某直升机“空中共振”分析

直升机“空中共振”问题,是一种危及直升机飞行安全的自激振动问题,是直升机设计中必须解决的问题。某直升机“空中共振”计算,是指该直升机在悬停状态的“空中共振”计算。在计算过程中,应用“八五”重点预研课题《星形柔性桨毂直升机“空中共振”计算方法研究》的研究成果,建立了“空中共振”计算模型,研制了一套实用的计算软件,分别采用临界稳定性分析法和特征根分析法进行“空中共振”计算,并进行了计算结果的对比,得出了明确的计算结论。

AIR RESONANCE ANALYSIS OF SOME HELICOPTER

Air resonance problem of helicopter is a problem of self-actuating vibration wihch can be dangerous for helicopter flight safety.It must be solved for helicopter design.Air resonance calculation of some helicopter refers to calculation of air resonance in hover.In process of calculation,air resonance calculation model was set up with the research achievements of Investigations on air resonance calculation methods of helicopter with starflex hub,and a set of practical calculation software was developed for air resonance calculation using critical stability analysis and eigenvalue analysis respectively.Calculation results were compared and clear calculation conclusions were also drawn.