Grzadziela A.

The application of vibration analysis methods in naval technology has been presented in the paper. This element of Base Diagnosing System (BDS) is accepted and used in the ships, which are powered by the COGAG power plant. Application of computer simulation for diagnosing a technical state of gas turbines rotor sets should be applied during calculation and project process. In fact it is acted. A problem is started when the producer does not include this kind of know-how in the technical specification for user. Such situation steps out for the export objects like navy vessels equipped with gas turbine engines. The dynamic problems of Marine Gas Turbine Engines (MGTE) are connected with such basic elements: rotors, bearings, struts of bearings, engine body, type of substructure, hydro- and meteorological conditions during sea trials and gas flown parameters inside the engine. The quality of work process and stability of MGTE are connected with the state of such parameters as well. Dissipation of energy in rotating machines displays as a torque, revolutions, temperature, gas flown and vibration. Vibrations are connected to: rotors unbalancing, oversize of tolerated axis slope of shafts, abrade of blade tips with the inner roller, wear of axis and radial bearings, asymmetry of springiness and damping characteristics of rotor and their parts and irregularity gas flown forces. Emission of vibration brings a lot of information including opinion of the technical state. Measurements of vibration, their identification, classification, mathematical analysis, including trend function bring information on actual technical state and it allows predicting wear process in the future. The paper presents results of permanent process of measure of unbalancing. The data base and software for collection and analysing vibration parameters are presented as well.