考虑发动机推力影响的机翼颤振分析  

Flutter analysis of wings subjected to engine thrusts

作　　者：陈全龙[1] 韩景龙[1] 员海玮[1] 

机构地区：[1]南京航空航天大学机械结构力学与控制国家重点实验室,江苏南京210016

出　　处：《振动工程学报》2012年第2期110-116,共7页Journal of Vibration Engineering

基　　金：国家自然科学基金资助项目(11102085);高等学校博士学科点专项科研基金(20113218110002)

摘　　要：发动机安装在机翼上时,其推力具有典型的随动特征,并对机翼颤振产生重要影响。基于有限元分析软件MSC/Nastran的DMAP开发,提出了一种考虑发动机推力和几何非线性影响的机翼颤振分析方法。作为验证,分析了推力对某高空长航时飞行器机翼颤振速度的影响,与已有结果吻合良好。对一带有两个发动机的复杂机翼结构进行了结构建模和颤振分析,重点分析了推力大小及作用位置对颤振速度的影响。结果表明,发动机的推力效应在颤振分析中是不应忽略的。For wing-mounted engines,the propulsion is a typical following force and may cause the significant influences upon wing flutter characteristics.Based on the secondary development of MSC/Nastran software with DMAP language,an integrated flutter analysis method has been presented.And the effects of engine thrusts and geometrical nonlinearities are considered within this method.Firstly,the method introduced in the present paper has been applied to evaluate the effects of thrusts on the flutter boundary of a high-altitude,long-endurance aircraft wing.The numerical results have an excellent agreement with the published ones.Furthermore,the finite element model of a wing carrying two engines has been built,and the influences of propulsion magnitude and position on wing flutter speed are mainly investigated.The results showed that the effects of engine thrusts are indispensable for wing flutter analysis.

关 键 词：机翼颤振 几何非线性 发动机推力 追随力 大展弦比机翼 

分 类 号：V215.3[航空宇航科学与技术—航空宇航推进理论与工程]