Shevchenko N. Substantiation of the main parameters of wood trucks and trailers with technical and operational criteria.

Object of research - process of transporting of wood by a wood trucks and trailers, that perceive external influences from the side of highway and driver. Purpose - a ground of main parameters of wood trucks and trailers is for the increase of indexes of their technical and operational properties on the basis of approach of the systems and multicriterion optimization. Methods of research - basic principles of dynamics of vehicles, methods of multicriterion optimization and numerical methods of solving of the systems of differential equalizations, are applied in theoretical research. Model experiments and their analysis are conducted by means of the methods of experiment planning and mathematical statistics. Scientific novelty. The generalized mathematical model of forward motion of wood trucks and trailers is first worked out on the base of triaxial cars of an increased communication of 5th and 6th classes, that, unlike present, gave an opportunity to examine forward motion taking into account the vertical vibrations of car-tractor and turning vibrations in a transmission for the variable rate of movement that considerably approximates results to the real terms of work. Complex indexes are first applied for multicriterion optimization of main parameters of wood-transport autotrains, taking into account the routes of transportation of wood. First drawn on the results of the design of dynamic processes in the knots of car-tractor for analytical description of technical and operational criteria of optimization and analytical dependences of dynamic indexes, motion smoothness, capasity mode of transmission aggregates, transport productivity and fuel economy from the main parameters of wood trucks and trailers. The main parameters of wood trucks and trailers are offered on the stage of planning and modernisation and forming on the enterprises of autotrains of optimal capasity, to provide the biggest transport productivity, high hauling-speed indexes and to decrease expenses of fuel, taking into account travelling terms. Industries: Forestry, motor industry.