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- aerodynamic forces of train 列车气动力
- The linear aerodynamic forces of airship hull were calculated in terms of Munk airship theory. The linear aerodynamic forces of airship hull were calculated by Allen viscous cross flow theory. 根据势流理论对飞艇艇身线性气动力进行分析计算,由于飞艇艇体是旋成体,故根据Allen的横流阻力理论对其所受的非线性气动力进行计算;
- The present method can be used to calculate the aerodynamic forces of a circulation control airfoil performing translating and pitching oscillation with moderating amplitude and frequency. 本文 的方法可以计算控制环量翼型以适当振幅和频率作平移和俯仰振荡时 的气动力。
- Wind fences can reduce aerodynamic force of railway vehicle in the cross-winds,and the performances of wind fences might be affected by many factors. 防风栅可降低铁道车辆在横风作用下铁道车辆所受的气动力,其抗风性能受许多因素影响。
- The results show that, uneven stator mistuned design couldn't reduce aerodynamic force of rotor blade, but lead to bigger frequency division of spectrum and amplitude. 分析结果标明:非均匀叶栅非谐设计并不能降低转子叶片表面激振力,同时会引起频率成分和幅值都较大的倍频成分;
- Through calculation of unsteady flow field of stator-rotor model, the spectrum and amplitude of unsteady aerodynamic force of two mistuned design packages were compared. 通过对静子-转子模型流场进行非定常计算,比较了两种非谐设计思想下转子叶片表面气动激振力频谱成分和幅值大小。
- The forces of reaction made reform difficult. 反动势力给改革造成了困难。
- We are scornful of the forces of convention. 我们藐视习惯势力。
- By contrasting the computed aerodynamic force of flexible flapping-wing and rigid wing, it is found that if the flexibility is controlled suitable, it can enlarge the lift and thrust effectively. 通过计算分析柔性扑翼的气动特性发现,控制适当的话,柔性变形能大大改善扑翼的气动性能。
- To reduce the resonance stress of rotor blade under wake aerodynamic force of front stator vane, and also extend the fatigue endurance, the aerodynamic mistuned of stator vane was analyzed. 摘要为降低转子叶片在前排静子叶片尾流激振情况下的共振应力,提高转子叶片疲劳寿命,对静子叶片的气动非谐设计进行研究。
- The forces of Cassius were hard pressed early in the battle. 在战斗初期,卡修斯的部队处境艰难。
- For many years the motive power of train be steam. 好多年,火车的动力是蒸汽。
- Napoleon conquered by the force of an iron will. 拿破仑攻无不克靠的是坚强的意志。
- Do you know any time of train opening? 你知道火车什么时间开吗?
- The aerodynamic forces on any control surface produce a moment about the hinge. 在任何操纵面上的空气动力均产生围绕其铰链轴的力矩。
- His efforts were defeated by the forces of reaction. 他的努力被反动势力挫败。
- Axle counter A method of “train detection”. 计轴器一种“列车检测”方式。
- Emergency exit at both ends of train. 紧急出口在列车的两边尾端.
- The destructive force of the storm is huge. 暴风雨的破坏力是巨大的。
- The aerodynamic forces acting on trains increase greatly under strong cross-wind,which is closely associated with train stability. 在强侧风作用下,作用于列车的气动力迅速增加,严重影响列车运行的稳定性。