stalling flutter中文什么意思

stall: n. 〔美俚〕 1.口實，借口；拖延，搪塞，敷衍；欺騙辦 ...
flutter: vi. 1.拍翅振翼；(旗幟)飄揚。 2.顫動，(心)急 ...
stalling: 失速；停止；卡住; 施塔林; 斯托林; 停轉(zhuǎn); 熄火
flutter: vi. 1.拍翅振翼；(旗幟)飄揚。 2.顫動，(心)急跳，(脈搏)浮動。 3.(心緒)不寧，坐立不安。 4.〔口語〕對人進行測謊。 He fluttered about the room nervously. 他心緒不寧地在房間里徘回。 vt. 1.振(翼)；拍(翅)。 2.擾亂；使不安。 n. 1.振翼；飄揚。 2.不安，焦急，波動。 3.(身體部分的)病態(tài)陣跳。 4.〔英俚〕投機，小賭。 5.顫振。 6.圖像跳動，脈沖干擾，放音失真。 7.對…進行測謊。 the flutter of wings 翅膀的拍動。 all in a flutter 心慌意亂。 cause [make] a great flutter 轟動一時。 fall into a flutter 心慌意亂。 in a flutter 心里卜卜跳。 put sb. in [into] a flutter ＝ throw sb. into a flutter 使忐忑不安。 n. -er ,-ingly adv.
in a flutter: 心情煩躁

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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(guī)律可以清楚地解釋失速顫振的各種非線性現(xiàn)象。
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(jié)論：在靜態(tài)失速攻角附近的一定來流速度范圍內(nèi)，分離渦會發(fā)生頻率鎖定現(xiàn)象，分離流的頻率與固有頻率趨于相同，這時的振動呈現(xiàn)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。

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