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Home > Archive>Volume 52, Issue 7, 2024 >1032-1039. DOI:10.11908/j.issn.0253-374x.23421
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Energy-Absorption and Vibration-Attenuation Design Using Shell-Based Mechanical Metamaterials
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1.Unmanned System Research Institute， Northwestern Polytechnical University，Xi’an 710072， China;2.Beijing Institute of Astronautical Systems Engineering，Beijing 100076， China;3.Institute of Advanced Structure Technology， Beijing Institute of Technology， Beijing 100081， China;4.School of Aerospace Engineering， Tsinghua University， Beijing 100084， China

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0344

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    Abstract:

    Explosion and impact loadings pose a serious threat to the service safety of defense and industrial equipment. Energy-absorbing materials can effectively reduce structural vibration and the damage caused by impact. Traditional energy-absorbing materials， such as aluminum foam， have a relatively limited design space. Therefore， it is urgent to develop new energy-absorbing materials. In this paper， the energy-absorbing mechanism of porous materials was systematically investigated based on numerical modelling of the impact process. The simulation results indicate that energy-absorbing materials can have a good shock absorption performance only when the strength is appropriate. In order to realize customized design of energy-absorbing materials， shell-based mechanical metamaterials with different energy-absorbing characteristics were designed based on the machine learning and genetic algorithm. The effectiveness of the newly designed metamaterials in energy-absorption and vibration-attenuation was verified through simulation results. This study can provide important technical guidelines for the design and optimization of new energy-absorbing materials.

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LIU Jiajia, ZHANG Junjian, GONG Linhui, GAO Lijun, LIAO Guoliang, WANG Yongzhen, ZENG Qinglei. Energy-Absorption and Vibration-Attenuation Design Using Shell-Based Mechanical Metamaterials[J].同济大学学报(自然科学版),2024,52(7):1032~1039

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  • Received:November 24,2023
  • Online: July 30,2024
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