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1

Experimental and numerical investigation on the multi-optimization of reinforcing the side members of the vehicle structure

Zahedan Nima, Ahmadi Hamed, Liaghat Gholam Hossein

Archives of Civil and Mechanical Engineering

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2022

|

Vol. 22, no. 1

art. no. e25, 2022

EN

The aim of this study is to investigate the improvement in the strength of a top-hat profile hollow-section beam used in a vehicle structure by attaching different shapes of internal reinforcements. The base structure of the beam was first considered as a hat-shape structure which was jointed to a flat plate using spot-welds. Three types of sheet metal reinforcements were formed and attached inside the beam’s structure. Then, they were tested experimentally under low-velocity lateral impact. Also, a numerical simulation is being developed using LS-DYNA explicit code and validated using experimental data. Valid numerical configuration is used to conduct an optimization study on cross-sectional shape of the internal reinforcing component. Optimizations are carried out using single- and multi-objective methods based on Genetic Algorithm approach and the suggested optimum solutions are compared with experimental results. Moreover, to discuss the feasibility of applied reinforcements on side section of a vehicle’s body-in-white, a realistic side-pole crash test is simulated using a validated vehicle model and performance of improved chassis is compared with basic model and results are presented, discussed and commented upon.

2

Projektowanie drogowych tymczasowych barier ochronnych dla samochodów osobowych

Kaszyńska Maria, Zieliński Adam, Skibicki Szymon

Przegląd Budowlany

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2021

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R. 92, nr 5-6

18--25

PL

W artykule omówiono proces projektowania innowacyjnej tymczasowej bariery ochronnej spełniającej wymagania normy EN 1317 i zapewniającej poziom bezpieczeństwa T1/W1. Proces projektowy wspomagany był przez analizy teoretyczne, modelowe, badania laboratoryjne i symulacyjne (MES). Symulacja numeryczna testów zderzeniowych dała zbliżone rezultaty co do długości kontaktu pojazdu podczas zderzenia, prędkości pojazdu po zderzeniu, deformacji bariery, rozkładu uszkodzeń oraz czasu uderzenia, do wartości uzyskanych w rzeczywistych testach zderzeniowych przeprowadzonych na specjalnym torze. Zachowanie systemu bariery podczas symulacji zderzenia w programie LS-DYNA zostało dobrze odwzorowane. Zaprojektowana bariera po rzeczywistych testach zderzeniowych uzyskała certyfikat potwierdzający wymagane dla danej kategorii barier parametry i została wdrożona do produkcji.

EN

The paper presents a design procedure for an innovative temporary traffic barrier according to EN 1317 with a safety level T1/W1. The design involved theoretical analysis, modeling, lab tests and simulations (FEM). Numerical simulation of the crash tests accurately predicted the contact length for a vehicle, vehicle speed after crash, deformation of the barrier, location of deformation and time. The crash test was carried out on a designated test track. The simulated behavior of the barrier using LS-DYNA program was confirmed by tests. After tests, the designed barrier received an official certification required for commercial implementation.

3

Analysis of injuries of a driver of a roll caged car sustained during a rollover crash

Peliński Jakub, Dymek Mateusz

Aktualne Problemy Biomechaniki

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2020

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z. 19

27--34

PL

Praca przedstawia badania dotyczące ustalenia rozległości obrażeń (Siła normalna oraz tnąca w odcinku szyjnym kręgosłupa oraz ugięcie klatki piersiowej) kierowcy samochodu wyposażonego w klatkę bezpieczeństwa podczas dachowania. Do symulacji został użyty model dyskretny 50 centylowego manekina Hybrid III. Test dachowania pojazdu (1996 Dodge Neon) został przeprowadzony przy użyciu Metody Elementów Skończonych w programie LS-DYNA.

EN

The aim of the study is to analyze the extent of injuries sustained by the driver during a crash rollover. A safety cage for 1996 Dodge Neon was designed following FIA guidelines as well as a seat. 50th percentile male HYBRID III ATD model was utilized. The crashworthiness of the test setup and verification of the injury measures were examined utilizing the Finite Elements Method in LS-DYNA software. Biomechanical injury measures that were investigated include neck normal and shear force and chest deflection.

