Wszystkie pola: dynamic research - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Numerical research on dynamic loads of wheeled armoured personnel carrier during overcoming terrain obstacles
Autorzy:: Borkowski, W.
Michałowski, B.
Rybak, P.
Wiśniewski, A.
Powiązania:: https://bibliotekanauki.pl/articles/241735.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: numerical research
dynamical loads
wheeled armoured personnel carrier
simulation
Opis:: Paper presents the results of numerical research on the influence of the movement conditions (velocity and various types and parameters of obstacles) on the level of dynamic loads of the body shell and the vehicle crew of the basic version of Wheeled Armoured Personnel Carrier (Wheeled APC) ROSOMAK. The research work was aimed at analysis of the dynamic loads resulting from the overcoming various terrain obstacles. Kinematic constraints acting on suspension used during tests were random and deterministic, e.g. sine, cosine, triangle as well as mixed, imitating fallen tree trunk on smooth surface. Simulations were carried out with the genuine proprietary software for numerical analysis of dynamics of multi-axis vehicles equipped with independent suspension. The paper consists description of the mathematical model of multi-axis vehicle, deterministic and random generated inputs and range of performed tests. Time courses of displacement, velocity, vertical and angular (longitudinal and transverse) accelerations were determined for chosen parts of vehicle. Paper also contains time courses of deflection for every suspension wheel and dynamical reactions of the ground as well as selected time charts and cumulative statistics. Finally paper presents conclusions formulated about dynamic loads of APC ROSOMAK depending on parameters and types of obstacles and vehicle velocity.
Źródło:: Journal of KONES; 2012, 19, 4; 83-92
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Numerical and experimental research on the dynamic loads in military vehicles
Autorzy:: Rybak, P.
Borkowski, W.
Wysocki, J.
Powiązania:: https://bibliotekanauki.pl/articles/949498.pdf
Data publikacji:: 2016
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: military vehicle
armoured vehicle
load
research
modelling
experiment
Opis:: The work presents the fragments of research on the dynamic loads acting on selected military vehicles. Designing new armoured vehicles or introducing modifications is preceded by model tests carried out under various conditions, analysing the effect of dynamic loads which may result during the use of the vehicle, e.g. due to the roughness of the road, firing, IED explosions or the vehicle being hit by a shell. The main purpose of conducting model research and verifying their findings in experimental research is to improve the effectiveness and safety of operation of systems and installations of military vehicles, increase the dynamics of the movement, improve the protection and ensure that the crew is not killed. Among the used models of military vehicles, discrete models are applied, formulated in the adjusted Lagrange description, as well as the models based on the fine element method for highly nonlinear problems and forces acting for a very short time. Due to the unique selection of military equipment, the methods of calculation and analysis of model research (simulations) and experimental research presented in the work are considered qualitative rather than quantitative.
Źródło:: Journal of KONES; 2016, 23, 4; 435-441
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Research of the dynamic properties of structures the models of interpretation
Autorzy:: Wiśniowski, W.
Powiązania:: https://bibliotekanauki.pl/articles/243504.pdf
Data publikacji:: 2008
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport
aviation
vibration
structure testing
resonance analysis
modal analysis
Opis:: Experimental research of the dynamic properties of structures is performed during of prototype perfectioning, current exploitation and even after the withdrawal from the exploitation for the estimation of the residual durabilities. The aim for research of the dynamic properties of structures is the assurance of its safety, reliability, economic management and comfort. Researcher records the amplitudes of vibrations in the function of the actuation frequencies. Local raise of the amplitude is qualified as resonance. From the researcher point of view, the shape of resonance curves justifies the discrimination of two types of phenomena's: „single resonance" and „close frequencies resonance". For better understanding of these occurrences „the models of interpretation" were proposed. Up to three models of interpretation were assigned to the single resonance: one-degree-of-freedom system, one-degree-of-freedom system with share of the backlashes, two one-degree-of-freedom systems with the same frequencies. From above reasoning, the conclusion results that researcher can expect that the preliminary isolated single resonance belongs to one from the three, mentioned above cases. The judgment of these occurrences, just as the disentanglement of relations in the resonance pair with close frequencies, determines next challenge for the researcher.
Źródło:: Journal of KONES; 2008, 15, 3; 561-565
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

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: 5.

Tytuł:: The research on dynamic loads and traction properties of military vehicles in the aspect of improvement of their structures
Autorzy:: Borkowski, W.
Rybak, P.
Hryciów, Z.
Wysocki, J.
Michałowski, B.
Wiśniewski, A.
