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一种基于频率变化和遗传算法的梁式结构损伤识别方法

DOI: 10.3969/j.issn.1674-0696.2014.04.02, PP. 7-11

Keywords: 桥梁工程,简支梁,频率变化,损伤识别,裂缝,遗传算法,bridgeengineering,simplysupportedbeam,frequencyvariation,damageidentification,crack,geneticalgorithm

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Abstract:

:?提出了一种含裂缝简支梁式结构的损伤识别方法。以一个变刚度的弯曲弹簧模拟损伤截面从而建立含裂缝的简支梁自由振动方程并进行求解,基于频率变化建立优化问题并采用遗传算法进行求解。对一个数值算例进行了研究,结果表明:在不考虑随机误差时,可以精确识别裂缝位置和深度;考虑随机误差时,裂缝深度较大时仍可准确识别损伤,裂缝深度较小时识别方法失效。

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