大型水平轴风力机叶片二自由度气弹稳定性分析

PDF(1320 KB)

振动与冲击 ›› 2012, Vol. 31 ›› Issue (20) : 65-68.

论文

大型水平轴风力机叶片二自由度气弹稳定性分析

朱由锋，任勇生

作者信息 +

NUMERICAL ANALYSIS OF AEROELASTIC STABILITY FOR TWO-DEGREES OF FREEDOM LARGE HORIZONTAL AXIS TURBINE BLADES

ZHU Youfeng ，REN Yongsheng

Author information +

文章历史 +

摘要

本文根据Kallesøe大型水平轴风力机叶片模型下的动力学方程对无阻尼系统进行有限差分离散后，运用Greenberg气动理论施加分布气动力，得到不对称刚度和一般粘性阻尼的二自由度气弹方程。通过建立系统的线性定常状态空间方程，利用极点实部最大值对叶片的气弹稳定性进行了解析，得到了风速、转速、弹性模量、桨距角、空气密度和叶片密度的稳定性曲线，最后用系统的阶跃时间响应进行了验证。

Abstract

According to Kallesøe’s equations of blade motion, new model describes two-degrees aeroelastic equations of asymmetric rigidity and general viscous damping, by means of a finite difference discretization and Greenberg aerodynamic theory. A linearized stationary state space of the system can prove the model valid , by analyzing step response graphs and stability of variable parameters such as wind velocities, rotor Speeds, elastic modulus, pitch angles, air densities and densities of blades.

导出引用

朱由锋;任勇生. 大型水平轴风力机叶片二自由度气弹稳定性分析[J]. 振动与冲击, 2012, 31(20): 65-68

ZHU Youfeng;REN Yongsheng. NUMERICAL ANALYSIS OF AEROELASTIC STABILITY FOR TWO-DEGREES OF FREEDOM LARGE HORIZONTAL AXIS TURBINE BLADES [J]. Journal of Vibration and Shock, 2012, 31(20): 65-68