Whirl flutter analysis of prop-rotors using unsteady aerodynamics reduced-order models

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• 来源
  《Aeronautical journal》 |2008年第1131期|共页
• 作者

  M. Gennaretti; L. Greco;

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• 原文格式 PDF
• 正文语种 eng
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• 关键词

  a: lift curve slope; A_0, A_1: transfer function matrices between pylon dofs and blade aerodynamic loads; A, B, C: matrices related to the rational matrix approximation; c: section chord; c_D: section drag coefficient; C(k): theodorsen lift deficiency function; C_x,C_y: non-dimensional yaw and pitch damping; E_n(s): transcendental transfer function matrix between v and blade aerodynamic loads; f~(in), f~(out): in-plane and out-of-plane aerodynamic section loads; F_n: in-plane aerodynamic non-dimensional force on the n-th blade; h: pivot point distance from rotor hub; I_b: blade moment of inertia wrt the hub; I_x, I_y: non-dimensional pylon yaw and pitch moments of inertia (including rotor mass); K: non-dimensional pylon spring restraints matrix; K=ωc/2Ωr: section reduced frequency; K_x,;

  机译：a：升力曲线斜率;A_0;A_1：吊架自由度和叶片气动载荷之间的传递函数矩阵;A;B;C：与有理矩阵近似有关的矩阵;c：和弦;c_D：截面阻力系数;C（k）：西奥多森举起缺乏功能;C_x;C_y：无量纲的偏航和俯仰阻尼;E_n（s）：v和叶片空气动力载荷之间的先验传递函数矩阵;f〜（in）;f〜（out）：面内和面外空气动力截面载荷;F_n：第n个叶片上的平面内空气动力学无量纲力;h：距转子轮毂的枢轴点距离;I_b：轮毂的叶片惯性矩;I_x;I_y：无量纲的塔架偏航角和俯仰惯性矩（包括转子质量）;K：无量纲的挂架弹簧约束矩阵;K =ωc/2Ωr：截面降低的频率;K_x;