摘要
无轴承旋翼存在强烈的非线性扭转-弯曲耦合变形。推导了桨叶的非线性应变-位移关系,应用Hamilton原理建立了多路传力的无轴承旋翼桨叶运动的有限元方程,气动力模型采用二维准定常片条理论,考虑了耦合变形对桨叶轴向弹性位移的影响,并构造了一个新的15自由度梁单元,分析了悬停状态下的无轴承旋翼气弹稳定性。数值结果表明:考虑耦合变形对轴向弹性位移的影响可以提高悬停状态下的无轴承旋翼气弹稳定性分析的精度。
The analysis of a bearingless rotor blade is complicated because of strongly nonlinear bending-torsion coupling effects.Nonlinear strain-displacement relations are presented and a bearingless rotor blade is modeled with multiple-load-path and the governing differential equations of motion are obtained from Hamilton＇s theory.Two-dimensional quasi-steady strip theory is used to evaluated aerodynamic forces.A new 15 DOF beam finite element is developed for analysis.Aeroelastic stability of bearingless rotors with consideration of coupling effect in axial deformation in hover is investigated.Numerical results show that taking account of coupling effect in axial deformation can improve the accuracy of aeroelastic stability of bearingless rotors.
出处
《沈阳航空工业学院学报》
2010年第5期1-5,共5页
Journal of Shenyang Institute of Aeronautical Engineering
基金
国家自然科学基金(项目编号:10672011)
关键词
直升机
无轴承旋翼
多路传力
气弹稳定性
耦合
悬停
helicopter
bearingless rotor
multiple-load-path
aeroelastic stability
coupling
hover
作者简介
高文杰（1968～），男，湖南长沙人，副教授，博士研究生，主要研究方向：直升机动力学、复合材料力学等，E—mail：Gaowenjie@126．com。
