When designing anti-collision pads, the following factors should be considered:
(1) Due to the exposure of anti-collision pads to the external environment, their materials must meet the requirements of high and low temperature resistance, corrosion resistance, etc.
(2) The collision pad should be designed so that no debris flies out during the collision. After the frontal and side collision tests, the debris generated by the collision pad should be retained in the collision pad and should not cause harm to the colliding vehicle, surrounding pedestrians, and other vehicles.
(3) After the vehicle collides with the anti-collision pad, the driver's acceleration should be less than 12g, and the average acceleration in the last 10ms should be less than 20g. Moreover, after the vehicle loses control and collides with the anti-collision pad, the vehicle cannot cross it; It is also not allowed to rebound and enter adjacent driving lanes to avoid collision with oncoming vehicles and secondary accidents.
(4) The height of the collision pad is not easily too high or too low; Being too high can easily block the driver's line of sight; Too short, the vehicle is prone to climbing onto the crash pad. The principle of conservation of momentum is used in the design of collision pads. For economic considerations, after the collision between the out of control vehicle and the collision pad ends, the vehicle generally does not stop. Therefore, a certain safety buffer distance, usually around 60cm, should be set between the collision pad and the protected obstacle. The principle of conservation of momentum type anti-collision pads, when using a combination of anti-collision tubes, can determine the required number of tubes through trial and error. Due to the complexity of the collision process, experimental or empirical values and deployment sequence are generally used, and no less than 5 anti-collision tubes are generally used for combination.
