无轴承旋翼气弹动力学多目标减振优化

The aeroelastic dynamics multi-objective optimization for vibration reduction of bearingless rotor

提出了无轴承旋翼柔性梁及扭管处的等效匹配处理方法,建立了无轴承旋翼的优化设计模型,采用混合法的灵敏度分析技术、Kriging的代理模型及改进遗传模拟退火算法的优化策略对某型无轴承旋翼进行了减振的气弹动力学多目标优化。结果表明:其桨毂谐波振动载荷与优化前相比,径向力、横向力、垂直力分别降低了24.2%、19.5%、15.8%;滚转力矩、俯仰力矩、偏航力矩分别降低了21.4%、20.8%、20.9%;3/转变距拉杆拉力、4/转变距拉杆拉力、5/转变距拉杆拉力分别降低了11.6%、18.4%、8.1%。表明本文方法减振效果明显。

The equivalent matching processing method for the flexible beam and torsional tube and established the optimization designing model of the bearingless rotor is proposed. The multi-objective optimization for bearingless rotor vibration reduction is realized by using the optimization strategy of hybrid method of sensitivity analysis, surrogate model of Kriging and improved genetic simulated annealing algorithm. A certain type of bearingless rotor is taken as an example. Compared with the case before optimization, the radial load of the hub vibration loads is reduced by 24.2%, transverse load is decreased by 19.5%, vertical load reduced by 15.8%, roll moment reduced by 21.4%, pitching moment reduced by 20.8%, the yaw decreased by 20.9%, the pitching rod of 3/r decreased by 11.6%, 4/r decreased by 18.4%, 5/r decreased by 8.1%. It demonstrates that the effect of bearingless rotor vibration reduction optimization is obvious.