Study on the pressure distribution of fall arrest belts in the static suspension and falling process

The fall arrest belt as a piece of personal protective equipment is one of the primary methods of protection against falls. This paper uses pressure-sensitive paper to test the pressure distribution of six parts at different hanging points in static suspension and dynamic fall. The ordinary seat belt is improved by developing a wide–narrow changing belt, which promotes uniform pressure distribution. The results show that the front hanging point is better than the back hanging point, as it can minimize the pressure of the seat belt on the human body during static suspension. Using a wide–narrow changing belt to increase the contact area of the heavily compressed parts can significantly reduce the pressure and promote uniform pressure distribution. The variable coefficient of pressure distribution p of ordinary seat belts and wide–narrow changing seat belts decreased from 0.68 to 0.28. The force discrepancy in different parts fell from 143.7 to 34.8 N.