将每一荷载增量步看作单位时间完成，对应当前增量步的体变分量作为分析参数代入连续方程，建立了基于数值模型的孔压变化方程，根据工程中最常见的两类问题推导出基本解，结合土骨架的控制方程建立了此类液-固耦合问题的半解析半数值解答体系，编制了有限元程序，从而实现了从建立本构关系到模拟固结问题的全数值方法。

To monitor the internal pressure, the sensing element of the pressure sensor is used.

为监测内部压力，使用压力传感器(S1)的传感元件(1)。

On a number of burst pressure through finite element analysis and software's maximum allowable operating pressure of comparative analysis, verification of the assessment software in project is applicable.

对多个缺陷通过有限元分析得到的爆破压力以及腐蚀缺陷管道综合评价软件给出的最大允许操作压力的对比分析，验证了评价软件在工程上是适用的。

Differential pressure flow elements shall be in accordance with specification SD-00-TSC-CI-0025 "Differential Pressure Producing Flow Element Standard".

差压式流量元件应遵照规范SD-00-TSC-CI-0025&差压式流量元件标准&。

The stresses in the shell of tank and in the structures of opening s at the top and bottom crown of tank under the several conditions including pressure-testing, operating, seismic and pressure circle fatigue were analyzed by means of the finite element analysis.

介绍了1000m3 氧气球罐的应力分析设计，分别对球罐整体及其上下极开孔结构压力试验工况、操作工况、地震工况和压力波动疲劳工况的应力进行了有限元分析，对其应力进行强度和疲劳寿命评定校核。

The three dimensional flow field in the triple-screw extruder with triangle configuration is the research objects of this task, including velocity field, pressure field and shear rate field etc., simulate the representative flow field in metering section of the triple-screw extruder, consisted of three-thread element with75mm pitch, has been simulated at the screw speed of 60, 120, 180, 240 and 300rpm and the flowing regulations in flow field and especially the role of the unique center zone affecting to the conveying and pressure generating ability have also been analyzed.

本课题以三角形排列的三螺杆挤出机三维流场为研究目标，研究内容包括速度场、压力场、剪切速率场等。模拟分析首先以螺距75mm的三头螺纹元件为代表，计算由其构成的三螺杆挤出机在60、120、180、240及300rpm转速下的流场，分析流动规律，并分析了特有的中心区在输送、建压方面的作用。

The following are main contents studied: A finite element method for Navier-Stokes equation with ALE formulation is considered and by combined with theNewmark method of numerical intergration a pressure correction scheme is obtained for the solution of the FE formulation of N-S equation. Because the incompressibility condition can be satisfied approximately in this scheme, the interpolation functions of elements can be equalorder for the velocity field and pressure field. In the ALE formulation the fluid-solid interaction analysis became a three-field coupling problem of the fluid field, the solid field and the fluid dynamic mesh. The properties and charactiristices of this three-field coupling problem are deeply discussed.

研究的主要内容有：主容器中流体大晃动是一种强非线性问题，文中研究了求解ALE描述的粘性流体N-S方程的有限元方法，以有利于大晃动自由液面的跟踪和流体大晃动中非线性现象的描述；并结合Newmark数值积分法推出了求解ALE型N-S方程的压力修正解法，由于这种解法可以近似满足不可压条件，因此可以采用速度场和压力场等阶插值的有限元离散格式，从而较好地解决了普遍采用的不等阶插值解法中，速度场和压力场数值精度不一致、程序编制不便等的不足。

The outside sealing component -corrugated tube of valve can affect outside sealing properties of valve. Through finite element analyse of stress state of corrugated tube, the stress status which are under stretch, compress and stretch-compress action are obtained. Combined with test, the stability, detonation pressure and rigidity of corrugated tube are analyzed. The result showed that corrugated tube is safety under working pressure and when stretch-compress displacement is less than 60% of maxmium displacement.

作为阀门外密封元件的波纹管是影响阀门外密封性能的关键部件，通过对波纹管进行有限元分析，初步掌握了波纹管在拉伸、压缩以及拉伸压缩共同作用下的应力状况，同时采用有限元计算和试验相结合的方法，分析了波纹管的稳定性、爆破压力、刚度等，结果表明，波纹管在工作压力下，拉伸和压缩量达到许用位移的60%时，波纹管工作仍是安全的，为阀门开启量的确定提供了理论依据。

Summary : Pressure relief valve and pressure reducing valve sometimes adjust to press out of order in the usage process , this is mainly because of block of damp finestra of the valve element or pilot valve .

溢流阀，减压阀这两种压力控制元件在液压设备中用处很广泛，溢流阀作用是调节系统压力，减压阀作用是减少某一支路的压力。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。