The paper deals with mathematical modelling of dynamic response of the electric locomotive wheelset drive caused by short-circuit traction motor torque. The individual wheelset drive is composed of five subsystems - rotor of the traction motor with driving gear, driven gear, stator of the traction motor with gear housing, hollow graduated shaft with clutches and wheelset. The couplings between subsystems are linearized in dependence on longitudinal creepage and locomotive forward velocity before sudden short-circuit in the asynchronous traction motor. In comparison with previous models of the wheelset drives, the rotor of the electromotor is characterized by flexible shaft suppported on flexible rolling-element bearings. The sheet metal packjet of cylindrical shape is connected by parallel cooper bars with two short circuit rings. In conseqquence of strong excitation an interruption of gear mesh can be observed. This nonlinear effect and dynamic load of individual wheelset drive with large number of DOF is investigated using the condensed mathematical model created by model synthesis method. and Obsahuje seznam literatury
The study is the first attempt to map putting on stage of Mozart’s operas and singspiels in Bohemia from the late 1780s till 1900 outside Prague. It focuses on theatre troupes that included Mozart’s pieces in their repertory, on their directors and singers, as well as the places, where they performed. The information is drawn from such sources as archival official documents, collections of theatre posters in archive and museum collections, notes in contemporary press, contemporary theatre almanach, etc. As much as 106 performances of Mozart’s scenical pieces were found, of which the most frequent were Don Giovanni (35¥), Die Zauberflöte (32¥) and Le nozze di Figaro (25¥). With regard to the fact that the article was written within a larger research looking closely at theatre activity in the Bohemian regions in the nineteenth century, the author is convinced that the list of locations, where professional execution of Mozart’s opera could have taken place, is complete. Less guaranteed (especially in the period until the mid-nineteenth century) is the completeness of the titles performed, and their rendering – there could have been more of these.