Design Optimization Method about the Spring Stiffness Used in Active Engine Hood of Pedestrian Protection-Reference-Cited by-同舟云学术

Design Optimization Method about the Spring Stiffness Used in Active Engine Hood of Pedestrian Protection

Published:2011-10-24 Issue: Volume:110-116 Page:4876-4882
ISSN:1662-7482
Container-title:Applied Mechanics and Materials
language:
Short-container-title:AMM

Author:

Ye Hui¹,Zhu Min²,Hu Ping³

Affiliation:

1. Jilin University

2. National University of Defense Technology

3. Dalian University of Technology

Abstract

Among the car accident casualties, Pedestrian occupied a large proportion of the injuries. Pedestrian protection became a key problem of vehicle safety. The engine hood was the most possible zone impacted by the head of pedestrian. The pedestrian protection of engine hood was an important performance of vehicle. The active engine hood was used to improve the pedestrian protection performance of vehicle and to meet the regulations. In the lifting system of active engine hood, springs were used to improve the pedestrian protection performance. A design optimization method about the spring stiffness used in active engine hood was developed in this research. The spring stiffness of K was set as design variable, and its interval was set 1~50 N/mm. The impacting zones of engine hood where HIC values of original engine hood were higher than the mean values of corresponding child and adult zones were selected as the cases of optimization. The objective was to minimize the sum of HIC values of those selected zones. The first type of constraints was that the HIC values of child zones were less than the mean HIC value of child zones. The second type of constraints was that the HIC values of adult zones were less than the mean HIC value of adult zones. The spring stiffness optimization model about active hood based on pedestrian protection was constructed and solved. The results of optimization indicated that the obtained spring stiffness by this method improved the pedestrian protection performance of engine hood.

Publisher

Trans Tech Publications, Ltd.

Link

https://www.scientific.net/AMM.110-116.4876.pdf

Reference12 articles.

1. C.E. Neal-Sturgess, E. Carter, R. Hardy, R. Cuerden, L. Guerra, J. Yang, APROSYS European in-depth pedestrian database, Innovations for Safety: Opportunities and Challenges, (2007).

2. I. Kalliske, F. Friesen, Improvements to pedestrian protection as exemplified on a standard-sized car, 17th International Technical Conference on the Enhanced Safety of Vehicles (ESV), Paper No. 283, (2001).

3. J. Hoffmann, A. Kretzschmar and M.V. Blundell, Investigation into the use of adaptable car structures concepts for pedestrian impact protection, International Conference on Vehicle Safety, (2002).

4. H. Ye, P. Hu and S. Lu, Design and Analysis of Active Hood Lift System Used for Pedestrian Head Protecting, 2011 International Conference on Mechanical, Industrial, and Manufacturing Engineering, 15-16 January, Australia, Melbourne, (2011).

5. H. Ye, p. Hu, C. Che, et al., Multidisciplinary optimization method about the thickness of engine hood based on pedestrian protection, First International Conference on Mechanical Engineering, April 3-4, Phuket, Thailand, 2011. (unpublished).