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Dynamic Modeling of Helicopter Rotor Blades

机译:直升机旋翼桨叶的动态建模

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This paper is concerned with the dynamic analysis of a pre-twisted rotating composite rotor blade. General kinematical relations for a beam theory that treats finite rotation are established. Two sets of analyses are extracted from the 3-D nonlinear blade analysis: one the 2-D linear cross section analysis, and the other the 1-D nonlinear blade analysis. The Danielson-Hodges generalized measures and Green strain are introduced to calculate strain-displacement relations. In addition, rotor structural dynamics is developed with multi-body formulation. The Hartenberg-Denavit method is introduced and the recursive computation method for the position vector of a generic point in an inertial frame is derived. In comparison with measurements from Minguet's experiment and blade-droop stop impact tests, the results are in good agreement with them.
机译:本文涉及预扭旋转复合转子叶片的动力学分析。建立了处理有限旋转的梁理论的一般运动学关系。从3-D非线性叶片分析中提取了两组分析:一组是2-D线性横截面分析,而另一组是1-D非线性叶片分析。引入了Danielson-Hodges广义测度和格林应变来计算应变-位移关系。此外,转子的结构动力学是通过多体配方开发的。介绍了Hartenberg-Denavit方法,并推导了惯性系中通用点位置矢量的递推计算方法。与Minguet实验和叶片下降停止冲击试验的测量结果相比,结果与它们非常吻合。

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