Wszystkie pola: wysocki, J. J. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Load-balanced route discovery for mobile ad hoc networks
Autorzy:: Abolhasan, M.
Lipman, J.
Wysocki, T. A.
Powiązania:: https://bibliotekanauki.pl/articles/309094.pdf
Data publikacji:: 2006
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: ad hoc routing
MANET
load balancing
on-demand routing
protocols
Opis:: This paper presents flow-aware routing protocol (FARP), a new routing strategy designed to improve load balancing and scalability in mobile ad hoc networks. FARP is a hop-by-hop routing protocol, which introduces a flow-aware route discovery strategy to reduce the number of control overheads propagating through the network and distributes the flow of data through least congested nodes to balance the network traffic. FARP was implemented in GloMoSim and compared with AODV. To investigate the load distribution capability of FARP new performance metrics were introduced to measure the data packet flow distribution capability of the each routing protocol. The simulation results obtained illustrate that FARP achieves high levels of throughput, reduces the level of control overheads during route discovery and distributes the network load more evenly between nodes when compared to AODV. This paper also describes a number of alternative strategies and improvements for the FARP.
Źródło:: Journal of Telecommunications and Information Technology; 2006, 1; 38-45
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Chemistry-turbulence coupling in a model of inhomogenously premixed combustion
Autorzy:: Badur, J.
Karcz, M.
Wysocki, T.
Powiązania:: https://bibliotekanauki.pl/articles/1955748.pdf
Data publikacji:: 2003
Wydawca:: Politechnika Gdańska
Tematy:: premixed combustion
turbulence
progress variable
BERL combustion chamber
Opis:: Results of work on an extension of the turbulent flame speed model used for a mathematical description of partially premixed combustion are presented. The approach is based on the concept of internal coupling between the turbulence of the mixed fuel and oxidizer stream with the reaction progress variable. The model after implementation has been calibrated and tested on a BERL benchmark experiment.
Źródło:: TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2003, 7, 3; 337-346
1428-6394
Pojawia się w:: TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Simple computational methods in predicting limit load of high-strength cold-formed sections due to local buckling: a case study
Autorzy:: Bielski, P.
Samson, L.
Wysocki, O.
Czyżewicz, J.
Powiązania:: https://bibliotekanauki.pl/articles/259748.pdf
Data publikacji:: 2018
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: high-strength steel structures
cold-formed thin-walled sections
local buckling
stability of structure
Eurocode 3 safety factor
Opis:: Cold-formed thin-walled sections are prone to local buckling caused by residual stresses, geometrical imperfections and inconsistency of material properties. We present a real case of buckling failure and conduct a numerical and experimental study aimed to identify methods capable of predicting such failures. It is important because designers of structures are getting more FEA-oriented and tend to avoid lengthy procedures of cold-formed structures design. Currently adopted methods are complicated and require patience and caution from a designer which is reasonable in case of the most important structural members but not necessarily so in ordinary design. Since it is important, we offer an insight into several FEA and manual methods which were sufficient to predict the failure while remaining fairly simple. Using a non-uniform partial safety factor was still necessary. We hope that this paper will be of interest for people performing a lot of routine analyses and worrying about reliability of their computations.
Źródło:: Polish Maritime Research; 2018, 4; 73-82
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Experimental investigations of double multi - leaf spring subjected to impact load
Autorzy:: Bogusz, P.
Krasoń, W.
Wysocki, J.
Powiązania:: https://bibliotekanauki.pl/articles/247312.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: double multi-leaf spring
suspension of a motor truck
impact load
experimental investigations
Opis:: The article deals with experimental investigations of a prototype double multi-leaf spring, compound of a fourleaf main spring and a double-leaf supporting spring subjected to an impact test. In real conditions of car movement (e.g. curb, bump), dynamic oscillating loads, which generate dynamic stress in a car suspension affecting other elements of the car, occur. Consequently, effects of coupled oscillations having a great impact on comfort of a driver and passengers can be observed. The research was conducted in the Laboratory of Material and Construction Strength Department of Mechanics and Applied Computer Science (DMACS) in the Faculty of Mechanical Engineering of Military University of Technology. The experiment was carried out on an original construction of a spring impact hammer developed in DMACS. Energy of the impact was set up by changing mass of a beam with beater and beam dropping height. The results were presented in the form of table summaries, time-dependent load and displacement graphs. The methodology of the research presented in the paper and a set of measuring equipment can be utilized to evaluate load and vibrations of any multi-leaf spring under impact load with given energy. The experimental results obtained from the test are supposed to be used to verify and develop FEM model describing a spring under impact load and oscillations.
