Nonlinear Dynamics of a Slender Flexible Cylinder in Axial Flow
.The stability and nonlinear dynamics are studied for a slender flexible cylinder subjected to axial flow. A nonlinear model is presented, based on the corresponding linear equation of motion, for dynamics of the cylinder supported at both ends. The nonlinear terms considered here are the quadratic viscous force and the additional axial force induced by the lateral motions of the cylinder. Using twomode discretized equation, numerical simulations are carried out for the dynamical behavior of the cylinder to explain, with this relatively simple nonlinear model, the flutter instability found in experiment. The results of numerical analysis show that at certain value of flow velocity the system loses stability by divergence, and the buckled configuration becomes unstable at higher flow leading to post-divergence flutter. As the flow velocity increases further, the system is restabilized in the buckled configuration prior to another dynamic instability at higher flow.
nonlinear dynamics cylinder axial flow
J. D. Jin N. Li Z.H. Qin
Department of Aeronautical and Astronautical Engineering,Shenyang Aerospace University, Shenyang 110136, P. R. China
国际会议
合肥
英文
761-765
2011-09-23(万方平台首次上网日期,不代表论文的发表时间)