介绍用迭代方法求解直升机桨叶气动载荷中的非线性强迫振动方程。
An iterative computation method for nonlinear forced vibration equation on helicopter blade aerodynamic load is given.
直升机桨叶下方，林木趋密，地势隆起，形成一道树木垂挂的石灰岩崖壁。
Beneath the helicopter's blades, the woods thicken and the terrain rises to a seam of limestone crag, dripping with trees.
在直升机桨叶的静强度分析中，传统的分析方法可能会由于载荷计算的不准确，给强度结论带来不确定性。
In the static strength analysis of helicopter blade, the traditional analysis method may lead to the uncertainty of the strength conclusion due to the inaccuracy of load calculation.
增加旋翼桨叶数量也是一种方法，这使得每片桨叶负载的直升机重量降低了，因此产生的噪音更小。
Then there's increasing the number of rotor blades. This helps because each additional blade carries less of the weight of the helicopter, and thus produces less noise.
这个神奇的飞行物看上去似乎是有腿的，或者是类似于直升机的桨叶。
The strange craft appears to have legs or blade-like parts similar to that of a helicopter.
提出了直升机模型桨叶颤振试验技术及试验方法。
An experimental technique and method for flutter research of helicopter blade model are proposed.
直升机的桨叶割断了输电线。
虽然与直升机外观相似，但自转旋翼机必须依靠向上流过桨叶地气流维持旋翼地旋转，产生将飞行器维持在空中地升力以及向前飞行地推力。
While similar to a helicopter rotor in appearance, the autogyro's rotor must have air flowing up and through the rotor disk in order to generate rotation.
计算结果表明，神经网络模型能够准确预测桨叶负扭度对直升机涡环状态的影响。
The result shows that the model of neural network can predict the effect of blade negative-twist on helicopter vortex-ring state.
旋翼设计包括桨毂构型、旋翼桨叶片数、旋翼直径、旋翼实度、翼型剖面等一系列影响直升机性能的因素。
Rotor design is comprised of some factors such as hub configuration, blade number, rotor diameter, rotor solidity and airfoil which have effects on helicopter performances.
作为直升机的关键动部件，桨叶的抗疲劳设计技术是提高桨叶安全寿命，降低桨叶使用成本的关键。
As a critical part of helicopter, rotor blade anti-fatigue design technique is one of the key to improving safety life and decreasing cost.
直升机旋翼桨叶除冰技术对保证直升机飞行安全是十分重要的。
The helicopter rotor blade deicing technique is greatly important to ensure the flight safe - ty.
而旋翼桨叶片数的选择，对轻型和中型直升机来讲，4片桨叶旋翼和5片桨叶旋翼具有典型意义。
As to the selection of rotor blade number for light and medium helicopter, 4 blade and 5 blade rotor are typical.
试验证明该理论可行并能用于研究无铰旋翼结构参数对桨叶气弹稳定性的影响，也能用于直升机旋翼的型号设计。
The experimental results verify that the feasible theory can be used to investigate the effects of structural parameters of hingeless rotor on aeroelastic stability.
采用子空间迭代法求它的特征解。Y—2直升机的玻璃钢桨叶进行动力特性分析。
Dynamic characteristics of composite rotor blades of Y-2 type helicopter are studied.
1979年末，我们加工了全尺寸y—2直升机复合材料桨叶成形凹模，从数控加工的结果看这种方法是成功的。
By the end of 1979, We had produced the full scale forming die of the composite rotor blades of Y-2 type helicopter. The results of the NC machining show that this method is successful.
基于桨叶二阶升力线理论和旋翼自由尾迹模型，本文在第三章建立了一个适合于直升机旋翼尾迹结构及桨-涡干扰气动特性分析的方法和模型。
In Chapter 3, based upon the blade second-order lifting-line model and rotor free-wake model, an analytical method is developed for predicting the rotor wake structure and BVI airload.
计算结果表明，旋转桨叶对直升机机载天线辐射场产生了显著的影响。
The computed results show that the antenna radiation field is interfered severely by the rotating blades.
第八名：贝尔uh - 1IROQUOIS(惠)是一种军用直升机搭载单涡轮轴发动机，具有双桨叶主旋翼和尾桨。
Number 8. BELL UH-1 IROQUOIS (HUEY) is a military helicopter powered by a single turboshaft engine, with a two-bladed main rotor and tail rotor.
第八名：贝尔uh - 1IROQUOIS(惠)是一种军用直升机搭载单涡轮轴发动机，具有双桨叶主旋翼和尾桨。
Number 8. BELL UH-1 IROQUOIS (HUEY) is a military helicopter powered by a single turboshaft engine, with a two-bladed main rotor and tail rotor.
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