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1.中国人民解放军63768部队,西安 710600
2.国防科技大学 空天科学学院,长沙 410073
3.空天任务智能规划与仿真湖南省重点实验室,长沙 410073
4.北京宇航系统工程研究所,北京 100076
陈超磊,男,2000年生,江西宜春人,助理工程师;主要研究方向为结构优化;E-mail:2290669225@qq.com。
收稿日期:2023-08-13,
修回日期:2023-09-01,
纸质出版日期:2025-04-15
移动端阅览
陈超磊,王志祥,雷勇军,等. 数据驱动的大型运载火箭加筋圆锥壳多保真度近似建模优化[J]. 机械强度,2025,47(4):148-157.
CHEN Chaolei,WANG Zhixiang,LEI Yongjun,et al. Data driven multi-fidelity approximate modeling optimization of stiffened conical shell for large launch vehicle[J]. Journal of Mechanical Strength,2025,47(4):148-157.
陈超磊,王志祥,雷勇军,等. 数据驱动的大型运载火箭加筋圆锥壳多保真度近似建模优化[J]. 机械强度,2025,47(4):148-157. DOI: 10.16579/j.issn.1001.9669.2025.04.018.
CHEN Chaolei,WANG Zhixiang,LEI Yongjun,et al. Data driven multi-fidelity approximate modeling optimization of stiffened conical shell for large launch vehicle[J]. Journal of Mechanical Strength,2025,47(4):148-157. DOI: 10.16579/j.issn.1001.9669.2025.04.018.
为提高大型运载火箭加筋圆锥壳舱段结构轴压承载效率,开展了数据驱动的加筋圆锥壳多保真度近似建模轻量化设计。针对单保真度近似建模优化方法效率不高、精度不足等问题,搭建了基于变可信度期望改进(Variable-Fidelity Expected Improvement
VF-EI)加点准则的数据驱动多保真度近似建模优化框架,并据此开展加筋圆锥壳结构轻量化设计。综合利用不同网格规模的加筋圆锥壳有限元模型,建立了加筋圆锥壳极限承载的Co-Kriging多保真度近似模型;优化迭代中,利用VF-EI加点准则生成多保真度采样点,以此序列提升Co-Kriging多保真度近似模型的全局和局部近似精度。典型数值和工程算例验证了上述方法的有效性,相比径向基函数近似模型和Kriging模型,Co-Kriging多保真度近似建模优化方法的效率和精度更高,获得了相比初始设计减重11.5%的优化加筋圆锥壳结构,具有一定的工程应用价值。
In order to improve the load-bearing efficiency of the stiffened conical shell in large launch vehicle
the lightweight design of the stiffened conical shell was carried out via a data-driven multi-fidelity approximate modeling optimization method.Aiming at the problems such as low efficiency and insufficient accuracy of the single fidelity approximate modeling optimization method
a data-driven multi-fidelity approximate modeling optimization framework was built based on variable-fidelity expected improvement (VF-EI) point criterion,and accordingly the optimization design of stiffened conical shell structure was carried out.Based on the finite element models of stiffened conical shells with different mesh sizes
a Co-Kriging multi-fidelity approximate model for the collapse load of stiffened conical shells was established.In the optimization iteration
multi-fidelity sampling points were generated by using VF-EI point criterion
and the global and local approximation accuracy of Co-Kriging multi-fidelity approximation model was improved sequently.Moreover
the optimization efficiency and accuracy of the proposed method were demonstrated by comparing with radial basis function approximation model and Kriging model. Besides
11.5% weight reduction of the optimized stiffened conical shell structure is obtained compared with the initial design
which has certain engineering application value.
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