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总览 评价 党晓娟 1,* , 杨智春 2, , 谭光辉 2, , 王乐 2, ( 1、 西北工业大学; 2、 西北工业大学航空学院航空结构工程系; ) 摘要: 针对复合材料层合板的分层损伤,提出了一种基于互相关函数幅值向量的损伤统计检测方法。首先建立了复合材料层合
党晓娟1,*, 杨智春2,, 谭光辉2,, 王乐2,
(
1、西北工业大学; 2、西北工业大学航空学院航空结构工程系; )
摘要:
针对复合材料层合板的分层损伤,提出了一种基于互相关函数幅值向量的损伤统计检测方法。首先建立了复合材料层合板有限元模型并模拟其局部的分层损伤,求得随机激励下结构的加速度响应信号,然后,以结构的多个结点为参考点,计算结构损伤前后的CorV,利用互相关函数幅值向量置信度准则(Correlation function amplitude Vector Assurance Criterion,CVAC)来度量其变化程度,以此来识别损伤并根据结构CorV损伤前后的相对变化来确定产生分层损伤的区域,结合统计学原理最终确定损伤位置。通过对不同位置处的单损伤和多损伤检测仿真算例以及抗噪能力检验,验证了本文提出的损伤统计检测方法的有效性和稳定性。
关键词:
损伤检测;复合材料层合板;互相关函数幅值向量;统计检测
Dang Xiaojuan1,*, Yang Zhichun2,, Tan Guanghui2,, Wang Le2,
(
1、Northwestern Polytechnical University; 2、School of Aeronautics, Northwestern Polytechnical University; )
Abstract:
A statistic strategy based on the Correlation function amplitude Vector (CorV) is proposed to detect local delamination damage of a composite laminate. In the numerical simulation ,the cantilevered composite laminate is excited by a steady random excitation, and its finite element model is established to get the vibration responses of the intact and damaged laminate. In the damage detecting scheme, the CorVs of the intact and damaged laminate are calculated by the acceleration responses respectively using several nodes as the reference points. Then the Correlation function amplitude Vector Assurance Criterion (CVAC) is adopted to quantify the damage extent. And the relative changes between the CorVs of the intact and damaged laminate are used together with a statistic evaluation formula to determine the damage location. The effectiveness and robustness of the proposed statistic detection approach are verified by the detection examples for single damage and multiple damages. The anti-noise ability of this method is also demonstrated.
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