可编程超材料的动力学及调控机理

The programmable metamaterials refer to the reconfigurable matter that exhibit a series of pre-designed extraordinary properties, which are triggered by external multi-physical field. However, to date, the design schemes for such devices are based on trial-assembling method, the general rules and standards for rational designing such devices were not found yet. This proposal aims at exploring the mechanism of linear and nonlinear dynamics and multi-physical field tuning for programmable metamaterials, fabricating smart devices with customized dynamical response and presenting the general law and methodologies for designing and tuning such devices. This project will unveil the nonlinear and non-smooth dynamics of different micro-structures. A comprehensive theoretical framework of multi-physical field instruction，microstructure phase-change and overall dynamical properties will be established. Moreover, the research is expected to unveil some abnormal dynamical phenomena, which can extend the theoretical scope of linear and nonlinear dynamics. The research results will lay the foundation of industrial equipment fabrication, enabling flexible manipulation for dynamical properties, providing enhanced stability and reducing resistance and consumption.

可编程超材料是一种可重构人工材料，可通过外部多物理场诱发使其产生一系列预设的超常物理性质和力学性能。但是，当前可编程超材料的设计方案存在试凑的性质，人们尚未找到理性的设计准则和一般规律。本项目旨在探索可编程超材料的线性和非线性动力学机理，设计并制造动力学响应可“自定义”的智能器件，并提出可编程超材料多场调控的一般规律和方法。揭示不同人工微结构的非线性和非光滑动力学行为,建立完整的多物理场指令、微结构响应与相变、宏观器件动力学的理论框架。同时，本项目预期可发现某些反常的动力学现象，这将拓展经典线性和非线性动力学的理论范畴。研究结果将为装备制造领域提供新的技术储备，如更加灵活操控机械的动力学性能、提升稳定性、降低阻耗等。

可编程超材料可看做是一种可重构的人工材料，可通过外部的机械波相互作用产生一系列预设的超常物理性质和力学性能。但到目前为止，可编程超材料的设计方案存在试凑的性质，人们尚未找到理性的设计准则和一般规律。本项目探索了可编程超材料非线性动力学机理，设计并制造动力学响应可“自定义”的智能器件，提出了可编程超材料在电场调控的建模和分析方法。发现了一些新的动力学现象，如虚拟模态等。本项目还尝试将已有超材料微结构应用于航天飞行器的减冲击环装置中，取得了较好的减振降噪效果。项目完成了全部研究内容和达到了计划目标，发表SCI检索论文9篇，获得国内外领域内专家的正面评价。研究结果被Phys. Today等媒体报道。

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