scholarly journals CALCULATING AND MODELING ROPE MECHANISM OF A MOBILE CRANE TELESCOPIC BOOM

2021 ◽  
Vol 2021 (1) ◽  
pp. 13-22
Author(s):  
Aleksandr Reutov
Keyword(s):  
Computer Modeling ◽  
Contact Interaction ◽  
Software Package ◽  
Power Analysis ◽  
Mechanical Characteristics ◽  
Mobile Crane ◽  
Preliminary Tension ◽  
Universal Mechanism

Power analysis and computer modeling of moving the telescopic boom rope mechanism using the “Universal Mechanism” software package, considering the mechanical characteristics of the ropes, boom sections and their contact interaction, have been carried out. The dependences for calculating the preliminary tension of the ropes are obtained, the regularities of operating the cable mechanism of the crane telescopic boom are established.

Assessment of the wear of wheels of freight cars under the existing standards for releasing three-piece bogies with an axle load of 23,5 tf from repair

2021 ◽  
Vol 18 (1) ◽  
pp. 52-61
Author(s):  
A. V. Saidova ◽  
◽  
V. I. Fedorova ◽  
Yu. B. Zhitkov ◽  
I. V. Fedorov ◽  
...  
Keyword(s):  
Computer Modeling ◽  
Software Package ◽  
Practical Importance ◽  
Optimal Parameters ◽  
Wheel Wear ◽  
Rail System ◽  
Freight Car ◽  
Universal Mechanism

Objective: To assess the effect of the dimensions and tolerances of three-piece bogies of freight cars with a maximum static axle load of 23,5 tf when they are released from scheduled repair on the wheel flange wear in operation. Methods: For this purpose, drawing on a review and analysis of the literature in the field of wheel-rail system wear and the current requirements of guidelines for the repair of freight cars and their parts, design cases were formed to simulate a railway crew movement along a track of various designs with operating speeds, and the processes of wheel flange wear were studied using simulation computer modeling in the environment of the “Universal Mechanism” software package. Results: The parameters of freight car bogies which have the greatest impact on wheel wear have been determined. The quantitative values of the indicators of wheel wear for various cases of crew movement have been determined. The ways of reducing the wear of car wheels in operation by changing the dimensions and tolerances of bogies when they are released from scheduled types of repair are shown. Practical importance: The obtained results of the work commissioned by JSC “First Freight Company”are currently used to formulate requirements for the dimensions and tolerances of bogies when they are released from repair in order to establish the optimal parameters that would help to reduce the wheel flange wear in operation. In addition, they can be used in the developing new designs of freight car bogies.

The Amplitude Calculation Massive Foundations of Machines Taking into Account the Damage

2020 ◽  
Vol 1006 ◽  
pp. 123-129
Author(s):  
Olena V. Mykhailovska ◽  
Mykola L. Zotsenko
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Personal Computer ◽  
Software Package ◽  
Mechanical Characteristics ◽  
Oscillation Amplitude ◽  
Building Codes ◽  
Dynamic Impact ◽  
Methods Of Calculation ◽  
Physical And Mechanical Characteristics

The known methods of calculation of oscillation amplitudes of massive foundations of machines taking into account damage are analyzed in the article. It is established that the method set out in the building codes allows to determine the amplitudes of the foundation oscillations at any point of the foundation, approximately enough. This technique does not take into account the interaction with the soil of the deepened foundations, but takes into account only the physical and mechanical characteristics under the sole of the foundation. The authors propose a finite element method (FEM) calculation using the Plaxis 7 software package installed on a personal computer and a vibrometer. The result is the oscillation amplitude of the massive foundation. The presence of cracks and damage increases the magnitude of the oscillation amplitudes from the dynamic impact. If you make timely planned repairs to the foundations, the amplitude of the oscillations can be reduced.

Impact of lubrication on the safety of cargo traffi c

Innotrans ◽  
2020 ◽  
pp. 43-45
Author(s):  
Inna L. Parahnenko ◽  
Keyword(s):  
Traffic Safety ◽  
Software Package ◽  
Classical Method ◽  
Side Surface ◽  
Transverse Force ◽  
Rolling Stock ◽  
Small Radius ◽  
Vertical Load ◽  
Curved Section ◽  
Universal Mechanism

The wear hardness of the wheel in the gauge when passing curved sections of the track is a primary factor for traffic safety. This parameter is determined by the ratio of the transverse force that increases when the crew passes the curved section to the dynamic vertical load from the rolling stock on the rail. Using mathematical modeling in the software package «Universal mechanism», it is proved that the use of lubrication on the tracks of both track rails reduces the longitudinal forces by up to 60% in curves of small radius and up to 30% at radius up to 1000 m. It is possible to reduce the transverse forces by at least 15% by applying a lubricant to the track of the inner track rails [1, 2]. The use of the classical method (lubrication of the side surface of the outer rail) did not reveal a significant reduction of the forces.

