Abstract:

In order to explore the response of vehicle cab bottom under the non-contact blast wave of improvised explosive device, mine, etc. smoothed particle hydrodynamics (SPH) algorithm is employed. The energy, stress contours and destruction form of a square plate restricted by four sides under blast wave with SPH algorithm are analyzed, and the results is highly comparable with empirical formula and the classical method arbitrary Lagrangian-Eulerian (ALE), the SPH algorithm is available for the transient dynamic response analysis of structure under blast wave. The SPH algorithm is employed to analyze the response of vehicle bottom under explosive blast wave, and the response of fuel tank, battery support, cabin floor and chassis, etc. are validated with physical test. A conclusion can be made that SPH needs simpler model and lower cost, and the result is more accurate. So SPH can be used to predict the vehicle cab bottom shell structure’s response under the blast wave, and provide a reference to the anti-explosion design of vehicle bottom structure.

Key words: cab bottom structures, explosive blast wave, smoothed particle hydrodynamics, structural response, vehicle