Temat: impact simulation - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Preliminary investigation of dynamic loads of the crew of the armoured personnel carrier during frontal crash
Autorzy:: Borkowski, W.
Hryciów, Z.
Powiązania:: https://bibliotekanauki.pl/articles/241797.pdf
Data publikacji:: 2008
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: armoured personnel carrier
impact
passive safety
computer simulation
Opis:: On the work one described chosen problems concerning of threats of the crew of the armoured personnel carrier with dynamic loads during crushing the obstacle. One paid attention on the lack of regulations regulative this problems. One described the general construction, and also worked out model of the armoured personnel carrier and crashed object. To the modelling one used the software LS-DYNA, using the method of finite elements. One gave also conditions for carrying out the numeric research. On the work one placed example results of numerical tests, deformations and stresses in the hull of the vehicle and in the crashed gate. One placed also example-courses of the speed and accelerations of chosen elements of the vehicle and people inside. On the basis on received results of simulation research one evidenced high level threats of the crews, liable to be effective with serious offences, particularly of the head and the spine. One qualified also directions and the range of further works targeting the improvement of the safety of the crew, in this taking into account the use of investigative dummy man. To further research one proposed models of dummy man Hybrid III, which for the necessity of taking in to consideration of additional elements of the equipment of soldiers (e.g. the helmet, the weapon, the bullet-proof vest) must be however properly modified. One pointed also on the necessity of working out the additional protective devices and also formulate the methodology of the experimental research.
Źródło:: Journal of KONES; 2008, 15, 4; 57-62
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Investigations of composite energy absorbing elements
Autorzy:: Niezgoda, T.
Barnat, W.
Kiczko, A.
Powiązania:: https://bibliotekanauki.pl/articles/243633.pdf
Data publikacji:: 2008
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: impact test
FEM simulation
passive safety
composite structure
energy absorbing materials
Opis:: In this work the problem connected with an improvement of the road safety through implementation of additional elements absorbing the hitting energy is taken into consideration. The experimental results of a basic absorbing element of the glass epoxy composite are presented. The results of these tests will serve for the construction of a reliable numerical model of a panel of protective elements. The coincidence between the experimental and numerical results is also proved, showing that introduced approach to the modelling of the process of the progressive destruction and the energy absorption by composite elements is not only properly assumed but is very promising for the future. Efforts, which lead to increase the amount of absorbed energy need actions, directed to improving absorbing energy properties of used elements. Therefore, the received results will serve as guidelines for elaboration the methodology of the research structures of that type and also could be used in further research works within the scope of increasing the road security. In the article it is also proved that there is the necessity to conduct the series of comparative experiments and also tests verifying numerical studies at loading speeds, which can be compared with ones in reality, e.g. crash test or shock wave of an explosion. The validated, in such way, method of numerical simulations enables the limitation of costly and long-lasting research of real objects.
Źródło:: Journal of KONES; 2008, 15, 3; 405-409
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Deceleration and deformation during dynamic load of model longitudinals – real conditions and simulation
Autorzy:: Hadryś, D.
Kubik, A.
Stanik, Z.
Łazarz, B.
Powiązania:: https://bibliotekanauki.pl/articles/198624.pdf
Data publikacji:: 2019
Wydawca:: Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:: longitudinal
passive safety
impact energy
dynamic load
simulation
podłużna
bezpieczeństwo bierne
energia uderzenia
dynamiczne ładowanie
symulacja
Opis:: The manner and degree of taking over impact energy by the passive safety elements of the vehicle body is the basis for providing conditions for the survival of people using the means of transport (driver and passengers). The elements specially designed for this purpose in the self-supporting body are longitudinals. Their energy-absorbing properties are designed by using a specific shape, by using appropriate connections of their components and by choosing the right material. Determining the degree to which the vehicle (body) ensures safety during collision requires testing. The most complex and expensive tests are the ones carried out on a complete real object (whole vehicle). The solution worth considering is a bench test of individual body elements designed as energy-consuming (for example, longitudinals). In addition, it is also possible to carry out computer simulations in this area. The purpose of this article was to present and compare the results of dynamic studies on model energy-consuming real objects and compare the results obtained this way with the results of computer simulation in the same range. The scope of work was adopted on this basis: passive safety, model energy-absorbing elements of steel self-supporting vehicle body, dynamic tests, computer simulations. For the purpose of this study, a model of vehicle passive safety elements (model longitudinals) was designed for which dynamic tests were carried out on a specially designed test stand (speed of the hammer was up to 9.7 m/s, impact energy was up to 23.6 kJ). This test stand enabled registration of the deceleration during impact and deformation of the tested object. Next, computer simulations were carried out for geometrically and material-identical models. On the basis of the conducted tests, it was found that it is worth considering the replacement of collision tests of the whole vehicle by tests of its individual components. These tests can also be supported by computer simulations.
