| 冯侃,Xiaojing Gong,Olivier Sicot,励争*.复合材料板冲击损伤检测的二维间隔平滑法[J].实验力学,2013,28(2):173~179 |
| 复合材料板冲击损伤检测的二维间隔平滑法 |
| Two-Dimensional Gapped Smoothing Method for Impact Damage Detection of Composite Laminates |
| 投稿时间：2012-10-26 修订日期：2013-01-08 |
| DOI：10.7520/1001-4888-12-147 |
| 中文关键词: 损伤检测 复合材料板 二维间隔平滑法 工作变形 |
| 英文关键词:damage detection composite laminate board two-dimensional gapped smoothing method operational deflection shapes |
| 基金项目:国家高技术研究发展计划(863计划)(2012AA040209);国家自然科学基金项目(11172003) |
| 作者 | 单位 | | 冯侃 | 北京大学 工学院 力学与空天技术系, 湍流与复杂系统国家重点实验室, 北京 100871 | | Xiaojing Gong | Département de Recherche en Ingénierie des Véhicules pour l′Environnement (DRIVE), l′Institut Supérieur de l′Automobile et des Transports (ISAT), University of Burgundy, France 21078 | | Olivier Sicot | Département de Recherche en Ingénierie des Véhicules pour l′Environnement (DRIVE), l′Institut Supérieur de l′Automobile et des Transports (ISAT), University of Burgundy, France 21078 | | 励争* | 北京大学 工学院 力学与空天技术系, 湍流与复杂系统国家重点实验室, 北京 100871 |
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| 中文摘要: |
| 本文发展了一种基于振动的复合材料板的损伤检测方法,将原有的一维间隔平滑法(1D GSM, one dimensional gapped smoothing method)发展至二维(2D GSM),并进一步提出二维间隔平滑法的标准化损伤指标。与其他多数基于振动分析的损伤检测方法不同,该方法只需分析含有损伤结构的检测数据,无需结构健康时的数据或理论、计算结果作为对比信号,即可判定缺陷的存在,并能准确定位。针对由冲击造成的准各向同性碳纤维增强复合材料板中的层裂损伤,本文采用压电片阵列组合激励的方式,得到了复合材料板多频率扭转振型的同时激励,可实现快速、高效的损伤检测。通过扫描式激光测振仪测得结构在不同固定频率下的结构响应ODS(operational deflection shapes),利用提出的二维间隔平滑法,分析得出损伤指标。实验结果表明,二维间隔平滑法可以准确地检测碳纤维增强复合材料板的冲击损伤,并具有较好的精度。 |
| 英文摘要: |
| A new damage detection method is proposed in this paper based on vibration date of composite laminates. The original 1-D gapped smoothing method (GSM) is updated by 2-D GSM, and the standardized damage index for 2-D GSM is also presented. Comparing the proposed method with most other damage detection methods which are also based on the vibration data, this method needs only the test data of structure containing defects to determine the presence of defects and accurately locate them without requirement of baseline signal of an intact structure as contrast signal. Aiming at the spall damage due to impact in quasi-isotropic carbon fiber-reinforced composite laminate board, piezoelectric chip array combined excitation was adopted, and the multi-frequency simultaneous excitation of torsional vibration type was obtained. Then, fast and efficient damage detection is realized. Structural response ODS (operational deflection shapes) at different fixed frequencies was measured by scanning laser vibrometer (SLV) system, the damage index was obtained based on proposed 2-D GSM. Experimental results show that the impact damage in quasi-isotropic carbon fiber-reinforced composite laminate board may be correctly detected by 2-D gapped smoothing method with rather good accuracy. |
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