Abstract: To solve the problems of computational complexity of the explosion simulation models in military and railway accident fields, this paper proposed an improved simulation model which is based on the particle system and replaced fluid model by the qualitative and quantitative random changing model. Our simulation model was established by the combination of particle emission speed parameters and random perturbations speed parameters, and it can reduce the computational complexity of the explosion simulation effectively by giving different parameters and forming specific simulation models for smoke,fire and debris. Experiment shows that this method has good operation speed and perfect simulation effect, and can meet the needs of various explosive simulation effect.

Key words: Visual simulation, Particle system, Explosion effects, Simulation model