基于集中质量法的纤维增强复合材料的损伤定位

doi:10.12068/j.issn.1005-3026.2020.02.015

东北大学学报:自然科学版 ›› 2020, Vol. 41 ›› Issue (2): 234-240.DOI: 10.12068/j.issn.1005-3026.2020.02.015

基于集中质量法的纤维增强复合材料的损伤定位

李晖^1,2,3，徐忠浩^1,2，王东升^1,2，祖旭东⁴

(1.东北大学机械工程与自动化学院，辽宁沈阳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，辽宁沈阳110819； 3.利物浦大学工程学院，英国利物浦L69 3GQ； 4.南京理工大学机械工程学院，江苏南京210094)

收稿日期:2019-05-22 修回日期:2019-05-22 出版日期:2020-02-15 发布日期:2020-03-06
通讯作者: 李晖
作者简介:李晖(1982-)，男，内蒙古丰镇人，东北大学副教授，博士.
基金资助:
国家自然科学基金资助项目(51505070，51535082)；国家自然科学基金委员会-辽宁省人民政府联合基金资助项目(U1708257); 中央高校基本科研业务费专项资金资助项目(N160313002，N160312001，N170302001，N180313006)；国家留学基金委资助项目(201806085032).

Damage Location of Fiber-Reinforced Composites Based on Lumped Mass Approach

LI Hui^1,2,3， XU Zhong-hao^1,2， WANG Dong-sheng^1,2， ZU Xu-dong⁴

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

Received:2019-05-22 Revised:2019-05-22 Online:2020-02-15 Published:2020-03-06
Contact: LI Hui
About author:-
Supported by:
-

摘要/Abstract

摘要： 研究了纤维增强复合材料的损伤定位方法，将其命名为“指数幂逼近-集中质量法”.首先，以纤维增强复合材料梁结构为例建立集中质量模型；然后通过理论求解获得未损伤梁的刚度矩阵，结合测试获得的固有频率和正则化的模态振型数据，获得梁结构损伤后的残差力向量，并将其作为关键定位指标；并基于指数幂思想对损伤梁结构的质量块数量进行划分，提出损伤位置逼近判定准则，确定一套规范的损伤定位流程.最后，对带有不同纤维断裂损伤的T300碳纤维/树脂基复合材料梁进行实例研究，研究发现本文提出的定位方法可有效辨识获得复合材料梁的损伤位置.

关键词: 集中质量法, 指数幂逼近, 纤维增强复合材料, 残差力向量, 损伤定位

Abstract: A method for locating the damage of fiber-reinforced composites(FRCs) is studied， which is named as the ‘exponential approximation-lumped mass approach’. Firstly， a lumped mass model is established for a FRCs beam structure. Then， the stiffness matrix of the undamaged beam is obtained by theoretical calculation， and the residual force vector of the beam with damage is determined as the key locating index based on the measured natural frequencies and the regularized modal shape data. Furthermore， a criterion is proposed for approximating the position of damage， so that a set of standard procedures for the damage locating can be determined. Finally， a T300 carbon fiber/resin composite beam with different fiber breakage damages is studied as a case and it is found that the as-proposed damage locating approach can effectively identify the damage positions of the composite beam.

Key words: objective, interval particle, intervallumped mass approach, exponential approximation, fiber-reinforced composite, residual force vector, damage location

中图分类号:

TB535

李晖，徐忠浩，王东升，祖旭东. 基于集中质量法的纤维增强复合材料的损伤定位[J]. 东北大学学报:自然科学版, 2020, 41(2): 234-240.

LI Hui， XU Zhong-hao， WANG Dong-sheng， ZU Xu-dong. Damage Location of Fiber-Reinforced Composites Based on Lumped Mass Approach[J]. Journal of Northeastern University Natural Science, 2020, 41(2): 234-240.

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基于集中质量法的纤维增强复合材料的损伤定位

Damage Location of Fiber-Reinforced Composites Based on Lumped Mass Approach

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