STRESS-STRAIN STATE OF CARGO FRAME OF A TRANSPORTER

Abstract

Standard eight-axle transporters of pit type with typical cargo frame, which are in operation now, are not suitable for transportation of large unique products because of the inability to fix them firmly. A special cargo frame has been created, which is mounted on a standard eight-axle transporter of pit type instead of a standard frame. In laden position it is placed horizontally and has 4 degree bulkiness, and in unladen position it is placed vertically and is located in the clearance of the rolling stock. Stability coefficient of unloaded structure from cross-tipping in curves is 1,96 and it is higher than the maximum permissible value of 1,8. The project was implemented by the department of railway cars and cars facilities of MIIT jointly with Kaluga Turbine Plant.

The objective of the author is to investigate stressstrain state of a cargo frame of a transporter, produced at Kaluga Turbine Plant, using finite element method, comparative and mathematical methods. For that purpose rectangular plates were taken with different geometrical characteristics, perceiving deformations of tension, compression, shear and bending in two planes. Basing on the analysis of the stress strain state of originally designed cargo frame Kaluga Turbine plant-manufacturer got recommendations for more rational distribution of the metal mass in length and cross-section, as well as a decrease in metal intensity of the spaces of the cargo frame where calculations defined very low stresses. In general, studies of stress-strain state of the cargo frame showed that it is workable, strength reliable, easy for fastening of transported products and can be safely used for regular transportation of special products on railways of Russia on the same basis in accordance with the requirements for the mass rolling stock of the car fleet.