|
|
Crashworthiness optimization design of automobile B-pillar structure based on negative Poisson′s ratio structure |
College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu 210016, China |
|
|
Abstract To improve the side crashworthiness of automobile, based on the traditional B-pillar basic structure, a new B-pillar structure with negative Poisson′s ratio inner core was proposed. According to the requirements of C-NCAP, the side impact model was established based on the new B-pillar structure. Taking sample points by the optimal Latin hypercube test design method, the response surface model between each evaluation index and design variable of B-pillar was established. On this basis, the invasion displacement and the invasion speed of B-pillar were used as optimization objective, and the NSGA-Ⅱ optimization algorithm was adopted to improve the new B-pillar structure by the multi-objective optimization design. The results show that the new B-pillar structure can reduce the invasion displacement by 7.44% with decreased invasion speed by 5.10%, which illuminates that the side crashworthiness of vehicle is significantly improved.
|
Received: 27 September 2019
|
|
|
|
[1] |
张立宇. 某车侧面碰撞中B柱的耐撞性研究与优化[D]. 锦州: 辽宁工业大学, 2016: 24-28.
|
[2] |
饶紫微,乔维高,杨松,等.某车型外流场特性的数值仿真研究[J].武汉理工大学学报(交通科学与工程版),2014,38(2):450-453.
|
|
RAO Z W, QIAO W G, YANG S, et al. Numerical simulation of the external airflow around a car[J]. Journal of Wuhan University of Technology (Transportation Science and Engineering), 2014,38 (2): 450-453. (in Chinese)
|
[3] |
IKPE A E, OWUNNA I B, SATOPE P. Design optimization of a B-pillar for crashworthiness of vehicle side impact [J]. Journal of Mechanical Engineering and Sciences, 2017, 11(2):2693-2710.
|
[4] |
谭耀武,杨济匡,王四文.轿车B柱耐撞性与轻量化优化设计研究[J].中国机械工程,2010,21(23):2887-2892.
|
|
TAN Y W, YANG J K, WANG S W. Study on optimal design of B-pillar for crashworthiness and light-weighting[J]. China Mechanical Engineering, 2010,21 (23): 2887-2892. (in Chinese)
|
[5] |
周冠. 新型负泊松比结构关键技术研究及其在车身设计中的应用[D].长沙:湖南大学,2015.
|
[6] |
MOHSENIZADEH S, ALIPOUR R, NEJAD A F, et al. Experimental investigation on energy absorption of auxe-tic foam-filled thin-walled square tubes under quasi-sta-tic loading[J]. Procedia Manufacturing, 2015, 2: 331-336.
|
[7] |
WANG C Y, LI Y, ZHAO W Z, et al. Structure design and multi-objective optimization of a novel crash box based on biomimetic structure[J]. International Journal of Mechanical Sciences, 2018, 138/139:489-501.
|
[8] |
WANG C Y, WANG W W, ZHAO W Z, et al. Reliability optimization of a novel negative Poisson′s ratio forepart for pedestrian protection[J]. Journal of Mechanical Engineering Science, doi: 10.1177/0954406217730441.
|
[9] |
王宗千,钱明军,周云波,等. 帕累托最优在新型蜂窝结构吸能盒防撞性能中的应用[J]. 南京理工大学学报, 2016, 40(5): 599-606.
|
|
WANG Z Q, QIAN M J, ZHOU Y B, et al. Application of Pareto optimality in crashworthiness of honeycomb structure crash box[J]. Journal of Nanjing University of Science and Technology, 2016, 40 (5): 599-606. (in Chinese)
|
[10] |
WANG C Y, ZOU S C, ZHAO W Z. Multi-objective optimization of a novel crash box with a three-dimensio-nal negative Poisson′s ratio inner core[J]. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering,2019,233(2):263-275.
|
|
|
|