空气动力学学报2024，Vol.42Issue(10)：30-39,10.DOI:10.7638/kqdlxxb-2023.0162
大速度条件下的旋翼气弹动载荷特性分析
The analysis on rotor aeroelastic loads characteristic in high speed condition
余智豪 1李春华 1黄水林 1程毅 1赵金瑞1
作者信息
- 1. 中国直升机设计研究所直升机动力学全国重点实验室,景德镇 333001
- 折叠
摘要
Abstract
The analysis of rotor aeroelastic and the prediction of vibration load are still challenges in conventional helicopter design.A rotor aeroelastic loads computing method was adopted and rotor dynamics issue in high speed forward flight was analyzed.With slender and flexible rotor blade,the rotor dynamics model was built with the Hamilton principle and the middle deformation beam theory.The aerodynamic model was built based on dual free wake model to catch the negative lift at blade tip and rotor interaction in high speed flight.Finally the computing method was validated and used in loads characteristic analysis.The result in B0105 rotor analysis indicated that the strong negative lift was rapidly grow at blade tip in advancing side,the lift offset moment was periodically alternate and pulsed.The harmonic loads of blade root vertical shear force and flap bending moment was rapidly grow,the fourth order harmonic amplitude of the root flapping moment increased the most.The fourth order harmonic of hub vertical force,roll moment and pitch moment was also rapidly grow,the increment of hub vertical force was the largest.The high frequency elastic torsion deformation appeared due to the strong negative lift and impulse moment,and the pitch link load was deteriorated.关键词
直升机/旋翼/振动载荷/拉杆载荷/大速度Key words
helicopter/rotor/vibration load/pitch link load/high speed分类
航空航天引用本文复制引用
余智豪,李春华,黄水林,程毅,赵金瑞..大速度条件下的旋翼气弹动载荷特性分析[J].空气动力学学报,2024,42(10):30-39,10.