4

Zaawansowane symulacje numeryczne MES dynamiki mostów z wykorzystaniem procedury explicit

Miśkiewicz Mikołaj, Bruski Dawid, Chróścielewski Jacek, Wilde Krzysztof, Grębowski Karol

Mosty

|

2019

|

nr 1

38--41

PL

Dostęp do mocy obliczeniowej super komputerów oraz możliwość wykorzystania nowoczesnych systemów, np. takich jak Ls-Dyna, pozwala na uzyskanie niezwykle szczegółowych rozwiązań bardzo skomplikowanych problemów inżynierskich.

EN

The article presents some remarks on the dynamic simulations of bridges in the Ls-Dyna system. Some results of two dynamic problems are presented. The first example concerns a viaduct that was hit by a vehicle passing under it. The second one relates to the design of a concrete multi-span bridge subjected to earthquakes of various intensity.

5

Evaluation of Pressure Distribution in Buried Pipes with Liquid in the Explosion

Parviz M., Aminnejad B., Fiouz A. R.

Archives of Civil Engineering

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2019

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Vol. 65, nr 3

3--14

EN

In this Paper, a parametric study on pipes buried in soil was performed illustrating the results of blast loading. Effects of various parameters such as the physical properties of water, oil, gas, air, soil, pipes, and TNT have been investigated. The arbitrary Lagrangian-Eulerian (ALE) method was employed using LS-DYNA software. The maximum pressure in a buried pipe explosive was observed at an angle of about 0° to 45° and the minimum pressure occurred at an angle of about 45° to 90°. Therefore, all figures in this study illustrate that fluid pressure levels in buried pipes can help in their stabilization. In generally, by increasing the 1.23 times of liquid density under the explosion, the pressure levels in the soil decreased by 1.3 percent. The gas pressure has been increasing more than oil and water pipes 39.73 and 40.52 percent, respectively.

6

Symulacje numeryczne testów zderzeniowych barier ochronnych

Wilde K., Bruski D., Burzyński S., Chróścielewski J., Pachocki Ł., Witkowski W.

Mosty

|

2018

|

nr 6

64--68

PL

W pracy przedstawiono metodykę budowy modelu obliczeniowego ukierunkowanego na badania zderzeniowe w środowisku metody elementów skończonych. Opisano etapy tworzenia takiego modelu, jego modyfikacji oraz sprawdzania poprawności przeprowadzonej symulacji, a także przedstawiono kilka autorskich przykładów zastosowania proponowanych obliczeń do badania barier ochronnych.

EN

The paper presents the possibilities of using numerical simulation to test the properties of road safety equipment. Nowadays safety barriers must pass specialist crash tests, what allows them to be commonly used. Because of the high cost of crash tests, more and more manufacturers and other investigators of traffic barriers are supported by numerical simulations. The article presents the methodology of creating a numerical model of crash test as well as several examples of numerical calculations.

7

Walidacja badań eksperymentalnych zjawiska wybuchu z wykorzystaniem metody elementów skończonych

Malesa P., Sławiński G., Bogusz P., Świerczewski M.

Modelowanie Inżynierskie

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2018

|

T. 35, nr 66

46--52

PL

W pracy przedstawiono podejście numeryczne do modelowanie zjawiska inicjacji oraz propagacji fali uderzeniowej pochodzącej od wybuchu TNT w aspekcie badań poligonowych. Przedstawiono wyniki analiz numerycznych modeli opracowanych na podstawie badań eksperymentalnych odzwierciedlających warunki badań poligonowych. Symulacje przeprowadzono przy użyciu dwóch algorytmów dostępnych w kodzie obliczeniowym LS-Dyna - podejścia ALE (Arbitrary Lagrangian-Eulerian) oraz funkcji CONWEP. Otrzymane charakterystyki zmiany ciśnienia dla punktów pomiarowych odpowiadających miejscu mocowania czujnika ciśnienia w warunkach poligonowych pozwolą na poprawną walidację badań eksperymentalnych zjawiska wybuchu. Do zrealizowania postawionego zadania wykorzystano oprogramowanie Hypermesh, LS-Prepost oraz LS-Dyna.

EN

The paper presents the results of numerical analyses of models developed based on experimental tests representing the field tests conditions. The paper presents a numerical approach to modelling the phenomenon of initiation and propagation of a wave from TNT explosion in terms of field tests. The simulations were conducted with the use of two algorithms implemented in LS-DYNA code: ALE (Arbitrary Lagrangian-Eulerian) method and CONWEP function. The obtained characteristics of pressure change for measurement points corresponding to the location of pressure sensor fixture in the field tests conditions will allow accurate validation of experimental tests of an explosion phenomenon. Hypermesh programme was applied to accomplish the given task, LS-Prepost to develop a model and analyses the results and LS-Dyna as a solver for conducting the calculations.

