Research on the stability and first passage of two Degreefreedom airfoil model subject to stochastic parametric ezcitation

摘要：

One two-degree-of-freedom airfoil stochastic nonlinear dynamical model in incompressible flow is proposed. The Hamilton function has also been described as one dimension diffusion process by utlizing stochastic average method of quasi-nonintegrable Hamiltonian system, the global stochastic stability has also been studied by applying the boundary classification associated with diffusion process respectively. The backward Kolmogorov equation and the General Pontryagin equation are established to research the influence of the systems energy to the airfoils safety. The numerical results showed system reliably changed faster near the edge of the safety areas, and the initial condition far away the edge can postpone the peak time of first passage probability densities function. Further more; the increasing noise intensity can cause the systems reliability decreasing faster and the raises of the peak of the first passage probability densities.

关键词： airfoil reliability Stochastic stability fist passage

作者: GeGen WangHongli Xujia

作者单位: School of Mechanicas, Tianjin University, Tianjin,300072, PR China

会议类型: 国际会议

会议名称: 2008 National Academic Symposium for Ph. D. Candidates and Tri-University Workshop on Aero-Structural Mechanics & Aerospace Engineering(NASPCTUWMAE2008)(2008年国际航天航空工程会议暨2008年博士生学术会议(力学))

会议地点: 北京

会议语种:英文

页码: 1-6

在线出版日期: 2008-10-23（万方平台首次上网日期，不代表论文的发表时间）