一种直升机粘弹减摆器时域模型参数识别方法  

A Time-Domain Methodology for Identifying Model Parameters of Elastomeric Lag Dampers

作　　者：于佰明[1] 韩景龙[1] 

机构地区：[1]南京航空航天大学航空宇航学院,南京210016

出　　处：《南京航空航天大学学报》2003年第3期288-292,共5页Journal of Nanjing University of Aeronautics & Astronautics

基　　金：JS5 2直升机旋翼动力学国防科技重点实验室基金 ( 99JS5 2 .4.2 .HK0 2 1 3 )资助项目

摘　　要：在时域内建立了直升机粘弹减摆器的非线性模型。该模型基于不可逆热力学原理 ,在线性滞弹性位移场( Anelasticdisplacementfields,ADFs)模型的基础上 ,通过一组材料状态变量函数引入了粘弹性材料的非线性特性 ;文中以硅橡胶为研究对象 ,在粘弹减摆器实际工作中比较典型的幅值和频率范围内 ,进行了简谐实验 ,并通过两位移幅值 ( 0 .1 cm,0 .6cm)的应变 /应力滞迟回线直接进行模型参数识别。最后 ,通过与线化复模量、不同幅值的应变 /应力的滞迟回线等实验数据比较 ,证实了本文模型具有较好的可靠性 。A time domain model incorporating nonlinear dynamic behavior of elastomeric lag dampers is developed. The current approach based on principles of irreversible thermodynamics is presented. It extends the linear anelastic displacement fields (ADFs) method to model the material nonlinearities, which are introduced via the functions governed by the material state variables. The silicone based elastomer is investigated through extensive tests of amplitudes (0 1～0 6 cm) and frequencies (2 Hz, 4 Hz). The test is chosen to represent the working range of typical helicopter damper. The parameters appeared in the model are identified through two strain stress hysteresis loops, whose displacement amplitudes are 0 1 cm and 0 6 cm. Finally, the modeling approach is validated against linearized complex moduli data and strain stress hysteresis loops at various strain amplitudes and static strain offset. This work provides a framework for continuing research on elastomeric dampers and their effects on rotor performance and stability.

关 键 词：直升机 粘弹减摆器 时域模型 参数识别 不可逆热力学原理 旋翼 

分 类 号：V224[航空宇航科学与技术—飞行器设计] V275.1