Źródło:: Journal of KONES; 2012, 19, 2; 45-51
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Analysis of the influence of concrete safety barrier segment length on road safety
Analiza wpływu długości segmentu betonowej bariery ochronnej na bezpieczeństwo ruchu drogowego
Autorzy:: Borkowski, W.
Hryciów, Z.
Rybak, P.
Wysocki, J.
Wiśniewski, A.
Powiązania:: https://bibliotekanauki.pl/articles/1364492.pdf
Data publikacji:: 2014
Wydawca:: Sieć Badawcza Łukasiewicz. Przemysłowy Instytut Motoryzacji
Tematy:: passive safety
crash tests
concrete safety barrier
computer simulation
LS-DYNA
bezpieczeństwo bierne
testy zderzeniowe
betonowe bariery ochronne
symulacja komputerowa
Opis:: The paper presents problems related to road safety in terms of the development of the concrete barriers system, dispersing energy of car collision on the roads with high traffic and high accident risk. Particular attention was paid to barriers' basic parameters - weight and length of the segment. The main objective of the numeric researches was to assess the qualitative and quantitative effects of the car collision with a concrete road barrier in accordance with the standard EN 1317. To the model tests a 900 kg passenger car has been used which allowed to perform TB11 test according to EN 1317-2 standard (initial velocity - 100 km/h). Numerical studies were carried out for concrete segments lengths: 2, 4, 6, 8 m for two selected impact points. Detailed comparisons of simulation test results obtained for individual variants were made on the basis of the acceleration courses of selected car bodywork points, calculated indicators, the trajectory of vehicle movement after collision as well as on the basis of the behaviour of the concrete barriers.
Niniejsza praca stanowi rozwinięcie problematyki bezpieczeństwo ruchu drogowego w aspekcie opracowania systemu betonowych barier ochronnych, rozpraszających energią zderzenia samochodu na drogach o dużym natężeniu ruchu i wysokim zagrożeniu wypadkowym, ze szczególnym uwzględnieniem jej podstawowych parametrów konstrukcyjnych (masy i długości segmentu). Głównym celem przeprowadzonych badań numerycznych było dokonanie oceny jakościowej i ilościowej skutków zderzenia samochodu z betonową barierą drogową zgodnie z obowiązującą normą EN 1317. Obliczenia przeprowa-dzono w systemie LS - DYNA wykorzystującego metodę elementów skończonych. Pojazd badany o masie 900 kg poruszał się z prędkością początkową 100 km/h, a następnie uderzał w system barier. Badania numeryczne zrealizowano dla segmentów betonowych o długościach: 2, 4, 6, 8 m, dla dwóch wybranych punktów zderzenia. Szczegółowych porównań wyników badań symulacyjnych, otrzymanych dla poszczególnych wariantów obliczeniowych, dokonano na podstawie przebiegów czasowych przyspieszeń wybranych punktów nadwozia samochodu, obliczonych na ich podstawie wskaźników, trajektorii ruchu pojazdu po zderzeniu, a także na podstawie zachowania się betonowej bariery ochronnej.
Źródło:: Archiwum Motoryzacji; 2014, 63, 1; 25-34
1234-754X
2084-476X
Pojawia się w:: Archiwum Motoryzacji
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Experimental crash tests involving passenger cars and the prototype concrete protective barrier
Autorzy:: Borkowski, W.
Hryciów, Z.
Rybak, P.
Wysocki, J.
