Temat: vehicle resistance - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Vehicle coast-down method as a tool for calculating total resistance for the purposes of type-approval fuel consumption
Autorzy:: Šarkan, B.
Skrúcaný, T.
Semanová, Š.
Madleňák, R.
Kuranc, A.
Sejkorová, M.
Caban, J.
Powiązania:: https://bibliotekanauki.pl/articles/197483.pdf
Data publikacji:: 2018
Wydawca:: Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:: vehicle coast-down method
vehicle resistance
aerodynamic drag
tyre rolling resistance
fuel consumption
metoda wybiegu
odporność pojazdu
opór aerodynamiczny
opór toczenia opon
zużycie paliwa
Opis:: A coast-down test is carried out in cases when there is a need for the exact expression of the forces acting on a road vehicle during its coast-down. These forces act mainly against the vehicle’s movement due to air and tyre rolling resistance. Knowledge of the course of these forces throughout the vehicle’s movement range is also a requirement when measuring fuel consumption with a roller performance dynamometer. The reason is that this device has to load the rollers by force or performance corresponding to the given vehicle, while testing it during various driving cycles. For approval purposes, the requirements for this type of test are described in the applicable regulations, i.e., UNECE Regulations No. 83 and No. 101, or the newly developed Worldwide Harmonized Light Vehicles Test Procedure (WLTP). Slovak Technical Standard STN 30 0556 also contains detailed procedures for carrying out the test. The authors of this paper have taken into account both types of technical regulations in order to conduct coast-down tests on chosen vehicles. The results are usable in terms of measuring fuel consumption on a roller dynamometer. Furthermore, the vehicle’s economic performance in normal operation mode can be also assumed with these results.
Źródło:: Zeszyty Naukowe. Transport / Politechnika Śląska; 2018, 98; 161-172
0209-3324
2450-1549
Pojawia się w:: Zeszyty Naukowe. Transport / Politechnika Śląska
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Energy efficiency of rubber tracked chassis
Autorzy:: Dudziński, P.
Chołodowski, J.
Powiązania:: https://bibliotekanauki.pl/articles/246674.pdf
Data publikacji:: 2016
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: trackled vehicle
rubber track
rubbert belt
motion resistance
internal motion resistance
energy-efficiency
tractive efficiency
Opis:: Nowadays, increasing number of machines and off-road vehicles are equipped with elastomeric, mainly rubber, tracked chassis. Rubber tracks and belts combine the most important advantages of both: pneumatic tires and conventional tracks made from metal links. In spite of significant benefits, rubber tracked chassis is a novel and uncommon design solution, as the application of rubber tracks and belts still brings up many severe problems. Consequently, an urgent need to overcome these problems exists. In The Division of Off-Road Machine and Vehicle Engineering (DORMVE) an intensive research, pertaining to rubber-tracked chassis has been conducted for many years. In the very beginnings, the investigation was carried on in cooperation with German companies INTERTRACTOR, IAMT and IBAF. As a result, numerous original and innovative design solutions, which became a subject of European, American and Japanese patents, were developed. However, some issues have not yet been resolved. Present research of DORMVE is aimed at identification of problems concerning energy efficiency of rubber-tracked chassis. The main objective of current investigation is to improve the energy efficiency. To do so a comprehensive optimisation process is to be carried out. Within the following article, a classification of aforementioned problems will be discussed. Research facilities in laboratory of DORMVE and exemplary results, which have already been obtained, will be also presented.
Źródło:: Journal of KONES; 2016, 23, 2; 97-104
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Safety of crews and sz rp vehicles exposed to the impact in asymmetric environment
Autorzy:: Ciekot, Z.
Smoczyński, Z.
Powiązania:: https://bibliotekanauki.pl/articles/246714.pdf
Data publikacji:: 2015
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: asymmetric actions
safety
armour resistance
levels of protections
vehicle equipment
Opis:: In the article, a brief overview of the measures taken in order to improve the safety of the crews and vehicles is presented. A few examples have been shown. The analysis of the attacks impact on the vehicles was performed on the basis of Polish Military Contingents in Iraq and Afghanistan, In addition, the determinants of endangering of the crews are presented and the resolutions that were undertaken are discussed. It should be noted, that in today's armed conflicts, the safety of the soldiers pursuing combat jobs is a priority. Therefore, the most important issue is to meet the requirements for vehicles security levels. An appropriate vehicle protection level should be taken into account during the determination of the technical assumptions and in the next step verified while the prototype testing in research and development centres. It is assessed that the use of various systems and means of vehicle protection in the new 20 the century have been inspired by operations carried out in Iraq and Afghanistan, where the classics faced the new unpredictable form of combat. However, is unconventional, asymmetric war something new? This is a typical guerrilla war run by the other side by means available for them. It seems that the coalition was not prepared for that form of operations in many regards.
