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moment coefficient 【機械工程】矩系數。

momental

( 2 ) the results reveal that the pre - swirl ratio has a great influence on the flow field of the rotating disk , even greater than the rotational reynolds number , and an initial constant is induced in moment coefficient cm and average nusselt number nuave correlations , which does not exist in the case of without pre - swirl ( 2 )分析了預旋系數_ r對該旋轉盤腔流場的影響,定義了一個新的壓力系數c _ p ,該壓力系數c _ p沿徑向位置的變化對特定的旋轉雷諾數re _是一個常數。

The aerodynamic characteristics of a projectile with wrap around fins are studied systematically in this paper , as follows : 1 . the lift coefficients 、 drag force coefficients 、 pitch moment coefficients 、 pitch damping moment derivatives and roll damping moment derivatives are obtained from engineering calculation through looking wrap around fins as flat fins of the same projection aera 本文對某卷弧尾翼彈氣動特性進行了系統研究,主要內容與結論為: 1 .將卷弧翼按照相同投影面積的平板翼進行工程估算,得到升力系數、阻力系數、俯仰力矩系數、俯仰阻尼導數、滾轉阻尼導數曲線。

In light of the elastic thin plate theory , the author induced equilibrium differential equation of bi - direction cellular slab , which was proved correct through analysis and comparison to result of ansys to with theoretical calculation . through the deflection and bending moment coefficient calculation of bi - direction cellular slab under various boundary conditions , the author brought forward the theory that the deflection of mid - span and bending moment coefficient calculation of mid - span and support of bi - direction cellular slab could be in accordance with solid plates “ , which could satisfy the precision of engineering 本文根據彈性薄板理論,導出了雙向空腹板的平衡微分方程,并通過理論計算和通用有限元程序ansys結果對比,驗證了其正確性;通過對各類邊界條件下雙向空腹板撓度和彎矩系數的計算比較,本文提出:雙向空腹板跨中撓度及跨中、支座彎矩可使用本文空腹板剛度公式查找現有的實心板撓度彎矩系數表進行計算,完全能滿足工程精度要求。

This paper adopts linear interpolation to deal with data of wind tunnel experiment for sample uav and realizes modeling and simulation of the sample uav with c language in common aerodynamics and moment coefficient 本文采用線性插值處理樣例無人機風洞試驗數據,采用正常情況下的氣動力及力矩系數數學模型,并用c語言實現樣例無人機建模與仿真。

With the increase of the relative velocity , the variations of side force coefficient and yawing moment coefficient of the overtaken vehicle will increase linearly 被超車側向力系數和橫擺力矩系數的變化量隨兩車相對車速的增加呈線性增加的趨勢。

Finally radial basis function ( rbf ) is adopted to identify the moment coefficient 最后還采用徑向基函數神經網絡識別了力矩系數。

The in - plane stability and in - plane equivalent moment coefficient of tapered column 多個彈性支承上軸心受壓桿件的彈性穩定

Rolling moment coefficient 滾動力矩系數

Heeling moment coefficient 傾側力矩系數

Pitching moment coefficient 俯仰力矩系數