结构损伤的一种两阶段诊断方法

TWO-STAGE APPROACH FOR STRUCTURAL DAMAGE DIAGNOSIS USING INCOMPLETE MODAL PARAMETERS

提出一种结构损伤诊断的两阶段方法。利用不完整的模态测量数据,首先采用最佳逼近特征向量法,预先评估可能的损伤区域,然后使用频率灵敏度法求解损伤程度。以平面桁架结构为例验证该方法,结果表明,文中所提方法是可行的。

A two-stage approach for structural damage detection is presented by directly using incomplete modal parameters. The first stage is to locate the suspected damaged elements by using the best achievable eigenvector method. The second stage is to quantify damages with the help of the first-order sensitivity of the structural natural frequencies. A numerical simtdation case of a plane truss structure is given to verify the proposed method. Results show that the proposed method performs well and can be used in engineering practice.