Powiązania:: https://bibliotekanauki.pl/articles/247037.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: experimental tests
test track
concrete protective barrier
crash test
experimental verification
Opis:: The work describes the experimental test methodology and results obtained during the experimental crash tests involving passenger cars and the prototype concrete protective barrier, which was built according to the original design prepared by the authors of this article. The crash tests involving a vehicle and the protective barrier cover the experiment results in three basic areas: severity ofthe collision impact on vehicle passengers, the impact on a vehicle and deformation of the road protective system. Applied testing procedures meet the requirements of the national standards, that make the equivalents of the European standards EN-1317-1:1998, EN-1317-2:1998, EN-J 317-3:2000. The tests have been performed for selected crash criteria (TB11 and TB32), for a normal restrain level (N2), using three passenger's cars (Dodge Neon and 2 units of Suzuki Swift). Applied testing procedures meet the requirements of the national standards [1-5]. The work presents examples of experimental test results in three basie areas: intensity of the crash impact on the vehicle passengers, the impact on a vehicle and deformation of the road protective system. The test results have been presented in a form of courses of speeds and accelerations along the vehicle body axes x, y, z. Acceleration severity index (ASI), theoretical head impact velocity (THIV), post-impact head delay (PHD), vehicle cabin deformation index (VCDI) and deformation levels of the road protective system (W) have been also defined.
Źródło:: Journal of KONES; 2010, 17, 2; 35-42
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Experimental research on the dynamic loads of the wheeled armoured personnel carrier
Autorzy:: Borkowski, W.
Hryciów, Z.
Michałowski, B.
Rybak, P.
Wiśniewski, A.
Wysocki, J.
Powiązania:: https://bibliotekanauki.pl/articles/243711.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: experimental research
dynamic loads
wheeled armoured personnel carrier
acceleration
vibrations
Opis:: The results of the experimental research on the influence of the special vehicle movement conditions on the body shell and the vehicle crew dynamic load will be presented in the paper. ROSOMAK Wheeled Armoured Personnel Carrier (Wheeled APC), the basic version, was the subject of the research. The research work was aimed at analysis of the dynamic loads resulting from the deterministic inputs and driving on the selected types of surfaces generating random kinematic inputs. The personnel carrier service conditions, measuring apparatus, and testing methods will be described. The vertical accelerations of the selected points of the vehicle, and deflection of the prime and second suspension of the vehicle left side were measured. The time and the acceleration RMS value spectrum charts for the selected implementations will be presented. The cumulative statistics will be shown in the form of a table. The conclusions regarding the influence of the road surface on the personnel carrier driver's working comfort will be formulated. The assessment of the suspension quality will be included in the conclusions. Driving on the smooth surface is comfortable. However, the road surface worsening causes decreased proficiency sense until the exposure limit boundary is reached when the vehicle drives on a poor quality cobble road with 50 km/h speed. The vehicle basic version is not fitted with the seats for assault troops, therefore the influence of the road irregularities on the centre of mass of the body shell, and the driver's and commander's seats were determined. It is recommended to make further tests on the personnel carrier combat and special versions.
Źródło:: Journal of KONES; 2011, 18, 1; 69-76
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Experimental researches of dynamic loads of armoured personnel carrier and its crew during collision with rigid obstacle and all - terrain vehicle
Autorzy:: Borkowski, W.
Hryciów, Z.
Rybak, P.
Wysocki, J.
Wiśniewski, A.
Powiązania:: https://bibliotekanauki.pl/articles/242892.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: armoured personnel carrier
dynamic load
dummy
crash test
passive safety
Opis:: The paper presents problems related to dynamic loads of armoured personnel carriers design as well as soldiers located inside them. During tactical operation, there is often the need for ramming other vehicles or terrain obstacles in order to provide road possibility. The lack in armoured vehicles, commonly used in cars crumple zones, will result in large values of accelerations. This can cause significant risk to the crews of vehicles. In order to assess the exposure of soldiers while overcoming terrain and engineering obstacles experimental studies were performed covering a carrier’s collision with a rigid barrier and ramming of all-terrain vehicle. In the paper the research conditions and used measurement equipment were described. A four-wheel SKOT personnel carrier and Tarpan Honker car, out of service, was used for the tests. The tests were carried out within the area of the Military Institute for Armoured and Automotive Technology in Sulejówek. During crash tests, anthropomorphic measurement equipment – Hybrid III 50th Male Dummy type – was used for recording the values of loads affecting the soldiers. The article presents some results of experimental studies. The values of the carrier’s body accelerations in driver’s and landing troop compartment were compared as well as dynamic loads of test dummies. The results obtained during vehicle ramming prove that these types of actions do not cause serious threats for the members of the carrier crew.
