thrust drag

Lateral Vibration Analyses of Flying Vehicle under Thrust and Drag

在推力和阻力作用下飞行器横向振动分析

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The fastest human-powered vehicles at sea levels are recumbent bicycles enclosed in streamlined aerodynamic shells. These vehicles have an upper speed limit near 40 m/ s-the speed at which the human can just barely produce enough thrust to balance the drag force from the air.

目前最快的人力车是包裹在流线型空气动力学外壳里的躺式自行车，这种自行车的速度最快能达到将近每秒40米，再快人力就已经不足以抗衡空气阻力了。

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After that the paper analysis the thrust and drag of regional tourism enterprise groups' organization structure change from external and internal aspects.

再次，分别从外部和内部分析了区域旅游企业集团组织结构变革的推力与阻力。

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The conclusions obtained are applicable for active accelerating and passive decelerating parts of trajectory as well as the cruise flight when thrust and drag are balanced.

文中得到的主要结论适用于主动加速段、被动减速段和推力与阻力平衡时的巡航段。

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In Bohai Bay basin, there are some oil bearing structures, such as buried hill drape anticline structure, drag structure, gravity slumping structure, thrust structure and complex subtle fault structure combined by inhomogeneous and asynchronous structure.

在盆地内，常出现含油的潜山披覆背斜构造、拖曳构造、重力滑动构造、冲断构造和不同时期不同类型构造复合叠加而成的复杂隐蔽断裂构造。

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The tether system would experience a force in its direction of motion, yielding thrust instead of drag and raising its orbit.

缆索系统会受到顺著其运动方向的力，造成推进而非拖曳，因此轨道会提高。

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The drag of cavity decreases with increasing fuel equivalence ratio, and could be converted into the thrust, instead of drag, under combustion mode which is close to real statue of scramjet.

在实际超燃冲压发动机工况下，凹腔火焰稳定器的阻力随着当量比的增加而减小，并最终会表现为正推力。

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In this paper, the influence of thrust and air drag on rocket lateral vibration is studied, and the frequency reduction under the thrust and drag is analyzed. The formulas for evaluation of the changes of frequencies and vibration modes are obtained.

文章重点讨论了推力和空气阻力对火箭横向振动频率和振型的影响，分析了在推力和阻力作用下频率降低的原因，给出了推力对振型频率影响的估计式。

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The unfolding dynamic model of rudder wings acted by spring thrust, air drag, centrifugal force and inertial force is established.

该论文以某制导炮弹为例，建立了舵翼在弹簧推力、空气阻力、离心力和惯性力作用下的张开动力学模型。

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If thrust and drag do not equal each other, the airplane can not fly at a constant speed.

如果推力和阻力彼此不相等，飞机就不同能等速飞行。

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