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Development of a Method for Defining the Torsional Stiffness of the Frame in the Initial Phase of Designing a Heavy Motor Vehicle

“…To determine the driving forces, it was necessary to calculate the characteristic masses of the aggregates. This was done using statistical data on the percentage participation of aggregate masses in the vehicle mass, as well as based on recommendations on the size of the supported mass [1,2,8,9].…”

“…A heavy motor vehicle defined by the project task is developed in further design phases, where creative and intuitive approaches that played a significant role in the project task development give way to logical and objective factors, calculations, measurements, shaping, evaluations of production and technological capabilities, etc. [1,2].…”

“…The conceptual design represents the first concretization of the project task, and its main goal is to define the parameters of the driver's ergo-sphere and the external dimensions, mass, and performance of the cargo vehicle, as well as its stylistic indicators necessary for further work on the project [1,2] heavy motor vehicle. This paper will discuss the development of a method for defining the torsional stiffness of the frame based on its transverse vibrations.…”

“…Therefore, it was deemed appropriate to calculate the equivalent height of the frame for the analysis of transverse vibrations based on the mass balance. Namely, it is recommended in [1,2] that the frame of the vehicle should account for 11-15% of its mass. Since it is a lighter heavy motor vehicle, it will be assumed that this share is 12%, which means that the mass of the frame is 840 kg.…”