無量綱變量 的英文怎麼說

中文拼音 [liánggāngbiànliáng]
無量綱變量 英文
dimensionless variable
  • : 無Ⅰ動詞(沒有) not have; there is not; be without Ⅱ名詞1 (沒有) nothing; nil 2 (姓氏) a surn...
  • : 量動1. (度量) measure 2. (估量) estimate; size up
  • : Ⅰ名詞1 (提網的總繩 多用於比喻) the headrope of a fishing net 2 (比喻事物最主要的部分) key lin...
  • 無量 : measureless; immeasurable; boundless
  1. The existed material fatigue performance test curves are dealt with and analyzed, and the non - dimensional stress - strain curve, tangent modulus factor curve and fatigue life curve are drawn based on the experiment data, and these three non - dimensional parameter curves are used to find the inherent rules that the test curves can be replaced each other to some extent. it can be concluded that if the common character and system error of these materials are found, the test curve of a certain material can be used for reference by another material. this is a simple approach about fatigue life estimate and is engineering practical

    對已有的材料力學疲勞性能試驗曲線進行分析整理,利用試驗數據繪制了相對應力應曲線、切線模因子曲線和疲勞壽命曲線,利用這三種參數曲線發現了其中存在的規律性,即在某種程度上實驗曲線可以互相取代,並用試驗數據對此進行了討論,並由此推斷,如果找出材料彼此的共性或彼此之間的系統誤差就可以將一種材料的試驗曲線供其它材料參考使用,這是一種估算材料的疲勞壽命的簡便方法,對工程而言具有實用性。
  2. This formula used inverse regression and data fusion technical and maximum likelihood theory, then this method enabled random sample value obtained in ultrasonic and rebound method of different detection population to mix together effectively, and reach estimation of concrete strength

    該公式利用逆回歸理論、數據融合技術和最大似然原理,將回彈值和聲速值分別看作被解釋,將來自超聲法和回彈法不同的檢測數據進行有效融合,得出混凝土強度的推定值,該推定結果具有偏性和方差最小性質。
  3. In chapter 2, an accurate modified reynolds equation is derived. the modified reynolds equation is solved numerically with the finite different method, the generated axial thrust force, minimal mucus film thickness, load capacity of hydrodynamic pressure and circumferential friction under the rectangular screw are obtained. at last, using numeral methods and coordinate graphs, the influences of rectangular screw parameters on the generated axial thrust force, minimal mucus film thickness, load capacity of hydrodynamic pressure and circumferential friction are studied and analyzed

    第二章,首先推導了非牛頓流體的形雷諾方程,化簡了雷諾方程,得出了矩形螺紋下有限差分方程;還推出了矩形螺紋作用下軸向摩擦牽引力、粘液膜厚度、粘液膜承載能力、周向摩擦阻力表達式,最後用數值計算方法求解,通過坐標圖分析了矩形螺紋參數對軸向摩擦牽引力、最小粘液膜厚度、粘液膜承載能力、周向摩擦阻力的影響。
  4. When in experiment, the air was heated by the film heater installed on the above and below surface of channel, adopting various air velocity of flow, test import ' s and export ' s temperature, wall temperature, fluid flux and the drop of pressure, and the other parameter. adopting nu and nu0 to analyze the baffle ' s situation of heat transfer and fluid flow, which baffle was holed various diameters

    實驗時,通過矩形通道上下壁面敷設的電加熱膜加熱通道空氣,改空氣流速,測試不同工況時的進出口溫度、壁面溫度、流體流和壓力損失等參數,並採用努謝爾特準則數nu 、 nu _ 0等分析了設置不同開孔折流板的換熱與流動情況。
  5. The results show that there exists such nonlinear dynamical phenomena as chaos ang quasi - period movement when the rotational speed, mass eccentric and a synthesizing parameter of the system change. from different point of view, the chaotical phenomenen induced by double period bifurcation is found. in this paper, the dynamical model of bearing - elastical rotor with a cross - section of crack is estabilished

    結果表明,在這一非穩態油膜力模型下,在轉速、偏心及一包含諸多因素的綜合參數的化過程中,在很大的范圍內,系統運動都會出現由不斷倍周期分岔導致的混沌現象和概周期運動。
  6. By using the solution developed and the frequency - dependent stiffness coefficient and damp coefficient, the dynamic behavior, especially the one concerned with the variation of the dimensionless maximum response along the depth, for the pile with finite length or with infinite length was studied. it was shown that to simplify computation a pile of finite length can be taken as the one of infinite length if the ratio of pile length to its diameter ( i. e. lid ) is greater than 15

    利用所得解,採用與頻率相關的剛度系數和阻尼系數的近似表達式,對有限長樁和限長樁的動力特性特別是對最大響應沿深度的化曲線進行了參數研究,表明在常見樁土參數下,當長徑比大於15時,可將有限長樁視為限長樁以簡化計算。
  7. Temperature process lines with tidal cycles of multi engineering conditions of characteristic sections are obtained, the relationship between temperature distribution and velocity field is established, the inner mechanism change of temperature process lines is investigated, the interrelation between water intake and outlet is analyzed, the relation between the ratio of dimensionless temperature rise span of the plant intake and the ratio of river discharge volume and plant cooling water intake volume is obtained

