Research On Head Injury Of Standing Electric Scooters Riders In Various Accident Scenarios

In recent years,the standing electric scooters has been favored by consumers,but the traffic accidents caused by its more and more extensive use have also attracted the attention of scholars.Previous studies mainly analyzed the injury situation of standing electric scooter riders by collecting the outpatient data of hospitals.In order to more comprehensively analyze the injuries of cyclists in various accident scenes,this paper uses computer simulation technology to study the injuries of cyclists in various accident scenes.Previous studies have shown that the head injury of standing electric scooter riders in traffic accidents is the most common and the most serious consequence,so this paper focuses on the head injury research of standing electric scooter riders in traffic accidents.Standing electric scooters mainly include standing electric scooters and standing electric balance scooters.Through a large number of literature reading and accident video analysis,this paper summarizes the common accident scenes of standing electric scooters in different use occasions,mainly including electric scooters colliding with stationary objects on the road and cars,and electric balance scooter colliding with stationary objects or suddenly changing driving state and causing self-falling,totally four typical working conditions.Among them,the collision with the stationary object includes the scene of hitting the traffic sign pole,hitting the curb and rolling the deceleration belt;Collision with the car includes the scene that the front of the electric scooter collides with the side of the car and the front of the car collides with the side of the electric scooter;Sudden change of driving direction includes sharp acceleration,sharp deceleration and sharp turn scenes.At the same time,this paper also explores the collision boundary conditions,including driving speed,collision angle and collision position,and constructs more abundant collision scenes,thus making the research data more objective.In this paper,the rider’s head/brain injury is calculated and output by using the coupled human computational biomechanics model established and verified by our team in the early stage.By coupling two existing typical commercial pedestrian models,this model not only ensures the authenticity and reliability of human head injury in the simulation,but also greatly reduces the calculation cost.Then,the validity of the standing electric scooter model established in this paper is verified by a real collision accident between an electric scooter and a car.In order to avoid the research limitation caused by using a single head injury evaluation index,this paper extracts the linear acceleration,rotational acceleration,angular velocity and brain tissue response of the center of gravity of the head,calculates the calculation parameters based on various head injury criteria(HIC₁₅,HIP,Br IC,MPS_0.98,CSDM_0.25)in each scene,and makes a comprehensive study on the risk of the rider’s head/brain injury in typical collision conditions of standing electric scooters,and finally draws the following conclusions:Generally speaking,the head injury of the standing electric scooter rider is slightly greater than that of the sitting rider.When a standing electric scooter collides with a stationary object,the severity of the rider’s head injury is closely related to the collision scene,the rider’s landing posture and riding speed,and the severity of the head injury caused by different landing postures is obviously different.When the front of the electric scooter collides with the side of the car,the severity of the rider’s head injury is relatively low.When the car hits the side of the electric scooter head-on,the speed of the car has a significant linear correlation with the head injury of the rider of the electric scooter,and it is easy to cause serious head injury to the rider.To sum up,the head injury of the rider of standing electric scooter in traffic accidents can’t be ignored.This study suggests that the rider of standing electric scooter should wear safety helmet when riding,and the research results can also provide data support for the formulation of relevant laws and regulations.