8

Symulacje numeryczne jako wsparcie badania właściwości barier ochronnych

Wilde K., Bruski D., Burzyński S., Chróścielewski J., Pachocki Ł., Witkowski W.

Magazyn Autostrady

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2018

|

Nr 6

45--51

PL

Artykuł przedstawia możliwości wykorzystania symulacji numerycznych do badań efektywności urządzeń bezpieczeństwa ruchu drogowego w aspekcie sposobów ich konfigurowania. Obecnie w celu dopuszczenia do stosowania bariery ochronne muszą przejść specjalistyczne testy zderzeniowe. Ze względu na wysoki koszt tych badań coraz częściej producenci barier oraz inne podmioty odpowiadające za urządzenia bezpieczeństwa ruchu drogowego (brd) wspomagają się symulacjami komputerowymi. W artykule przedstawiono metodykę budowy modelu obliczeniowego do symulacji testu zderzeniowego wraz z kilkoma przykładami jego zastosowania. Wskazano również na istniejące prawne uwarunkowania wykorzystania symulacji numerycznych w procesie certyfikacji barier.

EN

The paper presents the possibilities of using numerical simulation to test the properties of road safety equipment. Nowadays safety barriers must pass specialist crash tests, what allows them to be commonly used. Because of the high cost of crash tests, more and more manufacturers and other investigators of traffic barriers are supported by numerical simulations. The article presents the methodology of creating a numerical model of crash test as well as several examples of numerical calculations.

9

Numerical simulations of a bird strike against a helicopter windshield

Ćwiklak J.

Journal of KONES

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2018

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Vol. 25, No. 2

81--88

EN

The article presents simulation results of a bird strike with a helicopter windshield of small helicopter category. It turns out that there are no certification requirements regarding windshield of this category. Therefore Agusta A109 helicopter as a representing this helicopter category has been chosen for researcher. The simulations were conducted on the basis of LS-DYNA software by means of the SPH method for bird model shape of cylinder with hemispherical endings for the speed of Vc = 285 km/h. The analyses regarded various angles of the bird model impact into windshield. As a result of the simulations, comparative analyses in the aspect of time curves of the kinetic energy, velocity, and windshield deformation were achieved. The analysis shows that at smaller angles of attack, the bird’s model has a higher speed at the moment of impact, and thus greater kinetic energy, because it did not lose speed as a result of the collision. In addition, the deflection of the windshield is smaller. In some cases, the deflection of the windshield may be observed, which indicates the elastic response of the system. In case of impact in the normal direction to the surface of the glass, the bird’s model practically pierces it. The use of a thicker pane translates into less deformation of the pane, but causes its destruction at the connection point with the helicopter carrier structure.

10

Out-of-plane static crushing of thin-walled honeycomb structures. Numerical and experimental investigation

Ciepielewski Radosław, Dybcio Paweł, Barnat Wiesław

Advances in Science and Technology. Research Journal

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2018

|

Vol. 12, no 3

96--105

EN

Aim of presented study was to compare plateau stress in honeycomb structures under out-of-plane load calculated using Wierzbicki formula with numerical simulations validated using experimental trials. ALUBOND® Alucore honeycomb structure was examined. The results of theoretical, experimental and numerical investigation are reported. Two methods of modeling core behavior were evaluated using simulations. Full core geometry and simplified Y-shaped element were analyzed. Both approaches were compared with experimental out-of-plane compression tests. Aim of the study was to determine the influence of core geometrical parameters on obtained plateau stress value. Various foil thicknesses and cell sizes were studied numerically. The results showed, that initial and final deformation mode strongly depends on the geometry of the honeycomb structure. Force required to crush the core grew with increase of wall thickness, and decreased with increase of cell size. Calculations were performed using an implicit integration scheme implemented in the LS-DYNA software. Research showed the presence of plateau relationship between stress and geometric dimensions and structure response. Good agreement between results obtained by all methods was achieved. Basing on the results, conclusions concerning modeling honeycomb materials were drawn.