Źródło:: Journal of KONES; 2013, 20, 3; 71-78
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Influence of operation conditions on the wheeled armoured carrier characteristics
Autorzy:: Borkowski, W.
Rybak, P.
Hryciów, Z.
Wysocki, J.
Michałowski, B.
Powiązania:: https://bibliotekanauki.pl/articles/245920.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: wheeled armoured carrier
characteristics
traction features
loads
Opis:: Participation of Polish military contingent in peach and stabilization missions resulted in the need for new vehicles. Special vehicles - multiaxle ones of good protection abilities and high motion dynamics - have to be adjusted to operation in various climate and terrain conditions. The work presents operation conditions of the wheeled armoured carriers resulting from the execution of required tasks. Threats resulting from driving on unpaved roads and wilderness have been presented as well as their influence on the motion dynamics, technical condition of vehicle chassis, durability and reliability. It is particularly important for the passenger safety. A mathematical vehicle model, imitating special multiaxle vehicle, have been presented. Calculation abilities of original numerical software for the analysis of vehicle traction characteristics have been presented. Mechanical and hydromechanical drive vehicles can be analysed. Examples of calculation results, illustrated on the diagrams, have been also included. Influence of selected technical - structural parameters on a multiaxle vehicle has been shown. Their influence on traction characteristics and dynamic loads affecting the vehicle, its internat equipment and the passengers has been estimated.
Źródło:: Journal of KONES; 2010, 17, 1; 59-65
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Mathematical model of stabilising and tracking control system in main battle tank
Autorzy:: Borkowski, W.
Hryciów, Z.
Papliński, K. M.
Rybak, P.
Wysocki, J.
Powiązania:: https://bibliotekanauki.pl/articles/244961.pdf
Data publikacji:: 2015
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: main battle tank
stabilising and tracking control system
tank gun stabiliser
Opis:: The aim of this researches was to identify all functional blocks of tank gun stabiliser 2E28M (installed in tanks T-72 and PT-91 Twardy) in order to build mathematical model of the system. The tank gun stabiliser is an electro-hydraulic control system, which makes possible aiming at a target, tracking of a target and stabilise of a given gun and turret angular position. The two-axial stabiliser consists of two separate control systems to stabilise the gun in elevation and the turret (with gun) in azimuth. After detailed analysis of construction and work principles, functional schemes of investigated systems were build. Afterwards, static and dynamic characteristics of functional parts of the system were determined. Because of obtained characteristics and based on the knowledge about the system feedbacks, structural schemes and mathematical models of foregoing stabiliser were derived. The results of numerical computations were compared with the existing results of experimental tests carried-out on a real plant. The results of experimental and model simulation investigations showed that the mathematical model and its numerical implementation were correctly developed.
Źródło:: Journal of KONES; 2015, 22, 4; 43-52
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Numerical simulation of the standard TB11 and TB32 tests for a concrete safety barrier
Autorzy:: Borkowski, W.
Hryciów, Z.
Rybak, P.
Wysocki, J.
Powiązania:: https://bibliotekanauki.pl/articles/247654.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: road safety barrier
crash tests
computer simulation
LS-DYNA
Opis:: The work presents the traffic safety issue related to a use of the road protective barriers. It describes a purpose and tasks that should be fulfilled by the safety system. Conditions of crash tests and their evaluation according to the requirements of the existing standard documents are also presented. The purpose of the work was to evaluate the influence of applied barrier type on the car collision process. A barrier composed of the segments that can move on the ground due to the impact force and a barrier fixed to the road surface were assumed for the model tests. The modelling was carried out by means of the LS-DYNA sofrware, using the finite element method. The tests were performed for two types of cars, mass of 900 kg and 1500 kg. The work includes the numerical test results, deformations of car bodies and barrier displacement. Examples of velocities and acceleration courses of selected vehicle elements and the ASI index, calculated on their basis, used for evaluation of the passenger danger level were also presented. Obtained results indicate a significant influence of the barrier installation method (joint with the road) on the collision process course and dynamic loads affecting the car passengers. They also indicate directions of safety improvement.
