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首页> 外文期刊>Journal of the American Helicopter Society >Evaluation of Rotor Structural and Aerodynamic Loads Using Measured Blade Properties
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Evaluation of Rotor Structural and Aerodynamic Loads Using Measured Blade Properties

机译：使用测得的叶片特性评估转子的结构和空气动力负荷

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摘要

The structural properties of Higher Harmonic Aeroacoustic Rotor Test (HART I) blades have been measured using the original set of blades tested in the wind tunnel in 1994. A comprehensive rotor dynamics analysis is performed to address the effect of the measured blade properties on airloads, blade motions, and structural loads of the rotor. The measurements include bending and torsion stiffness, geometric offsets, and mass and inertia properties of the blade. The measured properties are correlated against the estimated values obtained by the manufacturer of the blades. The previously estimated blade properties showed consistently higher stiffnesses, up to 30% for the flap bending in the blade inboard root section. The measured offset between the center of gravity and the elastic axis is larger by about 5% chord length, as compared with the estimated value. A comprehensive rotor dynamics analysis is carried out using the measured blade property set for HART I rotor. A significant improvement in blade motions and structural loads is obtained with the measured blade properties. The location of the center of gravity and the elastic axis and their offset are shown to be the most influential factors for the improved correlation.
机译：使用1994年在风洞中测试的原始叶片组对高谐波空气声转子试验（HART I）叶片的结构性能进行了测量。进行了全面的转子动力学分析，以解决测得的叶片性能对空载的影响，叶片运动和转子的结构载荷。测量包括弯曲和扭转刚度，几何偏移以及叶片的质量和惯性属性。所测量的特性与叶片制造商获得的估计值相关。先前估计的叶片性能始终显示出较高的刚度，叶片内侧根部的襟翼弯曲高达30％。与估计值相比，测得的重心和弹性轴之间的偏移弦长大约为5％。使用为HART I转子设置的测得的叶片特性，可以进行全面的转子动力学分析。利用测得的叶片特性，可以显着改善叶片运动和结构载荷。重心和弹性轴的位置及其偏移被显示为改善相关性的最有影响力的因素。

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