Powiązania:: https://bibliotekanauki.pl/articles/247931.pdf
Data publikacji:: 2015
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: military vehicle
dynamic loads
traction
model tests
experimental tests
Opis:: Since the beginning of the 90’s, a scientific team in the Motor Vehicle and Transport Institute of the Mechanical Department in the Military University of Technology, has been involved in the model and experimental tests of the existing structures of the military vehicles (tanks, combat infantry vehicles and wheeled armoured carriers) in the aspect of their modernization. A part of works is related to the military vehicles included in the army’s equipment and the other parts are related to newly designed vehicles. In both cases issues related to the behaviour of selected assemblies and the whole vehicle, structure during threats posed by the reality of contemporary battlefield or armed symmetric or asymmetric conflicts are analysed. Selected effects of the tests and analyses will be presented mostly within the qualitative scope due to the data sensitivity. Contemporary design of military vehicles requires involvement of various research methods and specialized calculation software. The results obtained during performed various experimental tests make a valuable basis for verification of numerical models used in design process and multi-option simulation calculations.
Źródło:: Journal of KONES; 2015, 22, 1; 37-46
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: The research of the dynamic load of the power train of the caterpillar tractor Chetra 6C-315
Autorzy:: Shekhovtsov, V.
Sokolov-Dobrev, N.
Shevtchuk, V.
Liashenko, E.
Powiązania:: https://bibliotekanauki.pl/articles/244457.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: dynamic load
power train
dynamic model
torsional vibration
caterpillar tractor
Opis:: The paper describes the developed dynamic model of the caterpiller's power transmission. Its advantage is the integrated dimensional model of caterpillar propeller. Animated motion modelling provides the formation and transfer of kinematic and dynamic disturbances from caterpillar chassis, causing the greatest loadings of the power circuit sections. The principle of power transmission mathematical model’s differential equations forming is described. Result of the model's computational research is a set of oscillograms of the drive wheel’s torque changing for different operating modes. The values of power transmission masses' natural frequencies are obtained. The research of the nature of transmission sections' dynamic loading by torsional vibrations, that arise and spread on the shafting, when the linked track rewinds, is carried out. The diagrams show that local maximums of dynamic coefficients characterize the regimes with high hook load. The increase of torques for these sections happens because of approximation of the peculiar frequency of the system and the frequency of one of the harmonic components of stimulating actions. At this peak, value of the oscillation belongs to the masses, the partial frequencies of which are closest to the frequencies to the stimulation actions. Dynamic load of such sections is quite high. The material of these sections often gets fatigue damage, which can lead to breakdown. The analysis of the diagrams, made for basic operation speeds between 1,0 – 5,5 m/sec showed, that maximal peak values of dynamic coefficients appear on sections between 10 and 59 masses in the transmission. Maximal dynamic load of these sections appear at hook load from 0 to 40 kN.
Źródło:: Journal of KONES; 2011, 18, 1; 535-546
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Research method of dynamic capability of an actuating block of the SSP-FK aircraft fire suppression system in false alarm aspect
Autorzy:: Szelmanowski, A.
Zieja, M.
Głyda, K.
Tokarski, T.
Powiązania:: https://bibliotekanauki.pl/articles/244205.pdf
Data publikacji:: 2016
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport
aircraft fire suppression systems
research
simulation methods
aircraft fire protection
Opis:: Numerous cases of self-activation of the SSP-FK aircraft fire suppression system (including commissioning of valves and extinguishing tanks) testify about the fact that it is not yet fully understood in the technical aspect, and because of the performed role on the aircraft is the basic element to ensure flight safety. Solving problems with false fire signalling of the SSP-FK system is an important issue for the safe operation of aircraft and military helicopters, because it is preventive (to warn the crew of the possibility of fire) and rescue system (aiming at extinguish the fire) in each phase of a flight. In addition, the SSP-FK system is used on many types of military aircraft (including helicopters from W-3/3W/3WA/3PL and Mi/8/14/17/24 family as well as An-28 and Tu-154M aircraft. The paper presents selected results of work in the Air Force Institute of Technology in the study of SSP-FK fire suppression system (as one of the main protection systems on-board) used on many types of military aircraft operated in the Polish Armed Forces. In determining the conditions of the false signalling of fire, simulation models of action blocks implementing of the SSP-FK fire suppression system were developed. The research on simulation models was performed in Matlab-Simulink and Circuit-Maker computing packages. The results of these works were used to diagnose selected modules and blocks of the SSP-FK system during the study of actual cases of their false activation.
Źródło:: Journal of KONES; 2016, 23, 3; 525-531
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: The research of rotating sets in turbochargers, the influence of relative width of sliding bearings with a floating ring on static and dynamic properties
Autorzy:: Cygnar, M.
Aleksander, M.
Mazurkow, A.
Budzik, G.
