flutter vi. 1.拍翅振翼;(旗帜)飘扬。 2.颤动,(心)急跳,(脉搏)浮动。 3.(心绪)不宁,坐立不安。 4.〔口语〕对人进行测谎。 He fluttered about the room nervously. 他心绪不宁地在房间里徘回。 vt. 1.振(翼);拍(翅)。 2.扰乱;使不安。 n. 1.振翼;飘扬。 2.不安,焦急,波动。 3.(身体部分的)病态阵跳。 4.〔英俚〕投机,小赌。 5.颤振。 6.图像跳动,脉冲干扰,放音失真。 7.对…进行测谎。 the flutter of wings 翅膀的拍动。 all in a flutter 心慌意乱。 cause [make] a great flutter 轰动一时。 fall into a flutter 心慌意乱。 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.
characteristic adj. 有特性的;表示…特性的,…特有的。 Japan's characteristic art 日本特有的艺术。 n. 特性,特征,性能,特色。 be characteristic of …所独有的特征,有…的特色。 characteristic of logarithm 对数的首数。 adv. -cally
On comparing flutter characteristics of three supercritical airfoils in transonic flow 超临界翼型的跨声速颤振特性研究
The nonlinear panel flutter equations are also solved in time domain . the limit cycle flutter characteristics of nonlinear panel flutter are investigated and the effect of temperature and airflow speed on the nonlinear panel flutter characteristics is studied 通过对非线性壁板颤振方程的时域求解,研究了壁板的极限环颤振特性,得到了温度、气流速度等因素对非线性壁板颤振特性的影响规律。
Accurate calculation of aircraft steady and unsteady aerodynamics and flutter characteristics , especially in the transonic speed range is a crucial problem for aircraft designers . it is very important for us to develop an efficient , accurate , robust navier - stokes / euler flow solver that could be used to study transonic steady and unsteady flowfields 飞行器的定常和非定常气动力的准确数值求解及颤振特性研究,特别是跨音速范围内的准确数值求解及研究,一直以来都是飞行器设计工作者必须面对的重要研究难题。
At first , the finite element formulation is presented to determine the flutter characteristics of laminated panels at elevated temperature . then both the linear and nonlinear panel flutter characteristics are analyzed . the panel flutter boundaries are finally determined and the effect of temperature , airflow speed , etc , on the panel flutter characteristics is analyzed 为此,本文首先建立了复合材料壁板热颤振的有限元模型并对受热壁板的线性和非线性颤振特性进行了研究;最后确定了壁板的颤振边界,分析了温度、来流速度等因素对壁板颤振特性的影响规律。