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In Brazil there is a significant number of medium and high voltage power cables falling on vehicles causing catastrophic accidents leading to serious injuries and deceases. It is advised that the car works as a shield so passengers inside the vehicle should not open doors and windows, but to the knowledge of the authors no work has presented a quantified study showing details like electromagnetic field intensity and 3D plots to really illustrate this situation. This work uses numerical simulation to replicate a scenario of a high power cable in direct contact with a vehicle and numerous positions of human body models inside and outside of the vehicle. Electromagnetic field is calculated showing the shielding effectiveness of the vehicle chassis. Also, current density are calculated to show the path of the current including the human body models. Safety guidelines are presented based on electromagnetic field strength and several scenarios are simulated and quantified.

We have seen recently in Brazil a significant number of medium and high voltage power cables falling on vehicles causing catastrophic accidents leading to serious injuries and deceases. It is advised that the car works as a shield so passengers inside the vehicle should not open doors and windows, but to the knowledge of the authors no work has presented a quantified study showing details like electromagnetic field intensity and 3D plots to really illustrate this situation. This work uses numerical simulation to replicate a scenario of a high power cable in direct contact with a vehicle and numerous positions of human body models inside and outside of the vehicle. Electromagnetic field is calculated showing the shielding effectiveness of the vehicle chassis. Also, current density are calculated to show the path of the current including the human body models. Safety guidelines are presented based on electromagnetic field strength and several scenarios are simulated and quantified.

The effects of specific parts inside the vehicle body in a radiated immunity numerical simulation is addressed. The benefits of numerical simulations for electromagnetic compatibility analysis is well known and reported in the literature, nevertheless, the accuracy of the results depends on the mathematical models that is being considered. Numerous simulations were performed, detailing how specific parts of a vehicle can affect the electric field inside a vehicle. The commercial package ANSYS HFSS™ was used due to the extremely fast and accurate simulations since it uses the finite element method technique, which includes hybridizations with the method of moments. This allows full simulations to be performed in a few minutes with controlled convergence, allowing a more extensive investigation. Simulation results are compared with experimental data obtained from experiments performed at Instituto Nacional de Pesquisas Espaciais showing a good agreement.

The optimization of internal components in a shock absorber is today a task that demands a significant experimental support and a great number of prototypes and tests. Aiming to reduce the development time, a CFD (Computational Fluid Dynamics) model can be used in order to predict and study the flow through several valves and internal components in a shock absorber. The present work approaches the first development stage of a complete CFD shock absorber model. This stage consists of the flow simulation through an existing clearance between the shock absorber piston and the tube, studying the effects and its relations with the resultant forces. The results of the simulations have been compared with analytical calculations and experimental tests in order to validate the model.