Discussion on aeroelasticity of large aspect - ratio wing 基于結構優(yōu)化的大展弦比機翼質量估算
Design method of active control law based on reduced order model of unsteady aerodynamics for aeroelasticity 基于非定常氣動力低階模型的氣動彈性主動控制律設計
Using above methods to solve unsteady pressure distribution , coupling structure equations , the supersonic or hypersonic aeroelasticity is simulated in time - domain 運用上述的非定常氣動力求解方法,耦合結構動力學方程,實現(xiàn)超音速、高超音速氣動彈性的模擬。
Basing on the static aeroelasticity , the jig - shape and the attack angle design have been studied . generally , much computing time is needed in unsteady flow computation 利用現(xiàn)有條件自主開發(fā)出適合定常、非定常流場計算和氣動彈性研究的分布式并行計算機系統(tǒng)。
At present , the equivalent plate methodology based on global ritz solution technique has been used in the studies of aeroelasticity and aeroelastic optimization of composite wing structures , but it stiff exits space to develop 鑒于此,常常采用連續(xù)的等效板模型( equivalentplatemodel ,簡稱epm ) 。目前,基于全局ritz求解技術的復合材料翼面結構等效板方法已用于氣動彈性的基本研究和優(yōu)化設計,但還不夠成熟。
This paper , on the basis of the theory of aeroelasticity , analysed the galloping phenomenon which the cord was undergone the excitation of the horizontal wind . and also built up the mechanic model when galloping . this model provided the theoretical foundation for the case that the cord begins violently vibrating just after the speed of the horizontal wind reaches a certain level 以氣動彈性力學理論為基礎,分析了懸索在受到水平方向橫風激勵時的馳振現(xiàn)象,并建立了其發(fā)生馳振時的力學模型,該模型為懸索在橫風速度達到一定數(shù)值時發(fā)生激烈的振動提供了理論依據(jù)。
Then the steady and unsteady subsonic , transonic and supersonic viscous flows around airfoil and some aircraft are numerically simulated . the 3 - dimensional unsteady navier - stokes equations are solved using the implicit lu - nnd algorithm , with baldwin - lomax turbulent model . on the basis of simulating unsteady viscous flow , coupling the structure dynamics equations , the problems of static aeroelasticity and flutter are investigated for wings and elevator 在模擬非定常粘性繞流的基礎上,與顫振運動方程相耦合,分別對機翼和全機流固耦合現(xiàn)象中顫振問題進行了研究,準確求解跨音速顫振臨界速度,分析機翼和全機的從亞音速到超音速范圍的顫振規(guī)律,并研究分析了機翼飛行迎角變化對顫振速度的影響。
In order to reduce the computing time and improve efficiency , the procedure has been paralleled and the distributed parallel computation is accomplished in a net with four pcs . the parallel computation of static aeroelasticity and flutter has been initiated at home . on this basis , the work includes four parts 通過對單機串行程序進行分布式并行化改造,在國內首次實現(xiàn)了基于微機網(wǎng)絡上的靜氣動彈性和顫振分布式并行計算,解決了數(shù)值求解氣動彈性問題難以避免的耗時巨大的問題。
Using the engineering methods of supersonic and hypersonic flow or local piston theory developed in this paper to compute unsteady aerodynamic loads , and coupling structural equations , the supersonic or hypersonic aeroelasticity with a typical servo system under thermal environment is simulated in time - domain 運用超音速、高超音速氣動力工程計算方法和本文發(fā)展的當?shù)亓骰钊碚撚嬎惴嵌ǔ鈩恿Γ詈辖Y構運動方程,實現(xiàn)了熱環(huán)境中帶有伺服機構的氣動彈性的時域仿真。
百科解釋
Aeroelasticity is the science which studies the interactions among inertial, elastic, and aerodynamic forces. It was defined by Arthur Roderick Collar in 1947 as "the study of the mutual interaction that takes place within the triangle of the inertial, elastic, and aerodynamic forces acting on structural members exposed to an airstream, and the influence of this study on design.