employee
Bryansk, Bryansk, Russian Federation
Bryansk, Bryansk, Russian Federation
The aim of this work consists in choosing a rational way for the definition of selfresonant frequency in car body bending vibrations of a bilevel car. A test subject is the car body of a bilevel car of the model 61-4465 manufactured by the Company «Tver Wagon Works». The vibration tests of a bilevel car were modeled. Test results were compared to the data of actual test and a computation on the recommendations of regulations. There is developed a lamellar finite-element model of a bilevel car carcass with its stiffness corresponding to a real car body. The assessment of selfresonant frequency in car body bending vibrations was carried out on basis of three variants of its model differed with the distribution of car body gross weight: uniformly throughout the whole of metalware; throughout the parts of metalware in accordance with mass position in a real car; taking into account the influence of partition rigidity in compartments and service rooms. The comparison of modeling results with the use of models described and results of actual tests shows their satisfactory correspondence that allows approaching to dynamic values of a real car body at the investigation of its loading by the methods of computer simulation.
bilevel car, elastic car body, dynamic model, mathematic modeling, finite element, vibration test, selfresonant frequency, bending vibrations.
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