超低频或低频时滞吸振器和隔振器的基础理论和实验

This project is an applied fundamental research focused on suppressing ultra-low or low frequency vibration in structures or systems. The following three scientific problems are investigated, i.e., the modeling for the delayed vibration absorber and isolator in vibration systems with ultra-low or low frequency; the working mechanism of delayed vibration absorber and isolator for ultra-low or low frequency in broadband and the corresponding delayed control mechanism; the experimental study on the delayed vibration absorber and isolator for ultra-low or low frequency in broadband. The main objectives of the project are to build dynamic models for the delayed vibration absorber and isolator deployed in vibration structures with ultra-low or low frequency; to recognize and understand the modeling rule of geometrically nonlinear forces induced by vibration with low frequency; to reveal the mechanisms of vibration absorption and isolation for strongly nonlinear vibrations; and to propose the delayed control method which can be adjusted on the fly and the corresponding experimental implementation. In this project, it is expected that the basic theory of effective vibration suppression in broadband and smart online delayed control strategy can be formulated based on the research on dynamics of delayed systems with strong nonlinearity. It is also expected that the experimental prototypes of smart online vibration absorber and isolator working in broadband are manufactured to provide the foundation to design of delayed vibration absorber and isolator for ultra-low or low frequency. Meanwhile, this project also aims at training academic and industrial professionals in the field of vibration control and serving engineering applications driven by national demands.

本项目定位于应用基础性研究，针对超低频或低频振动结构或系统，通过对超低频或低频振动系统时滞吸振器和隔振器建模、 超低频或低频时滞频吸振器和隔振器宽频工作机制和时滞控制机理、超低频或低频时滞频吸振器和隔振器的实验研究等三个科学问题的研究，建立适用于针对超低频或低频结构的时滞吸振器和隔振器动力学模型，认识和理解超低频或低频振动引发的几何非线性力建模规律，揭示吸振器和隔振器对各种强非线性振动模式吸振和隔振的工作机制，提出实时调节的时滞控制方法和实验实现手段，探索研究强非线性的时滞动力学方法，形成具有宽频抑制振动有效性的基本理论和在线智能的时滞控制策略，期望实现在线化、智能化和宽频的吸振器和隔振器的实验样机，为超低频或低频时滞吸振器和隔振器提供设计基础。与此同时，培养振动控制研究和应用方面的专门人才，为国家需求的工程应用服务。

本项目针对超低频或低频振动结构或系统，通过以下三个科学问题：1. 超低频或低频振动系统时滞吸振器和隔振器建模；2. 超低频或低频时滞吸振器和隔振器宽频工作机制和时滞控制机理；3. 超低频或低频时滞吸振器和隔振器的实验研究的研究，建立系统精细化的非线性力模型，基于仿生概念提出了低频超低频的非线性吸振和隔振结构设计；阐明非线性动力学特性，利用非线性振动共振区振幅多解的特性清晰对超低频或低频振动的有效吸收和隔离机理，基于时滞反馈主动控制机理分析理解时滞对系统振动吸振和隔振优化；搭建低频仿生时滞隔振器和吸振器样机，验证了超低频或低频系统时滞吸振器和隔振器模型准确性。本项目形成具有宽频抑制振动有效性的基本理论和在线智能的时滞控制策略，期望实现在线化、智能化和宽频的吸振器和隔振器的实验样机，为超低频或低频时滞吸振器和隔振器提供设计基础。与此同时，培养振动控制研究和应用方面的专门人才，为国家需求的工程应用服务。.对上述三个科学问题的研究不仅提供了高新科学和技术发展所需的超低频或低频时滞吸振器和隔振器研究的理论和方法，并且帮助我们进一步深入认识非线性和时滞的来源并加以利用，深层次理解非线性时滞动力系统的特殊规律，项目在理论与实际工业应用研究领域开拓了新的研究方向，推动非线性动力学和非线性科学的发展。.基于本项目的支持，共发表相关期刊论文43篇，其中SCI索引40篇；在项目资助下已经毕业博士研究生6人；项目主持人与参与人多次被邀请做国内外重要国际会议邀请报告。