11

Wpływ miejsca uderzenia w stalową barierę ochronną oraz uwarstwienia gruntu na wartość parametru ASI podczas testu TB11

Bruski D., Burzyński S., Chróścielewski J., Skwira K., Wilde K., Witkowski W.

Modelowanie Inżynierskie

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2017

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T. 32, nr 63

24--31

PL

Bariery stalowe są najczęściej stosowanym rodzajem barier ochronnych. Ich podstawowym zadaniem jest zapobieganie zjechaniu pojazdu z drogi w miejscach szczególnie niebezpiecznych. Bariery stosowane na europejskich drogach muszą spełniać wymagania norm EN 1317. Jednym z najważniejszych parametrów pozwalających klasyfikować bariery ochronne pod kątem zapewnienia stopnia bezpieczeństwa w trakcie incydentu jest wskaźnik intensywności przyspieszenia ASI, który pozwala określić wpływ zderzenia na osoby znajdujące się wewnątrz pojazdu. Symulacje numeryczne testów zderzeniowych są coraz powszechniej stosowane do oceny właściwości barier ochronnych. W pracy przedstawiono wpływ miejsca uderzenia pojazdu w stalową barierę ochronną oraz uwarstwienia gruntu, w którym posadowiona jest bariera, na wartość wskaźnika ASI podczas testu zderzeniowego TB11.

EN

Steel barriers are the most commonly used type of safety barriers. Their basic task is to prevent the errant vehicle from getting off the road in places which are particularly dangerous. Barriers used on European roads must fulfill the requirements of EN 1317 standards. One of the most important parameters that describes the safety barriers is the Acceleration Severity Index (ASI) which allows for assessment of the injuries of occupants during impact. Numerical simulations of crash tests are increasingly used to evaluate the properties of safety barriers. This paper presents the result of the influence of impact location on the steel safety barrier and the stratification of the ground on the ASI value during TB11 test.

12

Experimental and numerical investigation of connector with elastomer joint

Sławiński G., Malesa P., Świerczewski M., Bogusz P.

Journal of KONES

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2017

|

Vol. 24, No. 3

283--289

EN

This article presents works associated with the design, numerical analyses and experimental tests of an energyabsorbing mat designed for increasing the safety of the soldiers inside military vehicles, especially their legs. One of the most important branches of engineering interests is high technologies accompanying the safety of soldiers. Energy absorbing mats are one of an additional equipment of a military vehicle, which is directly targeted to increase leg safety during explosion of IED (Improvised Explosive Device) under vehicle. The presented invention allows protection legs of the crew’s feet resting on the floor of the vehicle during explosion of a mine or IED. In most solutions, crewmembers’ foot rests directly on the floor, causing serious injuries. The value of the load on the metatarsus and tibia is closely related to the overall vehicle structure, which generally has limitations in the use of available external and internal protection solutions. Energy absorbing mats are a universal solution because they are adaptable to any type of vehicle. Their role is particularly important in flat-bottomed armoured vehicles. The article will show the results of the analysis showing how the mat works. Experimental results will be compared with the results of numerical analysis. The analysis is conducted using the LS-DYNA explicit code.

13

Curb-to-barrier face distance variation in a TB51 bridge barrier crash test simulation

Wilde K., Jamroz K., Bruski D., Burzyński M., Burzyński S., Chróścielewski J., Witkowski W.

Archives of Civil Engineering

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2017

|

Vol. 63, nr 2

187--199

EN

This paper addresses the problem of road safety regarding barrier placement as relative to the curb. A short summary of existing regulations is presented. Numerical simulations using the explicit finite element system Ls-Dyna are shown. In the analysis, variable distance between the barrier and the curb is assumed. The obtained result reveals that the distance has little impact on the working width of the barrier.

PL

Kwestia bezpieczeństwa ruchu drogowego w Polsce w ostatnim czasie stała się przedmiotem wielu programów badawczych. Narodowe Centrum Badań i Rozwoju (NCBiR) wraz z Generalną Dyrekcją Dróg Krajowych i Autostrad (GDDKiA) zainicjowało program badawczy Rozwój Innowacji Drogowych (RID), którego celem jest m.in. kompleksowa analiza systemów powstrzymujących pojazd zainstalowanych na drogach i obiektach inżynierskich. W artykule badano wpływ usytuowania bariery mostowej względem krawężnika na wartość szerokości pracującej, czyli odległości pomiędzy powierzchnią czołową bariery od strony ruchu a maksymalnym bocznym dynamicznym położeniem jakiejkolwiek części bariery.