Powiązania:: https://bibliotekanauki.pl/articles/242325.pdf
Data publikacji:: 2009
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: turbocharger
rotating unit
sliding bearing with a floatin
Opis:: This work is the continuation of the research concerning the dynamic model of a rotating set in turbocharger. In this model masses of rotors and a shaft have been modelled as concentrated masses. The rotating set has been propped on two supports forming lateral sliding bearings with a floating ring bearing. Each bearing is designed including floating ring bearing mass. The shaft of a rotating set spins at angular velocity omega 1 whereas a floating ring bearing spins at angular speed omega 2. A mathematical model constitutes a system of differential equations, mutually coupled. The mathematical model has been solved by determining: acceleration, velocity and displacement in each knot. The paper shows the crucial influence of a bearing relative clearance on static and dynamic properties of a rotating set in a turbocharger. The authors suggest that the rotating set works stably only in these cases as for given parameters, we choose properly oil films' geometry. In the conclusion, the authors formulate proposal that might be usefulfor the designers who deal with these types of bearings. Especially, the mathematical model o f a turbocharger rotating set, work parameters of bearing knots, researches of static and dynamic properties are presented in the paper.
Źródło:: Journal of KONES; 2009, 16, 2; 91-96
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: The initial research on air flows dynamic impact on a ship model of 888 project type
Autorzy:: Mironiuk, W.
Powiązania:: https://bibliotekanauki.pl/articles/247192.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: stability and unsinkability of a warship model
laboratory stand bed
dynamic heel
Opis:: During operation, a ship is open to dynamic effects resulting from specifics of marine environment. Among these effects, wind dynamic impact together with a wavy motion is especially hazardous for the ship. These impacts generate heels to the big angle. The angle of dynamic heel can be determined according to IMO regulation but the real value is different. Determination of a real value of the dynamic angle of heel is possible by executing model tests performed with geometric and dynamic similarity scale taken into consideration. Results of initial research on air flow's dynamic impact on a ship model are presented in the elaboration. The research has been executed at a test stand located in the Polish Naval Academy. Main elements of the stand consist of model basin, ship model of 888 and 660 project type, computer registering parameters of the ship model position, device generating air flow. The ship model of888 project type has been an object of the tests. It was made in a scale 1:50 in respect to a real vessel. Results of executed measurements have been compared with theoretical calculations for an angle of dynamic heel. Input parameters for the tests and calculations have been defined in accordance with recommendations of Polish Register of Shipping (PRS) and IMO [1, 2, 5]. Determination of a heeling moment by wind operation has been a key issue. The executed research has revealed that the way the criteria of the ship's dynamic stability are defined by PRS and IMO takes a certain safety margin into account.
Źródło:: Journal of KONES; 2011, 18, 4; 281-288
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Numerical research of toothed gears geometry influence on power transmission system vibroactivity
Autorzy:: Peruń, G.
Kozuba, J.
Powiązania:: https://bibliotekanauki.pl/articles/245090.pdf
Data publikacji:: 2017
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: power transmission system
toothed gear
dynamic model
Opis:: The article presents results of numerical studies on the influence of selected factors on the dynamic effects and vibroactivity in power transmission system with toothed gear. Optimization of the constructions of the toothed gears is in many cases only possible by applying the numerical methods. Dynamic models allow determining the influence of a range of factors on the dynamic phenomena occurring during work of toothed gear. The studies were performed with use a custom developed dynamic model of a test stand with the gears operating in the circulating power system. It was assumed, that properly defined and identified model can be used to analyse dynamic phenomena occurring in meshing and bearings of toothed gears and allows optimizing their construction, especially allows minimization their vibroactivity. Numerical calculations were based on two sets of input data. Sets of input data consist information on all parameters included in the model, and which were determined during the identification process carried out in laboratory at two test stands. Selected results of simulations presented in this article prove, that identified dynamic model can be used to analysis of the impact of various constructional, technological and operational factors on the vibroactivity of the toothed gear.
Źródło:: Journal of KONES; 2017, 24, 4; 239-246
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Research about possibility of endanger crew of wheeled armoured personnel carrier on vibrations
Badania narażenia załogi kołowego transportera opancerzonego na oddziaływanie drgań
Autorzy:: Simiński, P.
Powiązania:: https://bibliotekanauki.pl/articles/241967.pdf
Data publikacji:: 2007
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: obciążania dynamiczne
obciążania udarowe
badania eksperymentalne
kołowe transportery opancerzone
dynamic load
impact load
experimental researches
wheeled armoured personnel carrier
Opis:: The article presents researches about possibility of endanger crew of wheeled armoured personnel carrier on vibrations, coming from roughness of road. Action of impact loads on vehicle is continuity with changes about intensity and structure. The most important part of impact load is coming from roughness. Two similar vehicles was chosen for researches. Armoured personnel carriers, with were chosen, are use in many countries. The biggest different between them was type of suspension. One of them has modern hydro pneumatic suspension, the second one has classic, with springs and shock absorbers. Researches are helpful in evaluating "quality" of suspension, in some situations. The problem of endanger the crew is very important, because wheeled personnel carriers are more and more popular and they are used by armies of many countries. This type of equipment was used already in The Second World War. From this moment, they were modernised and changed. From several years, older personnel carriers were very intensive changed or there were build many complete new constructions, which are accordance with tactic o, strategy needs.
Źródło:: Journal of KONES; 2007, 14, 1; 349-355
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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