Abstract
The paper focuses on the presentation of a single-track dynamic model of articulated bus, a simplified linear model, which is based on reducing the double-track dynamic model with suitable assumptions that the front body lateral accelerations and rotational angles of the articulated bus are small. On the other hand, the phenomena of friction and interstice, such as articulated system (fifth wheel), are neglected. A coordinate system is defined to precisely describe the translational and rotational motions of the vehicle. In details, the author provides the dynamics model, sets up the kinematics and dynamic relations and builds differential equations of kinematic parameters presenting the articulated bus motions. These are objective functions, which are necessary to determine the gravity centre trajectory of the articulated bus, movement of the joint system and bodies of vehicle in addition to the swept path width of articulated bus. Matlab-Simulink is used to solve mathematical problems and simulate responding dynamics of vehicle. The modelling results are the functions of kinematic and dynamic parameters that allow to determine the motional trajectory and the swept path width of articulated bus, joint system and bodies of vehicle. These suitable results represent the fundaments for exact evaluation of the dynamic model and investigation of dynamics of articulated bus at a higher and more complex level.
Highlights
Nowadays, roads are becoming more and more congested, with increasing economic losses due to delays resulting from traffic jams and road accidents
The dynamics of articulated bus in stable conditions when turning on curved line without break forces shown in the figure above
The article presents the trajectory of tractor-semitrailer on a singletrack linear model with appropriate assumptions
Summary
Roads are becoming more and more congested, with increasing economic losses due to delays resulting from traffic jams and road accidents. Such problems may be reduced by using public transport systems. Many types of public transport are in use, subways, trams and buses being the most common. Each type has its advantages and disadvantages Articulated buses with their advantageous features in carrying capacity, transport productivity and reduction of transport costs have been exploited effectively. Traffic safety of the above mentioned vehicle type should be improved and this topic is outlined in our specific study. The mathematical study of the motion trajectory can contribute to the safety of articulated buses
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