scholarly journals Investigation of the operation of vibration-centrrifugal installation for automobile parts machining

2021 ◽  
Vol 1 (101) ◽  
pp. 79-88
Author(s):  
Oleg Lyashuk ◽  
Leonid Serilko ◽  
Ivan Hevko ◽  
Olexander Kondratiuk ◽  
Oleg Tsion ◽  
...  
Keyword(s):  
Mathematical Modeling ◽  
Kinetic Energy ◽  
Treatment Process ◽  
Rotational Velocity ◽  
Parameters Optimization ◽  
Optimal Parameters ◽  
Process Parameters Optimization ◽  
Vibration Treatment ◽  
Machine Parts

The scheme of vibration-centrifugal installation, providing the increase of productivity and efficiency of machine parts vibration treatment is presented in this paper. The influence of the treated environment on the technological vibration treatment process and determination of its optimal parameters is investigated on the basis of mathematical modeling. Graphical dependences of specific kinetic energy on the crank rotational velocity at different values of the fork rotational velocity are presented. Effective ways of technological process parameters optimization and new ways of its development are identified.

Determination of optimal parameters of the tuned mass damper to reduce the torsional vibration of the shaft by using the principle of minimum kinetic energy

2018 ◽  
Vol 233 (2) ◽  
pp. 327-335 ◽  
Author(s):  
Duy-Chinh Nguyen
Keyword(s):  
Kinetic Energy ◽  
Torsional Vibration ◽  
Damping Ratio ◽  
Vibration Reduction ◽  
Tuned Mass Damper ◽  
Optimal Parameters ◽  
Lagrangian Equations ◽  
Tuning Ratio ◽  
Mass Damper

In this paper, an analytical method is presented to determine the optimal parameters of the symmetric tuned mass damper, such as the ratio between natural frequency of tuned mass damper and shaft (tuning ratio) and the ratio of the viscous coefficient of tuned mass damper (damping ratio). The optimal parameters of tuned mass damper are applied to reduce the torsional vibration of the shaft based on consideration of the vibration duration and stability criterion. The dynamic equations of the shaft are provided via Lagrangian equations, and the optimal parameters of tuned mass damper are derived by using the principle of minimum kinetic energy. Analytical and numerical examples are implemented to verify the reliability of the proposed method. The analytical and numerical results indicate that the optimal parameters of tuned mass damper have significant effects in the torsional vibration reduction of the shaft.

scholarly journals DETERMINATION OF EXTREME TRAIN RUNNING PARAMETERS ALONG A RAILWAY LINE SEGMENT

Transport ◽  
2006 ◽  
Vol 21 (2) ◽  
pp. 123-130 ◽  
Author(s):  
Jonas Jonaitis
Keyword(s):  
Energy Consumption ◽  
Total Energy ◽  
Point Of View ◽  
Parameters Optimization ◽  
Optimal Parameters ◽  
Total Energy Consumption ◽  
Railway Line ◽  
Decision Variables ◽  
Motion Parameters

It is possible to select train‐car draft mass and traction vehicle parameters for technical speed νt along segment sk in such a way that unitary total energy consumption related to train‐car mass would be the lowest. Such running is called extreme running while traction vehicle parameters and train‐car mass are called optimal from the point of view of energy consumption. The optimization of traction vehicle parameters is possible if a mathematical traction vehicle model is added to the running program and then vehicle parameters are made variable and added to motion parameters as subsequent decision variables within train running program. Together with the train motion parameters optimization traction vehicle parameters should be optimized according to the criterion of unitary total energy consumption related to train‐car mass. Traction vehicle optimal parameters depend on train technical speed, length and profile of segment , as well as, on train‐car mass.

scholarly journals Determination of the duration of deburring at vibro-abrasive treatment of parts in organic media

2020 ◽  
Vol 329 ◽  
pp. 03024
Author(s):  
Yelena Kolganova ◽  
Ivan Vyalikov ◽  
Anna Azarova ◽  
Roman Mishchenko ◽  
Georgiy Sanamyan
Keyword(s):  
Process Model ◽  
Granular Media ◽  
Treatment Process ◽  
Experimental Studies ◽  
Organic Media ◽  
Complex Profile ◽  
Vibration Treatment ◽  
Working Media ◽  
Cleaning Treatment

Basing on the radio-electronic equipment parts design and technological features analysis and granular media vibration treatment process main technological principles, a process model has been developed providing surfaces parts effective finishing and cleaning treatment by means of organic origin working media. Complex-profile devices parts bone organic media vibration treatment experimental studies have been carried out.

scholarly journals Determination of the Optimal Parameters of the Jet Aeration

2021 ◽  
Vol 939 (1) ◽  
pp. 012029
Author(s):  
M Radkevich ◽  
M Abdukodirova ◽  
K Shipilova ◽  
B Abdullaev
Keyword(s):  
Mass Transfer ◽  
Wastewater Treatment ◽  
Oxygen Transfer ◽  
Treatment Process ◽  
Experimental Studies ◽  
Biological Wastewater Treatment ◽  
Optimal Parameters ◽  
Wastewater Treatment Process ◽  
Complex Criterion

Abstract To ensure effective aeration of the biological wastewater treatment process, easy-to-operate and not too energy-intensive units are needed. Jet aerators have such capabilities. In this study, the authors searched for the best hole shape for the aeration nozzles. It was determined that a nozzle with an elongated hole has the largest size of the actively aerated zone. Experimental studies of nozzles of a diameter of 56 mm with nozzles of elongated shape showed that the best characteristics of mass transfer are provided by nozzles with a total area of holes of 356 mm2 at a flow rate of 10 … 12 m/s. For practical calculations, an equation was obtained for the dependence of the oxygen transfer coefficient KLa(20) on the complex criterion vn, and a method for calculating aeration units was developed, which is applicable for aerators with elongated holes.

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