抄録
First we practiced experiments of measurements of propagating velocities and duration for impulsive force with equipments, LOAD-CELL, and various tissues of pigs. Thus, through our experiments, we could estimate the duration time of the impulse acting on our parts of head, which was about 0.001s, and the traveling velocity was about 20m/s. Those values of musicales' tissues have duration time 0.007s, and traveling velocity was 2.8m/s. Responses of our body were different from each part, for examples head, chest, and inferior limb. We though those results reflected the structures of our parts of bodies. We searched initial condition for numerical simulation with hypothecating the falling of man, his height 163cm, weight 60.3kg, and female, 157cm, and 45.3kg. And if a contacting area of head colliding with floor was 1cm , our impulses added to our head reached at 4000-5OOOkgw, and those pressures estimated about 400-500MPa. Since it was said that a common bone has breakdown point whose value is about 280MPa, we recommend wearing some protectors and developing safety-goods in preparation for colliding with any persons on road and for fallings.
