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Wyszukujesz frazę "Nieoczym, Aleksander" wg kryterium: Autor


Wyświetlanie 1-6 z 6
Tytuł:
Driver’s distraction and its potential influence on the extension of reaction time
Autorzy:
Tarkowski, Sławomir
Caban, Jacek
Dzieńkowski, Mariusz
Nieoczym, Aleksander
Zarajczyk, Janusz
Powiązania:
https://bibliotekanauki.pl/articles/2200801.pdf
Data publikacji:
2022
Wydawca:
Sieć Badawcza Łukasiewicz. Przemysłowy Instytut Motoryzacji
Tematy:
traffic safety
driver’s attention
reaction time
eye tracking
Opis:
The driver’s reaction time is one of the most important parameters for the road preaccident analysis. There are known the results of tests, in which the value of this parameter was determined in expected and unexpected road situations. But in some cases, this time may be longer e.g. in situations in which the driver’s attention may be distracted by keeping observations other than the area, in front of the car’s surroundings. There are many manoeuvres, when the driver is obliged to observe many areas at the same time. Thus, his attention must be turned away from the main area – in front of the vehicle. The paper presents the results of tests involving the measurement of the driver’s attention time focused on observing the surrounding other than the car’s path. During the test, the driver’s attention was focus on observing the side and back mirror, car radio and at the mobile phone. Certain values can be potentially considered as extending the typical driver’s reaction time. The results of the presented tests have practical applications and can be used in the process of issuing opinions on traffic accidents.
Źródło:
Archiwum Motoryzacji; 2022, 98, 4; 65--78
1234-754X
2084-476X
Pojawia się w:
Archiwum Motoryzacji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Finite Elements Strenght Analysis of a Compressor Consisting of Four Helical Rotors
Autorzy:
Nieoczym, Aleksander
Szklarek, Karol
Powiązania:
https://bibliotekanauki.pl/articles/102611.pdf
Data publikacji:
2018
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
modal analysis
finite elements analysis
rotary-screw
compressor
analiza modalna
analiza elementów skończonych
śruba obrotowa
sprężarka
Opis:
The present article reports the results of tests of a compressor consisting of four helical rotors. Finite element strength analysis of rotors with varied screw thread pitch was performed. The analysis allowed us to determine the stress-strain state of the rotor material and deformation of rotors as an effect of loads generated during operation of the compressor. The analysis also made it possible to calculate the frequencies of the free vibrations of the rotors.
Źródło:
Advances in Science and Technology. Research Journal; 2018, 12, 1; 1-8
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fractographic Assessment and FEM Energy Analysis of the Penetrability of a 6061-T Aluminum Ballistic Panel by a Fragment Simulating Projectile
Autorzy:
Nieoczym, Aleksander
Drozd, Kazimierz
Powiązania:
https://bibliotekanauki.pl/articles/2024197.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
standard projectile fragment
ballistic panels
6061-T aluminum
FEM
odłamek pocisku standardowego
panele balistyczne
aluminium 6061-T
Opis:
In aviation and light vehicles, aluminum plates are often used instead of heavy shields as ballistic shields. The standard shrapnel was used in the analysis due to the fact that under hazardous conditions, the shrapnel destruction occurs more often than directly with a bullet. Analyses were performed in which the initial velocity and the angle of impact were the variables. The material of the aluminum plate (ballistic shield) with a thickness of 1 mm was divided into three-dimensional C3D4 tetragonal elements. The calculations were performed using the Johnson-Cook model for the impact at an adjustable velocity from 25 m/s to 55 m/s every 10 m/s and impact angle set between 0° and 45° in increments of 15°. Stress maps that allow observation of the plate degradation areas were placed in the plate. It was found that the penetration of the ballistic panel by the fragment under simulated conditions occurs at the initial velocity of this fragment greater than 25 m/s. The fragment simulating a projectile, hitting at a velocity of 35 m/s at an angle of not more than 15° perforates this panel. At an impact velocity of 45 m/s, perforation occurred at an impact angle of up to 30°. A further increase of the fragment’ velocity of impact on the plate resulted in its perforation even at the greatest impact angle.
