Dynamic Modeling of Ball Mill Drive With Regard to Damping Properties of Its Elements

Povetkin, Vitaly; Isametova, Madina; Isayeva, I.N.; Bukayeva, Amina

doi:10.25018/0236-1493-2018-5-0-184-192

Cited by 4 publications

(4 citation statements)

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“…In the first assessment of the durability of the drum, we can talk about a further calculation for fatigue, which should be carried out according to the method of long-term fatigue. Based on the results of the calculation of the stress-deformable state of the shaft given above, it is possible to reasonably choose the S-N method of calculating multi-cycle fatigue, since multi-cycle fatigue occurs at stresses significantly below the yield strength (σ max <0.6σ 0.2 ), as the condition is met σ max <0.6σ 0.2 [17].…”

Section: Evaluation Of the Shell Durabilitymentioning

confidence: 99%

Development of a technique for computer simulation of the stress state of the drive drum shell of a belt conveyor to optimize its design parameters

Jassinbekov

Isametova

Kaldan

2021

EEJET

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The paper considers the method of computer simulation of the stress-strain state of the drive drum shell in the NASTRAN integrated environment. Due to the complexity of determining stresses and deformations in the drum sections by the analytical method, it is proposed to solve this important problem using the numerical finite-element method. At the preliminary stage of computer modeling, a mechanical design scheme was developed, including a variable pressure that changes depending on the angle of rotation of the drum, the deterministic relations describing the variable force factors are based on the Euler ratio. It is also proposed to take into account the pressure from the variable friction force, which depends on the changing coefficient of adhesion of the belt to the drum. As a result of the computer calculation, the equivalent Mises stresses of 65 MPa were determined, the safety factor was 4.2 and the components of the tangential stresses were determined using the stress tensor marker, the shear stress reached the level τ=16 MPa for fabric tape and τ=3.14 MPa for rubber tape. According to the results of the calculation, the dependence of the tangential stresses on the angle of rotation of the drum was constructed. A diagram of the change in the component of tangential stresses along the forming shell of the drum was constructed. Analysis of stress-strain state allowed us to determine the factor of safety of the drum shell. Based on the analysis of equivalent stresses, it is proposed to further calculate the durability of the drum using the method of long-term fatigue. The computer calculation of shear stresses in the component allows choosing the rational parameters of the lining, based on such indicators as peel strength and break, as well as determining the angle 61° of the slab lining required to improve the reliability and traction ability of the pipeline

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Section: Evaluation Of the Shell Durabilitymentioning

confidence: 99%

Development of a technique for computer simulation of the stress state of the drive drum shell of a belt conveyor to optimize its design parameters

Jassinbekov

Isametova

Kaldan

2021

EEJET

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“…Particular solution to the last equation ω (2) E (t) is determined by expression of ω (2) E (t) = ω 0 E . General solution to homogeneous equation will take the following form ω (1) E (t) = Ce λt .…”

Section: Effect Of Angular Velocitymentioning

confidence: 99%

“…Transient modeswhich include start, acceleration, reversing, and deceleration of technological equipment drive-are the modes of equipment operation characterized by maximum loads and thus they necessitate coordination between the engine electro-mechanical properties and the equipment dynamic parameters given specific to certain mechanisms resistance forces and moment of inertia. The issues and problems related to modeling various dynamic processes within electro-mechanical systems have been receiving major attention recently [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Properties of Technological Drive Operating in Acceleration Mode

Ershov

Lukyanenko

Zlotnikov

2021

Electromechanics and Robotics

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The study centers on dynamic transients resulting from jump-like changes in controller of machinery electrical drive. Discussion requires description of dynamic processes in various operation modes-acceleration, deceleration, reversing, and transition between different angular velocities given DC and AC engines momentums conditioned on angular velocity values. Conditions in which technological drives operate necessitate relevant transient modes aiming either to provide for maximization of operation speeds, or minimization of losses, or limitation of dynamic loads generated in components of kinematic chains which link electric drive and working element, etc. Control of transient processes in the electric drive guarantees maximum operation speeds and equipment performance given specific limitations. On the basis of the dynamic drive model with two degrees of freedom, the different stages of the run-up mode were analyzed. The characteristics of the static component of torque on the shaft in steady mode and the dynamic component caused by the transient process are determined. The ways of reduction of the dynamic component significant for the drive operation are offered.

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“…It should be noted that at present, the creation of a good competitive product, including from composite materials, is impossible without the use of computer technologies for virtual product development (or VPD technologies). Given the complexity of the task, modeling and analysis of composite structures should be carried out with the involvement of the most modern engineering analysis systems (or СAE systems) implementing the finite element method (FEM) [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Development and verification of mechanical characteristics of a composite material made of a thermoplastic matrix and short glass fibers

Isametova

Abilezova

Dishovsky

et al. 2021

EEJET

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The paper presents the results of computer modeling and prediction of the mechanical properties of composite materials with a polycarbonate matrix filled with short glass inclusions. At the micro-level, the influence of the volume of inclusions on the mechanical properties of the designed composite based on polycarbonate matrix is studied in the DIGIMAT (France) program. It was found that with a ratio of the sizes of inclusions in the range of 468÷60, the particles have a needle shape, and the material with such inclusions has a higher stress limit and elastic modulus than with a shape coefficient less than 50. The components of the fiber orientation tensor were also determined, at which the values of computer modeling are in good agreement with experimental data. The influence of the size of the finite element grid on the characteristics of the composite at the macro level was studied, and recommendations were given for choosing the size of the face of the finite element. The adequacy of computer models was confirmed by the results of field tests. The paper presents the results of testing flat samples made by injection molding technology. Mechanical tests were carried out for three variants of samples made of composite material based on a polycarbonate matrix with 10 %, 20 % and 30 % inclusions. The discrepancy between the experimental and computer results for samples with 10 %, 20 % content of short chopped fibers is explained by the influence of technological factors on the properties of the material at the macro-level. The conducted research allowed us to develop a computer modeling technique used at the stage of development of polymer composites based on thermoplastic matrices with short glass inclusions

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Dynamic Modeling of Ball Mill Drive With Regard to Damping Properties of Its Elements

Cited by 4 publications

References 0 publications

Development of a technique for computer simulation of the stress state of the drive drum shell of a belt conveyor to optimize its design parameters

Development of a technique for computer simulation of the stress state of the drive drum shell of a belt conveyor to optimize its design parameters

Dynamic Properties of Technological Drive Operating in Acceleration Mode

Development and verification of mechanical characteristics of a composite material made of a thermoplastic matrix and short glass fibers

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