Study and Optimization of Helicopter Subfloor Energy Absorption Structure with Foldcore Sandwich Structures

2017 4th International Conference on Advanced Materials, Mechanics and Structural Engineering

材料科学;机械制造

Hua, Zhi Zhou^1 ; Wang, Zhijin^1

Key Lab. of Fundamental Science for National Defence - Advanced Design Technology of Flight Vehicles, Nanjing University of Aeronautics and Astronautics, 29 YuDao Street, Nanjing

210016, China^1

关键词: Buffering capacities;    Energy absorption capacity;    Energy absorption structure;    Helicopter subfloor;    High-energy absorption;    Kriging surrogate model;    Optimization method;    Original structures;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/269/1/012022/pdf
DOI  :  10.1088/1757-899X/269/1/012022

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The intersection element is an important part of the helicopter subfloor structure. In order to improve the crashworthiness properties, the floor and the skin of the intersection element are replaced with foldcore sandwich structures. Foldcore is a kind of high-energy absorption structure. Compared with original structure, the new intersection element shows better buffering capacity and energy-absorption capacity. To reduce structure's mass while maintaining the crashworthiness requirements satisfied, optimization of the intersection element geometric parameters is conducted. An optimization method using NSGA-II and Anisotropic Kriging is used. A significant CPU time saving can be obtained by replacing numerical model with Anisotropic Kriging surrogate model. The operation allows 17.15% reduce of the intersection element mass.