THE APPROXIMATE METHOD FOR EXAVATION WITH ROTORS CALCULATION IN DYNAMIC ANALYSIS

Abstract: This paper is the result of the need for dynamic analysis of certain machines for mechanization, periodically excited in the operating, and so the resonance states can appear. For the dynamic analysis, it is necessary to set the mechanical and the adequate mathematical model of construction.In the conditions of the resonant states, the damping effect is very important, and can’t be neglected. In this study, the original approximate method for solving the mathematical model, when damping is existing, is exposed, considering the real difficulties presented in the theory of the viscous friction. Although, in the first approximation, the recommendations on the main values of logarithmic decrements for certain types of the constructions, can be used t his method enables the simplified introduction of the decrements experimentally determined, in the calculation