CAE Simulation Based Methodology for Airbag Compliant Vehicle Front Protection System Development

Thota, Narasimha M.; Epaarachchi, Jayantha; Lau, Kin-tak

doi:10.4273/ijvss.5.3-4.04

Cited by 3 publications

(1 citation statement)

References 5 publications

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“…The authors have obtained good agreement of the simulation results with the experiment conducted. Another paper [12] reports on using LS-Dyna program to model the vehicle front protection system (VFPS) to decrease the vehicle damage for collisions with animals. The authors have presented threshold parameters of gas airbag system activation during the impact of vehicles equipped with this system.…”

Section: Introductionmentioning

confidence: 99%

Collision Model Simplifications in the Dynamic Analysis With the SDC Method

Aleksandrowicz

2020

Transport Problems

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The number of motor vehicles in the European Union (EU) is constantly increasing, which is causing an increase in the traffic volume. This, in turn, boosts the economic development of the EU member states. However, an increase in traffic volume leads to road collisions and accidents, which lead to high repair costs. Some accident victims report fake vehicle damage to extort money for repairs. There are criminal groups that stage accidents for this purpose; thus, these claims are very difficult to verify. Thus, it is not enough to verify the sustained damage only by comparing the geometric parameters of the impact traces. New, modern research methods with simulation programs need to be used in order to reconstruct the course of an accident. The SDC (Static Dynamic Characteristic method) provides the possibility of vehicle damage verification, according to this convention. However, simplified modelling with the use of simulation programs involves the necessity of identification of input parameters in order to reconstruct a collision and the vehicle's post-collision movement. If the input parameters are not correct, the simulation results will also be incorrect, which will have a direct impact on the parties involved in potential legal proceedings, both civil and criminal. This study deals with the identification of the impact parameters and sensitivity of the simulation results to input data. Impact verification with the SDC method shows both a knowledge enhancement and a practical value. They can be used by experts, expert witnesses, computer programmers, researchers and students.

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Section: Introductionmentioning

confidence: 99%

Collision Model Simplifications in the Dynamic Analysis With the SDC Method

Aleksandrowicz

2020

Transport Problems

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Identification parameters for accident reconstruction software at frontal car impact

2020

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The study presents an analysis of the frontal impact of a Dodge Grand Caravan car colliding with different obstacles - a rigid barrier, for full and 50 % overlaps, and a pole with 0.5 m. diameter. Simulations were performed using a V-Sim 4 program at three data sets: default data offered by the program, data established by experts on the basis of their experience and identified on the basis of impact simulation via a LS-Dyna program. The results obtained showed that the attainment of a precise simulation is possible only when the data of V-Sim program is formulated in accordance with an advanced MES analysis. This usually pertains to cases when there is no full overlap of the vehicle body in connection with the obstacle. The results of this work may offer some directions for the development of this type of simulation program. They also show users how important it is to provide accurate input data to achieve reliable calculation results.

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Modeling Head-On Collisions: The Problem of Identifying Collision Parameters

Aleksandrowicz

2020

Applied Sciences

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The analyses performed by the experts are crucial for the settlement of court disputes, and they have legal consequences for the parties to legal proceedings. The reliability of the simulation result is crucial. First, in article, an impact simulation was performed with the use of the program default data. Next, the impact parameters were identified from a crash test, and a simulation was presented. Due to the difficulties in obtaining the data identified, the experts usually take advantage of simplifications using only default data provided by the simulation program. This article includes the original conclusions on specific reasons of simplified collision modeling in Multi Body Systems (MBS) programs and provides specific directions of development of the V-SIM4 program used in the study to enhance the models applied. This manuscript indicates a direction for crash model development in MBS programs to consider a varied 3D body space zones stiffness related to the structure of the car body and the internal car elements instead of modeling the car body as a solid with an average stiffness. Such an approach would provide an alternative to Finite Element Method (FEM) convention modeling.

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CAE Simulation Based Methodology for Airbag Compliant Vehicle Front Protection System Development

Cited by 3 publications

References 5 publications

Collision Model Simplifications in the Dynamic Analysis With the SDC Method

Collision Model Simplifications in the Dynamic Analysis With the SDC Method

Identification parameters for accident reconstruction software at frontal car impact

Modeling Head-On Collisions: The Problem of Identifying Collision Parameters

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