双掠结构旋翼桨叶动力学特性研究  

Study on Dynamic Characteristics of Double-swept Rotor Blade

作　　者：夏双满 林长亮 王金亮 张体磊 XIA Shuangman;LIN Changliang;WANG Jinliang;ZHANG Tilei(Aircraft Design and Research Institute,AVIC Harbin Aircraft Industry Group Co.,Ltd.,Harbin 150066,China;Aviation Military Representative Office of the Representative Bureau of Army Amament Department in Harbin Region,Harbin 150066,China)

机构地区：[1]航空工业哈尔滨飞机工业集团有限责任公司飞机设计研究所,哈尔滨150066 [2]陆军装备部航空军事代表局哈尔滨地区航空军事代表室,哈尔滨150066

出　　处：《航空工程进展》2022年第2期32-37,共6页Advances in Aeronautical Science and Engineering

基　　金：黑龙江省自然科学基金(JQ2020E006)。

摘　　要：双掠旋翼桨叶不仅能够提高旋翼的气动性能,还能有效降低旋翼噪声,但由于双掠桨叶几何结构的特殊性,前掠角度和后掠角度的变化对其动力学特性有很大影响,有必要对双掠桨叶动力学特性开展研究。运用Harmilton原理推导桨叶的运动方程,采用有限元法对旋翼系统进行简化,通过求解广义特征值,得到桨叶的各阶固有频率;在此基础上,分析前掠角度和后掠角度的变化对桨叶动特性的影响,得到参数影响规律。结果表明:前掠角度和后掠角度的变化对桨叶前三阶固有频率影响较小,随着后掠角度的增大,桨叶的四阶和五阶频率逐渐变小。The rotor blade double-swept-tip geometry can not only improve the aerodynamic performance,but also effectively reduce the rotor noise.However,due to the particularity of the geometric structure of the double swept blade,the changes of the sweep-forward angle and the backward sweep angle have a great impact on its dynamic characteristics,so it is necessary to study the dynamic characteristics of the double swept blade.The motion equation of the blade is derived with the Hamilton theory,the rotor system is simplified with the finite element method,the natural frequency of the blade is obtained by solving the generalized eigenvalue.On this basis,the influence of sweep-forward angle and sweep-backward angle on blade dynamic characteristics are analyzed,the results show that sweep-forward angle and sweep-backward angle have little influence on the low natural frequencies of the blade,and the fourth and fifth natural frequencies of the blade gradually decrease with the increase of sweep-backward angle.The research results provide technical support for the optimization design of double-swept blades.

关 键 词：直升机旋翼 桨叶 前掠角度 后掠角度 剖面特性 固有频率 

分 类 号：V211.52[航空宇航科学与技术—航空宇航推进理论与工程]