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Safety Design and Optimization of the Vehicle Side Impact

Author: WangXiang
Tutor: ZhangWeiGang
School: Hunan University
Course: Vehicle Engineering
Keywords: Side impact B pillar Tailored welded blank Intrusion velocity Intrusion measurement Side airbag Optimization design
CLC: U467.14
Type: Master's thesis
Year: 2009
Downloads: 498
Quote: 11
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Abstract


With the increasing of the number of the vehicle possession and the rapid development of high-grade highway, Road traffic accidents are increasing year by year. Every year, casualties and loss of property traffic caused traffic accidents become more and more serious. In a variety of collision accident, side impact account for about 36 percent of the total number of accidents, and injury rates and the proportion of mortality is quite high. For the Side Impact, as a result of weak side stiffness for vehicle, with small energy absorption space, once the side impacted by the outside big intruding energy, it will enable the passengers to face a greater risk of injury. China began to publish and implement the "motor vehicle occupant protection in side impact" standard in July 1st 2006, at the same time, Introduced china’s new car assessment program. Therefore, researching automotive side Impact occupant protection in China is of great significance.First, the paper outlines the Europe and the United States side impact regulations and methods, established the mobile deformable barrier and verified the finite element model. To a hybrid car as the research object, the finite element simulation model of the vehicle side impact had been built. According to the country side impact regulation,the vehicle model was impacted by MDB model. The result of contrasting the simulation and the real car test data indicates the accuracy of the simulation model and validated the virtual test simulation method.Using a simplified B pillar/dummy model analysis the impact deformation patterns and the different speed of B pillar on passengers injury. Its conclusion indicated reasonable deformation mode of B pillar and intrusion velocity can effectively improve the dummy damage for side impact. According to this conclusion, thin article using welding process link different materials or different parts of the thickness, by changing the B pillar up and the lower part the strength in vehicle and reach a reasonable deformation patterns and intrusion velocity, intrusion measurement, So as to improve the performance of a side impact. Side impact airbag model was established by using the PSM sub-structure method, the side airbag parameters optimization was conducted by using experimental design and response surface methods. After optimization, the integrated assessment of the value of harm WIC lower than the initial value of 14.64%, so that the role of the side airbag performance has been markedly improved. In this paper, an approach for the study, the conclusions and improvement measures for side impact performance can provide reference about carrying out automotive side impact crashworthiness performance of automotive design.

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CLC: > Transportation > Road transport > Automotive Engineering > Vehicle test > Vehicle test > Safety, collision and destruction test
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