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高压压
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  high pressure die
     The Control of Impact Pressure in the High Pressure Die Casting Process
     高压压铸工艺中冲击压力的控制(上)
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  “高压压”译为未确定词的双语例句
     THE HIGH PRESSURE CONLIDATION AND MAGNETISM OF AMORPHOUS Fe40 Ni38 No4B18( 2826MB) POWDER
     非晶态Fe_(40)Ni_(38)_Mo_4B_(18)(2826MB)合金粉末的高压压结与磁性研究
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     Application of High Pressure Water Pressure Test in Pressure Tunnel Design
     高压压水试验在压力隧洞设计中的应用
短句来源
     Simulation Analysis of High Pressure Aluminum Alloy Die Casting
     铝合金高压压铸模拟分析
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     Application of high water-pressure test to deep borehole
     高压压水试验在深钻孔中的应用
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     Application research of high water pressure test for deep buried and pressuring chamber projects
     钻孔高压压水测试在深埋与承压洞室工程中的应用研究
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  相似匹配句对
     Under Balance Testing Technology in High Pressure Wells.
     井负测试工艺
短句来源
     Simulation Analysis of High Pressure Aluminum Alloy Die Casting
     铝合金铸模拟分析
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     Nose Acupoint Pressure Therapy
     鼻疗法
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     die-casting.
     铸法。
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  high pressure die
Interfacial heat transfer coefficient between metal and die during high pressure die casting process of aluminum alloy
      
The present work focused on the determination of the interfacial heat transfer coefficient (IHTC) between metal and die during the high pressure die casting (HPDC) process.
      
In high pressure die casting processes, a die plays a critical role in removing heat from the molten metal during the cavity filling and solidification stages.
      
Soldering reactions are commonly observed during high pressure die casting of aluminium alloys, and involve the formation and growth of interfacial intermetallics between the die and the cast alloy.
      
Some AM60B magnesium alloys sheets produced by High Pressure die Casting were Friction Stir Processed and the mechanical and microstructural features are presented in the present study.
      
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Because conventional photoelastie materials have a stress-optical constant ratio B/A of about - 0.5 in the frozen state, three dimensional stresses could not be determined by analyzing the holo-photoelastic patterns of slices cut from three dimensional models made of these materials. This paper presents a new processing and frozen technique of photoelastie materials that have stress-optical constant ratio remote from -0.5. These materials can be used directly in the general three-dimensional stress analysis...

Because conventional photoelastie materials have a stress-optical constant ratio B/A of about - 0.5 in the frozen state, three dimensional stresses could not be determined by analyzing the holo-photoelastic patterns of slices cut from three dimensional models made of these materials. This paper presents a new processing and frozen technique of photoelastie materials that have stress-optical constant ratio remote from -0.5. These materials can be used directly in the general three-dimensional stress analysis by holophotoelastic method. Illustration of the interior normal stresses in a sphere, subjected to compression along a diameter is presented, and experimental results are compared with theoretical solution.

本文介绍了进行三维应力分析的全息光弹性方法及有关技术,分析了全息光弹性方法的主要困难在于冻结材料的应力光学常数比B/A接近-0.5,并提供了一种新的光弹性材料制作和冻结工艺。这种材料冻结时的应力光学常数比可以远离-0.5。用这种材料制成的三维模型,可以通过全息光弹性方法获得三维应力的全应力实验解答。用这种方法测定了对径受压圆球和高压压头对称断面上的应力分布。实验结果和理论解进行了比较。

A brief view and results of tests for the effects of the inlet total pressure distortion on the performance and the stability of a two-spool turbojet engine are presented. There are a 3-stage H. P. compressor and a 3-stage L. P. compressor in the engine, in which two types of the first stage rotor G02 and 5P are tested separately. The distortion was generated by metallic mesh screens and the compressor surge was induced by a fuel flow step generator.It could be seen from the test results that when the area of...

A brief view and results of tests for the effects of the inlet total pressure distortion on the performance and the stability of a two-spool turbojet engine are presented. There are a 3-stage H. P. compressor and a 3-stage L. P. compressor in the engine, in which two types of the first stage rotor G02 and 5P are tested separately. The distortion was generated by metallic mesh screens and the compressor surge was induced by a fuel flow step generator.It could be seen from the test results that when the area of the jet nozzle increases from 100% to 142%, the operating line of L. P. compressor falls significantly, no matter whether the inlet airflow is distorted or not.The engine with G02 or 5P first stage rotors has surged 42 times. The surge line and operating line were determined with and without distortion. Test results are given in relationship of the pressure ratio to corrected mass flow and corrected speed.The inlet distortion caused the surge line and operating line of the H. P. and L. P. compressors to be moved downward, and the surge margin decreased. The greater the distortion index, the steeper the surge line falls. When the distortion index increases, the operating line falls slightly, the loss in surge margin increases. The quantitative relationship of the above-mentioned trend is shown with curves of test data in the paper.Comparing the engine test results with the rig test results, the surge line of the L. P. compressor obtained from engine test is higher than that from rig test, no matter whether the inlet airflow is distorted or not. This confirms that the surge margin and the compressor characteristic lines are effected not only by the inlet conditions, but also by outlet conditions, the interaction between compressor and other components, the initial process of surging and the difference between quasi-steady flow and dynamic flow. The characteristic lines of an independent component could not be simply used as a substitute for that of the compressor coupled with other components in a engine. That is, the test results of certain component obtained on test rig under specified conditions could not be considered as a reasonable base for evaluation of its performance and stability in an engine system.

介绍进气总压畸变对双轴涡喷发动机性能和稳定性影响的试验及其结果。试验在地面台架进行。发动机为低压和高压各三级、中等增压比加力式双轴涡喷发动机。 稳态周向压力畸变由90°扇形纱网造成。测定了不同堵塞比的纱网或叠合纱网产生的畸变幅度随发动机空气流量的关系曲线。 在有畸变和无畸变条件下,对装有两种不同展弦比的第一级超音级压气机叶片的发动机,分别测定喘振边界线和工作线,给出低压和高压压气机喘振裕度变化规律,对比试验结果进行了初步分析。 改变发动机喷口面积比由100~142%,在三种畸变和无畸变条件下进行了充分的稳、动态试验,发动机未出现不稳定工作情况。给出无畸变时工作线随喷口面积比变化曲线。 试验采用公司自行设计调试成功的燃油阶跃装置,逼喘双轴涡喷发动机42次。分别获得高压和低压压气机喘点84个以及进喘过程的示波曲线,简要分析了喘振过程参数变化特征。

A Mini-Projector Lens has been designed for the image intensifier system of 1MV

用有限元程序设计了1MV高压压电子显微镜图象增强系统中的微型投影镜。设计中采用了Mulvey的单极靴投影镜。利用水冷时,透镜激励线圈绕组中的电流密度可达到3000安匝/厘米~2,透镜磁铁的直径可缩小到130毫米。透镜半投射角为12°时,图象边缘相对螺旋畸变小于3%。对实际加工出来的透镜进行了磁场测量,测得的轴上磁感应强度分布和计算值很好地符合。

 
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