低频大幅隔振器设计及实验
Design and Experiment of a Vibration Isolator for Low Frequency and Large Amplitude Excitation
孙秀婷 1孙英超 2钱佳伟 2徐鉴2
作者信息
- 1. 同济大学 航空航天与力学学院,上海 200092;同济大学 民航航空器结构智能辅助适航重点实验室,上海 200092
- 2. 同济大学 航空航天与力学学院,上海 200092
- 折叠
摘要
为了突破传统隔振器刚度和承载能力之间的矛盾,需要隔振器具有高的静态刚度,低动态刚度的特性.如今的准零刚度隔振器技术可以实现低频微幅隔振,但是对于大幅振动,隔振效果并不明显甚至失效,因此突破宽幅隔振成为隔振领域亟待解决的问题.为此,我们利用多稳态折纸通过并联装配的方式,构造具有宽幅零刚度区间的折纸型隔振器,以解决传统隔振器振动抑制幅值较低的问题.本文建立了宽零刚度隔振器模型,提出宽幅零刚度的设计方法,并通过动力学分析分析了模型的隔振效果.最后搭建试验样机,验证了理论的正确性.这种设计打破了传统准零刚度隔振器单点准零的设计准则,能够在一个大幅范围内保证稳定性,同时实现零刚度,极大拓宽了隔振器的适用范围.这种设计理念能够被用在新隔振材料设计和航空、船舶等大幅低频动态环境中.
Abstract
Vibration isolators with high-static-low-dynamic-stiffness (HSLDS) characteristics are re-quired in order to break through the contradiction between the stiffness and the load bearing capacity of the traditional vibration isolator. Nowadays, quasi-zero-stiffness vibration isolator technology can realize low-frequency vibration isolation under a small amplitude, but for large amplitude vibration, the vibra-tion isolation effect is weakened or even ineffective. Therefore, wide-range amplitude vibration isolation has become a problem to be solved in the field of vibration isolation. In order to solve the problem of small vibration suppression amplitude of traditional vibration isolators, a parallel-assembly origami vi-bration isolator with wide zero stiffness range is proposed. The dynamic model of the origami vibration i-solator with wide zero stiffness range is established, and design methodology for wide zero stiffness range is proposed. Based on the dynamic model, the vibration isolation effectiveness is analyzed. Final-ly, the correctness of the dynamic analysis is verified experimentally. This new design breaks through the design criterion of the traditional quasi-zero stiffness isolator that zero stiffness is only achieved at a specific point. Stability can be guaranteed over a large range, while achieving zero stiffness, which great-ly broadens the application range of vibration isolators. This design concept can be used in the design of new vibration isolation materials and in large low-frequency dynamic environments such as aerospace and ships.
关键词
宽范围零刚度/高静低动系统/非线性隔振/低频激励Key words
wide range zero stiffness/high-static-low-dynamic-stiffness systems/nonlinear vibration isolation/low frequency excitation引用本文复制引用
基金项目
国家自然科学基金(11932015)
国家自然科学基金(12122208)
国家自然科学基金(12372002)
国家自然科学基金(12372043)
中央高校基本科研业务费专项()
出版年
2024
NETL
NSTL
万方数据