EXPERIMENTAL INVESTIGATION ON COHERENCY FACTOR OF CROWD JUMPING LOAD AND ITS APPLICATION

This paper investigates the coherency factor of individuals in a jumping crowd. The experiments of single person's jumping load at four sound-guided frequencies were conducted, in which seventy three test subjects participated. The time lag between the metronome's time and the test subject's landing time was used as the coherency factor of rhythmic crowd jumping. The statistical analysis of experimental data shows that probability distribution characteristics of coherency factor can be described as the combination of a uniform distribution and a Beta distribution, which are corresponding respectively to individual random jumping and coherent jumping in crowd. The parameters of the probability density function were determined by experimental results. Simulation of crowd jumping load was carried out by combining the coherency factor model with the single random jumping load model.