    得到了特徵斷面多種工況隨潮周期化的溫度過程線,建立了溫度場與流速場的相關關系,研究了溫度過程線的化機理,分析了取排水口對溫度場的相互影響關系,探討了溫升時長比與來取流比的相關關系。
  8. When impact applies on a discrete system in which one of constraints is a constant with coulomb friction, the phenomenon of slip - stick at the point can cause the change of friction and the integration for frictional force during infinitesimal impulsive interval becomes impossible according to traditional impulsive dynamics of discrete systems. by introducing a new dimensional time parameter, first - order momentum - impulse differential equations are obtained and the discussion over infinitesimal impulsive interval is transformed into a piece - wise study on the finite region of impulse

    在引入新的的時間參數后,通過建立相應的動-沖的一階微分方程,在趨近於零的沖擊區間的討論為在有限區間中來分段研究含滑動-黏滯的沖擊過程,得到了受到多點打擊的離散系統考慮庫侖摩擦時的動力學的求解方法,即根據沖擊前的初始狀態需回到繁瑣的微分方程的求解便可以得到沖擊后系統的動力學響應。
  9. The physical and mathematical models are founded. numerical simulation of marangoni convection in the liquid bridge and gas channel was performed by employing the primitive variable method and using galerkin finite element method, which is applied for discretization of non - dimensional governing equations and boundary conditions. the relationship between the suppressing status of mc in the liquid bridge and the inlet gas velocity or the channel width is obtained, and the suppressing status of some kinds of marangoni numbers ( ma ) or size ratios of liquid bridge a is analyzed

    採用原始法,用galerkin有限單元法對控制方程及邊界條件進行離散后,數值模擬了微重力條件下半浮區硅熔體及氣體流道內的marangoni對流,得出了氣流沖刷速度及流道寬度化和熔體內熱毛細對流抑製程度的關系,進而分析了不同的參數ma數和不同熔體幾何尺寸比a下熱毛細對流抑制情況。
  10. The problem is then fed to a nonlinear programming routine to solve for all parameters. the flight dynamics model with yawing motion of uh - 60a is given, scale factors of state variables and control variables are applied based on the consideration of algorithm convergence. then, the optimization of trajectories is expressed as optimal control problem with a performance index constrained by helicopter performance limits, faa regulation and so on

    首先,建立帶偏航運動的直升機點質模型,然後對狀態和控制進行處理,因為狀態和控制值相差較大,這使得優化演算法收斂效果差,所以需要選擇適當的縮放因子,最後把直升機單臺發動機停車后的飛行軌跡表示成一個最優控制問題,即在考慮直升機性能限制和far規范后,指定一個優化性能指標,選擇合適的路徑約束,然後再解最優控制問題。
  11. A simplification in the foundation of actual dynamics model and the differential equation of aircraft movement are put forward, we have non - dimensionalized the equations. an optimal guidance model for orbit transfers is accomplished by the optimal control theory

    本文圍繞平面情況下飛行器最佳軌路徑這一主題,在實際力學模型基礎上進行簡化,建立飛行器運動微分方程,並加以化處理。
  12. Natural unit, dimensionless transformation, reducing and regaining constant of physical equation

    換及常數的壓縮與恢復
  13. 3 ) a custom filed function module was complied to study the influence of non - dimensional mass flowrate changed with time in stair shape on flow and heat transfer inside rotator - stator cavity with axial inflow and radial outflow. average nusselt number takes on a sharp up - down process when the mass flowrate changes from stabile status as to the following change of flowrate, the average nuselt number changes greatly in the initial stage and then changes gradually

    ( 3 )自編用戶程序模塊,研究在軸向入流、徑向出流的轉-靜盤腔中,隨時間呈階梯型改對盤腔流動和換熱的影響。當流從某個穩定狀態改時,轉盤上的平均努謝爾數會產生一個明顯的上升再降低過程;在每一次流的初始階段,平均努謝爾數存在一個較大幅度的化。
  14. In the test, the d / w has three values : 0. 2 0. 13 and 0. 7, we used the ratio of nu to nu0 to analyze the characteristics of the channel ' s heat transfer, used the ratio of f to f0 to analyze the characteristics of the channel ' s flow resistance. through the efficiency ( the was defined the ratio of nu / nu0to f / fo ) we measure the influences of different infinitude date on the channel ' s heat transfer, we found the results of the heat transfer : no 3 baffle is the best, no 5 baffle is better than model 8

    在實驗選取d w的三個值0 . 2 、 0 . 13和0 . 7中,運用準則數nu nu _ 0隨re的化曲線分析了通道強化換熱特性;運用f f _ 0隨re的化曲線分析了通道的阻力特性;通過綜合開孔換熱效率衡不同因次對通道的綜合強化換熱影響。
  15. The relationship between the non - dimensional drag coefficient of sma plate face and time is presented, and the pressure distribution on and around the sma plate surface as well as the karman vortex configuration in the wake at a certain time are given

    給出了形狀記憶合金薄板表面的流體阻力系數隨時間的化關系,同時給出了某一時刻薄板表面及其周邊的壓力分佈和薄板尾跡中的卡門渦街形態。
  16. The problem is described for the determination of optimal spacecraft trajectories in an inverse - square field using low - thrust in this paper. the differential equation of aircraft is obtained by simplification of atmospheric model, then we do non - dimensionalized the equations

    本文主要討論了在反平方場中採用小推力下飛行器的最優軌問題,通過對大氣模型的簡化,建立了飛行器的運動微分方程,然後加以化。
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