以直升机主旋翼桨毂星形件为例，给出分析计算结果。
A composite main rotor yoke is used in an example problem to demonstrate the reliability analysis.
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.
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