查询词典 perforated plate

The plastic hinge model of perforated liner casing is built up to calculate the collapse pressure according to the strength and deformation behavior of perforated liner casing subjected to external pressure. The calculation equations of collapse pressure of perforated liner casing with initial ovalization are deduced by energy method. The influences of phrase angle, diameter of perforation, shot density, initial ovalization, diameter-thickness ratio and yield stress on the collapse pressure of perforated liner casing are studied. The model and equations are used to calculate the collapse pressure of an actual perforated liner casing as example.

摘摇要：根据煤层气完井筛管受力特点建立了筛管受力的塑性铰模型，利用能量法推导出带有初始椭圆度筛管抗挤强度的计算公式，分析了相位角、射孔直径、射孔密度、初始椭圆度、径厚比和屈服强度等影响因素对筛管抗挤强度的影响规律，并对某煤矿使用的筛管抗挤强度进行了计算，与已有的实验数据和有限元计算结果进行了对比。

The plastic hinge model of perforated liner casing is built up to calculate the collapse pressure according to the strength and deformation behavior of perforated liner casing subjected to external pressure. The calculation equations of collapse pressure of perforated liner casing with initial ovalization are deduced by energy method. The influences of phrase angle, diameter of perforation, shot density, initial ovalization, diameter-thickness ratio and yield stress on the collapse pressure of perforated liner casing are studied. The model and equations are used to calculate the collapse pressure of an actual perforated liner casing as example.

根据煤层气完井筛管受力特点建立了筛管受力的塑性铰模型，利用能量法推导出带有初始椭圆度筛管抗挤强度的计算公式，分析了相位角、射孔直径、射孔密度、初始椭圆度、径厚比和屈服强度等影响因素对筛管抗挤强度的影响规律，并对某煤矿使用的筛管抗挤强度进行了计算，与已有的实验数据和有限元计算结果进行了对比。

For the multi-layer absorber composed of perforated plate, composed of perforated plate and cavity, composed of perforated plate, porous absorption material and cavity, the absorption coefficient is theoretically calculated.

论文回顾了主动消声、吸声降噪的发展历史与现状，阐述了主动吸声降噪有待解决的关键技术问题，提出了论文的主攻目标和研究内容。

An original Jarlan-type perforated wall breakwater consists of a perforated front wall, a solid back wall and a wave absorbing chamber between them. In practice, the Jarlan-type perforated breakwaters are usually constructed with perforated caissons.

Jarlan型开孔墙式防波堤的基本结构形式包括前开孔直立墙、后实体墙以及前后墙之间的消浪室，在工程应用中经常是将沉箱的前墙开孔，建成开孔沉箱式防波堤。

I factory is specializing in the production of car number plate manufacturing equipment and 92 sets of car number plate manufacturers mold manufacturing and marketing products including the world's leading science and technology production line of car number plate, car plate Private number plate dryer cleaning, car number plate dedicated hydraulic molding machines, car number plate Private electric film machine, car number plate Private tipping machine (also known as a dedicated plate heat transfer machine), car number plate Private mimeographs, 92-style number plates mold.

我厂是专业生产车号牌成套生产设备及92式车号牌模具的生产销售厂家，产品包括具有国际领先科技的车号牌生产流水线、车号牌铝板专用清洗烘干机、车号牌成型专用液压机、车号牌专用电动贴膜机、车号牌专用烫金机、车号牌专用油印机、92式车牌模具。

The business scope covers colored PCM aluminum plate middle-high grade colored coated aluminum plate checkered aluminum plate hairline finished aluminum plate mirror aluminum plate and flat aluminum plate for advertisement and decoration colored PCM plate VCM film faced plate word board solar panel stainless steel and aluminum-zinc plate for refrigerator and ice-box etc.

