Moment Lyapunov exponents and stochastic stability of moving narrow bands

Author:

Kozić Predrag1,Pavlović Ratko2,Janevski Goran2,Stojanović Vladimir2

Affiliation:

1. Department of Mechanical Engineering, University of Niš, Niš, Serbia,

2. Department of Mechanical Engineering, University of Niš, Niš, Serbia

Abstract

Stochastic stability of narrow moving bands under random tension fluctuation is investigated within the concept of the Lyapunov exponent. The moment Lyapunov exponents and Lyapunov exponents are important characteristics determining the moment and almost-sure stability boundaries of a stochastic dynamical system. Galerkin’s method is used to reduce the partial differential equation of motion to a corresponding ordinary differential equation with randomly varying stiffness. We obtain explicit stability conditions based on the asymptotic expansion series for the moment Lyapunov exponent g(p), and the Lyapunov exponent λ for a two-dimensional linear stochastic system.

Publisher

SAGE Publications

Subject

Mechanical Engineering,Mechanics of Materials,Aerospace Engineering,Automotive Engineering,General Materials Science

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