Polyah A. The improvement of using the average resource of contact line supports on direct-current electrified transport.

Dissertation is dedicated to the improvement of the average resource of a contact line support by improving the method of vibroacoustic diagnosis with a new diagnostic parameter x (difference of frequency spectrum with a maximum amplitude). The author gave the analysis of maintenance, features of work of contact line's supports, analysis of modern methods and diagnostic devices that can estimate the state of contact line's supports. A lot of causes that influence on the average resource of contact line supports of the electrified transport on the different stages are investigated. It's explored the influencing of bearing-out of metal' ions to electro-corrosion; it's done the probabilistic-statistical processing of thickness of walls of the given party of supports СК 13.6-02.8жд. The choice of diagnostic parameter is validated. Probabilistic nature of diagnostic parameter is explored (for supports in working condition and for defective ones). The author gave the analytical expression for determination the maximum value of the offered diagnostic parameter during determination of diagnosis. This expression takes into account the specific of loading and destruction of contact line's supports of railway transport during their maintenance. It's calculated the necessary number of measurements for a new diagnostic method. A hardware method of diagnosis and treatment program that processes diagnostic information is created. In the last part of dissertation the author gave the prediction of the average resource of contact line support using created diagnostic methods.