Źródło:
Advances in Science and Technology. Research Journal; 2021, 15, 1; 50-57
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geometric optimization of a beam detector for a WIM system
Autorzy:
Nieoczym, Aleksander
Drozd, Kazimierz
Wójcik, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/103148.pdf
Data publikacji:
2018
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
FEM
BEAM
weigh-in-motion
deflection of the beam
fibre optic sensor
MES
ważenie w ruchu
ugięcie belki
czujnik światłowodowy
Opis:
Weigh-in-Motion (WIM) systems are designed for weighing vehicles driving across a measurement site. Because during measurements the vehicle has to come in physical contact with the components of the system, WIM systems always use built-in sensors installed in road pavement. Each WIM system consists of force sensors placed in one, two or even several lines, perpendicular to the direction of traffic. The idea behind WIM systems is to measure the dynamic loads that the wheels of a moving vehicle exert on the road surface and, on this basis, to estimate static wheel loads as well as gross vehicle weight.
Źródło:
Advances in Science and Technology. Research Journal; 2018, 12, 3; 233-241
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of specific factors on the state of the tire pressure value
Autorzy:
Caban, Jacek
Turski, Andrzej
Nieoczym, Aleksander
Tarkowski, Sławomir
Jereb, Borut
Powiązania:
https://bibliotekanauki.pl/articles/263179.pdf
Data publikacji:
2019
Wydawca:
Sieć Badawcza Łukasiewicz. Przemysłowy Instytut Motoryzacji
Tematy:
road safety
tire
vehicle safety
maintenance
Opis:
The article presents the research on the impact of specific factors on the state of the pressure value in passenger car wheels in service. Data on how the vehicle was used was obtained based on a survey. The survey contained data on checking the condition of the vehicle tires and also measured the tire pressure. The aim of the study was to investigate the relationship between the impact of specific factors on the state of the pressure value in passenger car wheels. The correlation analysis of the correctness of pressure in car tires and selected factors was carried out using the Kendall tau test. In addition, odds ratio (OR) analysis and the Hosmer and Lemeshow test were used to analyze the results. The work draws attention to the impact of improper tire pressure on tire durability and road safety as well as the functioning of other active safety systems. In addition, attention was drawn to drivers' awareness of the need to control the pressure in the wheels of the vehicle. Based on the analysis it was found that the age of the vehicle used and the driver's knowledge have the greatest impact on the correct tire pressure. Studies have shown that in over 60% of the vehicles analyzed, the tire pressure was normal.
Źródło:
Archiwum Motoryzacji; 2019, 85, 3; 137-148
1234-754X
2084-476X
Pojawia się w:
Archiwum Motoryzacji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling and Exploitation Load Tests of the Suspended Route Slings Caused by Passage of the Locomotive at Various Speed along Mining Excavation
Autorzy:
Drozd, Kazimierz
Nieoczym, Aleksander
Powiązania:
https://bibliotekanauki.pl/articles/2022491.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
suspended monorail
dynamic force
mining auxiliary transportation
Opis:
Despite the fact that suspended monorails have been used in the mining industry for over 50 years it is necessary to continue research on the possibilities of increasing the unit mass of the transported load or the speed of people transport. The first step is to establish the exact dynamic load of suspended route’ elements and compare this value with easy to calculation static load. The objective of the research was to determine the influence of speed and direction of travel on maximum load force applied to the sling of the route in mining excavation. The research results indicated that the speed of 2 ms−1 does not significantly influence the load on the sling. Theoretical hypothesis, stating that the estimation of the force value in the sling ought to be performed using projecting on a surface perpendicular to the route was confirmed. It was also proven that in order to characterize the geometry of the sling as well as a precise analysis of its load it is necessary to employ the length and the angle of the chain in relation to the above mentioned surface. Upon employing statistical analysis of the test results, the maximum dynamic effect of the locomotive passing was determined to be 20.1 ± 2.5% of the value of the calculated static load for all slings, projected onto a plane perpendicular to the route. For a single sling, mounted on a test route section inclined at an angle of about 10°, the increase in force due to the passage of the locomotive was up to 21.0% of the static load for this sling.
Źródło:
Advances in Science and Technology. Research Journal; 2022, 16, 1; 266-281
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-6 z 6

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