Technical requirements for truck protection

skills requirement
With reference to the relevant content of ECE R58, our country has formulated the GB11567.2-2001 standard to put forward technical requirements for the rear lower protection devices of cars and trailers, and clearly stipulates the test conditions for rear-end collisions with moving barriers. The purpose is to test the rear lower protection devices of trucks. The blocking and buffering energy-absorbing functions of the lower protective device are evaluated to minimize the injuries to the occupants of the rear-end vehicle in the event of a rear-end collision. In the literature [1], a rotary rear lower protection device is designed. This device uses a rotating axis to achieve good passability for trucks. It uses damping spring elements to absorb energy and establishes an analytical model to design an energy-absorbing rear lower protection device. device, this rear protective device is filled with fiberglass material so that it is extruded and deformed in the event of a collision to achieve an energy-absorbing effect. Literature [4] analyzed the impact of the ground height and stiffness of the front and rear protective devices on the penetration collision protection effect and pointed out The front and rear protective devices should absorb as much collision energy as possible while ensuring the function of preventing entry collision, so as to reduce the damage to the car in the collision. According to the relevant provisions of the GB11567.2-2001 standard, the LS-DYNA software was used to conduct regulatory verification and performance analysis of the rear protective device of a truck. According to the fact that the original rear protective device does not have blocking and buffering energy-absorbing functions, Disadvantages, a new expansion tube rear protection device is designed. Simulation analysis of the improved protective device shows that the expansion tube is stable during the expansion and deformation stage, and the energy absorption has linear superposition characteristics and is easy to control. The improved rear protective device meets relevant regulatory requirements, and its blocking and energy-absorbing functions are also significantly improved.