Mathematical model of evacuation speed for personnel in buildings

The dynamical equation of evacuation speed for personnel has been found from the principle that the acceleration is subjected to the crowd degree both the back_front and the two_side. The speed equation has also been derived when people egress from buildings. The relationship between the crowd density and the speed presented logarithmically. It is good agree with the experimental data. The study also presents that the influence of the two_side is inferior to the front and back.