直升机尾桨/尾梁耦合稳定性分析研究

Study of the Stability for Coupled Tial Rotor and Boom

单桨带尾桨直升机的尾旋翼设计成摆振柔软型后,带来了新的动力学问题:尾桨与尾梁耦合动不稳定性问题。本文简述了它与主旋翼/机体耦合动不稳定问题的差别,主要介绍了尾桨与尾梁耦合动不稳定性问题的分析方法,通过算例分析,为消除这种不稳定性,对一些关键设计参数提出了设计要求。

When tail rotor blade designed into soft in rotary plane,there is a new dynamical problem of coupling stability between tail rotor and tail boom for helicopters with one main rotor and tail rotor. In this paper,the differences between the problem and ground resonance of main rotor coupling with body is described.Analytical way of the stability is introduced mainly.Through analysis of an example,The design requirements for some key parameters are given out to eliminate the instability.