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Research on Vehicle Bonnet Improvement Based on the Pedestrian-Protection

Author: ChenBo
Tutor: WangHui
School: Harbin Engineering University
Course: Mechanical Manufacturing and Automation
Keywords: Car hood Pedestrian protection Crash simulation Parameter optimization
CLC: U463.833
Type: Master's thesis
Year: 2010
Downloads: 136
Quote: 1
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Abstract


With the increasing number of cars in China , the number of people and vehicles collisions also increased significantly. Pedestrians due to the lack of the necessary protective measures in a road accident vulnerable to injury. Pedestrian thigh injury in the form of a variety of injuries , account for a large proportion . A large number of studies have shown that the car hood is one of the main components for pedestrian thigh injury . Therefore, to improve pedestrian protection performance of the automobile hood , for reducing pedestrian leg injury has important significance. The main research contents include: First of all , according to EEVC subsystem trial requirements , the establishment of the finite element model of the for pedestrian thigh impact and car hood , and in accordance with the relevant requirements of the EU-pedestrian protection regulations , pedestrian thigh impactor model was validated the test results show that the mechanical response of the model to comply with regulatory requirements , and can be used for subsequent simulation . Application software optimization HyperStudy analysis module , the car hood inner panel thickness , the thickness of the outer plate , the tilt angle , collision position and material parameters were optimized , the influence of various parameters on the pedestrian thigh injury . Again , select engine cover plate thickness , the thickness of the outer plate , tilt angle , and material yield strength as the research object , and these parameters are grouped experimental full factorial experimental design method . Poor analysis of the experimental results obtained main effects of various parameters on the impact of the pedestrian thigh injury , as well as the interactions between parameters . Finally , based on polynomial response surface methodology , the moving least squares method and the Kriging method to establish the approximate mathematical model of pedestrian and vehicular collision . Fitting precision of the analysis of the three models , and the highest accuracy Kriging model optimization calculation . Before and after optimization results were compared and analyzed , the results show that the optimized the car hood pedestrian protection performance has been greatly improved .

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CLC: > Transportation > Road transport > Automotive Engineering > Automotive structural components > Cab and body > Cab and body parts and components > Hood and tank curtain
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