顫振導數 的英文怎麼說
中文拼音 [zhànzhèndǎoshǔ]
顫振導數
英文
flutter derivative-
Simulations for identification of flutter derivatives of bridge section using the coupled - forced - vibration method
橋梁顫振導數的耦合強迫振動模擬識別A comparative study between time - domain method and frequency - domain method for identification of bridge flutter derivatives
橋梁顫振導數識別的時域法與頻域法對比研究The researcher also concludes that in the range of reduced velocity, the flutter derivatives equal to the function of it
在折減風速的實用范圍之內，顫振導數只是折減風速的函數。The identification of flutter derivatives for bridge sectional model has long been a key issue in long - span bridge flutter and buffeting analysis
長期以來，橋梁斷面顫振導數的識別都是大跨度橋梁顫抖振響應分析中的重點和難點問題。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。While the flutter self - excited loads of a bluff section has a quality of obvious nonlinearity. and the application of flutter derivatives to self - excited loads of the bluff section is close to a linear relationship. 5
而鈍體斷面的顫振自激力高次諧波分量較大，具有較明顯的非線性響應特徵，驗證了用顫振導數表示鈍體的自激力只是一種線性近似。A test has been carried out on three typical bridges sectional models of flutter derivatives to find the general rules with the change of flutter derivatives of the bridges sectional model. and it has been discovered that this change depend on the torsional damping, an element closely relating to the h * 2 and a * 2 4
通過對三種典型斷面顫振導數的測試，考查了各顫振導數隨斷面形狀的變化趨勢，說明了最主要的變化體現在與扭轉阻尼有關的h _ 2和a _ 2項。As to the current problems existing in the identification for these flutter derivatives, the dissertation tries to trace the development in the identification for the past unsteady aerodynamic forces of long - span bridges. it also investigates the method for flutter and buffeting analysis and the flutter derivatives. based on the present methods used in obtaining the unsteady aerodynamic forces and flutter derivatives, and co - funded by a natural scientific fund from the nation and a key project fund from the railway ministry, the current research has attempted to develop a device which can be employed in the wind tunnel to test flutter derivative through a forced vibration method
鑒于目前橋梁斷面顫振導數識別的水平和存在的問題，本文通過對大跨度橋梁非定常氣動力、顫振分析方法及顫振導數識別方法的回顧和評述，基於現有的非定常氣動力和顫振導數的測試方法，在國家自然科學基金與鐵道部重點學科基金的聯合資助下，研究開發了一套在風洞中採用強迫振動法測試顫振導數的裝置。As the first successful experiment which has been conducted in china to test the unsteady aerodynamic forces in wind tunnel, the feasibility of the method is proved through numerous tests and abundant practice
首次在國內成功實現了在風洞中測試橋梁節段模型顫振導數的強迫振動法，並通過大量的試驗驗證了本測試裝置的可靠性。Numerical results are in good agreement with some data and the method and procedure presented in this paper are verified. and then the wing ? flutter characters of a missile wing are numerical simulated with the examples of a missile wing
以某導彈翼面為算例，對彈翼的亞、跨、超音速的顫振臨界速度進行了數值計算，部分計算結果與風洞計算結果相比較，一致性很好。Static coefficients are defined to describe the static effect of wind on bridge, and the aerodynamic derivatives are used to describe the aerodynamic effect
靜力三分力系數用於描述風對橋梁的靜力作用，氣動導數是顫振和抖振分析方法的核心。分享友人