Simulation Research On The Heavy Semitrailer Towing Vehicle Based On ADAMS/CAR

With the development of economy and the improvement of road transportation, trailer truck with its unique any shortage transport, section of transport, ro-ro transport advantage, has become the major form for our roadtransport and the long-distance transport. The semi-trailer has gradually changed from the original dual axis to three- axis or even five-axis development, from light to medium-sized, heavy-duty development, developed to meet the growing demand for transport logistics industry. Tractor Trailer will be the basic transport unit in roadtransport is an inevitable trend. So the trailer can cause what kind of impact on the performance of the tractor, has become an important research direction, this paper, Models of the towing vehicle and the trailer based theory of the virtual towing vehicle had built, and to put to a same kind test based on an initial condition, which was concluded.Firstly, the theoretical analysis, derived some basic properties of tractor semi-trailer and the parameters of calculation, dynamic parameters can be calculated by the vehicle dynamic characteristic diagram, you can also calculate according to the relationship of torque and speed, or solved directly according to the equilibrium equation of driving force - resistance, so that,the parameters used to study the dynamic characteristics of the trailer would be affected. In addition, a dynamic model was set up in the ADAMS in order to research the heavy tractor semi-trailer stability. The behavior of the heavy tractor semi-trailer was simulated in the ADAMS by Step Steer, Impulse Steer and Steer Release. Stability test shows that the vehicle of virtual prototyping model can make rapid and correct response with designated input, and the errors of related dynamic parameters are small. The model can be used to analyze the motion state on other conditions.The simulation results show that the vehicle dynamic model can receive the vehicle response very well. The trailer has some effect on the towing vehicle, so it is benefit to the research of the heavy tractor semi-trailer stability.