critical speed of 中文意思是什麼
critical speed of
解釋
臨界轉速-
Based on refering to a great quantity of domestic and international data, this dissertation puts forward the standpoint that giving systematical diagnosis to mechanical and electrical equipment with the double turnplate strike crusher as example. by means of calculating critical rotation speed of inner turnplate, theory foundation is offered to the crusher ' s improvement. based on actual situation of the crusher, a portable observation and diagnosis system has also been developed on the basis of virtual instruments
本文在查閱大量國內外文獻的基礎上，以雙轉盤沖擊破碎機為實例，提出了機電設備系統診斷的技術思路；通過計算內轉盤臨界轉速，為破碎機的改進提供了理論依據和方法；結合破碎機的實際使用情況，開發了性價比較高的、基於虛擬儀器技術的破碎機監測系統。 -
Speedy calculation of critical speed of vacuum pump
真空泵臨界轉速的快速計算 -
The influences of structure variables such as impeller types, baffle configurations, gas sparger, and operational variables such as gas rate, particle fraction on critical suspension speed of floating particle in an agitated vessel were investigated
摘要探討了攪拌槳型、擋板和氣體分佈器等結構因素及氣體流量、顆粒質量分數等工藝因素對下沉顆粒三相體系臨界攪拌轉速的影響。 -
The paper analyses the particle radial separating speed in inertia field and the dropping speed in the gravity field, determines the relations among the separating critical diameter, the rotate speed of screw, airflow speed and the radial size of separating interface, establishes and work out the separating diameter which value the separating effect of the new equipment
根據物料的空氣阻力與離心分離理論分析了離心力場中粒子徑向分離速度及重力場中的粒子沉降速度，確定分離臨界粒徑與螺旋轉速、氣流速度及分離界面徑向尺寸等之間的關系建立了並求出了衡量此種新機型氣固二相流分離效果的衡量指標? ?分離粒徑。 -
Fist ly, use mass equivalent method to predigest the original rotor system. secondly, use transfer matrix arithmetic to have finished the relative program to calculate the critical speed of flexible multi - tray rotor bearing system by matlab language. thirdly. finish program the unbalance response using riccati - transfer matrix arithmetic and finity buck arithmetic. fourthly, answer to the high vibration of uncontroled system when cross the critical speed, come out to adopt changing clearance damper bearing to control the viberation
本文對多柔盤轉子-支承系統的振動現象做了以下初步探索：用質量離散化方法把原轉子系統簡化；採用matlab語言編制了對傳遞矩陣法計算多柔盤轉子-支承系統的臨界轉速；用matlab語言對riccati傳遞矩陣法和有限元法編制了程序計算系統的不平衡響應；並針對其過臨界轉速時振動較大的現象，提出採用變間隙控制油膜剛度和阻尼，從而使原系統的在特定轉速（臨界轉速）的一段范圍內不平衡響應減小；並從被動控制與主動控制兩方面進行數值模擬，取的了較好的控制效果。 -
The related theory and critical technology of ladar, the imaging mode and ranging methods of imaging ladar have been discussed in detail in this dissertation. then a research project of high - speed 3d - imaging ladar using a laser diode has been proposed, and the primary and critical problems of the theory and technology of the project have been discussed. a ladar prototype has been manufactured successfully, with which lots of systematic experiments have been carried out
論文系統研究了激光雷達的相關理論和關鍵技術，詳細討論了成像激光雷達的測距體制和成像方式，在此基礎上提出了一種採用半導體激光器的高速三維成像激光雷達研究方案，全面分析了該方案的主要理論問題和關鍵技術問題，並成功研製出了實驗室樣機，利用樣機進行了大量的系統實驗。 -
The impact tests were carried out at the mid - span, and internal pressures of ompa, 5mpa, lompa and 15mpa were used in addition to the tests with water. the critical energy of perforation and the ballistic speed was measured, and the various types of rupture were identified from the section of the test specimens. force - time curves and internal pressure - time curves were obtained from experiment
實驗中記錄了沖擊力時程曲線和內壓時程曲線，測量了鋼管軸向和周向橫截面的變形，得到了不同工況下的破壞模態、臨界穿透能量以及彈道極限速度，並找到了臨界穿透能量隨內壓的變化規律。 -
Cfd calculation for resistance of a ship moving near the critical speed in shallow water
淺水中船舶水動力特性數值計算 -
Analyze the critical path of the critical module, find out the most important signal that causes the delay of this timing path, try to modify the structure and improve the speed of the unit
在md32的片上存儲系統設計中，進行了相應的低功氂設計考慮。由於md32採用了cache結構加片上ram組成面積較大的片上存儲系統，其功耗成為整塊晶元的最主要部分。 -
