Title of the article

EFFECT OF GAP CLEARANCES IN AUTOMATIC COUPLING DEVICES ON LONGITUDINAL FORCES IN INTERCAR CONNECTIONS OF HOMOGENEOUS TRAIN

Authors

SHIMANOVSKY Alexandr O., D. Sc. in Eng., Assoc. Prof., Head of Technical Physics and Theoretical Mechanics Department, Belarusian State University of Transport, Gomel, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

SAKHARAU Pavel А., Ph. D. Student of Technical Physics and Theoretical Mechanics Department, Belarusian State University of Transport, Gomel, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

In the section DYNAMICS, DURABILITY OF VEHICLES AND STRUCTURES
Year 2019 Issue 2 Pages 42–50
Type of article RAR Index UDK 629.4.016.12:004.94 Index BBK  
Abstract

A computer simulation of transient processes is performed that occur in the train intercar connections at starting from standstill, transition to idling and electrodynamic braking by the locomotive on a straight horizontal section of the railway track. The  effect of gap clearances in the automatic coupling devices of homogeneous trains on the maximum intercar forces and the nature of their actions is studied. The diagrams of the maximum forces in the train at transient processes and their distribution along the train length are presented. It is shown that increase of the gap clearances leads to an increase in the values of impact forces and their action time. The necessity of a smooth change of the traction and braking forces at train operation allowing to reduce the longitudinal forces to values that ensure the traffic safety is demonstrated.

Keywords

longitudinal force, gap clearances in automatic coupling devices, homogeneous train, traction, braking

   
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Title of the article

ON CYCLIC LIFE EVALUATION OF PRODUCTS AT RANDOM LOAD

Authors

SURIN Vitaliy M., D. Sc. in Eng., Prof., Professor, Belarusian State University of Informatics and Radioelectronics, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

DZERZHINSKIY Stanislav M., Ph. D. in Eng., Assoc. Prof., Associate Professor, Belarusian State Academy of Telecommunications, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

In the section DYNAMICS, DURABILITY OF VEHICLES AND STRUCTURES
Year 2019 Issue 2 Pages 36–41
Type of article RAR Index UDK 620.169.1 Index BBK  
Abstract

An experimental study of the influence of the rms value and the broadband parameter of the random load on the durability of the elements of the products is carried out. According to the test results, the dependence of the durability on the broadband parameter is proposed. The accuracy of the correspondence of the data calculated by the proposed dependence with the experimental results is evaluated.

Keywords

random loads, cyclic life, tests, broadband parameter

   
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Title of the article

LOAD OF CUTTING UNITS DRIVES OF MINING EQUIPMENT. PART 1. METHODOLOGICAL APPROACHES TO MONITORING OF  TECHNICAL CONDITION OF SHEARER CUTTING UNIT BY  PARAMETERS OF ITS DRIVE LOAD

Authors

ROMANOVICH Alexander S., Director General, UPE “Niva”, Soligorsk District, Republic of Belarus

KANAPLIANIK Ivan A., Ph. D. in Eng., Deputy Director General for Technical Policy and Innovations, UPE “Niva”, Soligorsk District, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

In the section MECHANICAL-ENGINEERING COMPONENTS
Year 2019 Issue 2 Pages 20–28
Type of article RAR Index UDK 622.6 Index BBK  
Abstract

A mathematical model of the load of the shearer drive of the drum type cutting unit is introduced. It takes into account the speed of its movement, the angular speed of rotation of the cutting unit, the taper angle of the cutting part and the number of picks. At design stage, its use makes it possible to determine the required rated drive power, taking into account sylvinite resistance to cutting, the tapering angle and the drum width, and during the shearer operation, to determine the actual value of potash resistance to cutting index in order to select the most efficient value from the standpoint of productivity, geometric parameters of picks and tooling for their fastening. Analytical dependencies are suggested, linking the cutting unit drive load and the cutting process performance with the modes of shearer operation, including its movement speed and speed of the cutting unit rotation, the taper angle of the picks and their quantity, the analysis of which showed that reducing the pick angle φ makes it possible to increase the capacity of the shearer by 10–20 % without increasing the cutting unit load. However, it is necessary to take into account the strength properties and wear resistance of the picks, the interrelation of the increasing thickness of the sheared layer with the design parameters of the picks and pick holders, and cutting depth influence on particle size distribution of the mined ore.

Keywords

fluctuations of cutting force, modeling, load, modes of operation, drive, capacity

   
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Title of the article

CALCULATED DETERMINATION OF FAILURE LOADS OF LEAF SPRINGS EYES AT COLLISION OF TRUCK WITH ANTI-RAM DEVICE

Authors

IVCHENKO Vadim I., Deputy Head of the Republican Computer Center of Mechanical Engineering, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

SHMIALIOU Aliaksei V., Ph. D. in Eng., Deputy Director General for Research, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

In the section DYNAMICS, DURABILITY OF VEHICLES AND STRUCTURES
Year 2019 Issue 2 Pages 29–35
Type of article RAR Index UDK 004.942 Index BBK  
Abstract

Recommendations were developed for determining the strength indicators of the most loaded elements of the top spring leaves of the front suspensions of trucks based on computer simulation of the processes of destruction and the study of the mechanical properties of the material. The method was tested on the example of a standard spring design with two upturned eyes at the front ends. The proposed guidelines for determining the indicators of the strength of the springs eyes can be used in the design of road blockers for the calculation of the existing loads.

Keywords

truck, computer simulation, anti-ram device, strength, spring, bench tests, impact interaction

   
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Title of the article

PROBLEM OF TRANSFERRING CONTROL TO DRIVER IN HIGHLY AUTOMATED VEHICLES: METHOD FOR MONITORING PERCEPTION OF  SEMANTICALLY BINARY RELEVANT INFORMATION BY DRIVER

Authors

SAVCHENKO Vladimir V., Ph. D. in Eng., Chief of the R&D Center “Onboard control systems of mobile machines”, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

In the section GENERAL ISSUES OF MECHANICS
Year 2019 Issue 2 Pages 14–19
Type of article RAR Index UDK 629.113.06+612.821+612.223+616.2 Index BBK  
Abstract

A method of monitoring perception of semantically binary relevant information by a driver in highly automated vehicles is presented for the first time, taking into account information flows circulating in the vehicle’s on-board systems, the driver’s reactions to semantically binary relevant information, the dynamics of the driver’s professionally important qualities in a solution to transferring control to the driver in highly automated vehicles when the onboard systems of the vehicle can not support further “without pilot” control mode, i. e. they do not correspond to the operational design domain. The current main problems of the safety of the operation of highly automated and unmanned vehicles are considered. The structure of the upper level system is developed for the transfer of control to the driver in highly automated vehicles. A classification of semantically binary relevant information is presented, and significant factors influencing perception are identified.

Keywords

perception of semantically binary relevant information, emergency preparedness, operational design domain, communication platform, cloud storage technologies, data conversion and processing, transfer of control to driver in highly automated vehicles, professionally important qualities, situation awareness, human factor

   
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