SIMULATION OF EXPLOSIONS IN TRAIN AND BRIDGE APPLICATIONS

ABSTRACT
The application of practical engineering, propagation processes of shock waves is simulated using the LS-DYNA software. Explosion is carried out on the surface and underground. The analysis results interpreted to assess the damage to the intended target such as coach on the track over a bridge. The results are also extended to study the collateral damage to a bridge or to a nearby building. Material Pseudo Tensor and Linear Plasticity in LS-DYNA have been used for the simulation. Explosives were initiated at ground level, bottom of the bridge, between centers of the two abutments. The effects of the locations were studied to extent of damage to the bridge and to the coach on the track. The conclusions have also indicated that bridge after the blast encountered with some major cracks, and can be made blast resistant bridge structure by providing additional dampers and springs, suitable structural modifications to the bridge structure, rails, its anchorage structure on either side and also the abutments.