Abnormal Structural Strength of Topocomposites

2012 ◽  
Vol 560-561 ◽  
pp. 338-343 ◽  
Author(s):  
Nikolay A. Voronin
Keyword(s):  
Surface Layer ◽  
Bearing Capacity ◽  
Half Space ◽  
Contact Interaction ◽  
Solid Body ◽  
Mechanical Characteristics ◽  
Structural Strength ◽  
Layered Material ◽  
Thin Surface Layer ◽  
Layer Coating

The mechanics of contact interaction of rigid spherical indenter with two-layer elastic - plastic half-space, simulating a surface of a solid body with a thin surface layer is considered. Analytical dependences of critical indentation and bearing capacity on mechanical characteristics of materials of a base and a coating, and as well as that for thickness of top layer (coating) in all region of possible thickness are received and analyzed. Existence of regions of the abnormal structural strength allowing the surface layered material to identify unequivocally as a topocomposite is shown. Theoretical dependences were verified by a final elements method.

scholarly journals Designing a Tracked Running Gear of a Radio-Controlled Harvester

2020 ◽  
Vol 329 ◽  
pp. 05001
Author(s):  
Vladislav Klubnichkin ◽  
Evgeny Klubnichkin ◽  
Maxim Yakovlev ◽  
Vladimir Makarov ◽  
Vladimir Belyakov
Keyword(s):  
Software Package ◽  
Variable Parameters ◽  
Tracked Vehicles ◽  
Tractive Effort ◽  
Applied Software ◽  
Basic Characteristics ◽  
Universal Mechanism ◽  
Selection Of

This work describes a model of a running gear of the designed tracked radio-controlled harvester intended for clean cutting which has been developed in the applied software package “Universal Mechanism” with use of the “Tracked Vehicles” module. It offers basic characteristics, justifies selection of variable parameters of the model. It describes modelling options of a model travel over variable irregularities, presents the obtained tractive effort torques on sprockets and loads acting on the support rollers.

scholarly journals Features of the influence of intermediate rail fastenings on the operational durability of rails

2021 ◽  
Vol 80 (4) ◽  
pp. 201-208
Author(s):  
N. V. Kuznetsova ◽  
E. A. Sidorova
Keyword(s):  
Fatigue Damage ◽  
Software Package ◽  
Main Type ◽  
Contact Fatigue ◽  
Railway Network ◽  
Bench Tests ◽  
Study Results ◽  
Calculation Results ◽  
Current Content ◽  
Universal Mechanism

Heat-strengthened rails of the R65 type are the main type of rails used on the railway network of Russian Railways. Reducing the number of cropped and acutely defective rails is possible due to the rational use of the design features of intermediate rail fasteners and their current content.The article presents study results of the stiffness influence of intermediate fasteners on the operational durability of rails. The general statistics of the use of various types of intermediate rail fastenings on the network of Russian railways is considered. The main results of previously published studies on the effect of the stiffness of intermediate rail fasteners on the accumulation of contact fatigue damage in rails are briefly presented.Calculations of the accumulation of contact-fatigue damages in rails, carried out by the authors, are based on the data on the vertical and horizontal transverse stiffness of intermediate rail fastenings obtained from the results of bench tests. Calculations of the accumulation of contact-fatigue damage were carried out using the “Universal Mechanism” software package. In the process of modeling, four types of intermediate rail fasteners were considered: ARS-4, ZhBR-65Sh, ZhBR-65PShM and W-30. Calculation results were obtained for a curve with a radius of 650 m on a continuous welded track section.

ASONIKA-V: mechanical influence simulation of electronic structures installed on vibration isolators

2021 ◽  
Author(s):  
Keyword(s):  
Electronic Structures ◽  
Software Package ◽  
Random Vibration ◽  
Mechanical Characteristics ◽  
Acoustic Noise ◽  
Linear Acceleration ◽  
Vibration Isolator ◽  
Vibration Isolators ◽  
Characteristics Analysis ◽  
Mechanical Influence

The ASONIKA-V software package, intended for the mechanical characteristics analysis of the cabinets, racks and blocks of radio-electronic equipment installed on vibration isolators is consi dered. Account of harmonic vibration, random vibration, shock loads, linear acceleration, acoustic noise is provided. The issues of identification, parametric and structural optimization are considered. Keywords radio engineering device; mechanical characteristics; identification; math modeling; vibration isolator; optimization

scholarly journals A multiphysics model of processes in electromagnets and actuators of vacuum switching devices taking into ac-count contact interaction of structural elements

2021 ◽  
pp. 15-18
Author(s):  
Mykhailo Panteliat ◽  
Artem Kuzmin
Keyword(s):  
Mathematical Models ◽  
Computer Modeling ◽  
Contact Interaction ◽  
Permanent Magnets ◽  
World Market ◽  
Structural Elements ◽  
Circuit Breakers ◽  
Electromagnetic Actuators ◽  
Software Products ◽  
Switching Devices

The purpose of the work is to improve mathematical models and algorithms of computer modeling of multiphysics processes in electromagnets and actuators of vacuum switching devices by taking into account the contact interaction of structural elements when changing their stress-strain state. In the design of modern vacuum circuit breakers and contactors, there is a significant use of electromagnetic actuators based on high-coercive hard magnetic rare earth composite materials NdFeB and SmCo. The most promising for use as drives of circuit breakers and contactors are polarized electromagnets based on the use of these high-coercive permanent magnets. However, the existing serial designs of electromagnets and actuators need to be significantly improved in order to increase reliability and service life, reduce weight and cost, further reduce energy consumption, improve the manufacturability of the mass production process. Computer simulation is proposed to be performed by the Finite Element Method in 2D formulation using commercial software products and/or software created directly for these investigations. One of the priority areas for improving mathematical models and algorithms for computer modeling of processes in the mechanical circuit of vacuum switching devices of medium and high voltage is to take into account the contact interaction of the structural elements of the devices under consideration. The next step, thanks to the use of an advanced mathematical model, is to perform a set of computational research and based on the obtained numerical results to develop recommendations aimed at creating designs of electromagnets and actuators that would meet world standards and be competitive in the world market.

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