ABC共轴直升机旋翼/机身耦合振动响应分析  

Analysis of coupled rotor/fuselage vibration response of ABC coaxial helicopter

作　　者：王司文 韩景龙[2] 员海玮[2] WANG Si-wen;HAN Jing-long;YUN Hai-wei(National Key Laboratory of Helicopter Dynamics,China Helicopter Research and Development Institute,Jingdezhen 333001,China;State Key Laboratory of Mechanics and Control for Aerospace Structures,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]中国直升机设计研究所直升机动力学全国重点实验室,江西景德镇333001 [2]南京航空航天大学航空学院航空航天结构力学及控制全国重点实验室,江苏南京210016

出　　处：《振动工程学报》2023年第5期1318-1325,共8页Journal of Vibration Engineering

摘　　要：前行桨叶概念(Advanced Blade Concept,ABC)共轴直升机具有较大的振动问题,为研究振动机理,建立了ABC共轴旋翼/机身耦合气动弹性模型,其中桨叶采用有限元梁模型,机身采用精细有限元模型。为提高耦合模型的气动弹性响应分析精度,结合传统CFD/CSD耦合分析方法与自由尾迹,提出了CFD/CSD/自由尾迹耦合计算方法,解决了传统方法的尾迹耗散问题,并保证了计算效率。基于此方法建立了ABC共轴直升机旋翼/机身耦合气弹响应分析方法。以样例ABC共轴直升机为研究对象,总结了重点位置振动响应随前进比和旋翼交叉角的变化规律,并得出了一些有意义的结论。Advanced Blade Concept(ABC)coaxial helicopter has a large vibration problem.In order to study the vibration mecha-nism,a ABC rotor/fuselage coupled aeroelastic model is established,in which the blade is modeled by a finite element beam mod-el,the fuselage is a fine finite element model.In order to improve the accuracy of the aeroelastic response analysis,combined with the traditional CFD/CSD coupled analysis method and the free wake,a CFD/CSD/Free Wake coupled method is proposed to solve the wake dissipation problem of the traditional method,and the calculation efficiency is guaranteed.Based on this method,the coupled aeroelastic response analysis method of ABC helicopter is established.Then,the variation rule of the vibration re-sponse of the key position with the forward ratio and the rotor cross angle is summarized,and some significant conclusions are ob-tained.

关 键 词：CFD/CSD耦合 ABC共轴直升机 旋翼机身耦合 自由尾迹 

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] V275.1