螺桨转子的颤振涡动

 本文发展了螺桨转子颤振涡动的分析方法,考虑了桨叶的振动变形及桨轴一支承系统的振动特性、以及螺桨转子的不平衡力,并对运动方程借时域积分法求解,从而使分析结果更为准确。模型螺桨转子的分析计算与风洞试验结果吻合良好。

FLUTTER WHIRL OF THE PROPELLER ROTOR SYSTEMS

The effect of blade vibrations and unbalance force of propeller and the dynamic behavior of propeller shaft-support system are taken into consideration to imporve the accuracy of prediction of the maximum fly speed of a turbo-propeller plane limited by onset of propeller flutter whirl. Vibrations of the blade are expressed in truncated model coordinates of coupled bending-torsion virbration modes. Effecl on flutter whirl of the complicated propeller shaft-support system is considered by use of the experimental dynamic complex stiffness matrix at the flange mounting of propeller. Based on this improved model, governing equations of a parameter time-dependent system excited by unbalance force and nonlinear aeroelastic force are derived. To slove the equations the time domain integration method is employed. Onset of instability is determined by the obtained orbit. A model propeller for analysis and experiment is designed and prepared. Numerical analysis and tunnel test of the model propeller rotor are made. Results of calculation coincide with experiment pretty well. The analysis method presented in this paper is successful and accurate.