Crashworthiness optimization of VRB thin-walled structures under manufacturing constraints by the eHCA-VRB algorithm
Crashworthiness optimization of VRB thin-walled structures under manufacturing constraints by the eHCA-VRB algorithm
复制标题
利用 eHCA-VRB 算法在制造约束下对 VRB 薄壁结构进行耐撞性优化
DOI：
10.1016/j.apm.2019.11.030
复制
发表时间：
2020-04
影响因子：
5
通讯作者：
Xiao Ningcong
中科院分区：
文献类型：
--
作者：
Duan Libin;Jiang Haobin;Li Huanhuan;Xiao Ningcong
变厚度轧制板是制造轻质结构的重要途径。然而，在制造约束下的VRB薄壁结构的耐撞性和厚度分布的优化是一个非线性动力响应结构优化问题，有大量的设计变量。针对这一问题，对薄壁结构混合元胞自动机（HCATWS）算法进行了扩展和改进，提出了一种扩展的VRB薄壁结构混合元胞自动机（eHCA-VRB）算法。该算法由一个外循环和一个内循环组成。外环执行碰撞模拟分析以定义内环的适当目标质量，而内环根据当前单元及其相邻单元的内部能量密度（IED）来调整单元厚度，使得设计域中的IED变得均匀分布。根据变截面薄壁构件的厚度分布，定义了沿着轧制方向的一维元胞自动机模型。此外，eHCA-VRB算法还生成一维CA模型和FE模型之间的映射关系。为了优化制造约束下的VRB薄壁结构的厚度分布，我们的方法使用单元厚度作为设计变量，并将VRB轧制过程中的单元厚度更新规则的约束。为了验证eHCA-VRB算法的收敛性和有效性，对有/无制造约束（M.C.）的VRB顶帽薄壁结构进行了耐撞性优化，分别结果表明，eHCA-VRB算法可以有效地解决制造约束下VRB薄壁结构的耐撞性和厚度分布优化问题。
Variable-thickness rolled blanks (VRBs) represent an important approach for constructing lightweight structures. However, the optimization of the crashworthiness and thickness distribution of VRB thin-walled structures under manufacturing constraints is a nonlinear dynamic-response structural-optimization problem that has a large number of design variables. To tackle this problem, this paper has extended and improved the hybrid cellular automaton for thin-walled structures (HCATWS) algorithm, and has proposed an extended hybrid cellular automaton for VRB thin-walled structures (eHCA-VRB) algorithm. This algorithm consists of an outer loop and an inner loop. The outer loop performs crash simulation analysis to define an appropriate target mass for the inner loop, whereas the inner loop adjusts cell thicknesses according to the internal energy density (IED) of the current cell and its neighboring cells so that the IED in the design domain becomes evenly distributed. A one-dimensional CA model is defined along with the rolling direction based on the thickness distribution of VRB thin-walled structures. Furthermore, the eHCA-VRB algorithm also generates a mapping relationship between the one-dimensional CA model and the FE model. To optimize the thickness distribution of VRB thin-walled structures under manufacturing constraints, our method uses cell thickness as a design variable and incorporates the constraints of the VRB rolling process in the cell thickness update rules. To verify the convergence and efficiency of the eHCA-VRB algorithm, VRB top-hat thin-walled structures are optimized for crashworthiness with/or without manufacturing constraints (M.C.), respectively. The results show that the eHCA-VRB algorithm can be used to efficiently solve the optimization problems of crashworthiness and the thickness distribution of VRB thin-walled structures under manufacturing constraints.
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影响因子：
6.4
作者：
Fengxiang Xu
通讯作者：
Fengxiang Xu
DOI：
10.1145/2598394.2605342
发表时间：
2014-07
期刊：
Proceedings of the Companion Publication of the 2014 Annual Conference on Genetic and Evolutionary Computation
影响因子：
--
作者：
A. Engelbrecht
通讯作者：
A. Engelbrecht
影响因子：
3.9
作者：
P. Hajela;Byong Kim
通讯作者：
P. Hajela;Byong Kim
DOI：
10.1016/b978-0-12-409547-2.14581-0
发表时间：
2020
期刊：
Comprehensive Chemometrics
影响因子：
--
作者：
Federico Marini;Beata Walczak
通讯作者：
Federico Marini;Beata Walczak
新型前纵梁参数化建模与多目标耐撞性设计优化
影响因子：
3.9
作者：
Duan Libin;Jiang Haobin;Geng Guoqing;Zhang Xuerong;Li Zhanjiang
通讯作者：
Li Zhanjiang