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| 弹磁强化能量阱瞬态动力学响应实验研究 |
| Experimental research on transient dynamic response of elastic magnetism reinforced energy sink |
| Received:January 09, 2022 Revised:April 04, 2022 |
| DOI：10.7520/1001-4888-22-008 |
| 中文关键词: 弹磁元件 非线性能量阱 永磁铁 动力学响应 |
| 英文关键词:elastic magnetismelement nonlinear energy sink permanent magnet dynamic response |
| 基金项目:国家自然科学基金(11872274， 12172376) |
| Author Name | Affiliation | | YAN Xu | 1.Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control, School of Mechanical Engineering, Tianjin University of Technology, Tianjin 300384, China
2.National Demonstration Center for Experimental Mechanical and Electrical Engineering Education, Tianjin University of Technology, Tianjin 300384, China | | CHEN Jianen* | 1.Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control, School of Mechanical Engineering, Tianjin University of Technology, Tianjin 300384, China
2.National Demonstration Center for Experimental Mechanical and Electrical Engineering Education, Tianjin University of Technology, Tianjin 300384, China | | DONG Bokang | 1.Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control, School of Mechanical Engineering, Tianjin University of Technology, Tianjin 300384, China
2.National Demonstration Center for Experimental Mechanical and Electrical Engineering Education, Tianjin University of Technology, Tianjin 300384, China | | LI Shuangbao | 3.College of Science, Civil Aviation University of China, Tianjin 300300, China |
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| 中文摘要: |
| 为提升传统刚度基立方非线性能量阱的性能，在立方刚度振子两侧加入弹磁元件，从而构造出一种新型弹磁强化非线性能量阱，通过实验研究了该能量阱的瞬态动力学响应。弹磁元件是由压缩弹簧和安装在弹簧上的永磁铁构成的，该磁铁与安装在质量块上的磁铁之间存在斥力。当立方振子进行往复运动时，磁斥力可以对振子的响应进行调节。在不同初始位移下，对比研究了加入磁铁前后振子的位移响应之间的差异，分析了弹磁元件对振子的弹性势能与衰减至平衡状态所需时间的影响，并研究了压缩弹簧的线径和弹磁间隙对振子响应的影响。结果表明，当线径较小时，安装弹磁元件的振子在绝大部分情况下振动衰减时间更短，弹性势能更小；当线径较大且初始位移较大时，则安装弹磁元件的振子的振动衰减时间较长，弹性势能较大。 |
| 英文摘要: |
| In order to improve the performance of the traditional stiffness-based cubic nonlinear energy sink, an elastic magnetism element was added on both sides of the cubic oscillator to construct a new type of elastic magnetism nonlinear energy sink. The transient dynamic responses of the nonlinear energy sink were experimentally studied in order to grasp its basic characteristics. The so-called elastic magnetism element refers to the permanent magnets connected to the compression springs and the mass of the nonlinear energy sink to produce a magnetic repulsion. When the mass block started to reciprocate, the magnetic repulsion can adjust its responses. This paper comparatively studied the differences in displacement responses of the mass with and without the elastic-magnetic element for different impact loads. The elastic potential energy and the decay time to reach the equilibrium of the mass in the two cases were investigated. The influences of the stiffness of the compression springs and the elastic-magnetic gaps on the responses of the mass were studied. The results show that when the wire diameter is small, the mass block with the elastic magnetism element has a shorter decay time and a smaller elastic potential energy in most cases. When the wire diameter and the initial displacement are larger, the mass block without the elastic magnetism element has a shorter decay time and a smaller elastic potential energy. |
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