Resistance of all-metallic honeycomb sandwich structures to underwater explosion shock

WEI Zihan; ZHAO Zhenyu; YE Fan; PEI Yiqun; WANG Xin; ZHANG Qiancheng; LU Tianjian

doi:10.11883/bzycj-2020-0392

Volume 41 Issue 8

Aug. 2021

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WEI Zihan, ZHAO Zhenyu, YE Fan, PEI Yiqun, WANG Xin, ZHANG Qiancheng, LU Tianjian. Resistance of all-metallic honeycomb sandwich structures to underwater explosion shock[J]. Explosion And Shock Waves, 2021, 41(8): 083104. doi: 10.11883/bzycj-2020-0392

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Resistance of all-metallic honeycomb sandwich structures to underwater explosion shock

doi: 10.11883/bzycj-2020-0392

WEI Zihan^{1, 2
,},
ZHAO Zhenyu^{2, 3
,
,},
YE Fan⁴,
PEI Yiqun⁵,
WANG Xin^{1, 2},
ZHANG Qiancheng¹,
LU Tianjian^{2, 3
,
,}

1.
State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University, Xi’an 710049, Shaanxi, China
2.
MIIT Key Laboratory of Multifunctional Lightweight Materials and Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, Jiangsu, China
3.
State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, Jiangsu, China
4.
Marine Design and Research Institute of China, Shanghai 200011, China
5.
Shanghai Shipbuilding Technology Research Institute, Shanghai 200032, China

Received Date: 2020-10-16
Rev Recd Date: 2021-01-14

Available Online: 2021-07-22

Publish Date: 2021-08-05

Abstract

Abstract

All-metallic honeycomb sandwich structure is a new kind of ship protection structure, which has a broad application prospect in the field of ship protection. However, there is not enough research on the dynamic response of honeycomb sandwich structures under an actual underwater explosion load. The dynamic behavior and protective performance of honeycomb sandwich structures subjected to the underwater explosion load were investigated, both experimentally and numerically. A backplane stiffened honeycomb sandwich structure and the corresponding buoyant box were designed and fabricated for the subsequent experimental study in a large open water pool. The structural response was numerically simulated by using the coupled acoustic-structural approach (integrated in commercial FE code ABAQUS/Explicit). The numerical simulation results are in good agreement with the experimental measurements. Then, the deformation process and energy absorption characteristics of the honeycomb sandwich structure subjected to underwater explosion load were investigated. The effects of the load parameter (impact factor) and two geometric parameters (i.e., facesheet thickness ratio and core relative density) on the dynamic response of the sandwich structure were analyzed. Finally, the Pareto optimal designs with minimize value of non-dimensional areal density and minimize value of non-dimensional maximum deformation of the central point on back facesheet were obtained by using the NSGA-Ⅱ algorithm. The results show that with the increase of the impact factor, the overall deformation of the structure increases significantly. The honeycomb core is the main energy absorbing substructure during this process, and its energy absorption ratio gradually decreases. With the increase of either face sheet thickness ratio or core relative density, the deformation of the structure first decreases and then increases, accompanied by changes in deformation modes. The influence of core relative density is more significant. The optimized structures obtained from multi-objective optimal design effectively reduce the areal density and the maximum deformation, which can be used as a reference for the future design of honeycomb sandwich structures.
- honeycomb sandwich,
- underwater explosion,
- coupled acoustic-structural simulation,
- optimal design

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