Open AccessAnalysis of the loading of the gear casing of an electric locomotive provided that the bolts fastening it to traction motor are loosened
Author(s) -
Anatoly G. ANDRIEVSKY,
Е А Чабан,
В. В. Москвичев
Publication year - 2021
Publication title -
izvestiâ peterburgskogo universiteta putej soobŝeniâ
Language(s) - English
Resource type - Journals
eISSN - 2658-6851
pISSN - 1815-588X
DOI - 10.20295/1815-588x-2021-2-201-210
Subject(s) - casing , structural engineering , bearing (navigation) , workbench , finite element method , engineering , statics , traction (geology) , adina , main bearing , mechanical engineering , computer science , crankshaft , physics , classical mechanics , artificial intelligence , visualization
Objective: To study the dependence of the numerical values of the bearing reactions occurring in the bolted fasteners of the gear casing (GC) on the conditions of its fastening to the traction motor. To show the resulting redistribution of the bearing reaction values in the case of the lack of load bearing in one or two bolted fasteners from the three existing design ones. To calculate the equivalent stresses that appear in the gear casing structure under various abnormal conditions of its fastening to the traction motor under static loading. Methods: The equations of statics were used for the spatial system of forces, including three vertical bearing reactions and the weight of the casing itself. To study the stress-strain state of the casing in the case of its static loading, the nite element method was used, implemented in the ANSYS Workbench software package. Results: The cause of damage to the GC during operation has been found associated with its design aws. Calculation formulas have been obtained for determining the vertical bearing reactions of the GC. The need to take into account the GC loading in the case of redistribution of loads due to the loosening of its fastening bolts has been found. The need to improve the design of the gear casing has been indicated. Practical importance: The probable cause of damage to the GC during operation has been found. A method is proposed for assessing the GC loading in the case of redistribution of loads between its bearing points.