轴向可伸缩复合材料悬臂梁的非线性振动研究

以航空领域中可变体机翼的伸缩变形过程为研究对象,对可伸缩悬臂复合材料层合梁的时变非线性振动进行理论研究.建立可伸缩悬臂复合材料层合梁在外载荷作用下的非线性动力学模型;根据时变系数非线性动力学方程研究时变非线性振动特性.分析可伸缩悬臂复合材料层合梁在外伸与收缩变形过程中的非线性动力学特性.从数值结果上看:模型的外伸速度、飞行速度对振动的影响较大,初值对振动的影响较小.

MODELING AND NUMERICAL ANALYSIS OF AN AXIALLY MOVING COMPOSITE LAMINATED CANTILEVER BEAM

In this paper, we will conduct the basic research on the time-varying nonlinear dynamic responses of a deploying-and-retracting composite laminated cantilever rectangular beam subjected to several external excitations on the basis of the telescopic wings. The main contents of this project are as follows: The nonlinear dynamics modeling for the deployable-and-retractable cantilevered laminated composite beams subjected to the external excitations; Research on the time-varying nonlinear vibration characteristics of the plate during the deploying-and-retracting process, and investigate the time-varying parameter differential equations; This project is intended to analyze the time varying nonlinear dynamic phenomena during the deploying and retreating process for the composite laminated cantilever beams. At last, numerical simulations are used to analyze the complex nonlinear of the axially moving cantilever beam. The velocity of beam during deployment and retrieval, flight speed of aircraft, aerodynamic and velocity perturbation frequency are analyzed for the vibration of the beam and corresponding conclusions are given.