Simulation modelling of the rolling stock axle test-bench

Ракша, С. В.; Anofriev, Pavlo G.; Kuropiatnyk, Oleksii S.

doi:10.1051/e3sconf/201912301032

Cited by 4 publications

(2 citation statements)

References 4 publications

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“…The obtained understanding of the processes of soil puncture made it possible to establish the calculated dependences for determining the components of the soil resistance forces from the advance of the tip in the massif -the frontal resistance (12) and the lateral force (14). As the calculations of the frontal resistance of the soil puncture have shown (Fig.…”

Section: Discussion Of the Results Of The Study Of The Process Of Controlled Soil Puncture With An Asymmetric Conical Tipmentioning

confidence: 99%

“…However, calculations of the size of the soil compaction zone around the well are not given. The need to take into account soil compaction when laying a route near underground structures and utilities is also considered in [12]. But the determination of the forces acting on nearby communications from the elastic state of the soil during its compaction with an asymmetric tip is irreducible.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

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Determination of the regularities of the soil punching process by the working body with the asymetric tip

Kravets¹,

Suponyev

Shevchenko

et al. 2021

EEJET

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The presence of analytical dependencies describing the process of static soil puncture by a working body with a conical asymmetric tip is necessary to create installations with the ability to control the trajectory of the soil puncture. The paper considers the features of the process of interaction of an asymmetric conical tip with the ground. Analytical relationships were obtained to determine its reactions during a static puncture, the deviation of the head trajectory from a straight line, to determine the size of the soil compaction zone and the magnitude of the destructive force that acts on adjacent communications and other underground objects. It was found that with an increase in the value of the displacement of the top of the cone, for example, from its axis from 0.02 m to 0.08 m with a borehole diameter of 0.2 m, the value of soil resistance increases almost four times. The greatest resistance is achieved when piercing a hard sandy sand. It was found that with an increase in the displacement of the tip of the tip cone, the deviation of the trajectory increases. The piercing head achieves the greatest deviation from the straight trajectory of movement with a sharper cone and a greater asymmetric deviation of its top, and, for example, in hard sandy loam can be up to 0.17 m with a span of 10 m. It was found that the size of the soil destruction zone will be almost 1.8 times larger than the tip in the form of a symmetrical cone and reaches from 8 to 12 borehole diameters, depending on the type of soil. The maximum pressure on adjacent objects can reach from 0.06 MPa in hard-plastic clay to 0.09 MPa in hard sandy loam. The calculated dependences obtained for determining the power and technological parameters depending on the geometric dimensions of the asymmetric tip of the working body can be used to create installations with a controlled static puncture for use in the most common soil conditions.

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Section: Discussion Of the Results Of The Study Of The Process Of Controlled Soil Puncture With An Asymmetric Conical Tipmentioning

confidence: 99%

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Determination of the regularities of the soil punching process by the working body with the asymetric tip

Kravets¹,

Suponyev

Shevchenko

et al. 2021

EEJET

View full text Add to dashboard Cite

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Stand for accelerated tests of rail vehicles wheelsets

Ракша

Anofriev

Kuropiatnyk

2020

IOP Conf. Ser.: Mater. Sci. Eng.

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Tests and research can be greatly accelerated by applying a multi-point load to the test wheel. The aim of this work is to substantiate rational parameters of the stand for accelerated life tests of railway wheelsets, in which a multi-point load applies to the rolling surface of the test wheel. On the basis of the laws of the theory of elasticity, we performed analytical calculations of the contact stresses created by the rolling bodies of the load mechanism of the test stand. Research has shown that the dependence of the contact stresses on the wheel rolling surface on the ball’s diameter is nonlinear. The decrease in stress is due to an increase in the contact area. We obtained the analytical and graphical dependencies, which make it possible to evaluate the influence of the parameters of the stand for accelerated life tests of railway wheelsets on contact stresses on the wheel rolling surface, taking into account the shape and dimensions of this surface. The authors have proposed a stand design for accelerated life tests of railway wheelsets. The use of a stand with the parameters justified in this work will reduce the test duration by 10-15 times.

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Analytical method of determining the movement resistance of a tip for forming rectangular technological hole in the lower structure tracks

Posmitiukha

Hlavatskyi

Kravets

et al. 2020

IOP Conf. Ser.: Mater. Sci. Eng.

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The aim of this work is to theoretically determine the total resistance to soil pricking with a wedge-shaped tip to create a rectangular cavity and to determine the influence of the size of the working equipment and soil environment in the repair of earthenware or areas where trench technology can-not be used. To determine the forces of the recess of the replaceable pilot, the law of change of soil pressure on the working surfaces of the working equipment was first determined, which is based on the idea of the change of the soil elastic state at its compaction was determined, which is determined by the compression module of deformation of the soil. The processes occurring during the formation of wells and new approaches to the improvement of calculations have been described. On the basis of the pro-posed model of the piercing process, the laws of change of the normal pressure of soil resistance on the surface of the wedge working equipment are established. Based on its value, the results of theoretical studies have received a rational form and parameters of the tip of the work equipment.

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Simulation modelling of the rolling stock axle test-bench

Cited by 4 publications

References 4 publications

Determination of the regularities of the soil punching process by the working body with the asymetric tip

Determination of the regularities of the soil punching process by the working body with the asymetric tip

Stand for accelerated tests of rail vehicles wheelsets

Analytical method of determining the movement resistance of a tip for forming rectangular technological hole in the lower structure tracks

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