The results show that, when increasing the feed rate of the grinding wheel, decreasing the rotating speed of the wafer chuck table and using coarser grit grinding wheel, the material removal rate in the wafer rotating grinding increase, the feed rate of the grinding wheel has greater influence on the material removal rate ; when suitably increasing the rotating speed of the grinding wheel, decreasing the feed rate of the grinding wheel and using finer grit grinding wheel, the wafer surface roughness can be reduced ; there exists a critical rotating speed of the grinding wheel ( about 2300rpm ), beyond which the material removal rate evidently decreases and the spindle motor current and wafer surface roughness steeply increase ; when the grit size of the grinding wheel is finer than # 2000, the material removal rate decreases and the wafer surface roughness has no obvious improvement
研究結果表明，增大砂輪軸向進給速度和減小工件轉速，採用粗粒度砂輪有利於提高磨削矽片的材料去除率，砂輪軸向進給速度對材料去除率的影響最為顯著；適當增大砂輪轉速，減小砂輪軸向進給速度，採用細粒度砂輪可以減小磨削表面粗糙度；在其它條件一定的情況下，砂輪速度超過一定值會導致材料去除率減小，主軸電機電流急劇增大，表面粗糙度變差；採用比# 2000粒度更細的砂輪磨削時，材料去除率減小，矽片表面粗糙度沒有明顯改善。 -
The papers also brings forward the design parameters of the material critical suspending speed and the wind capacity according the theory of the air transportation, analyses and build up the condition of material diameter and airflow speed of the gas - solid current locating the separating interface
論文根據氣力輸送理論求出螺旋氣力吸取料裝置物料的懸浮速度及風機風量的設計參數，分析確定位於分離界面處的氣固二相流處于層流狀態即處于粘性磨擦阻力區的粒徑條件與氣流速度條件。 -
To reduce the excessive vibration of a high - speed rotor system at the critical speed, a friction damper with a flexible support structure is introduced
摘要為了抑制高速滾動軸承轉子系統在通過臨界轉速時的過大振動，本文採用了摩擦阻尼彈性支承結構。 -
In addition, several way are adopted to optimize the one dimensional transform architecture. improving the architecture resulting from the standard lifting scheme reduces the critical path delay ; an embedded boundary extension algorithm is adopted instead of the standard symmetric extension and it ’ s easier to implement ; the pipeline technique is adopted to increase the speed of processing ; coefficients of the multipliers are transformed into csd forms and the multiplications are substitute by minimum shift - add operations
改進了由標準的提升演算法得到的變換結構，減小了關鍵路徑上的延時;採用內嵌的邊界延拓來代替標準的對稱延拓，實現更加簡單;採用流水線技術顯著提高了處理的速度;把乘法器系數表示為csd形式，將常系數乘法優化為最少的移位加操作。 -
The kinematics analysis of the moving system of lunar rover is presented in this paper. in this procedure, the lengthways speed of each wheel, when the lunar rover is moving in common status, are calculated. moreover, the same direction and converse difference steering for difference steering system with steering radius as the critical transfer condition is put forward
本文首先對六輪獨立驅動式月球車所採用的行走系統進行了運動學分析，推導了月球車正常行駛狀態下各車輪的縱向速度，並給出以轉向半徑為臨界值的差速轉向系統的正、反向差速的轉換條件。 -
Based on productional level and capability demand of hybrid electrical vehicles in our country, this paper designed a flywheel through analyseing and calculateing of different composite materials and shapes. through a finite element analysis method, the limiting rotational speed of composite flywheel was calculated and critical rotational speed was analyzed
本文根據混合動力客車對飛輪電池中飛輪的性能要求以及國內的生產實際水平，在對多種不同復合材料組合和不同結構形狀的飛輪進行計算分析的基礎上，得到一種飛輪設計，並計算了它的極限轉速和臨界轉速。 -
Using this kind of bearing, we finish the spin test at 67000rpm. also, we add the controlled passive magnetic damper ( cpmd ) to the rotor tester, which is used to reduce the vibration the main achievements are as follows : 1. we analyzed dynamic characteristic of nr15 rotor with long shaft, and get its critical - speed and response to unbalanced mass
本課題的研究，我們做了以下工作： 1對nr15帶柄轉子的動力學特性做了分析，得到了不同剛度支承下，轉子各階臨界轉速及相應振幅參數；並在原有超速試驗臺基礎上，通過設計上、下彈性阻尼支承結構，實現了nr15帶柄轉子67000rpm的超速試驗。 -
The numerical simulations agree well with the wind the tunnel experiments, and the critical speed is increased by 13. 4 %. chapter 5 presents the robust flutter suppression of the airfoil
數值模擬和風洞實驗表明，這兩種控制器是有效的，可將系統的顫振臨界速度提高23 . 4 % 。 -
Because of these characteristics, the variable stiffness sma bearing used in rotor system can be designed, and then the stiffness of system can be varied by active control technology when the rotate speed of system is near the critical rotate speed to reduce the maximum vibration amplitude of rotor system
利用這些特性可以設計出用於轉子系統的可變剛度支承，通過結合主動控制技術，在臨界轉速附近改變系統剛度，從而降低系統在臨界轉速時的最大振幅。本文研究利用形狀記憶合金對轉子系統振動進行主動控制。 -
Calculation of the critical speed of a piston engine
同軸抗性消聲器聲學和阻力特性的數值計算與分析 -
Critical speed of drive shaft
傳動軸的臨界轉速
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