THREE-ELEMENT BOGIE SIDE FRAME STRENGTH
DOI:
https://doi.org/10.15802/stp2017/92535Keywords:
side frame, three-piece bogie, strength, test, calculation, supportAbstract
Purpose. To evaluate the effect of different loads on the stress-strain state of the freight car bogie side frame, as well as to evaluate the distribution of the stress fields in the design of the freight car bogie side frame supported through the horizontal surface and through the horizontal and inclined surfaces of the pedestal opening. Methodology. A volumetric finite element model of the side frame of ZK-1 bogie of the freight car was designed. The forces under the current regulatory documentation for theoretical research were applied to the model, the stress arising in the model elements were determined. The static tests of ZK-1 bogie side frame were conducted; they allowed determining the stresses in the key points of the frame under the action of forces in accordance with the existing procedure of static tests of the freight car bogie side frame. To check the quality of the finite element model we determined the stress in the model under the action of forces corresponding to the static requirements. The corresponding coefficients were determined to match the stress obtained through theoretical studies and static tests. The results of theoretical and experimental studies of stress for dangerous sections of the side frame design were compared. Findings. The regulatory documentation for carrying out experimental research of the side frame strength does not fully take into account the load acting on the frame during its operation and that provided while assessing the side frame strength theoretically. The strength evaluation of the side frame by the results of field tests only does not give a complete picture of the distribution of stress fields, as the provided sensor installation points do not cover most of the design elements with possible stress concentration. Originality. The loads applied to the side frame during theoretical and experimental studies were compared to the loads acting during operation. The impact of use of inclined surfaces in the pedestal box opening was evaluated. Practical value. The obtained results allow the more accurate assessment of the three-piece bogie side frame strength, as well as allow you to choose the more preferred method of side frame support in the axle box.
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