主营家电用PCM彩涂铝板、中高档广告，装饰用彩涂铝板、花纹铝板、拉丝铝板、镜面铝板、平铝板；冰箱冷柜等家电用PCM彩涂板、VCM覆膜板、写字板、太阳能板、不锈钢，家电用镀铝锌板，拥有进口高精度数控裁剪设备及专业技术人员，现已给海尔，海信、澳柯玛及出口冰箱，冷柜厂家稳定批量供货。

Changzhou Jinshun Railway Rccessories factory founded in 1978, is the production of various kinds of fish plate rail with a specialized factory, professional production of various kinds of insulation fish plate, ordinary fish plate, and emergency first aid for fish plate, abnormal fish plate. frozen fish plate joints, glue joints Merlion CPU boards, the CPU Stickies fish plate at the scene. UIC adhesive joints fish plate, bridge-plate accessories such as railway lines, the products have been sold to the National Railway Bureau, popular user's praise.

常州市金顺铁路配件厂创建于1978年，是生产各类铁路用鱼尾板的专业工厂，专业生产各类绝缘鱼尾板、普通鱼尾板、急救鱼尾板急救器、异型鱼尾板、P60冷冻接头鱼尾板、P60胶粘接头鱼尾板、P60现场胶粘鱼尾板、UIC P60胶粘接头鱼尾板、桥型垫板等铁路线路配件，产品远销全国各铁路局，深受用户的好评。

All the year round to provide a variety of specifications, material billets, carbon plate B \ C \ D \ E, low-alloy plate B \ C \ D \ E, high-strength low-alloy plate, AH390-620, 45 # carbon balance sheet , boiler plate can be bar-8mm-50mm, container boards can be bar-8mm-50mm, Z to the plate, high-built panels, bridge plate, shipbuilding plate, carbon plate, seamless pipe, angle steel, channel steel, flat steel, Medium plate above may bar 8000mm-15000mm, can be bar-width 2170mm-3200mm, Anyang Iron and Steel Company and other products.

常年提供各种规格、材质的钢坯、普碳中板B\C\D\E、低合金中板B\C\D\E，高强度低合金中板，AH390-620，45#碳结板，锅炉中板可扎8mm-50mm、容器中板可扎8mm-50mm、Z向板，高建板，桥梁板、造船中板、普碳薄板、无缝管、角钢、槽钢、扁钢，以上中板长可扎8000mm-15000mm，宽可扎2170mm-3200mm，等安阳钢铁公司产品。

The pressure drop of airflow consisting of pressure drop of the perforated plate and liquid-layer is mainly influenced by the plate dimension and bare tower velocity, with the increasing of bare tower velocity, pressure drop of the perforated plate increases. The experimental data are used to develop a correlation as follows:ΔpD＝1.04×10－82g This correlation should be used whenβ＜5％,0.299m/s＜u＜

空气流动的阻力主要由孔板阻力和液层阻力组成，孔板阻力主要受多孔板的几何尺寸及空塔速度的影响，空塔速度越大，孔板阻力越大，对实验数据进行回归分析得出的实验关联式为：ΔpD＝1.04×10－82g 公式适用范围：β＜5％，0.299m/s＜u＜

A computer host shell, consists of one side plate, backplate installed on this side plate, top and bottom plate respectively installed above and below this side plate and backplate, panel installed on this side plate and opposite with the backplate, and another side plate opposite to this side plate, in which, this side plate is used for installing the mainboard with different frameworks, this backplate includes: one frame, which has one of the first opening and one of the second opening for installing the power supply; one of the first piece, with several slots in parallel and several bar pieces arranged between adjacent slots; one of the second pieces, with a connector opening and several vents; the first piece and the second piece are installed at the second opening in parallel, and both may be removed and exchanged their positions to meet with the mainboard with different framework.

一种计算机主机机壳，包括一侧板、安装在该侧板上的背板、分别安装在该侧板和背板上下两侧的顶板与底板、安装在该侧板上且与背板间隔相对的面板，以及与该侧板相对的另一侧板，其中该侧板用于安装不同架构的主机板，该背板包括：一框架，该框架上设有用以安装电源供应器的一第一开口及一第二开口；一第一片体，其上设有若干并列的槽孔及设在相邻槽孔之间的若干栅片；一第二片体，其上设有一连接器开口及若干通风孔；第一片体和第二片体并列安装在框架的第二开口，且两者均可拆卸并交换两者在框架上的安装位置以适配不同架构的主机板。

It was just a normal day of school

那只是上学的普通一天

Which is a very good reference in this issue.

这是一个在这个问题上很好的参考。