Procedure for modeling dynamic processes of the electromechanical shock absorber in a subway car

Liubarskyi, Borys; Lukashova, Natalia; Петренко, Олександр; Yeritsyan, Bagish; Kovalchuk, Yuliia; Overianova, L. V.

doi:10.15587/1729-4061.2019.181117

Cited by 5 publications

(12 citation statements)

References 10 publications

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“…The mathematical model built, in contrast to those proposed in [2], takes into consideration the impact of track irregularities and the joint operation of shock absorbers. Applying a procedure for determining differential inductivity, the coefficient for a counteracting electromotive force, and the electromagnetic force of the shock absorber, determined by the methodology from [3], (4) to (6), makes it possible to take into consideration the geometry of the magnetic circle of the electric shock absorber and the saturation of its parts.…”

Section: Discussion Of Results Of Modeling the Work Of A Spring Suspementioning

confidence: 99%

“…As noted in [6], the E-KM series cars at PAT «Kryukiv car-building plant» (Kremenchuk, Ukraine) are equipped with new bogies, model 68-7054, with central pneumatic spring suspension, which is supplemented with hydraulic shock absorbers. The use of pneumatic springs makes it possible to adjust the parameters of damping depending on the loading of the car and the value of external influences; the pneumatic suspension, however, leads to additional energy losses and the increased power of the pneumatic system [2].…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…The analysis of different types of electromechanical shock absorbers [2] proves that among the currently known types such as induction, synchronous, electromagnetic [7], and DC [8], the most appropriate option is the latter. This type of electromechanical energy converter provides for the required constant tractive [9] (mechanical) characteristic for the electromechanical shock absorber, which changes only by the speed of the armature.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…It follows from our analysis [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] that up to now the issue has been resolved partially as demonstrated by the results obtained: the time and effectiveness of oscillation damping; the possibility of constructing a generalized mathematical model of the spring suspension in a subway car and the electromechanical shock absorber. However, the models built do not make it possible to investigate the work of electromechanical shock absorbers as part of the running gear of a subway car.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…The indicators of shock absorbers are predetermined by the type and design of the shock absorber. In terms of smooth running, the best performance is demonstrated by pneumatic shock absorbers [1]; their use, however, requires an additional pneumatic power system, compressors, which reduce the overall energy efficiency of electric rolling stock [2]. Another approach to improving the dynamic properties of electric rolling stock is the use of electromechanical shock absor bers [3].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Building a mathematical model of the oscillations in subway cars equipped with electromechanical shock absorbers

Liubarskyi

Lukashova

Петренко

et al. 2020

EEJET

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Section: Discussion Of Results Of Modeling the Work Of A Spring Suspementioning

confidence: 99%

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Building a mathematical model of the oscillations in subway cars equipped with electromechanical shock absorbers

Liubarskyi

Lukashova

Петренко

et al. 2020

EEJET

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Comparing the physical principles of action of suspension damping devices based on their influence on the mobility of wheeled vehicles

Dushchenko

Vorontsov

Masliyev

et al. 2021

EEJET

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This paper reports the comparison of two physical principles of action of suspension damping devices based on their influence on the mobility indicators for an 8×8 wheeled machine. A radical difference between these principles of action is the dependence of resistance forces on the speed of the relative movement of working bodies (internal friction: hydraulic shock absorbers) or on the relative movement of working bodies (external friction: friction shock absorbers). Widespread hydraulic shock absorbers have certain disadvantages that do not make it possible to further increase the mobility of wheeled or tracked vehicles without the use of control and recuperation systems. In turn, in friction shock absorbers, the use of new materials has eliminated many of their shortcomings and thus can provide significant advantages. It was established that the application of friction shock absorbers for a given wheeled vehicle did not significantly affect the speed compared to hydraulic ones. The main factor that prevented the implementation of the advantages of friction shock absorbers was the insufficient suspension travel. However, friction shock absorbers absorbed 1.76...2.3 times less power, which reduced the load on nodes and increased efficiency (autonomy). In addition, a more uniform load on suspensions was ensured, which improved their resource, and, due to the prevailing vertical oscillations of the suspended body over the longitudinal-angular ones, the geometric passability improved as well. The comparison of two physical principles of action of damper suspension devices in a wheeled vehicle has shown that the use of friction shock absorbers could provide significant advantages in resolving the task relates to improving the mobility and would fundamentally affect the choice of the suspension energy recuperation system if it is applied.

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Improving the damping of vehicle vibration by improving pneumatic springs

Masliyev

Dushchenko

Yepifanov

et al. 2022

EEJET

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It is known that the air suspension of vehicles, in which diaphragm-type air springs are used as an elastic element, do not provide the necessary vibration damping. The reason for this is that such air springs have a relatively large passive part. As a result, a relatively small mass of compressed air crosses through the throttle installed between the air spring and the additional reservoir. This mass of air contains thermal energy, into which the energy of vibrations, which enters through the walls of the additional reservoir into the environment, has turned. This is interpreted as vibration damping, which is insufficient due to the low air mass. Therefore, hydraulic vibration dampers are installed parallel to the diaphragm air springs, which complicates and increases the cost of the vehicle. Increasing the damping properties of such air suspensions could eliminate these hydraulic vibration dampers, which would reduce costs and simplify operation. An air suspension with an improved air spring has been proposed, which has an increased effective area and a reduced "passive" capacity, an empirical formula has been built to determine its damping coefficient, as well as an expression for the stiffness coefficient. Mathematical modeling of oscillations of vehicles with different designs of pneumatic springs was carried out in order to improve their damping. The mathematical model takes into account the change in the parameters of the air spring during vibrations. The study was carried out for the diesel train DL-02. Using mathematical modeling, the effectiveness of the air suspension with an improved air spring has been proven: its damping index reaches 0.263, and the vibration damping coefficient is 45,859 kg/s, which corresponds to the values recommended for vehicles.

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Procedure for modeling dynamic processes of the electromechanical shock absorber in a subway car

Cited by 5 publications

References 10 publications

Building a mathematical model of the oscillations in subway cars equipped with electromechanical shock absorbers

Building a mathematical model of the oscillations in subway cars equipped with electromechanical shock absorbers

Comparing the physical principles of action of suspension damping devices based on their influence on the mobility of wheeled vehicles

Improving the damping of vehicle vibration by improving pneumatic springs

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