Optimization of the truss beam. Verification of the calculation results

Vatulia, Glib; Komagorova, Sophia D.; Pavliuchenkov, Mykhailo

doi:10.1051/matecconf/201823002037

Cited by 48 publications

(29 citation statements)

References 2 publications

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“…5). The optimal number of elements of the model is determined by the graphicalanalytical method [16][17][18]. The number of grid elements is 374,143, nodes -125,817, the maximum aspect ratio -432.78, the percentage of elements with an aspect ratio of less than 3 -7.71, more than ten -32.9.…”

Section: Computer Simulation Resultsmentioning

confidence: 99%

Determination of the dynamic load of the carrying structure of the hopper wagon with the actual dimensions of structural elements

Fomin

Lovska

Skok

et al. 2021

TAPR

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The object of research is the supporting structure of the pellet wagon with the actual dimensions of the supporting elements. One of the most problematic areas is the determination of the indicators of dynamics and strength of the supporting structure of the hopper wagon with the actual dimensions of the structural elements. A study of the dynamic loading of the supporting structure of the hopper wagon was carried out. At the same time, the actual dimensions of the structural elements were determined by means of field studies. Mathematical modeling of the dynamic loading of the load-carrying structure of a hopper wagon with the actual dimensions of structural elements was carried out by means of mathematical modeling. The studies were carried out in a flat coordinate system. The presence of three degrees of freedom of the supporting structure of the hopper wagon was taken into account: vibrations of twitching, bouncing and galloping. Differential equations were solved in the MathCad software package. In doing so, they were reduced to the Cauchy normal form, and then integrated using the Runge-Kutta method. It was found that the maximum value of the acceleration acting on the supporting structure of the hopper wagon is 38.5 m/s2, which is 2.7% higher than the acceleration of the supporting structure with nominal dimensions. Computer simulation of the dynamic loading of the supporting structure of the hopper wagon was carried out. The calculation was carried out using the finite element method in the SolidWorks Simulation (CosmosWorks) software package. It was found that the maximum accelerations are concentrated in the middle part of the supporting structure of the hopper wagon and amount to 36.2 m/s2. The F-criterion was used to verify the developed model. The calculations showed that the calculated value of the criterion is Fc = 1.09 and is less than the table value Ft = 3.29. The adequacy hypothesis is not rejected. The natural frequencies and vibration modes of the hopper wagon supporting structure were determined. It has been established that the values of natural vibration frequencies of the hopper wagon bearing structure with the actual dimensions of the structural elements are within the permissible limits. The research will contribute to the creation of relevant developments to extend the service life of wagons that have exhausted their standard resource, as well as to increase the efficiency of railway transport operation.

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Section: Computer Simulation Resultsmentioning

confidence: 99%

Determination of the dynamic load of the carrying structure of the hopper wagon with the actual dimensions of structural elements

Fomin

Lovska

Skok

et al. 2021

TAPR

View full text Add to dashboard Cite

show abstract

“…In this case, the finite element method was used, which is implemented in the SolidWorks Simulation (CosmosWorks) software package [16][17][18][19]. When compiling the finite element model, spatial tetrahedrons were used [20][21][22][23][24]. To determine the optimal number of elements, the graphic-analytical method was used [25][26][27].…”

Section: Results Of Determining the Strength Indicators Of The Load-bmentioning

confidence: 99%

Study of Loading of the Load-Bearing Structure of Hopper Wagons on Y25 Bogies

et al. 2021

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To increase the efficiency of using railway transport, the possibility of using new designs of bogies, for example, Y25 under "wide gauge" wagons was considered. In order to substantiate the proposed solution, mathematical modeling of the dynamic loading of the hopper wagon Y25 bogies was carried out. A hopper wagon for the transportation of pellets and hot sinter model 20-9749 built by the State Enterprise "Ukrspetsvagon" (Ukraine) was chosen as a prototype. The simulation results showed that the use of Y25 bogies for hopper wagons allows to reduce the acceleration of its load-bearing structure, in comparison with the use of conventional 18100 bogies, by 36 %. Other performance indicators are also significantly improved. The use of Y25 bogies for hopper wagons with actual parameters allows to reduce the acceleration of its load-bearing structure, in comparison with the use of conventional 18100 bogies, by 28 %. The determination of the main indicators of the strength of the bearing structure of the hopper wagon Y25 bogie was carried out. The calculation was carried out in the SolidWorks Simulation software package (CosmosWorks), (France), which implements the finite element method. The calculations showed that the maximum equivalent stresses in the load-bearing structure of a hopper wagon with nominal parameters are 17 % lower than the stress acting in the load-bearing structure of a wagon on bogies 18–100 V of the load-bearing structure of a hopper wagon with actual parameters, the maximum equivalent stresses are 12 % lower per voltage in the load-bearing structure on bogies 18100. The conducted research will help to reduce the load on the load-bearing structures of hopper wagons in operation, improve the dynamics and strength indicators, as well as their service life

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“…In determining the number of grid elements, the graphanalytic method was applied [15][16][17]. Ten-node isoparametric tetrahedra were used as finite elements.…”

Section: Computer Simulation Of the Dynamic Load And Strength Of The mentioning

confidence: 99%

Establishing patterns in determining the dynamics and strength of a covered freight car, which exhausted its resource

Fomin

Lovska

2020

EEJET

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Optimization of the truss beam. Verification of the calculation results

Cited by 48 publications

References 2 publications

Determination of the dynamic load of the carrying structure of the hopper wagon with the actual dimensions of structural elements

Determination of the dynamic load of the carrying structure of the hopper wagon with the actual dimensions of structural elements

Study of Loading of the Load-Bearing Structure of Hopper Wagons on Y25 Bogies

Establishing patterns in determining the dynamics and strength of a covered freight car, which exhausted its resource

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