頻率顫動 的英文怎麼說
中文拼音 [bīnlǜzhàndòng]
頻率顫動
英文
flutter-
2. a systematic test has been carried out to observe how the model actuating frequencies and amplitudes affect the flutter derivatives, and the effect is found to be quite minor
通過系列試驗考查了模型驅動頻率和振幅對顫振導數的影響，驗證了驅動頻率和振幅對顫振導數影響很小。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。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。Broad band random vibration
寬帶信號頻率隨機顫動In the buckling question under nonconservation force, a simply example ( the dynamic stability question under the uniformly follower forces with small deformation % linear elastic, straight normal. ) is considered. the variational equation of braid composite cylindrical shells subjectd to uniformly follower forces is deduced based on the variation principle of quasinatural frequency of elastic nonconservative system self - excited vibration. the calculated formulas of the flutter load and quasinatural frequency of shells are obtained. the program for calculating the flutter load is developed. the numerical example is given and some useful conclusions are obtained
對非保守力作用下的屈曲問題，具體研究了圓柱殼在比較簡單的情況，即小變形、線彈性、直法線假設下在隨動力作用下的殼屈曲問題，由擬固有頻率變分原理推出了圓柱殼受隨從力作用的變分方程，得到了顫振載荷與殼彎曲的固有頻率的計算公式，編制了相應的計算機程序，並給出了具體算例，得到了一些有益的結論。The center is a magical place, and upon passing through its gates, i felt a tingling sensation as my energy rose and vibrated at a very high level
西湖道場真是一處神奇的地方，我一走進大門，立即感受到自己的能量提升，振動頻率變得非常高，幾乎讓我有震顫的感覺。The flows in the case of different reduced frequencies are computed respectively for two blade profiles. by comparing the time curves of relative parameters in oscillating cascades and the flow field contours under different conditions, it is indicated that the reduced frequency is an important factor to determine whether the blade flutter happens or not
針對兩種葉型分別計算了不同摺合頻率下的流場，通過比較振動葉柵相關參數隨時間變化的曲線及流場雲圖，表明摺合頻率是決定葉片顫振與否的重要因素。All holter demonstrated normal pacemeker function. conclusions no significant difference between activity - based or respirtator - based and dual sensor ventricular rate adaptive pacing in clinical effects
對於心動過緩合併房顫患者，建議採用單腔單感知頻率應答起搏器已能達到目的。分享友人