Freight Bogie Prototype Properties Analysis by Means of Simulation Computations

Abstract

The object of this article is to analyse the stability of changed three axle rail bogie structure, which is characterized below by higher axle loads combined with good operational properties. The occasion of change was the unstable behaviour of the system during prototype development. For validation of the structure design, there has been created a substitute simulation model in program Simpack, by which the computations were performed for partial system. Model represents only elasto-kinematic properties of the system. For stability analysis of the system, there have been a set of boundary conditions from different degrees of freedom to state out of balance. Simulation calculations show, that up to one oscillation in the y-direction, which is damped in real bogie by friction in suspension and dampers Lenoir, is the system after all deflections in initial condition. Substantial unstable behaviour does not show already.

Design and strength analysis of mechanical rack system

“…The diameter of the driven friction wheel is dK = 80 mm and the rolling resistance arm ξ in the supposed diameter of the friction wheel and material of kinematic pair (steel-steel) we choose ξ = 0.5 mm. By putting the appropriate values into the equation (5) we get the amount of friction force in pulling out the mechanism FT1 = 22 N and in pulling in the mechanism the tensile force FT2 = 54.28 N. Not to slide the tubing on the surface of the wheel, one condition must be secured, i.e. the static condition of rolling (6):…”

“…In analysing the kind of metallurgical material in a certain engineering company ( Fig. 1 left) it was found out that only 25% of items are material of one item in bulk with a large turnover rate of revenues and costs [4,5]. The rest of material weighed less though their items formed 70% up to 80% of the whole items in that warehouse.…”

Modification and analyses of structural properties of a goods wagon bogie frame

“…This different design does not allow the bogie to adapt to rugged track profiles mainly because of its stiff structure. Although there are solutions allowing steering wheelsets in curves by releasing the wheelsets in guidance, but on the other side, such a design meets problems when a freight wagon passes straight sections of tracks [7,8,22]. Therefore we present the current idea of a modification of an original goods wagon bogie.…”

Dynamic loading of the tank container on a flat wagon considering fittings displacement relating to the stops

“…The increase in the volume of fluid cargo transportations towards the international transport corridors foreshows an increase in the level of demand for container-cisterns. In connection with this, there is a need to develop and put into operation new tank-containers with improved technical and economic indicators [1][2][3][4][5].…”