Źródło:: Journal of KONES; 2015, 22, 1; 63-74
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Analiza wpływu warunków atmosferycznych na opór aerodynamiczny autobusu miejskiego
Analysis of the influence of the atmospheric conditions on the city bus aerodynamics
Autorzy:: Paszko, M.
Powiązania:: https://bibliotekanauki.pl/articles/309602.pdf
Data publikacji:: 2016
Wydawca:: Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:: opór aerodynamiczny
termodynamika
aerodynamika pojazdu
aerodynamic resistance
thermodynamics
aerodynamics of vehicle
Opis:: W niniejszym artykule przedstawiono analizę wpływu warunków atmosferycznych na poziom oporów aerodynamicznych autobusu miejskiego na przykładzie Mercedesa Conecto użytkowanego przez Miejskie Przedsiębiorstwo Komunikacyjne w Lublinie. Warunki brzegowe do obliczeń opracowano na podstawie danych z Krajowego Instytutu Meteorologii i Gospodarki Wodnej oraz serwisów pogodowych.
This paper presents an analysis of the impact of weather conditions on the level of aerodynamic drag of a city bus on the example of Mercedes Conecto model exploited by the Municipal Transport Company in Lublin. The boundary conditions for the calculation were based on data from the Institute of Meteorology and Water Management and weather services.
Źródło:: Autobusy : technika, eksploatacja, systemy transportowe; 2016, 17, 12; 1266-1268
1509-5878
2450-7725
Pojawia się w:: Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Investigation of human body exposed to blast wave derived from improvised explosive devices
Autorzy:: Sławiński, G.
Dziewulski, P.
Niezgoda, T.
Powiązania:: https://bibliotekanauki.pl/articles/246647.pdf
Data publikacji:: 2015
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: vehicle safety
mine resistance
improvised explosive device
occupant safety
FEM analysis
Opis:: The analysis of contemporary military conflicts shows, that the most dangerous threat for soldiers are Improvised Explosive Devices (IEDs). Blast resistance of military vehicles and structures is broadly discussed in many articles. However, information about human body response to impact loading is hard to find and very general. Both experi-mental trials with dummies and numerical analyses are needed. To design and develop better protection system it is necessary to identify and measure the effects of blast wave impact on crew of military vehicle. This paper presents numerical simulation results of special armoured vehicle subjected to mine threat of 8 and 10 kg of TNT. Possible effects of mine explosion on human body are described. Review of modern-mine and IED countermeasure solutions is presented. The analysis is conducted using LS-DYNA explicit code. Only vehicle’s hull is considered with suspension and turret is modelled using mass. Gravity is taken into account. Numerical model of Hybrid-III dummy is used. Accelerations and forces in tibia, neck and spine were calculated. HIC-36 criterion was also evaluated Different types of possible seat configuration are examined. Results show convergence between explosive size and injury risk.
Źródło:: Journal of KONES; 2015, 22, 4; 287-294
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Numerical study on the modification effect of the seat load acting on a soldier during the blast wave derived from IED explosion
Autorzy:: Sławiński, G.
Dziewulski, P.
Niezgoda, T.
Malesa, P.
Powiązania:: https://bibliotekanauki.pl/articles/241536.pdf
Data publikacji:: 2016
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: vehicle safety
mine resistance
Improvised Explosive Device
occupant safety
FEM analysis
Opis:: The structure of a vehicle located in the explosion area of an anti-vehicle mine or an IED is subject to a strong impact of a blast wave. The explosion of a mine produces a blast wave that travels in all directions at a speed greater than the speed of sound. The level of risk to the crew of a military vehicle depends on their distance from the place of detonation, on the vehicle’s design and in particular on the design of the bottom of the hull and on the assembly and type of seats. The article provides the analysis of the impact of a side explosion on the crew of an armoured vehicle. Since the new classified version of the AEP-55 document, which defines the conditions for testing the resistance of military vehicles to explosions affecting their side, is not available, it was assumed in the numerical analysis that the charge weight of the explosive device is 100 kg TNT, placed between the central vehicle axles at the distance of 400 mm from the bottom and 1,000 mm from the lower board. Two cases were analysed: one where the Hybrid III dummy was placed on the reference seat and the other where it was placed on a modified seat. The analysis is conducted using the LS-DYNA explicit code. Only the vehicle’s hull is considered with suspension and the turret is modelled with mass.
