AIRCRAFT AND ROCKET ENGINE DESIGN AND DEVELOPMENT MODAL ANALYSIS OF DYNAMIC ROTOR SYSTEMS

摘要

We developed modal analysis methods to solve problems of rotor dynamics that make it possible to significantly reduce necessary computer and time resources. We considered algorithms that take into account variations in the inertial parameters of dynamic rotor systems, rigidity characteristics, gyroscopic and damping forces. We proposed an algorithm to consider axial forces acting in rotor systems. A number of requirements are imposed on mathematical models that can be used to simulate dynamic systems of rotors, and these requirements must be met to achieve success in realizing the problem stated. Among these requirements is the capability to solve with minimum expenditure the wide scope of problems in calculating rotor systems having a large number of degrees of freedom. The mathematical models must precisely represent their elastic and inertial properties, connections of elements and to take into account different modes of oscillations, operating conditions and loads.