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中文摘要：
提出一种基于振动模态柔度曲率指数和突变指数的损伤识别方法,利用温度在结构内部连续平缓的分布特性,通过对柔度曲率进行二阶差分求导消除环境温度变化对损伤识别结果的影响,并基于协整理论给出所提方法的物理解释。最后,结合一个简支梁算例验证所提方法的有效性,利用连续监测数据对上述指标多次统计平均处理来提高抗噪性。
英文摘要：
A novel detection approach using curvature index of modal flexibility curvature and its curvature damage diagnosis index is proposed in this paper.The proposed method is based on the unique character of temperature propagation and distribution in structure;the temperature disturbance can be eliminated by differentiating a second time for flexibility curvature.A physical interpretation is demonstrated for the proposed method based on cointegration theory.The validity and effectiveness of the proposed method are illustrated through a simple supported beam simulation,and a statistical averaging technique is utilized to improve the noise resistance of these damage indexes.Thus,the proposed method has the potential to be implemented in practical applications.
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