尾翼稳定

The flow visualization of the different afterbody of the airliner ;2. The flow Visualization of different afterbodies of airliner is undertaken with the fluorescence and the laser light sheet method in the water channel of BUAA.

利用荧光黄纳及片光在水槽中对具有不同收缩比的民机后体的复杂绕流进行流动显示，探讨了后体的分离尾涡特性及参数影响，实验发现后体收缩比改变时对应了两种典型的尾涡流态，即稳定流向尾涡和周期性尾涡，并进一步探讨了尾翼对后体尾涡的影响。

Applying combined method of quantitative analysis and qualitative analysis, on the basis of on ago research fruit, this paper firstly analyses main factors that affect the safe distance from friendly force to target for tank gun overhead firing systemically. Based on that, this paper builds math model of calculating the safe distance from friendly force to target separately aiming to the difference of tank gun overhead firing in plane and undulate terrain. At last, through applying Mathematica soft, this paper presents the safe distance from friendly force to target for a tank gun overhead firing used APFSDS, HEAT and HESH, combined qualitative analysis.

采用定量分析和定性分析相结合的方法，在以往研究成果的基础上，首先系统地分析并提出了影响坦克炮超越射击时友军至目标安全距离的主要因素；以此为基础，针对平坦地形和起伏地形上坦克炮超越射击的不同情况，分别建立了确定友军至目标安全距离的数学模型；最后通过运用Mathematica软件进行定量计算，并结合定性分析，提出了某型坦克炮使用尾翼稳定脱壳穿甲弹、空心装药破甲弹和杀伤爆破榴弹进行超越射击时友军至目标的安全距离。

The horizontal tail features a unique inverted stabilizer to achieve adequate negative lift for sustained high angle of attack climb attitudes.

水平尾翼的特点一个独特的倒置稳定达到足够的负面升降机持续的高攻角爬升的态度。

A finite element method model of three-dimension strength and vibration analysis for a fin-stabilited sabot-discarded penetrator is established.

根据尾翼稳定脱壳穿甲弹的几何形状特点，建立了尾翼稳定脱壳穿甲弹强度分析和振动分析的三维有限元计算模型。

By the finite element method model, Natural frequency and vibration model of some project fin-stabilitde sabot-discarded penetrator during launching are calculated and analyzed.

利用建立的三维有限元模型，计算分析了30阶尾翼稳定脱壳穿甲弹的振动固有特性，得到了各阶振动的固有频率及响应振型。

The research achievement provides valuable theory and advanced engineering method for engineering design, manufacture, improve and accident analysis of fin-stabilited sabot-discarded penetrator, and it has higher practical value to improve quality and efficiency of design, and reduce design cost for fin-stabilited sabot-discarded penetrator.

本文研究成果能为尾翼稳定脱壳穿甲弹的设计分析、研制、改型和事故分析提供参考，这种计算分析方法对提高脱壳穿甲弹的设计质量和效率，降低设计成本，有较大的实用价值。

In our next discussion we'll delve into the subjects of wing and tail area, weight and balance, and stability.

在我们下一步的讨论，我们将深入探讨的课题机翼和尾翼面积，重量和平衡，稳定的大局。

Aiming at the antiaircraft guided projectile with fins and a pair of canards, the angular motion model in its controllable trajectory was established. Based on Liapunov's direct method, the dynamic stability condition of the controllable projectile was deduced.

针对一对鸭舵、尾翼稳定式防空制导炮弹，建立了鸭舵控制作用下的有控弹道角运动模型，采用李雅普诺夫直接法导出有控炮弹自由运动动稳定条件。

APFSDS with many sabots is a typical multi-body system.

n个卡瓣和弹体构成的尾翼稳定脱壳弹系统是一种典型的多刚体系统。

The dual elevator system of claim 6, wherein said aircraft is a T-tail aircraft; and wherein said horizontal stabilizer is supported by said vertical stabilizer.

双电梯系统的索赔6日，其中说，飞机是T型尾翼飞机；并在其中表示，水平安定面的支持，表示垂直稳定。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。