Rollover crashworthiness analysis and optimization of bus frame for conceptual design

At the conceptual design stage, utilizing the detailed model to determine the rollover crashworthiness of bus structure would need long design cycle. Currently, rectangular thin-walled beams (RTWBs) are extensively used to create the real bus because of the excellent manufacturability. Remarkably, dual rectangular thin-walled beams (DRTWBs) can generate higher bending resistance. Therefore, this paper presents a rollover crashworthiness analysis and optimization method of bus frame using the RTWBs and DRTWBs. The bus frame with tire, suspension and platform structures is created in the CarFrame software. Analysis numerical example verifies that the frame model, which reduces the modeling and computational costs, is in excellent agreements with the detailed model, and optimization numerical example verifies that the frame model can obtain high rollover crashworthiness and lightweight bus structure. Therefore, the frame model can effectively replace the detailed model for the rollover crashworthiness analysis and optimization.

[1]  Cho-Chung Liang,et al.  Optimization of bus rollover strength by consideration of the energy absorption ability , 2010 .

[2]  Stijn Donders,et al.  A reduced beam and joint concept modeling approach to optimize global vehicle body dynamics , 2009 .

[3]  Dong-Chul Han,et al.  Vehicle Frontal Crashworthiness Analysis by Simplified Structure Modeling using Nonlinear Spring and Beam Elements , 1996 .

[4]  Wenjie Zuo,et al.  Cross-sectional shape optimisation for thin-walled beam crashworthiness with stamping constraints using genetic algorithm , 2017 .

[5]  Kwang-Woo Jeon,et al.  A study on the crashworthiness and rollover characteristics of low-floor bus made of sandwich composites , 2009 .

[6]  Cho-Chung Liang,et al.  Bus rollover crashworthiness under European standard: an optimal analysis of superstructure strength using successive response surface method , 2009 .

[7]  Antonio Miravete,et al.  Intercity bus rollover simulation , 2001 .

[8]  Haobin Jiang,et al.  Parametric modeling and multiobjective crashworthiness design optimization of a new front longitudinal beam , 2018, Structural and Multidisciplinary Optimization.

[9]  Haobin Jiang,et al.  Multi-objective reliability-based design optimization for the VRB-VCS FLB under front-impact collision , 2018, Structural and Multidisciplinary Optimization.

[10]  Wenjie Zuo,et al.  Cross-sectional shape design of automobile structure considering rigidity and driver's field of view , 2018, Adv. Eng. Softw..

[11]  K. Saitou,et al.  Multi-material topology optimization using ordered SIMP interpolation , 2016, Structural and Multidisciplinary Optimization.

[12]  Liangjin Gui,et al.  Multi-objective optimization for bus body with strength and rollover safety constraints based on surrogate models , 2011 .

[13]  T. Belytschko,et al.  Large displacement, transient analysis of space frames , 1977 .

[14]  Qing Li,et al.  Bending characteristics of top-hat structures through tailor rolled blank (TRB) process , 2018 .

[15]  Liming Zhou,et al.  A valid inhomogeneous cell-based smoothed finite element model for the transient characteristics of functionally graded magneto-electro-elastic structures , 2019, Composite Structures.

[16]  Xiao Chen,et al.  Experimental investigation on structural collapse of a large composite wind turbine blade under combined bending and torsion , 2017 .

[17]  C. C. Liang,et al.  Analysis of bus rollover protection under legislated standards using LS-DYNA software simulation techniques , 2010 .

[18]  Xiong Zhang,et al.  Bending resistance of thin-walled multi-cell square tubes , 2016 .

[19]  Gang Zheng,et al.  Design for cost performance of crashworthy structures made of high strength steel , 2019, Thin-Walled Structures.

[20]  Wenjie Zuo,et al.  Simplified crashworthiness method of automotive frame for conceptual design , 2018, Thin-Walled Structures.

[21]  Wenjie Zuo,et al.  Component sensitivity analysis of conceptual vehicle body for lightweight design under static and dynamic stiffness demands , 2014 .

[22]  Yunkai Gao,et al.  Fatigue optimization with combined ensembles of surrogate modeling for a truck cab , 2014 .

[23]  S.-J. Park,et al.  Rollover analysis for the body section structure of a large bus using beam and non-linear spring elements , 2008 .

[24]  Xiaolei Yan,et al.  Multi-objective topology optimization of a vehicle door using multiple material tailor-welded blank (TWB) technology , 2018, Adv. Eng. Softw..

[25]  Sandro Mihradi,et al.  Finite Element Analysis of Bus Rollover Test in Accordance with UN ECE R66 Standard , 2017 .

[26]  Zong Wang,et al.  Bending collapse of multi-cell tubes , 2017 .

[27]  B. L. Boada,et al.  Torsional stiffness and weight optimization of a real bus structure , 2010 .

[28]  C. Kim,et al.  Evaluation of the axial crashworthiness of thin-walled structures with various and combined cross sections , 2018, Journal of Mechanical Science and Technology.

[29]  Xiaojiang Lv,et al.  Multiobjective reliability-based optimization for crashworthy structures coupled with metal forming process , 2017, Structural and Multidisciplinary Optimization.

[30]  Stephen R Reid,et al.  Bending collapse of thin-walled rectangular section columns , 2001 .