Development Of Rear Impact Pulse Generator And Protection Studies Of Rear Impact Neck Injury

With the living conditions of people have been improved accordingly, and the demand for vehicles is also increasing. By 2015, the number of civilian vehicles reached One hundred and seventy-two million two hundred and eighty thousand. Though cars bring convenience to people, the rising of car ownership also led to increase the number of traffic accidents, which brings people's physical health and property into a very serious threat. Cervical whiplash injury is a frequently seen injury in traffic accidents, especially in rear-end impact. Whiplash injury not only brings losses to health and property, but also brings threats to have sequelae. Therefore, the research of Rear-end Collision of the Vehicle and neck injury research has become one of the most popular subjects in present society.A full seamless investigation and analysis on current situation and development trend of rear-end impact have been done. Based on that, combining with the existing laboratory conditions, the sled test system in rear-end impact system was designed. What's more, based on analysis the actual occurrence of cervical whiplash injury, evaluation standard of the injury was determined, and a new stretcher model used for carrying cervical injury patients was built. And experiment and computer simulation identify its correctness and practicability. The main contents of this paper are as follows:(1) By analyzing and generalizing the relevant domestic and international literature, the current research status of sled test system and cervical whiplash injury were summarized. Then this paper describes the basic models of vehicle impact accident reconstruction, type of sled crash test, the actual occurrence of cervical whiplash injury. After that, the influencing factors on the sled test system in rear-end impact system are analyzed.(2) we applied the finite element software ANSYS/LS-DYNA to analyze the sled test in rear-end impact system which has been designed, and the deceleration curve meets the ECE R44 regulation which make demands on deceleration in sled test system. Moreover, the computer simulation proves what the effects on the sled test in rear end impact system.(3) To verify the simulation result, sled tests are done by auto crash test system in traffic safety laboratory. And the whole sled test process and the actual occurrence of cervical whiplash injury were recorded.(4) According to the conclusion obtained, a new stretcher model used for carrying cervical injury patients was built. And experiment and theoretical analysis identify its correctness and practicability.The automobile crash energy absorbing device model built in this paper can improve motor vehicle collision resistance performance, and the result of computer simulation and experiment identify its correctness and practicability. It is convenient to study real car collision the actual occurrence of cervical whiplash injury by sled crash test. The application research of the sled test in rear-end impact system and carrying cervical injury analysis in dynamic monitoring data processing is conducive to the traffic safety study. Thus it provides to be an important part in engineering and medicine with wide applications.