The method of forming and solving the equations of motion of a multicomponent mechanical system implemented in the EULER software complex was developed by specialists of the AvtoMechanika enterprise on the basis of modern methods of classical mechanics. A multicomponent mechanical system is considered as a set of solid and elastic (deformable) bodies, connected by kinematic connections and force elements, including external forces. The motion of bodies is considered in three-dimensional space in general form without any simplifying assumptions.