关键词: 塑料发盖；行人保护；头部；加速度曲线

Abstract: In vehicle collision accidents, pedestrians belong to the vulnerable group, usually suffer great injuries in the accident, among which the head injury is the most serious. In the development trend of new energy vehicles, the frequency of the use of plastic hood is increasing, but there are few studies on the impact of plastic hood on pedestrian head injury protection. Based on the head protection regulations of ECE R127 for pedestrian protection, this paper divides the location areas of the hair cover with different damage values for an existing A00 plastic hair cover. Combined with the test and simulation data, the overall acceleration curve of the hair cover is obtained, and the acceleration curve of the plastic hood is summarized and compared with that of the steel hood. Plastic hood require more energy-absorbing space than steel hair hood. At the same time, the typical acceleration curve of head collision of plastic hair cap is obtained by comparing the acceleration of different areas. By studying the acceleration curve of the head impact of the plastic hood, this paper provides a reference for the subsequent development of the head protection of the plastic hood cover vehicle, which can put forward more accurate layout parameters and modeling requirements for the general layout and modeling in the pre-research stage of the vehicle development, and reduce the repetitive work for the vehicle development.

Key words: Plastic hood; Pedestrian protection; Head; Acceleration curve