顫振速率 的英文怎麼說
中文拼音 [zhànzhènsùlǜ]
顫振速率
英文
flutter speed-
To a series of dampings, velocities and frequencies, the linear interpolation is applied and the flutter speed and flutter frequency are obtained
對得到的一系列的阻尼、速度和頻率進行了線性插值，從而得到顫振速度和顫振頻率。Firstly, the airfoil ' s classic flutter ( at small attack angle ), stall flutter ( near the static stall angle ) and response ( at large attack angle ) are analyzed. it is found from the numerical results that " lock - in " will occur at certain freestream velocity range near the static stall angle, where the frequency of the vortex will be equal to the natural frequency and the flutter has the characteristic of self - induced oscillation. when the attack angle is far from the static stall angle, the vortex will have its own frequency, which differs from the natural frequency, and the flutter has the characteristic of forced oscillation
首先研究了二維翼型的古典顫振（小攻角） 、失速顫振（失速攻角）和動力響應問題（大攻角） ，得到以下結論：在靜態失速攻角附近的一定來流速度范圍內，分離渦會發生頻率鎖定現象，分離流的頻率與固有頻率趨于相同，這時的振動呈現自激振動的特點；遠離失速攻角時分離流頻率則擺脫固有頻率的影響，此時的振動具有強迫振動的特點。The characteristic of " lock - in " can be used to explain all kinds of nonlinear phenomenon of the stall flutter
這種頻率鎖定規律可以清楚地解釋失速顫振的各種非線性現象。To tackle this problem, a novel methodology is proposed to suppress the vibration of the spindle by means of chatter frequency identification and on - line regulation of spindle speed
為此，本文採用辨識顫振頻率和主軸轉速在線調節的方法，與磁軸承控制相結合抑制主軸振動，取得良好效果。分享友人