Well controlled model experiments were carried out to verify acoustic impedance inversion scheme, and different methods of extracting impulse responses were investigated by practical data. The acoustic impedance profi...Well controlled model experiments were carried out to verify acoustic impedance inversion scheme, and different methods of extracting impulse responses were investigated by practical data. The acoustic impedance profiles reconstructed from impulse responses are in good agreement with the measured value and theoretical value.展开更多
Global effects caused by the detonation of an IED near a military vehicle induce subsequent severe acceleration effects on the vehicle occupants.Two concepts to minimize these global effects were developed,with the he...Global effects caused by the detonation of an IED near a military vehicle induce subsequent severe acceleration effects on the vehicle occupants.Two concepts to minimize these global effects were developed,with the help of a combined method based on a scaled experimental technology and numerical simulations.The first concept consists in the optimization of the vehicle shape to reduce the momentum transfer and thus the occupant loading.Three scaled V-shaped vehicles with different ground clearances were built and compared to a reference vehicle equipped with a flat floor.The second concept,called dynamic impulse compensation(DIC),is based on a momentum compensation technique.The principal possibility of this concept was demonstrated on a scaled vehicle.In addition,the numerical simulations have been performed with generic full size vehicles including dummy models,proving the capability of the DIC technology to reduce the occupant loading.展开更多
文摘Well controlled model experiments were carried out to verify acoustic impedance inversion scheme, and different methods of extracting impulse responses were investigated by practical data. The acoustic impedance profiles reconstructed from impulse responses are in good agreement with the measured value and theoretical value.
基金Herr TRDir K.Husing from the German test range WTD-91 GF-440 in MeppenHerr TRDir K.Neugebauer from BAAINBw
文摘Global effects caused by the detonation of an IED near a military vehicle induce subsequent severe acceleration effects on the vehicle occupants.Two concepts to minimize these global effects were developed,with the help of a combined method based on a scaled experimental technology and numerical simulations.The first concept consists in the optimization of the vehicle shape to reduce the momentum transfer and thus the occupant loading.Three scaled V-shaped vehicles with different ground clearances were built and compared to a reference vehicle equipped with a flat floor.The second concept,called dynamic impulse compensation(DIC),is based on a momentum compensation technique.The principal possibility of this concept was demonstrated on a scaled vehicle.In addition,the numerical simulations have been performed with generic full size vehicles including dummy models,proving the capability of the DIC technology to reduce the occupant loading.
