Simulation of Performance of CFST Elements Containing Differentiated Profile Tubes Filled with Reinforced Concrete

Vatulia, Glib; Lobiak, Alexey; Chernogil, Vitaliy; Novikova, M. N.

doi:10.4028/www.scientific.net/msf.968.281

Cited by 11 publications

(6 citation statements)

References 11 publications

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“…The solution to the mathematical model is performed in the MathCad software package using the Runge-Kutta method [19,20]. The calculation results are given in Figs.…”

Section: Geotechnical and Mining Mechanical Engineering Machine Buildingmentioning

confidence: 99%

Feasibility study for using the fillers in the bearing structure components of a gondola car

Fomin¹,

Lovska²,

Skok³

et al. 2022

Nauk. visn. nat. hirn. univ.

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Purpose. To study the feasibility of using the fillers for the gondola car bearing structure components. This makes it possible to reduce both damage to the gondola car bearing structure components during operating modes of loading and the cost of unscheduled repairs. In addition, it can improve the efficiency of railway transport operation. Methodology. In order to substantiate the use of aluminium foam as a filler for the gondola car bearing structure components with a closed box-section, a computational modeling of loading under the most unfavorable operating mode, such as shunting collision, has been performed. Gondola car 12-757 model built at PJSC Kryukovsky Railway Car Building Works is chosen as a prototype. The calculation is performed using the finite element method implemented in the SolidWorks Simulation (CosmosWorks) software package. The fatigue strength and natural vibration frequencies of the gondola car bearing structure with a filler of its components have been calculated. The natural vibration frequencies of the bearing structure of the gondola car are calculated. The design service life of the gondola car bearing structure has been determined. The main indicators of the gondola car bearing structure dynamics have been studied. The calculation is made in a plane coordinate system. In this case, the mathematical model is solved by the Runge-Kutta method. Findings. The results of the conducted research have revealed that the use of aluminium foam as a filler for the gondola car bearing structure components contributes to reduction of their load-bearing capacity from 12 to 47% compared to the prototype wagon. Originality. The expediency of using aluminium foam as a filler of the gondola car bearing structure components by modeling its load-bearing capacity under the most unfavorable operating conditions has been scientifically substantiated. Practical value. By reducing the loading on the gondola car bearing structure, using aluminium foam as filler for its components, it is possible to increase fatigue strength, reduce the amount of damages, and, consequently, the cost of unscheduled repairs of the wagon. The conducted research can contribute to the creation of recommendations for developing the innovative rolling stock designs with improved technical-and-economic, as well as operational performance.

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“…The solution to the mathematical model is performed in the MathCad software package using the Runge-Kutta method [19,20]. The calculation results are given in Figs.…”

Section: Geotechnical and Mining Mechanical Engineering Machine Buildingmentioning

confidence: 99%

Feasibility study for using the fillers in the bearing structure components of a gondola car

Fomin¹,

Lovska²,

Skok³

et al. 2022

Nauk. visn. nat. hirn. univ.

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“…When determining the amplitude of equivalent dynamic stresses, the coefficient of the influence of side forces equal to 1.1 [28,29] was taken into consideration.…”

Section: Determining the Design Service Life Of The Bearing Structure Of A Tank Car Equipped With Y25 Bogiesmentioning

confidence: 99%

Justifying the prolongation of the service life of the bearing structure of a tank car when using Y25 bogies

Fomin

Lovska

Ivanchenko

et al. 2021

EEJET

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This paper substantiates the use of Y25 bogies under tank cars in order to prolong their service life. The reported study has been carried out for a tank car with rated parameters, as well as the actual ones, registered during full-scale research. Mathematical modeling was performed to determine the basic indicators of the tank car dynamics. The differential equations of motion were solved by a Runge-Kutta method using the Mathcad software package (USA). It was established that the use of Y25 bogies under a tank car with rated parameters could reduce the acceleration of its bearing structure by almost 39 % compared to the use of standard 18‒100 bogies. Applying the Y25 bogies under a tank car with the actual parameters reduces the acceleration of its load-bearing structure by almost 50 % compared to the use of standard 18‒100 bogies. The derived acceleration values were taken into consideration when calculating the bearing structure of a tank car for strength. The calculation was performed using the SolidWorks Simulation software package (France). The resulting stress values are 18 % lower than the stresses acting on the load-bearing structure of a tank car equipped with 18‒100 bogies. For the load-bearing structure of a tank car with the actual parameters, the maximum equivalent stresses are 16 % lower than the stresses when the 18‒100 bogies are used. The design service life of the load-bearing structure of a tank car was estimated taking into consideration the use of Y25 bogies. The calculations showed that the design service life of the bearing structure of a tank car equipped with Y25 bogies is more than twice as high as that obtained for 18‒100 bogies. The study reported here would contribute to compiling recommendations for prolonging the service life of the load-bearing structures of tank cars

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“…The system of differential equations ( 7) was solved using the Mathcad software package [21][22][23] in the form: =  . The initial movements and speeds were set to zero [24][25][26]:…”

Section: Determining the Dynamic Load On The Bearing Structure Of A Railroad Gondola With A Removable Roofmentioning

confidence: 99%

Justification of the use of square pipes in the frame of the removable roof of the open wagon

Fomin

Lovska

2021

EEJET

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This paper reports determining the basic strength indicators for the removable roof of a railroad gondola. It has been established that the typical roof design has a significant margin of safety in the components of the supporting structure. In order to reduce the roof material intensity, the reserves of its strength have been determined and optimized based on the criterion for minimal material intensity. Pipes of square cross-section have been proposed for using as the components of the roof frame. When taking into consideration the proposed measures, it becomes possible to reduce the mass of the frame of the removable roof for a railroad gondola by almost 15 % compared to the typical design. At the same time, to apply the roof on different types of gondolas, its cantilevered parts can move in a longitudinal plane. It is possible to use deflectors on the removable roof. The roof can be attached to the body in a regular way. It is also possible to fix it using shog-connections. To substantiate the proposed solution, the strength of the improved structure of the removable roof was determined. It was established that the maximum equivalent stresses in the load-bearing structure of the removable roof did not exceed permissible ones. To define the indicators of removable roof dynamics, its dynamic loading was investigated. The calculation was performed in a flat coordinate system. The oscillations in bouncing and galloping were taken into consideration as the most common types of a railroad car oscillations when running on a rail track. The mathematical model of dynamic loading was solved in the Mathcad software package (Boston, USA). The study has shown that the acceleration of the body in the center of masses is 0.4 g and is within the permissible limits. At the same time, the ride of a railroad car is excellent. The study reported here would contribute to the improvement of the efficiency of railroad transportation.

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Simulation of Performance of CFST Elements Containing Differentiated Profile Tubes Filled with Reinforced Concrete

Cited by 11 publications

References 11 publications

Feasibility study for using the fillers in the bearing structure components of a gondola car

Feasibility study for using the fillers in the bearing structure components of a gondola car

Justifying the prolongation of the service life of the bearing structure of a tank car when using Y25 bogies

Justification of the use of square pipes in the frame of the removable roof of the open wagon

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