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Research and Application of Motor-bus Collision Accident Reconstruction Oriented To Occupant Injury

Author: XuJiong
Tutor: JinXianLong
School: Shanghai Jiaotong University
Course: Mechanical Design and Theory
Keywords: Accident Reconstruction Motor coach Occupant injury Trajectory Optimization More rigid body Model
CLC: U492.8
Type: Master's thesis
Year: 2010
Downloads: 100
Quote: 1
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Abstract


As China's industrialization and urbanization to enter the stage of rapid development, \Bus as an important carrier of one of the public transport system, its accident safety research is being more and more attention of scholars. Based on computer simulation of bus collision accident reconstruction with high accuracy, objectivity strong and comprehensive analysis, etc., it is possible to provide a scientific basis for the identification of the accident, the accident prevention and occupant injury mechanism research, which has important social significance and practical value. Bus collision accident involved two main processes were studied for Research and the actual needs of that the external vehicle collision process and in-vehicle secondary collision course. Parameters as vehicle collision sports simulation to reproduce the link between these two processes, to conduct a comprehensive analysis of bus collision accident. For the external vehicle collision course record according to the scene of the accident information collection, build vehicles and the environment based on the optimal trajectory momentum / impulse method, and energy / deformation method for braking the blot, road scattered objects outside the vehicle deformation coupling collision simulation system model, site location information from the vehicle after the collision thrust reversers collision course, and thus anti-push vehicle collision state of motion. Through deformation degree of proximity between the simulation results and the actual deformation of the degree of fit between the vehicle simulation trajectory with traces of actual road and a vehicle, and continuously adjust the input parameters of the crash simulation system model and simulation obtained with the actual situation is most close to the outside of the vehicle crash simulation process. For the car secondary collision process is mainly based on the investigation of the scene of the accident investigation transcripts and forensic results, for the crew riding position, human traces and interior structural deformation information using external vehicle collision motion parameters, the use of multi-body dynamics method carried the simulation reproduce, then analyze the reasons for the formation of human injury and the crew of the degree of hurt. Taking into account the coupling of the internal structure of the occupant vehicles, and related structural components occurs deformation characteristics coupled multi-rigid body and finite element modeling method, were established with a the hybrid dummy model of the hand grip and the car structure fine model, and the establishment of the interior of the vehicle structure and occupant coupled the collision simulation system model by contact defined spatial position adjustment and the hinge constraint set way. Vehicle occupant injury is more complicated reasons, through a series of simulation analysis of a variety of factors that change the simulation results on the human body injury, three standard collision conditions inside the vehicle occupant collision sports and injury characteristics provide reference and guidance for the practical application of the real accident cases. Finally, the results of this research is applied to the actual case accident reconstruction. 3 from the real bus collision accident simulation study, combined with the practical application details the methods and processes of such accident reconstruction, accident investigation data and verify the feasibility and practicality of the numerical modeling and simulation method.

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CLC: > Transportation > Road transport > Technical management of traffic engineering and road transport > Operation Technology > Road transport safety technology
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