南京航空航天大学学报（英文版）2024，Vol.41Issue(3)：359-371,13.DOI:10.16356/j.1005-1120.2024.03.008
考虑入水冲击过程的舱段结构优化
Optimization of a Cabin Structure Considering the Water-Entry Process
摘要
Abstract
The cabin structure of amphibious aircraft needs to withstand the impact force in the process of water-entry,which will affect the performance of amphibious aircraft significantly.A baseline cabin structure for an amphibious aircraft is established.According to the cabin geometry,the pressure distribution on the cabin during the water-entry process is obtained by numerical simulation.A finite element model of the cabin structure is established and the parametric study is carried out to obtain the effects of different design parameters on the cabin structure.Then,a framework is built to optimize the cabin structure,with the structural deformation and stress distribution during the water-entry process taken into account.In the optimization,the strain and stress are regarded as the constraints and the structure mass is the objective.After the optimization,the optimized design is further verified using the one-way coupling analysis method.The results show that the distribution of internal stringers and the thickness of the bottom skin have a significant influence on the maximum von Mises stress.By optimizing the design parameters of the cabin structure,the structure mass can be significantly reduced while the structural strength and stiffness can satisfy the constraints simultaneously.关键词
舱段结构/水陆两栖飞机/流固耦合/入水冲击/结构优化Key words
cabin structure/amphibious aircraft/fluid-structure interaction/water-entry/structural optimization分类
航空航天引用本文复制引用
何子懿,王晨,胡奇,董松文,张雨,沈星,张军..考虑入水冲击过程的舱段结构优化[J].南京航空航天大学学报（英文版）,2024,41(3):359-371,13.基金项目
The work was supported by the Na-tional Natural Science Foundation of China(No.52305262)and the Starting Grant of Nanjing University of Aeronautics and Astronautics(No.1001-YQR22056). （No.52305262）