Źródło:: Zeszyty Naukowe. Transport / Politechnika Śląska; 2019, 102; 53-64
0209-3324
2450-1549
Pojawia się w:: Zeszyty Naukowe. Transport / Politechnika Śląska
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Results of preliminary experimental research and computer simulation concerning assessment of injury risk of occupants of military off-road vehicle impacting an obstacle
Wyniki wstępnych badań eksperymentalnych oraz komputerowej symulacji zagrożenia osób w trakcie uderzenia w przeszkodę wojskowego samochodu terenowego
Autorzy:: Orłowski, L.
Powiązania:: https://bibliotekanauki.pl/articles/246460.pdf
Data publikacji:: 2007
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: samochód terenowy
uderzenie
bezpieczeństwo bierne
ryzyko obrażeń
symulacja komputerowa
off-road vehicle
impact
passive safety
computer simulation
injury risk
Opis:: A survey was made on the available designs of guard rails, gates and other structures of the type, the "Dzik"-type vehicle might have to ram into during some operations. Basing on the conducted analyses, two typical models of those barriers were constructed. The first, rigid barrier had a form of concrete block of 6000 kg, while the flexible one was made of steel sections. Since no "Dzik" vehicle was available, a series of preliminary experiments were made on a "STAR" truck which had a similar frame and a bumper located at the same level. The vehicle was subjected to a proper load and during the experiment it impacted the constructed barriers. In the course of crash the values of most important parameters (forces, accelerations) were registered. The results obtained allowed for parametrical identification of a numerical model developed using the MADYMO software. Numerical simulations were performed for different crash speed with the numerical models of human and dummies adapted accordingly to take into consideration that the crew is supplied with bullet-proof jackets and helmets. Both the "sled-test" type numerical simulations, in which the accelerations measured in experiment were employed (after proper adjustment, for higher velocities), and simulations of the complete barrier-vehicle-occupant system were performed. Basing on the numerical simulation results the level of risk the crew is exposed to have been estimated, proving the necessity for developing a proper crew protection system. The scope of further experimental and numerical investigations, to achieve the goal, has been determined.
Przeprowadzono przegląd stosowanych rozwiązań w zakresie budowy ogrodzeń, bram i podobnych konstrukcji, dla których może pojawić się konieczność taranowania w trakcie akcji z wykorzystaniem pojazdu typu „Dzik". Na podstawie przeprowadzonych analiz opracowano dwie typowe przeszkody modelowe. Przeszkodę sztywną zrealizowaną w postaci betonowego bloku o masie 6000 kg na betonowym podłożu i przeszkodę podatną w postaci Stalowych kształtowników. Dla tak zbudowanych modeli przeszkód przeprowadzono serie badań doświadczalnych (dla bezpiecznych zakresów prędkości zderzenia) wykorzystując, wobec okresowego braku możliwości użycia pojazdu „Dzik", odpowiednio obciążony samochód STAR o zbliżonej konstrukcji ramy i takim samym poziomie zderzaka. Przeprowadzone badania eksperymentalne, w których rejestrowano przebiegi istotnych wielkości (sił, przyspieszeń) w trakcie zderzeń, pozwoliły na identyfikację parametrów modelu symulacyjnego opracowanego w środowisku systemu MADYMO. Przeprowadzono szereg symulacji komputerowych (dla różnych prędkości zderzenia) z wykorzystaniem komputerowych modeli człowieka i manekinów z bazy MADYMO. Oryginalne modele, opracowane dla zastosowań „cywilnych", zostały odpowiednio zmodyfikowane — uwzględniono fakt wyposażenia załogi pojazdu w czasie interwencji w kamizelki kuloodporne i hełmy. Przeprowadzono zarówno badania typu „sled-test", w których jako wymuszenie wykorzystano bezpośrednio przyspieszenia rejestrowane w czasie badań eksperymentalnych (odpowiednio przeskalowane dla większych prędkości), jak też badania pełnego modelu przeszkoda-pojazd-załoga. Wykorzystując wyniki symulacji komputerowych określono poziom zagrożeń dla załogi pojazdu uzasadniający potrzebę opracowania odpowiedniego systemu zabezpieczenia załogi. Określono również kierunki oraz zakres niezbędnych dalszych prac eksperymentalnych i symulacyjnych.
Źródło:: Journal of KONES; 2007, 14, 3; 485-494
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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