14

Analiza numeryczna testu balistycznego pocisku kalibru 7.92 × 33

Stopel M., Skibicki D., Ruszkowski J.

Postępy w Inżynierii Mechanicznej

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2016

|

nr 7(4)

57--65

PL

W pracy przedstawiono analizę numeryczną testu balistycznego pocisku kalibru 7,92 × 33 przeprowadzoną na podstawie wytycznych norm opracowanych przez niemieckie towarzystwo VPAM. Test balistyczny polegał na penetracji przez pocisk płyty stalowej, wykonanej ze stali Weldox 700E o grubości 8 mm, w zależności od kąta natarcia. Analiza numeryczna dotyczyła weryfikacji literaturowych danych dotyczących kąta natarcia pocisku i skutecznej penetracji płyty stalowej.

EN

This paper presents some ways of modeling the bullet impact in the LS-Dyna. An attempt was made to verify the literature data the angle of impact of the projectile with the effective penetration of steel plate.

15

Simulations of front impact between two shunting locomotives at different velocities

Szurgott P., Kozioł Ł.

Journal of KONES

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2016

|

Vol. 23, No. 2

381--388

EN

The main aim of this study is to carry out dynamic simulations of a crash between two identical shunting locomotives running at different velocities. Numerical analyses using a Finite Element Method (FEM) include front-end impact of the running locomotive with a stationary one situated on the track. Such collision scenario is required for railway vehicles operated on national and regional networks. A considered locomotive based on a Polish shunting locomotive – SM42, however the tested locomotive was slightly modernized. Finite element model of the locomotive was developed by the authors. FE analyses were conducted according to the PN-EN 15227 standard, which provides crashworthiness requirements for railway vehicle bodies. LS-DYNA computer code was used for the simulations. The paper presents selected results of analyses focused on the locomotive frame behaviour. Simulations were performed for the vehicle between 20 and 90 km/h. An influence of the impact velocity on some output quantities was determined. Contours of effective stress for selected moments of time as well as time histories of selected values are depicted. For modernized locomotives, it is required to evaluate their behaviour during the impact test. Dynamic numerical simulation is acceptable since the experimental tests on the complete objects under consideration are impractical and impossible sometimes.

16

Numerical study of dynamic response of reinforced concrete bridge induced by selected heavy vehicle

Szurgott P., Smolarz M.

Journal of KONES

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2016

|

Vol. 23, No. 4

505--512

EN

The main aim of this study is to carry out dynamic simulations of structural response of reinforced concrete bridge loaded with a moving heavy vehicle. Computational dynamics analysis was conducted using LS-DYNA computer code. The selected bridge was a reinforced-concrete structure located on the U.S. 90 in Northwest Florida. The bridge has six prestressed AASHTO type III beams and concrete deck. An 8-axle vehicle including a tractor unit and a low bed trailer were selected as a representative for the study. FE model of the tractor based on previous studies; however, a FE model of the trailer was developed for the present work. Analyses included passages of a vehicle with 47 tonnes cargo. A cargo resting on a trailer was taken into account by changing the material density of selected components in the semi-trailer FE model. Time histories of the bridge deflections in the middle of the span were recorded during the simulation tests. Simulations were performed for the vehicle velocity between 20 and 50 mph, stepped by 5 mph. An influence of the velocity on the bridge deflection was determined. The main objective of the simulation tests on the selected bridge was to assess the actual dynamic load allowance (DLA), also known as impact factor, based on the maximum deflection of the bridge span as a function of the vehicle velocity.

17

A finite element model development as a part of process of energy absorption material selection

Jakubowski R., Skorupka Z.

Journal of KONES

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2016

|

Vol. 23, No. 3

217--223

EN

The Warsaw Institute of Aviation major role in the RASTAS Spear project was to design an energy absorption system for the space probe lander. As the system was meant to be unmanned, the main requirement was to use no active solutions like parachute or rocket propulsion (less complexity in application and thus more reliability). A group of various materials was chosen to be tested. Tests campaign was divided into three stages: static compression tests, low speed dynamic tests and high speed dynamic tests. The high-speed dynamic tests were divided into two substages. In the first one simple cube specimens were tested to obtain data necessary for second substage in which full-scale object was tested. Having valuable data from experiments, numerical simulations in LS-DYNA software were carried out and then the results were compared. Based on experimental data several iterations during finite element model developing process were made. That process allowed setting up properly simulation by changing and adjusting properties such: material models, contact types, element formulation and other important constants. The finite element simulation results showed a good correlation with experimental data. The knowledge gained from numerical model optimization in connection with experimental data allowed for creating faster and more accurate energy absorbing material selection methodology. This methodology was successfully used in subsequent projects in which Institute of Aviation took part and also can be used in other future applications.

