新型可调动力吸振器设计及参数优化

李强; 董光旭; 张希农; 罗亚军; 张亚红; 谢石林

doi:10.7527/S1000-6893.2018.21721

航空学报 >

2018 , Vol. 39 >Issue 6: 221721 - 221721

DOI: https://doi.org/10.7527/S1000-6893.2018.21721

固体力学与飞行器总体设计

新型可调动力吸振器设计及参数优化

李强 ,
董光旭 ,
张希农 ,
罗亚军 ,
张亚红 ,
谢石林

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西安交通大学航天航空学院, 机械结构强度与振动国家重点实验室, 西安 710049

收稿日期: 2017-09-06

修回日期: 2018-03-20

网络出版日期: 2018-03-19

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Design and parameter optimization of a new tunable dynamic vibration absorber

LI Qiang ,
DONG Guangxu ,
ZHANG Xinong ,
LUO Yajun ,
ZHANG Yahong ,
XIE Shilin

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State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace, Xi'an Jiaotong University, Xi'an 710049, China

Received date: 2017-09-06

Revised date: 2018-03-20

Online published: 2018-03-19

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摘要

为有效抑制航天设备中由干扰源诱发的低频/超低频振动，提出了一种新型可调动力吸振器（NDVA）。该动力吸振器主要由柔性螺旋弹簧（SFS）及磁性负刚度弹簧（MNSS）组成。将所设计动力吸振器应用于振动控制时，采用平均法推导出系统在简谐激励下的稳态频响方程组及稳定性判据。基于稳定性分析，提出一种优化方法，通过简单迭代获得吸振器最优参数。最后，对提出吸振器的鲁棒稳定性进行分析。结果表明，除可实现低频振动有效抑制外，提出吸振器优越的鲁棒稳定性使得其在实际应用中能取得比线性吸振器更佳的振动控制效果。

关键词： 动力吸振器; 负刚度; 非线性; 鞍结分岔; 鲁棒稳定性

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李强 , 董光旭 , 张希农 , 罗亚军 , 张亚红 , 谢石林 . 新型可调动力吸振器设计及参数优化[J]. 航空学报, 2018 , 39(6) : 221721 -221721 . DOI: 10.7527/S1000-6893.2018.21721

Abstract

To effectively suppress the low-frequency or ultra-low-frequency vibration induced by the disturbances in aerospace equipment, a New tunable Dynamic Vibration Absorber (NDVA) with tuning stiffness is proposed in this paper. The implementation of the NDVA is mainly carried out by connecting a Spiral Flexure Spring (SFS) and a Magnetic Negative Stiffness Spring (MNSS). As the proposed NDVA is applied to suppression of resonance, the steady-state frequency response equations and the stability criterion under harmonic force are derived with the averaging method. Based on stability analysis, a new optimization method is offered to attain the optimal parameters with simple iteration. Robustness of the NDVA is analyzed. The results show that besides attenuating vibration in a large low-frequency range, the proposed NDVA can achieve better vibration reduction effect than the linear absorber due to its advantage of robustness in practical application.

Key words： dynamic absorber; negative stiffness; nonlinearity; saddle-node bifurcation; robustness

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