critical speed 中文意思是什麼

critical speed 解釋
臨界區域
  • critical : adj 1 批判的,批評的;(在某方面)有鑒定力的 (in)。2 吹毛求疵的;愛挑剔別人的 (of about)。3 ...
  • speed : n 1 快,迅速。2 速率,速度。3 (汽車的)變速器,排擋。4 (膠片,照相紙)感光速度。5 〈古語〉興隆...
  1. Using a 9 - speed chain with 8 - speed front derailleur and crankset will result in sluggish shifting and the adjustment is more critical

    使用9速鏈條搭配8速前撥及牙盤會導致遲緩的變速並使調整過程更加困難。
  2. Rotor dynamic devise is the vital ache on rotating mechanism design. and prefiguring critical speed. calculating unbalance response is the central content

    轉子動力學設計是旋轉機械設計中的重要環節,而預計臨界轉速、計算不平衡響應又是其主要內容。
  3. This dissertation is chiefly act below work : ( 1 ) expatiating the equipments diagnosis technique development process and trend, putting forward the standpoint that giving systematical diagnosis to the mechanical and electrical equipment and expanding the technical application in equipment diagnosis, making it breakthrough the traditional application of maintaining etc. in equipments, still be used for improvement and development etc. s of new product ' s design ; ( 2 ) probing into vibration type and disposal method of vibration signal, the usual method of equipment condition recognition, the essential constitutes and development trend of observation and diagnosis system ; ( 3 ) introducing the development trend of domestic and international crusher and the distinguishing feature of double turnplate stike crusher which is a new product. according to the breakdown phenomenon in running process, establishing the fault tree and deducing every kind of foundation affairs resulting in fault ; ( 4 ) studying the calculation method of critical rotation speed

    本文主要做了以下工作: ( 1 )闡述了設備診斷技術的發展過程及發展趨勢,提出了應結合實際對機電設備進行系統診斷的新的技術思路,用實踐證明了應當拓寬設備診斷技術應用的范圍,使設備診斷技術既可以在設備管理和設備維修中得到應用,也可以用於新產品的設計改進及開發等; ( 2 )探討了振動的類型及振動信號的處理方法,設備狀態識別常用的方法,監測與診斷系統的基本構成與發展趨勢; ( 3 )介紹了國內外破碎機的發展趨勢,以及雙轉盤沖擊破碎機這一新產品的結構和特點,並根據試機過程中出現的故障,建立了故障樹,並導出了導致故障發生的各種基礎事件; ( 4 )研究了臨界轉速的計算方法和原理,用傳遞矩陣法計算出了破碎機內轉盤的臨界轉速。
  4. 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。
  5. Speedy calculation of critical speed of vacuum pump

    真空泵臨界轉速的快速計算
  6. 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。
  7. 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
  8. 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。
  9. 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。
  10. 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 % 。
  11. Thereupon, the idea of coupled wheelsets is brought forward that the left and right wheels of wheelsets are coupled properly to produce a few lognitudinal creep forces. in this way, coupled wheelsets have both self - steering capability and higher critical speed. some researches about coup led wheelsets have been carried through abroad, however research about coupled wheelsets is basically a blank in homeland

    鑒於此,國外一些專家學者又提出了耦合輪對的設想,即輪對的左右車輪通過某種形式進行適當的耦合,這樣便可產生適量的縱向蠕滑力,從而使輪對既具有導向功能,又能保證車輛具有較高的臨界速度。
  12. When the rotating speed passed through the critical speed, the effect of the unbalance response of the system duo to the misalignment was remarkable, and at the others its influence was not large

    當轉子系統在臨界轉速附近時,轉子的不對中對系統的不平衡響應影響顯著,而在其它轉速處,這種影響較小。
  13. In the second part, the transfer matrix method to calculate the critical speed, the mode and the unbalanced response, is presented. and the torsional vibration and lateral - torsional coupling vibration problem is discussed briefly

    第二章總結了計算轉子系統臨界轉速、振動模態和不平衡響應的傳遞矩陣法,並簡要討論了轉子系統的扭轉振動和彎扭耦合振動問題。
  14. The theory of fuzzy reliability design is applied to study the anti - vibration design of the driving shaft of swing movable teeth reducer. the randomness of working frequency and the fuzziness of the critical speed bonder are discussed. the corresponding formulae of calculating the fuzzy reliability are presented

    將模糊可靠性設計理論引入擺動活齒減速器輸入軸的抗共振設計中,分析了擺動活齒減速器工作頻率的隨機性和共振區邊界取值的模糊性,並給出了相應的模糊可靠度計算公式。
  15. Dynamics of pedestal looseness rotor system near the critical speed region

    支承松動故障轉子系統共振區動態特性分析
  16. 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
  17. Critical speed of drive shaft

    傳動軸的臨界轉速
  18. Flexural critical speed

    撓曲臨界轉速
  19. Rotor critical speed

    轉子臨界轉速
  20. The vibration caused by unbalance of the rotor system is especially strong at critical speed. the methods of reducing the vibration are interested by many - researches

    旋轉機械的不平衡量引起的振動,在過臨界轉速時最為強烈,對轉子系統的影響較大。
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