Summary
The method for the numerical simulation of complex process of interaction between nonlinear oscillations, creep and wear in fuel rod claddings is presented. Geometrically nonlinear oscillations of the fuel rod are modelled by Galerkin and time integration methods. The cyclic creep governing equation was obtained by use of the asymptotic expansions and averaging in a period of fuel rod’s oscillations. The approach for estimating the power value of the friction forces, which vary over time in creep conditions, is proposed. The examples of the calculation results are presented.