Źródło:: Journal of KONES; 2010, 17, 4; 63-71
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Obciążenia dynamiczne gąsienicowego wozu bojowego
Dynamic loads of tracked combat vehicle
Autorzy:: Borkowski, W.
Rybak, P.
Hryciów, Z.
Wysocki, J.
Michałowski, B.
Powiązania:: https://bibliotekanauki.pl/articles/210283.pdf
Data publikacji:: 2010
Wydawca:: Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:: budowa i eksploatacja maszyn
gąsienicowy wóz bojowy
obciążenia
structure and operation of machines
tracked combat vehicle
dynamic loads
Opis:: Wśród gąsienicowych wozów bojowych szczególnie wysokimi walorami wyróżniają się czołgi i wozy bojowe piechoty. Są one uniwersalnymi środkami walki, działającymi skutecznie zarówno w działaniach zaczepnych jak i w obronie, w różnych warunkach, stanowiąc podstawowy środek walki wojsk lądowych. O przydatności gąsienicowych wozów bojowych decydują ich główne cechy bojowe, do których zalicza się siłę ognia, opancerzenie i ruchliwość. Ruchliwość odzwierciedla zdolności dynamiczne i manewrowe. To od niej przede wszystkim zależy tempo działań bojowych, możliwość manewru wojskami oraz zdolności przekraczania różnych przeszkód, zarówno naturalnych jak i sztucznych. Właściwości dynamiczne wozów bojowych to głównie ich prędkości maksymalne i średnie w terenie oraz zdolność przyspieszania. Na ruchliwość duży wpływ ma silnik, układ napędowy i gąsienicowy układ jezdny. Aby zapewnić dużą ruchliwość, układ napędowy powinien charakteryzować się wysokim wskaźnikiem mocy jednostkowej, układ jezdny natomiast powinien stwarzać warunki płynnej jazdy oraz amortyzację wstrząsów i szarpnięć. Ruchliwość wozów bojowych ma istotny wpływ na żywotność czołgu oraz prawdopodobieństwo ich trafienia, jest elementem tzw. obrony czynnej. Wzrost ruchliwości bardzo ściśle wiąże się ze wzrostem obciążeń dynamicznych, które działają na kadłub pojazdu i jego załogę oraz wyposażenie wewnętrzne. W pracy podjęto próbę oceny wpływu niektórych parametrów na obciążenia dynamiczne gąsienicowego wozu bojowego, w oparciu o analizę stanu zagadnienia jak i badania własne.
Tanks and infantry fighting vehicles stand out with especially high advantages from among other tracked combat vehicles. They are universal combat means, operating effectively in offensive operations as well as in defence, in various weather conditions, providing the most essential combat weapons of the army. Usefulness of those vehicles is determined by their fire power, armour and mobility, which rank among the main combat features. Mobility represents dynamic and manoeuvre capabilities. On mobility first of all depends military action pace, possibility of troops movement and ability of clearing various, natural or artificial obstacles. Dynamic capabilities of combat vehicles include their peak and mean velocities in field as well as acceleration ability. Significant influence on mobility of the vehicles have the proper engine, power drive and suspension system. To provide suitable mobility of the vehicle, the power drive system should be characterized by high power ratio, whereas suspension system should ensure conditions of fluent motion and absorption of shocks and rattles while moving. Mobility of combat vehicles has real influence on their survival at battlefield and probability of avoiding the hit by enemy means. Increase in mobility is strictly connected with the increase in the dynamic loads, which affect the hull, equipment and the crew of the vehicle. In the paper, an attempt to estimate the influence of chosen parameters of the vehicle on its dynamical loads was undertaken. The analysis of professional literature, as well as the results of authors' own research were considered.
Źródło:: Biuletyn Wojskowej Akademii Technicznej; 2010, 59, 1; 333-345
1234-5865
Pojawia się w:: Biuletyn Wojskowej Akademii Technicznej
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Operational loads of combat vehicles
Autorzy:: Borkowski, W.
Rybak, P.
Hryciów, Z.
Wysocki, J.
Papliński, K.
Michałowski, B.
