Mathematical and s-models of cargo oscillations during movement of bridge crane

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

doi:10.29202/nvngu/2019-2/16

Cited by 7 publications

(8 citation statements)

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“…However, the con clusions made in the article concerned only the photovoltaic system, the indicators of which depend on the season, weather conditions and other constituents, which stipulate certain lim itations of this study. Similar conclusions can be made by ana lyzing other station types, for example [3,4] devoted to the study of the possibility of rapid charging of EVs from alterna tive sources. The established indicators require additional in spections during the operation of the stations.…”

supporting

confidence: 68%

“…It is calculated the minimum number of posts that must be arranged at the traction battery repair section, which would satisfy an average of 90 % of clients. We will gradually increase the number of posts for repairing the traction battery and cal culate all performance indicators for such a service system (1)(2)(3)(4)(5)(6). At the same time, we find the optimal number of posts, which reaches the maximum net income, calculated by the (5).…”

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confidence: 99%

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On determining productive capacity of EV traction battery repair area

Koriashkina¹,

Deryugin²,

Fedoriachenko³

et al. 2019

NVNGU

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Purpose. To ensure the effective functioning of the area for diagnosis and repair of tractive electric vehicle (EV) battery by determining the technical and economic indicators of the production capacity of the enterprise. Methodology. Modelling the process of repairing section of the EV traction battery is performed using the main principles of the queuing system, the graph theory. While calculating the probabilitytime characteristics and determining the production ca pacity of the site, the methods of mathematical statistics and probability theory were involved. findings. With the use of systematic approach, the EV market in Ukraine and the dynamics of the demand over the past three years have been studied. There was collected and analyzed information about issues related to the EV operation, and the most common ones were identified. Empirically, there was obtained an estimate for the duration of the process of repairing and replac ing the EV traction battery, as well as the cost of basic operations. The battery repair section of the traction battery is represented as a multichannel queuing system, assuming that the flow of applications for diagnosing and repair is Poisson's flow, and the ran dom process is Markovian. The problem of rational organization of the EV traction battery repair site has been solved by determin ing the minimum number of repair posts, at which the queue will not grow indefinitely (if customers can wait for their service for a long time and do not leave the queue). The number of repair posts was estimated for the traction battery, which in the existing conditions will allow organizing technical customer service effectively, minimizing the total economic losses from downtime of process equipment and refusals of applications for repairs. originality. The use of models and methods of the queuing system for the calculation of technical and economic indicators of the production capacity of the traction battery repair section allowed taking into account the stochastic nature of the needs for repaire, and determining the optimal values of those characteristics that ensure the efficient performance of the EV repair section. Practical value. The proposed method for determining the production capacity of the repair section of traction battery is used in solving problems related to the selection and rational placement of technological equipment when designing or upgrading a workshop.

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supporting

confidence: 68%

mentioning

confidence: 99%

On determining productive capacity of EV traction battery repair area

Koriashkina¹,

Deryugin²,

Fedoriachenko³

et al. 2019

NVNGU

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show abstract

“…In case of using it the criteria used gain the smallest magnitude. 4. For testing the axles for wheelsets of the considered size, by criterion of power consumption the rational is the vibrator design with sectoral debalance rotating at the angular speed of around 150 s -1 .…”

Section: Discussionmentioning

confidence: 99%

“…its axle. Therefore, latterly numerical studies of theoretic and experimental nature are conducted, both for railway transport vehicles [1,2,3], and for motor vehicles that contain railway running equipment [4,5,6].…”

Section: Introductionmentioning

confidence: 99%

Justification of parameters of wheelset axle fatigue strength test-bench for railway rolling stock

2019

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The operation safety of the railway rolling stock depends directly on the strength of the base part of the wheelset – its axle. Therefore, in recent years numerous studies of theoretical and experimental nature, both for means of rail transport, and for machines containing rail track equipment are carried out. This paper substantiates the main parameters of the fatigue test bench for axles for wheelsets of railway rolling stock. We performed an analysis of the load schema for bench tests, determined the dependence of the bench work force on the parameters of the wheelset axle. In addition, we substantiated the design and parameters of vibrator. For the research, we adopted the following criteria of rationality: work force, energy consumption and longitudinal dimension of the test bench. The design is considered the best, if these criteria acquire the smallest values. The results of the research indicate that the load scheme “cantilever beam” is rational for the fatigue bench tests of the axles for wheelsets of railway rolling stock. The best design of the vibrator have to provide the test bench work force by rotating the unbalanced mass around the stationary wheelset axle. The rational vibrator contains a sectoral eccentric mass rotating at an angular velocity of about 150 s-1. In this case, the eccentric mass value is about 80 kg, and its eccentricity is 135 mm.

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“…Vibrations in tenths of a millimeter can be observed within the range from 2700 to 3500 s -1 . To analyze the test-bench operation in transient modes the system was introduced (3) with a structural damping of vibrations proportional to the rate: The sequence of simulation model development with the aid of Simulink visual tools is described in [21]. Let's transform the system to (6) modelling-friendly appearance: .…”

Section: F C a A A A A C A C C C C F C A A A A C A C C C Cmentioning

confidence: 99%

Simulation modelling of the rolling stock axle test-bench

2019

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Wheelset axles are essential parts of railway and mine site rolling stock. For fatigue testing of axles, various test-benches are designed to implement the cyclic loads. The effectiveness of test-bench vibration analysis grows with the use of numerical approach and simulation models created with the aid of visual programming tools. The purpose of the work is to develop and assess the proposed simulation models of test-bench dynamics created with the aid of visual programming tools. Based on mathematical models, the test-bench simulation models of the lever system vibration have been developed. Simulation models are created with the aid of Simulink visual programming tools running under Matlab system. For modelling the components of Simulink, the SimMechanics and DSP System Toolbox Libraries are used. The comparative analysis of proposed models has been made. For the first time, with the aid of Simulink visual programming tools, the set of test-bench vibration simulation models has been obtained in steady-state and transient motion modes for linear task formulation. The proposed S-models allow automation and visualization of the motion dynamics study for test-bench components in order to determine their rational elastic-weight, kinematic and dynamic behavior. Simulation of vibrations was carried out using design parameters of the test-bench metal framework.

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Mathematical and s-models of cargo oscillations during movement of bridge crane

Cited by 7 publications

References 0 publications

On determining productive capacity of EV traction battery repair area

On determining productive capacity of EV traction battery repair area

Justification of parameters of wheelset axle fatigue strength test-bench for railway rolling stock

Simulation modelling of the rolling stock axle test-bench

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