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Stability condition of the tractor trailer vibration

Holka H.

Journal of Polish CIMAC

2011

Vol. 6, no 3

43-48

An important problem connected with the dynamics of vehicles are transverse vibrations of transport aggregates such as tractor, truck-trailer. This is of big importance as the discussed units are achieving higher and higher speeds, thereby posing hazard to traffic safety, besides, it is worth knowing the nature of these vibration, that is, whether they are forced or self- excited. The above mentioned issue was given much attention, in the former Soviet Union countries, and also later, [1], [2], [4]. In work [5], vibrations of a trailer whose connection to the truck or tractor by a rotary joint with one degree of freedom , was studied. However, it was a certain simplification of the real system , therefore, in this work a connection with two degrees of freedom has been introduced. The equation of motion have been derived and then the influence of the system parameters on the trailer vibration have been analyzed. The investigation showed that stability of the system is determined mostly by the damping.