风电机组偏航制动器制动稳定性分析

针对风电机组偏航制动器制动不稳定问题，基于ABAQUS软件开展偏航制动器制动稳定性分析。运用复特征值分析法和不稳定倾向系数TOI值，分析制动压力、摩擦系数、偏航速度、弹性模量以及开槽方式等对制动稳定性的影响。基于全因子试验及Design-expert软件建立不稳定倾向系数TOI值响应面模型，并开展相关参数优化。研究表明：对制动稳定性具有显著影响的因素是摩擦系数、偏航制动缸弹性模量、摩擦片弹性模量；开双槽的摩擦片对制动稳定性影响显著，开单槽影响较小；制动稳定性受制动压力与偏航速度影响很小；参数优化后的偏航制动器制动不稳定系数降低73.7%。该研究结论可为偏航制动器设计、开发提供理论指导。

BRAKING STABILITY ANALYSIS OF WIND TURBINES YAW BRAKE

Aiming at the problem of yaw brake instability of wind turbine, the yaw brake stability analysis was carried out based on ABAQUS software. The influence of braking pressure, friction coefficient, yaw speed, elastic modulus and slotting mode on braking stability was analyzed by using complex eigenvalue analysis and instability tendency coefficient TOI value. Based on the full factor test and Design-expert software, the TOI value response surface model of the instability tendency coefficient was established, and the relevant parameters were optimized. The results show that the friction coefficient, the elastic modulus of yaw brake cylinder and the elastic modulus of friction plate have significant influence on the braking stability. The friction plate with double groove has significant influence on the braking stability, while thesingle groove has a little influence. Braking stability is little affected by braking pressure and yaw speed. The braking instability coefficient of yaw brake after parameter optimization is reduced by 73.7%. The research conclusion can provide theoretical guidance for the design and development of yaw brake.