Wyniki wyszukiwania - BazTech

1

Methodology for the Composite Tire Numerical Simulation Based on the Frequency Response Analysis

Karpenko Mykola, Skačkauskas Paulius, Prentkovskis Olegas

Eksploatacja i Niezawodność

|

2023

|

Vol. 25, no. 2

art. no. 163289

EN

Reliability and maintenance analysis in transport focus on the main objective of accident and incident investigations that benefit to better understanding of the causes of accidents and prevention of them in the future. The conducted research presents theoretical and experimental research on composite pneumatic tire used in transport engineering. The approach of the numerical simulation sequence which is offered in this research facilitates engineers in efficient determination of the dynamic properties and behaviour of vehicle tire at design stage. The tire materials have been tested by employing piezoelectric micro-vibration tests and frequency analyses. The Finite Element Method used for numerical simulation in combination with experimental measurements based on optimization by material frequency response, was applied in modelling tire material behaviour avoiding problems of composite structure modelling. The obtained results indicate that the offered methodology can be used in numerical simulation of composite tire investigation and considering material viscos-elastic properties.

2

Research on high-pressure hose with repairing fitting and influence on energy parameter of the hydraulic drive

Karpenko Mykola, Prentkovskis Olegas, Šukevičius Šarūnas

Eksploatacja i Niezawodność

|

2022

|

Vol. 24, no. 1

25--32

EN

Reliability and maintenance analysis of transport machines hydraulic drives, basically focused to power units: pumps, cylinders etc., without taking in to account junction elements. Therefore, this paper proposes a research analysis on high-pressure hoses and junctions during technical maintenance. Comparative analysis of fluid behavior and energy efficiency inside non-repaired and repaired high-pressure hoses is presented in this research. Theoretical and experimental research results for hydraulic processes inside high-pressure hose is based on the numerical simulations using Navier–Stokes equations and experimental measurement of fluid flow pressure inside high-pressure hoses. Research of fluid flow dynamics in the hydraulic system was made with main assumptions: system flow rate in the range from 5 to 100 l/min, diameter of the hoses and repairing fitting are 3/8". The pressure drops, power losses, flow coefficients at non-repaired and after maintenance hose was obtained as a result. Simulation results were verified by running physical experiments to measure the pressure losses.

3

Investigation of dynamic processes in a gearbox with defects

Bogdevičius Paulius, Bogdevičius Marijonas, Prentkovskis Olegas

Transport Problems

|

2019

|

T. 14, z. 3

5--15

EN

The article presents theoretical research of a transmission system that allows examination of the dynamic processes evaluating different sizes of defects in gear tooth (0%, 20%, 50%, 80% of teeth width) and gaps between the connection of the gear teeth. The dynamics of the transmission is described using the finite element method and discreet elements. This paper presents and analyzes the results of mathematical experiments on this system.