...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>AIAA Journal >INFLUENCE OF BALANCED ROTOR ANISOTROPY ON HELICOPTER AEROMECHANICAL STABILITY
【24h】

INFLUENCE OF BALANCED ROTOR ANISOTROPY ON HELICOPTER AEROMECHANICAL STABILITY

机译：平衡转子各向异性对直升机气动力学稳定性的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The influence of balanced anisotropy in elastic, inertial, and aerodynamic properties on the aeromechanical stability of soft-in-plane rotor is examined. Balanced anisotropy will not produce large 1/rev vibratory loads experienced when one blade is dissimilar. Dissimilarities in flap stiffness, lag dampers, and aerodynamic properties have virtually no influence on the minimum damping. Dissimilarities in blade radius, mass and lag stiffness are most effective in improving aeromechanical stability. Stability continues to improve as the degree of balanced anisotropy increases unlike the case of one dissimilar blade. A 20/100 reduction in the radius of two opposite blades is able to stabilize ground resonance at 0 deg collective. For balanced anisotropy in radius, the destabilizing trend at roll resonance with increasing collective and decreasing body roll inertia is diminished. Balanced anisotropy in radius is less effective in stability augmentation for an articulated rotor. Appropriately combining dissimilarity in radius and lag stiffness can result in additional benefits for aeromechanical stability if the initial levels of anisotropy are moderate to small.
机译：研究了弹性，惯性和空气动力学特性中的各向异性各向异性对平面内转子的气动机械稳定性的影响。当一个叶片不同时，平衡的各向异性将不会产生较大的1 / rev振动负载。襟翼刚度，滞后阻尼和空气动力特性的差异实际上对最小阻尼没有影响。叶片半径，质量和滞后刚度的差异在提高航空机械稳定性方面最为有效。与一种不同的叶片不同，随着平衡各向异性程度的增加，稳定性不断提高。两个相对叶片的半径减小20/100就能稳定集体0度时的地面共振。对于平衡的半径各向异性，可以减小随侧倾惯性的增加和减小而导致的侧倾共振的不稳定趋势。半径的平衡各向异性对于铰接式转子的稳定性增强不太有效。如果各向异性的初始水平适中，则适当地组合半径和滞后刚度的不相似性可为航空机械稳定性带来更多好处。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号