The history of development of methods to calculate torsion vibrations of shaft power-plants is presented in the article. The contribution of the scientists from KhPI to this subject in the thirties-seventies of last century is described.
The problems, related with break of contact of turbine case with foundation, are considered. The eigentones analysis of several versions turbine-foundation-base system with different version of break of contact are made. The mathematical models and calculations are executed on the basis of finite elements method.
