The presented work demonstrates a study devoted to assessing the strength characteristics of the rotor elements of a promising small-sized gas turbine engine. The main feature is that the analysis of the stress-strain state of the engine rotor is carried out taking into account vibrations and resonant frequencies. In turn, the assessment of the dynamic characteristics of the rotor elements was carried out taking into account the conditions of their mutual contact. The research materials presented in this article will serve for further iterations of engine design.