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A multiple-Damage Location Assurance Criterion Based on Natural Frequency Changes

机译:基于自然频率变化的多损伤位置保证准则

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摘要

A new method for locating multiple damage sites in elastic structures is introduced. It uses only the natural frequencies for diagnosis and obviates the need to have complete experimental mode shapes. Results from three damaged structures are presented. A 2-bar truss illustrates the basis for the method, a 15-bar truss shows its use with symmetrical structures, and a redundant-bar truss is used to compare the new method with that of Pandey and Biswas. Correct predictions of the location and relative amounts of damage at multiple sites are obtained, even when low damage levels are present in the structure.
机译:介绍了一种在弹性结构中定位多个损伤部位的新方法。它仅使用固有频率进行诊断,而无需具有完整的实验模式形状。给出了三个受损结构的结果。 2根桁架说明了该方法的基础,15根桁架说明了其在对称结构中的使用,并使用了一根冗余的桁架将新方法与Pandey和Biswas进行了比较。即使结构中的损坏程度较低,也可以正确预测多个位置的损坏位置和相对量。

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