桨叶

For a kind of nonlinear dynamic absorber of blade out of plane, the combination resonance is studied in Chapter 6 by using the method of multiple scales. The approximate steady state solution of the first order is derived first Then, the stability and bifurcation properties of the system response are investigated.

我们针对一种桨叶挥舞方向的非线性动力吸振摆，利用多尺度法考察了它发生组合共振的情形，给出了系统响应的一阶近似稳态解，并且详细分析了系统响应的稳定性和分叉特性。

The rotor down-wash flow field was calculated using generalized down-wash flow model.

结合动量理论和涡流理论，推导了桨叶环量方程，用广义尾流模型计算了旋翼下洗+流场。

A "hot-whirl" test stand was established for dynamic testing of XV-1 rotor blades and tip combustors Fig.

&热，发晕&试验台，建立了动态测试的第XV - 1旋翼桨叶和提示燃烧室（图11 ）。

An articulated rotor with a blade hinge offset and with an elastic restraint about the flap hinge is used as the rotary wing dynamic model.

旋翼动力学模型采用水平铰外伸量和桨叶根部有弹性约束的结构模型。

The rotor dynamical model takes the form of an articulated rotor with flap and lag hinge offset,precone and prelag angle and hinge spring.

分析了直升机旋翼的预锥角、预掠角、桨叶根部的约束刚度和阻尼对直升机操纵性和稳定性的影响。

Bow Thruster 艏侧推 In the fore body one electric-operated bow thruster of 700 kW with fixed propeller blades will be installed.

在船首安装有1台功率为700kw，带固定桨叶的电动艏侧推，转速分为3级。

That both improves power production and minimises the strain on the blades and the tower.

这样一来既提高了发电量也把桨叶与塔身的受力降到了最低。

Researches on fluid dynamic performance of aquatic sports equipment in China were started early, mainly involving with the aerodynamic characteristics of sailboats, sailboards and wind sails, the propulsive char-acteristics of the propeller of racing boats and leather rowboats, the propulsive characteristics of swimming flaps, etc.

我国的水上运动器材的流体动力性能研究起步较早，主要涉及到帆船、帆板、风帆的空气动力特性和船体水动力性能，赛艇、皮划艇桨叶推进特性，蹼泳板的推进性能等等。

At each dp of the two-bladed rotor is a ram-jet engine, weighing a mere 2.5 kilos and running on either ordinary petrol or fuel oil.

在每两个桨叶旋翼DP是一个冲压喷气发动机，重量仅2.5公斤，并于上述普通汽油或燃油运行。

To get the biggest power coefficient at various of wind speed, put out the argument of controlling wind turbine according to the wind pressure which act on the wind wheel swept area. Design and make a wind turbine which can adjust pitch angle of oar leaves through various of wind speed, and make experiment of characteristic.

1引盲 传统的风力机优化设计方法是以桨叶各截面在设计风速处具有最大的功率系数为目标，设计是针对事先确定的一个设计风速进行的，风力机只能在设计风速点处获得最大功率系数。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。