VESTNIK of Samara University. Aerospace and Mechanical EngineeringVESTNIK of Samara University. Aerospace and Mechanical Engineering2542-04532541-7533Samara National Research University893310.18287/2541-7533-2021-20-2-83-96Model for evaluating the end runouts of a rotor with parallel connections of partsGrachevI. A.<p>Postgraduate Student of the Department of Engine Production Technology</p>grachmalek2602@gmail.comKudashovE. V.<p>Postgraduate Student of the Department of Engine Production Technology</p>KEV-fantom@yandex.ruBolotovM. A.<p>Candidate of Science(Engineering), Associate Professor of the Department of Engine Production Technology</p>maikl.bol@gmail.comPronichevN. D.<p>Candidate of Science(Engineering), Associate Professor of the Department of Engine Production Technology</p>pronichev2008@rambler.ruSamara National Research University0907202120283960907202109072021Copyright © 2021, VESTNIK of Samara University. Aerospace and Mechanical Engineering2021<p>The existing methods for calculating the assembly dimensional chains of aircraft engine rotors are analyzed. The factors that have a significant impact on the reliability of the calculation of the controlled assembly parameters of the product are identified. One of these factors is the existence of parallel connections of parts in the rotor. In the drum disk rotors, parallel rotor connections are formed by mating their parts along several end surfaces in the axial direction. A mathematical model is proposed that allows taking into account the parallel connections of the rotor parts. The form of relationship between rotor end run-outs and amplitudes of deviations of the shape of the mating surfaces of the parts and their angular positions in the unit is determined. The determined dependence includes many coefficients that allow taking into account the amplitudes of deviations of the shape of the mating surfaces, parallel connections of parts in the rotor, and their angular position. Determination of dependence coefficients values is solved as a problem of regression analysis. The initial data for obtaining the dependence are formed using the developed parameterized finite element model (FEM) of a part of the rotor of an aircraft engine high-pressure compressor (HPC). The results of research of end run-outs of control surfaces of disks of the considered HPC rotor assembly part are presented. 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