带粘弹减摆器的旋翼/机体耦合系统稳定性分析  

Stability Analysis of Coupled Rotor/Fuselage System with Elastomeric Lag Damper

作　　者：韩景龙[1] 杨卫东[1] 孙久厚[1] 

机构地区：[1]南京航空航天大学振动工程研究所,南京210016

出　　处：《振动工程学报》2002年第4期471-475,共5页Journal of Vibration Engineering

基　　金：JS5 2国防重点实验室基金 (编号 :99JS5 2 .4 .2 .HK0 2 13);航空支撑科技基金资助项目 (编号 :0 2 A5 2 0 0 5 )

摘　　要：对一种非线性橡胶减摆器进行了有限元建模及线化分析 ,并考虑带有这种减摆器的直升机地面与空中共振问题。按带有减摆器和不带有减摆器两种情况进行计算 ,结果表明 ,该型减摆器具有优越的阻尼性能 ,并且由于减摆器的非线性特征 ,稳态摆振角也对稳定性具有明显影响 ,进一步说明了减摆器设计的重要性 ,本文所用粘弹性减摆器数学模型 ,不同于已有模型 [1～ 2 ] ,体现了材料的超弹性和不可逆与记忆减退特征 。In this paper, a nonlinear elastomeric lag damper is linearly modeled and analyzed using finite element method and its effect on air hover resonance and ground resonance stability is investigated. Two cases with and without damper are calculated respectively. The computational results show that this damper has excellent damping property, and the steady lag angle has a significant influence on the damper behavior. The mathematical model of the damper in this paper is different from the ones in other papers . The surper elasticity and not reversible property and property of memory fading of materials are considered. So, it may be used in analysis of nonlinear visco elasticity materials in general

关 键 词：直升机 减摆器 粘弹性结构 稳定性 摆振角 

分 类 号：V212.121[航空宇航科学与技术—航空宇航推进理论与工程]