Eventos Anais de eventos
DINAME 2017
XVII International Symposium on Dynamic Problems of Mechanics
Modelling and simulation of the rolling dynamics of a tractor-trailer truck vehicle
Submission Author:
Flávio Trigo , SP
Co-Authors:
Ricardo Sampaio, Flávio Trigo
Presenter: Flávio Trigo
doi://10.26678/ABCM.DINAME2017.DIN17-0220
Abstract
In this work, a 6 degree-of-freedom analytical model that describes the rolling dynamics of an articulated heavy-duty vehicle composed by a tractive (tractor) unit and a trailer unit was developed and numerically simulated. The behaviour of a typical medium-duty truck-trailer set was evaluated in two common traffic manoeuvres, namely, performing a constant steering wheel angle curve and a change of direction, both at constant velocity (36 km/h). In the latter case, in order to simulate a sudden change, steering amplitude ranging from zero to 30 degrees was imposed to the front wheels through a step function during 2 seconds. Results of the first trial revealed that the tractor roll angle presents a peak of 2.6 degrees and achieves a steady value of 0.8 degree respectively at 4 and 20 seconds after the beginning of the manoeuvre. Roll angle amplitudes of the trailer, spanning from -0.015 to 0.023 degree (a negative value means the vehicle is leaning inwards at the curve), revealed an oscillatory characteristic, before reaching a stable value of 2.5x〖10〗^(-3) degrees in about 15 seconds. In the second trial, roll angles of both tractor and trailer reach maximum values higher than those of the previous test (respectively 11.5 and -0.5 degrees); in addition, the oscillatory movement of the trailer was enhanced, since positive and negative roll angles alternated five times until both units return to a steady (zero roll angle) condition after about 20 seconds from the beginning of the manoeuvre. Those results are compatible with the expected behaviour of actual vehicles, thus suggesting that the proposed model can be tailored to include other truck-trailer configurations and manoeuvres.
Keywords
Lateral dynamics, modelling and simulation of articulated vehicles, multibody system dynamics, Vehicle Dynamics, roll dynamics
