DOI: https://doi.org/10.15802/stp2020/213449

DETERMINATION OF THE LONGITUDINAL LOAD OF SUPPORTING STRUCTURE OF THE FLAT CAR LOADED WITH A PIGGYBACK

O. V. Fomin, A. O. Lovska, M. I. Horbunov, Y. V. Fomina

Abstract


Purpose. This study is aimed at highlighting the features of determining the longitudinal load of the supporting structure of a flat car loaded with a piggyback under operating conditions and substantiating the possibility of using a flat car model 13-401 for transportation of piggyback. Methodology. Mathematical modeling of the dynamic loading of the supporting structure of a flat car model 13-401 loaded with a piggyback was carried out. Two schemes of interaction between the piggyback and the supporting structure of the flat car are taken into account: the lack of movements of the piggyback relative to the frame of the flat car during movement and the presence of movements of the piggyback relative to the frame of the flat car during movement. Solution of the differential equations is implemented in the MathCad software. The obtained accelerations were taken into account motion when calculating the strength of the supporting structure of the platform car. The strength calculation of the supporting structure of the platform car was carried out. Obtained accelerations are taken into account to calculate the strength of supporting structure of the flat car. Findings. Based on the mathematical modeling of the dynamic loading of supporting structure of the flat car, it was found that in the absence of piggyback movements relative to the flat car frame, the maximum acceleration was 32 m/sec2. If the piggyback moves relative to the flat car frame, the maximum acceleration acting on the supporting structure is about 40 m/sec2, and about 42 m/sec2 on the piggyback. The main strength indicators of the supporting structure of the flat car are determined. It was established that the maximum equivalent stresses in this case arise in the cantilever parts of the center sill and are about 315 MPa, that is, do not exceed the permissible ones. The maximum displacements in the structure nodes are 2.6 mm, the maximum deformations are 2.5 ∙ 10-2. Originality. The mathematical model of the dynamic loading of supporting structure of a flatcar loaded with a piggyback is improved. At the same time, the rigid piggyback fastening to the flat car frame, as well as the flexible one, is taken into account. For the first time, a computer model has been developed to determine the strength of the supporting structure of a flat car during the piggyback transportation. The model makes it possible to determine the strength main indicators of supporting structure with its longitudinal loading. Practical value. The conducted studies allow us to conclude that the transportation of piggyback on the flat car model 13-401 is possible. The results of the studies will contribute to the creation of recommendations on the flat car design for piggyback transportation, and can also be useful developments when creating removable means of piggyback transportation.


Keywords


flat car; supporting structure; dynamic loading; strength; piggyback transportations

References


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Fomin, O., Lovska, A., Masliyev, V., Tsymbaliuk, A., & Burlutski, O. (2019). Determining strength indicators for the bearing structure of a covered wagon's body made from round pipes when transported by a railroad ferry. Eastern-European Journal of Enterprise Technologies, 1(7(97)), 33-40. DOI: https://doi.org/10.15587/1729-4061.2019.154282 (in English)

Fomin, O., Gerlici, J., Lovskaya, A., Kravchenko, K., Prokopenko, P., Fomina, A., & Hauser, V. (2018). Research of the strength of the bearing structure of the flat wagon body from round pipes duringtransportation on the railway ferry. MATEC Web of Conferences, 235, 1-5. DOI: https://doi.org/10.1051/matecconf/201823500003 (in English)

Fomin, O., Kulbovsky, I., Sorochinska, E., Sapronova, S., & Bambura, O. (2017). Experimental confirmation of the theory of implementation of the coupled design of center girder of the hopper wagons for iron ore pellets. Eastern-European Journal of Enterprise Technologies, 5(1(89)), 11-18. DOI: https://doi.org/10.15587/1729-4061.2017.109588 (in English)

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Yildiz, T. (2019). Design and Analysis of a Lightweight Composite Shipping Container Made of Carbon Fiber Laminates. Logistics, 3(3), 1-20. DOI: https://doi.org/10.3390/logistics3030018 (in English)


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