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旋翼柔性梁是整个无轴承旋翼的核心部件,柔性梁在承受巨大的离心力的同时还要满足挥舞、摆振以及变距的刚度要求。由于柔性梁结构不存在实际的变距铰,旋翼的变距操纵要靠柔性梁结构的大变形扭转实现,纤维复合材料可裁剪设计的特性正好满足了这一要求。文章主要针对柔性梁结构的扭转刚度进行了分析计算,分析了八种特殊界面的扭转刚度,比较了复合材料与金属材料的扭转刚度,得出的结论可以为工程上柔性梁的扭转刚度设计提供参考。
The rotor flexible beam is the core component of the entire bearingless rotor. The flexible beam, while subjected to great centrifugal force, also meets the requirements of waving, shimmy and pitch stiffness. Due to the fact that there is no real pitch change in the flexible beam structure, the rotor pitch change control depends on the large deformation twist of the flexible beam structure. The characteristics of the fiber composite material cutting design exactly meet this requirement. In this paper, the torsional stiffness of flexible beam structure is analyzed and calculated. The torsional stiffness of eight special interfaces is analyzed and the torsional stiffness of composite materials and metal materials is compared. The conclusion can be provided for the torsional stiffness design of flexible beams reference.