基于约束最小二乘法的剪切型框架结构损伤识别新方法

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振动与冲击 ›› 2016, Vol. 35 ›› Issue (20) : 119-124.

论文

罗钧1，刘纲1,2，黄宗明1,2

作者信息 +

Damage Detection for Shear Frame Structure Based on the Constrained Least Square Method

Luo Jun 1，Liu Gang 1,2，Huang Zong-ming 1,2

Author information +

文章历史 +

摘要

针对现有基于模态驱动的损伤识别方法在定位和定量方面的不足，提出了一种适用于剪切型框架结构的损伤识别算法。根据结构动力学特征方程，推导了剪切型结构的单元损伤系数方程，建立起单元损伤系数与损伤前后结构模态参数之间的关系；根据剪切型结构的单元损伤系数方程和约束线性最小二乘法，提出了一种适用于剪切型框架结构的损伤识别新指标，可以利用较少的模态阶次直接进行损伤的定位和定量识别。最后利用一个6自由度数值模型和试验室3层框架试验验证算法的有效性。

Abstract

In view of the existing damage detection method in identifying the damage location and degree of the insufficiency, which based on the modal driven, this article proposed a new damage detection approach that allows for the damage localization and quantitative identification in a shear frame structure. Based on the structural dynamic characteristic equation, the damage coefficient equation of shear structure was deduced, and then the relationship between the damage coefficient and the structural modal parameters before and after damage was established. Based on the damage coefficient equation and constraint linear least square method, this article proposed a new damage identification index for shear frame structure, which allows for the damage localization and quantitative identification in a shear frame structure using a small modal parameters. Finally a simulated model and a lab-scale frame structure were conducted to verify the validity of the algorithm.

导出引用

罗钧1，刘纲1,2，黄宗明1,2. 基于约束最小二乘法的剪切型框架结构损伤识别新方法[J]. 振动与冲击, 2016, 35(20): 119-124

Luo Jun 1，Liu Gang 1,2，Huang Zong-ming 1,2. Damage Detection for Shear Frame Structure Based on the Constrained Least Square Method[J]. Journal of Vibration and Shock, 2016, 35(20): 119-124

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