旋翼液弹阻尼器模型试验与非线性动力学特性分析

Model Experiment on Nonlinear Dynamics Characteristics of Rotor Fluidlastic Damper

在时域内建立了液弹阻尼器的数学模型,利用筒式液弹阻尼器试验件,进行液弹阻尼器动力学特性试验,研究结构参数、运动参数对液弹阻尼器性能的影响;并基于试验数据,进行非线性滞弹位移场(ADF)模型参数识别。结果表明,液弹阻尼器的动力学性能稳定,耗能能力强。通过液弹阻尼器模型重构曲线与试验曲线的比较,证实了本文模型能够模拟液弹阻尼器的动力学特性,可用于带液弹阻尼器的直升机旋翼系统气弹稳定性分析。

The mathematic model of fluidlastic damper is established in time domain.A dynamics characteristic experiment on helicopter tubular fluidlastic damper is carried out.Influences of configuration and motion parameters on dynamic characteristics of fluidlastic damper are studied.According to experimental data,parameters of the nonlinear（ADF） model are identified.Results show that the capacity of energy dissipation and dynamics performance fluidlastic damper are better than that of elastomeric damper.Hysteresis loops of fluidlastic damper model match well with the experimental curves.It indicates the availability of the nonlinear ADF model.Experimental and analytical results demonstrate that the nonlinear ADF model can be used in aeroelastic analysis of helicopter rotor with fluidlastic damper.