顫振力 的英文怎麼說

中文拼音 [zhànzhènlì]
顫振力 英文
flutter force
  • 顫 : 顫動詞（發抖） shiver; shudder; tremble
  • 振 : 動詞1. （搖動; 揮動） shake; flap; wield 2. （奮起） brace up; rise with force and spirit
  • 力 : Ⅰ名1 （力量; 能力） power; strength; ability; capacity 2 [物理學] （改變物體運動狀態的作用） forc...
  1. The numerical flutter analysis system was formed by the three - dimensional numerical simulation of the vibrating cascade flow combined with the structural dynamics analysis of vibrating blade

    將振動葉柵三維流動數值模擬與振動葉片結構動力學分析相結合，建立了葉片顫振數值分析系統。
  2. 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。
  3. 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。
  4. 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。
  5. Operation : the performer puts both top of the thumb on “ shen shu ” point with strength forward to inner part about three times, and then rubbing hands each other to warm both “ shen shu ” and “ qi hai shu ” points and shaking hands quickly with time longer

    操作：施術者用兩手拇指指端放在雙側腎俞穴，略上向斜點並同時著力向內合，約三次后，再將雙手搓熱后，迅速放在兩腎俞處，氣海俞處，並作快速振顫法，時間略長一點。
  6. Abstract : this paper introduces bridge section model tests in the wind tunnel. it presents static forces on bridge section models. the effects of bridge fences, isolation belts and different model lengths on static forces are studied. the static and dynamic stabilities of bridge are analyzed. the results show the effect of bridge fence, isolation belts and different model lengths on static forces should be considered in wind load design

    文摘:通過橋梁節段模型風洞試驗測量了橋梁的風力，研究了橋面護欄和隔離帶以及變模型長度對模型風力的影響，並分析了橋的馳振穩定性和顫振穩定性.試驗結果表明：設計試驗方案以及應用試驗結果時應考慮模型長度、橋面護欄及隔離帶的影響
  7. 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

    飛行器的定常和非定常氣動力的準確數值求解及顫振特性研究，特別是跨音速范圍內的準確數值求解及研究，一直以來都是飛行器設計工作者必須面對的重要研究難題。
  8. The best machining trace of restrain vibrating in circular parts nc powerful turning

    環形件數控強力車削抑制顫振的最佳走刀路線
  9. The calculated results of three dimensional unsteady flow and flutter have proved that the methods presented in the thesis are satisfactory

    三維非定常氣動力和顫振的計算結果是令人滿意的。
  10. On the basis of cutting force model and vibration model of machine tools structure, the effect of the regenerative chatter on the stability of end milling is focused

    存得到切削力模型和機床結構振動模型的基礎上，著重研究了再生型顫振對銑削加工過程穩定性的影響。
  11. Second, the structural dynamic equations for blades are introduced in this paper. through numerically solving the aerodynamics - structure coupled equations, a 2 - d unsteady viscous flow in a single cascade is investigated under flow - structure coupled conditions, and a preliminary analysis of the cascade flutter is prosecuted

    其次，本文引入葉片結構動力學方程，通過數值求解氣動結構耦合方程體系，研究了氣固耦合條件下葉柵內的二維非定常粘性流動，並初步進行了葉柵的顫振分析。
  12. 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。
  13. 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。
  14. Based on the computational fluid dynamics and structural dynamics methods, a numerical analysis system for the blade flutter in turbomachinery was established

    在此基礎上，結合葉片振動結構動力學分析，初步建立了相對完整的葉片顫振數值分析系統。
  15. Flutter is the most important instable problem and it restricts the flight envelope and performance of a vehicle. aeroservoelasticity, including active flutter suppression technology, is a multidisciplinary optimization technology that studies the interaction of flexible structure, unsteady aerodynamics and flight control system

    以主動顫振抑制系統設計為代表的氣動伺服彈性力學（ ase ）是一門涉及柔性結構、飛行器運動引起的定常和非定常氣動力以及飛行控制系統相互作用的多學科技術。
  16. The mechanical model of panel flutter considering thermal effect is established by the use of von karman large deflection strain - displacement formulations, quasi - steady first - order piston theory aerodynamics and quasi - steady thermal stress theory. ( 3 )

    採用vonkarman大變形應變?位移關系、基於一階活塞理論的氣動力公式以及準定常的熱應力理論建立了考慮熱效應時復合材料壁板顫振的力學模型。
  17. In addition, aerodynamic stiffness and aerodynamic damping on the system are already obtained in the condition of fluid - structure interaction. it is known that aerodynamic loads are associated with blade vibration. the systematic eigenvalues are used to judge whether the flutter occurs so as to find the stable operating range of a wind turbine

    本文把風力機葉片簡化為懸臂梁，對梁截面的二維葉型建模，完整推導了二維葉型的線性運動微分方程和流構耦合條件下系統的氣動剛度和氣動阻尼，此時氣動載荷與結構的位移矢量以及速度矢量是相互耦合的，再利用系統的特徵值來判斷葉片顫振是否發生，從而獲得風機的穩定工作范圍。
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