基于细化共振法辨识纤维增强复合薄板的非线性阻尼

doi:10.3901/JME.2020.12.009

机械工程学报 ›› 2020, Vol. 56 ›› Issue (12): 9-18.doi: 10.3901/JME.2020.12.009

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基于细化共振法辨识纤维增强复合薄板的非线性阻尼

李晖, 常永乐, 韩清凯, 闻邦椿

1. 东北大学机械工程与自动化学院沈阳 110819;
2. 东北大学航空动力装备振动及控制教育部重点实验室沈阳 110819

收稿日期:2019-06-06 修回日期:2019-10-29 出版日期:2020-06-20 发布日期:2020-07-14
通讯作者: 李晖(通信作者),男,1982年出生,副教授,博士,博士后。主要研究方向为复合材料结构减振降噪。E-mail:lh200300206@qq.com
作者简介:常永乐,男,1989年出生,研究生。主要研究方向为纤维增强复合薄板非线性振动测试。E-mail:631081103@qq.com;韩清凯,男,1969年出生,博士,教授,博士研究生导师。主要研究方向为非线性振动与机械动态设计、机械状态监测与故障诊断等。E-mail:qhan@dlut.edu.cn;闻邦椿,男,1930年出生,教授,博士研究生导师,中国科学院院士。
基金资助:
国家自然科学基金（51505070，51535082，U1708257）、中央高校基本科研业务费专项资金（N160313002，N160312001，N170302001，N180302004，N180703018，N180312012，N180313006）和装备预研重点实验室基金（6142905192512）资助项目。

Identification of Nonlinear Damping of Fiber-reinforced Composite Thin Plate with Vibration Amplitude Dependent Characteristics Based on Refined Resonance Method

LI Hui, CHANG Yongle, HAN Qingkai, WEN Bangchun

1. School of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819;
2. Key Laboratory of Vibration and Control of Aero-Propulsion Systems, Ministry of Education, Northeastern University, Shenyang 110819

Received:2019-06-06 Revised:2019-10-29 Online:2020-06-20 Published:2020-07-14

摘要/Abstract

摘要： 从频域细化角度，提出了细化共振法来准确辨识纤维增强复合薄板的非线性阻尼参数。首先，基于频率细化法和共振法理论，重新推导具有振幅依赖的复合薄板结构非线性阻尼的表达式，明确从频域测试角度获取非线性阻尼参数的理论原理。然后，通过仿真信号算例，验证了该方法的正确性，并讨论了频率分辨率和细化倍数对阻尼辨识精度的影响。最后，总结并概括出一套合理、规范的阻尼辨识流程，并对TC500碳纤维/树脂基复合薄板进行实际测试。研究发现，利用该方法可定量评价具有振幅依赖特点的复合薄板的非线性阻尼，且随着激励幅度的增大，其阻尼特性呈现逐步增大的趋势。

关键词: 纤维增强复合薄板, 非线性阻尼, 频域测试, 振幅依赖性, 细化共振法

Abstract: From the frequency refinement perspective, the refined resonance method is proposed to accurately identify the nonlinear damping parameters of fiber-reinforced composite thin plates. Firstly, based on frequency refining technique and resonance method theory, the expression of nonlinear damping of the composite plate with amplitude dependence is derived, and the theoretical principles of acquiring such nonlinear damping from the frequency-domain measurement are clarified. Then, the correctness of such method is verified by taking a simulation signal as an example, and the influences of frequency resolution and refining multiple on damping identification accuracy are discussed. Finally, a reasonable and standard test procedure is summarized and applied on the real measurement of TC500 carbon fiber/resin composite thin plate. It has been found that the proposed method can be used to quantitatively evaluate nonlinear damping of composite thin plate structure with amplitude dependent characteristics. And as the excitation amplitude increases, its damping property shows a gradually rising tendency.

Key words: fiber-reinforced composite thin plate, nonlinear damping, frequency-domain test, amplitude dependence, refined resonance method

中图分类号:

TB53

李晖, 常永乐, 韩清凯, 闻邦椿. 基于细化共振法辨识纤维增强复合薄板的非线性阻尼[J]. 机械工程学报, 2020, 56(12): 9-18.

LI Hui, CHANG Yongle, HAN Qingkai, WEN Bangchun. Identification of Nonlinear Damping of Fiber-reinforced Composite Thin Plate with Vibration Amplitude Dependent Characteristics Based on Refined Resonance Method[J]. Journal of Mechanical Engineering, 2020, 56(12): 9-18.

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基于细化共振法辨识纤维增强复合薄板的非线性阻尼

Identification of Nonlinear Damping of Fiber-reinforced Composite Thin Plate with Vibration Amplitude Dependent Characteristics Based on Refined Resonance Method

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