Źródło:: Journal of KONES; 2016, 23, 3; 465-472
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Measuring mechanical resistances of a heavy good vehicle by coastdown test
Autorzy:: Skrúcaný, Tomáš
Semanová, Štefánia
Kendra, Martin
Figlus, Tomasz
Vrábel, Ján
Powiązania:: https://bibliotekanauki.pl/articles/102466.pdf
Data publikacji:: 2018
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: mechanical resistance
rolling resistance
coastdown test
heavy goods vehicle
opór mechaniczny
opory toczenia
test rozbiegu
pojazd ciężarowy
Opis:: Mechanical resistance consists of rolling tire resistance and power losses of vehicle drive train. Rolling resistance is done by deformation of vehicle tires on road surface. Power losses represent resistances of bearings and wheels rolling and oil wading. This resistance acts continuously during vehicle wheels rotation. The value of this driving resistance is possible to test by different methods. Laboratory tests on rotating drum or dynamometer are usually used. This paper deals about rare method – coastdown exterior driving test. It was done with a casual truck trailer set. Results of this test method show the value of this resistance forces which are converted into a coefficient of mechanical resistance and discussed in the point of view of rolling resistance coefficient values.
Źródło:: Advances in Science and Technology. Research Journal; 2018, 12, 2; 214-221
2299-8624
Pojawia się w:: Advances in Science and Technology. Research Journal
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Lightweight high performance vests and inserts with Dyneema® UD
Autorzy:: Meulman, H.
Powiązania:: https://bibliotekanauki.pl/articles/237955.pdf
Data publikacji:: 2009
Wydawca:: Instytut Technologii Bezpieczeństwa Moratex
Tematy:: odporność balistyczna
opancerzenie pojazdu
kamizelka ochronna
ballistic resistance
vehicle armour
protective vest
Opis:: For many years Dyneema fabric and Dyneema Uni-Directional composite are used in personal and vehicle armour. Dyneema Uni-Directional composite has proven to be very effective against small arms ammunition, both in soft and hard armour. Vest and inserts with Dyneema® UD has the lowest weight, leading to a high comfort feeling of the user. In this presentation the newest technology developments will be presented on body armour, based on Dyneema ® UD. Not only ballistic resistance will be addressed, showing the light concepts, also other properties like fire resistance will be presented.
Źródło:: Techniczne Wyroby Włókiennicze; 2009, R. 17, nr 2/3, 2/3; 81-82
1230-7491
Pojawia się w:: Techniczne Wyroby Włókiennicze
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Wpływ kierowcy na opór toczenia samochodu
Driver influence on car rolling resistance
Autorzy:: Taryma, S.
Woźniak, R.
Powiązania:: https://bibliotekanauki.pl/articles/315208.pdf
Data publikacji:: 2017
Wydawca:: Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:: kierowca
opory toczenia
pojazd
styl jazdy
driver
rolling resistance
vehicle
driving style
Opis:: W pracy omówiono wpływ zachowań kierowcy na opory toczenia pojazdu w ruchu drogowym. Można tu wyróżnić styl jazdy kierowcy oraz jego dbałość o pojazd. Przedstawiono wzrost oporu toczenia w aspekcie dynamicznego przyspieszania oraz szybkiej jazdy na zakręcie. Przeanalizowano także wpływ na opór toczenia takich czynników jak: ciśnienie w ogumieniu i obciążenie promieniowe, zbieżność kół jezdnych samochodu oraz zużycie ogumienia.
In this paper the influence of driver's behavior on vehicle rolling resistance has been discussed. It has been mentioned: driver driving style and driver's care of his car. The increase of rolling resistance has been shown in terms of dynamic acceleration and fast cornering. The influence on rolling resistance of such parameters as: tire pressure, radial load, tow-in of vehicle wheels and tyre wear were also analyzed.
Źródło:: Autobusy : technika, eksploatacja, systemy transportowe; 2017, 18, 7-8; 225-228
1509-5878
2450-7725
Pojawia się w:: Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Influence of armoured vehicles bottom shape on the pressure impulse
Autorzy:: Barnat, W.
Panowicz, R.
Niezgoda, T.
Powiązania:: https://bibliotekanauki.pl/articles/243701.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: IED
improvised explosive device
mine resistance
armour
deflector
hull design
light armoured vehicle
Opis:: This paper presents the results of a numerical analysis of military vehicles hulls mine resistance. The research concerns armours loaded with blast wave from large IED charges in three cases. First is an explosion in Euler domain without any boundary conditions. Second consists of Euler domain with flat bottom and the ground. Third is simulated Euler domain with ground and deflector. Boundary conditions used both in second and third case resulted in growth of the pressure impulse due to the reflection from a rigid obstacle. In the article different hull bottom shapes are compared. The gap between the bottom and the ground is fixed in all cases. Explosion in Euler domain without limitations is added as a reference. The blast wave caused by the detonation (simulated as a point detonation) propagated in cubic mesh with appropriate boundary conditions. Theoretical solution of spherical non-linearity is given in a form of Taylor equations. It was used to verify the numerical model. The research showed that the ground proximity affects the results of the simulation. The pressure impulse is amplified due to the wave reflection from both the bottom of the vehicle and the ground. As well as that, the study confirmed that the usage of the deflector considerably reduces the impact load to the structure.
Źródło:: Journal of KONES; 2011, 18, 1; 39-46
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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