18

Numeryczne badania mat energochłonnych jako element zwiększający bezpieczeństwo załogi pojazdu wojskowego

Sławiński G., Malesa P., Niezgoda T.

Aktualne Problemy Biomechaniki

|

2016

|

z. 11

115--120

PL

W pracy zostały przedstawione wyniki modelowania oraz symulacji numerycznych paneli energochłonnych absorbujących energię pochodzącą od wybuchu. Przedstawiono syntetyczny sposób analizy zagadnienia od opracowania geometrii po przygotowanie modelu numerycznego. Wyniki w postaci sił obciążających charakterystyczne punkty pomiarowe manekina Hybryd III 50th w wersji Fast oraz pozostałe charakterystyki przedstawiono w formie wykresów.

EN

This study presents the results of numerical simulations of an energy absorbing panels as an element increasing the safety of the military vehicle crew. The simulations are made by a finite element method in LS-Dyna. A numerical Hybrid III 50th dummy is used to simulate the tibia axial compressive forces and accelerations. Simulations results are compared with literature data to validate the Hybrid III dummy. Forces and accelerations results are presented in the form of a charts.

19

Comparative study of potential whiplash injuries for different occupant seated positionsm during rear end accidents.

Omerovic S., Tomasch E., Gutsche A. J., Prebil I.

Acta of Bioengineering and Biomechanics

|

2016

|

Vol. 18, no. 4

145--158

EN

Purpose: Whiplash injuries to the cervical spine represent a considerable economic burden on society with medical conditions, in some cases persisting for more than a year. Numerous studies of whiplash injuries have been made for occupant normal seated position, leaving the analysis of neck injuries for out-of-normal positions not well documented. For that purpose, a detailed human cervical spine finite element model was developed. Methods:The analysis was made for four most common occupant seated positions, such as: Normal Position with the torso against the seat back and the head looking straight ahead, Torso Lean forward position with the torso away from the seat back for approximately 10°, Head Flexed position with the head flexed forward approximately 20° from the normal position and HeadFlexed with Torso Lean forward position with the head flexed forward approximately 20° and torso 10° from the normal position. Results: The comparative study included the analysis of capsular ligament deformation and the level of S-curvature of the cervical spine. The developed model predicted that Head Flexed seated position and Head-Flexed with Torso Lean forward seated position are most threatening for upper and lower cervical spine capsular ligament respectively. As for the level of S-curvature, the model predicted that Head-Flexed with Torso Lean forward seated position would be most prone to neck injuries associated with it. Conclusions:This study demonstrated that the occupant seated position has a significant influence on potential whiplash injuries.

20

Symulacja numeryczna skutków wybuchu w obrębie zasobnika energii lokomotywy hybrydowej

Barnat W., Ciepielewski R., Szurgott P.

Przegląd Mechaniczny

|

2015

|

nr 11

23--27

PL

Celem pracy badawczej jest oszacowanie skutków eksplozji mieszanki palnej powstałej w zasobniku lokomotywy na skutek gwałtownego rozładowania lub przeładowania akumulatorów. Prewencyjne środki zapobiegania eksplozji produktów elektrolizy wewnątrz baterii określa norma PN-EN 50272-3-2007P, która stawia wymogi dotyczące cyrkulacji powietrza. Analiza dotyczy przypadków, kiedy systemy te nie są wystarczające.

EN

The aim of current study is to assess the effects of explosion of combustible mixture formed in the locomotive storage energy module due to the rapid discharge or recharge of batteries. Preventive measures to avoid the explosion of electrolysis products inside the battery are specified in PN-EN 50272-3-2007P standard that identifies the requirements for air circulation systems. Conducted analysis is dedicated for cases in which such systems are not sufficient. FE element analyses were carried out using LS-DYNA computer code. Contour bands of effective stress and total displacements are presented as results of analysis.