Powiązania:: https://bibliotekanauki.pl/articles/244652.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: combat vehicles
maintenance
modeling and experimental research
Opis:: The paper describes dynamic load-generating sources and their effects on combat vehicles (CV), placed people and equipment within it. The variety of the operation conditions causes a complex dynamic load, both in terms of level, direction and distribution. The effects of the impacts are shown in photographs. It is important to know the level of loads in terms of the development of resistant and safe high-speed tracked combat vehicles. The selected results of its own researches of high-speed tracked combat vehicles were presented. Research were carried out under conditions similar to those typical for this class of vehicles, both during the rides on the road, the ground and obstacles on the specially constructed for this purpose. The results of research and analysis are compared in the form of graphs and the estimated value. The paper presents angular movement of the hull of the CV as well as displacements of carrying wheels during overcoming a single obstacle, elastic characteristics of hydro-pneumatic suspension components, distribution of pressure acting on a selected area of the bottom of the hull after mine explosion and power spectral density estimator of tank gun vibration as well as being the source longitudinal vibration of the hull tank. The presented scope and methodology allows the multi-variants investigation and estimate the loads of the hall, interior fittings and people in special vehicles and other objects that may be exposed to this type of loads.
Źródło:: Journal of KONES; 2011, 18, 1; 77-84
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Prototype articulated joint in connections of the concrete protective barrier
Autorzy:: Borkowski, W.
Hryciów, Z.
Rybak, P.
Wysocki, J.
Powiązania:: https://bibliotekanauki.pl/articles/244656.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport
road safety
concrete protective barrier
crash test
articulated joint
Opis:: The work describes methodology of selection of a prototype articulated joint used to connect the segments of the concrete protection barrier. The barrier and the joint have been made according to the original project of the authors of this paper. Dimensions of the component elements of the joint were defined on the basis of numerical calculations in LS-DYNA system, using finite element method. They also allowed to identify places sensible to damage. Based on the project, the experimental tests have been performed for the joint strength to stretching. The tests performed on the resistance machine showed improper technology and poor quality of welds joining individual elements, particularly the bolt with connecting steel. Results of these tests made the basis for introducing the changes to the project. Repeated tests confirmed their rightness. The final evaluation of quality and usefulness of the prototype articulated joint in the connections of movable protection barrier were defined during the crash tests on the test track of the Certified Research Laboratory of the Research Institute for Roads and Bridges. The crash tests were performed for selected collision criteria (TB11 and TB32), normal restrain level (N2), using three passengers cars. Applied concrete barrier test procedures are in accordance with the requirements of national standards, that make the equivalents of the European standards.
Źródło:: Journal of KONES; 2011, 18, 1; 85-92
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Selection of elastic suspension elements for the special use vehicle
Autorzy:: Borkowski, W.
Michalowski, B.
Paplinski, K.
Rybak, P.
Wysocki, J.
Powiązania:: https://bibliotekanauki.pl/articles/242198.pdf
Data publikacji:: 2009
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: special vehicle
suspension
spring
elastic element
lateral tilt stabilizer
Opis:: The work analyzes the possibility of using a truck chassis in terms of installing a specific device. As part ofwork was selected the vehicle, identified the necessary geometric parameters and the mass allowing of modernization, with particular emphasis on the required structural changes in the front and rear suspension. To this were used, the developed two phase methodology of calculation of the metal elastic elements (springs) and mechanical lateral tilt stabilizers. Results of numerical calculations are presented in the form of recommendations to redesign of the front and rear suspension. However, in the front suspension should be made a new spring and a mechanical lateral tilt stabilizer, while rear spring suspension meets the requirements in terms of elastic characteristics (adequate the coefficient of rigidity) is requiredonly adjustment of the static deflection of the suspension for example by adjusting the radii of leaf of the spring. Because of the design solution of the driving rear axle (so called driving axle trolley) was not proposed mechanical lateral tilt stabilizer. Paper present diagram of the forces acting on a vehicle with special equipment, results of the calculation loads acting on the suspension components fitted to a lorry with a special device, results of the calculation loads acting on the base vehicle suspension components, the basic parameters of a lorry with special hull and performance graph of the front suspension leaf spring resilience.
Źródło:: Journal of KONES; 2009, 16, 3; 47-54
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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