Research On Steering Dynamic Characteristics And Safety Assessment Of Heavy Engineering Vehicles

Heavy-duty girder transport vehicle working environment and driving and roadconditions is special and body length, so the relatively poor mobility and flexibility.Affected by road conditions, when the vehicle turns, the more serious tire wear.Automobile steering performance directly affects the vehicle’s mobility and flexibility,steering stability and use economy and the service life of tires. Therefore, it is havethe important meaning and social-economic value to research and analysis of heavyvehicle steering system. In this paper, the main research contents include:(1) Introduces the principle of ackermann steering and steering system.Automobile steering system consists of steering mechanism, steering gear andsteering linkage mechanism of three parts. Establish the multi-axle vehicle doublefront axle deflection of two degrees of freedom vehicle model. By analyzing theresults of the model, centroid position of the vehicle, tire cornering stiffness, steeringsystem and so on has certain effect on steering.(2) Analysis and calculation of the relationship between the car inside corner,outside of the steering wheel when the multi-axle steering. System introduces theoverall structure and working principle of the LYC200t transporting girder vehicle,and of its various working condition of turning to do the analysis and research.Calculates the minimum turning radius when LYC200t transporting girder vehicle fullload job.(3) Based on the assumption of elastic mechanics, the basic equation andboundary conditions are described in brief, provides a certain theoretical introducedfor finite element method. Finite element method calculation steps are divided intopre-processing stage, the finite element calculation stage, post-processing stage.Detailed introduction to the finite element software selection and unit type, and laythe foundation for the statics analysis(4) Establish LYC200t transporting girder vehicle frame model with3-Dsoftware Pro/E. Based on the structural feature of this kind of car, the finite elementanalysis was carried out on the dangerous section part alone. Of the four kinds oftypical working condition (include Bending, torsion, turning and braking) of the car atfull load stiffness and strength analysis. By comparing the results of all kinds of working condition, the safety of the frame structure is obtained.In this paper, the research work is similar LYC200t transporting girder vehiclefor such a multi-articulated steering mode combinations heavy engineering vehiclessteering design has the reference value and theoretical significance.