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首页> 外文期刊>International journal of steel structures >Crack identification method for tapered cantilever pipe-type beam using natural frequencies
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Crack identification method for tapered cantilever pipe-type beam using natural frequencies

机译:固有频率的锥形悬臂管形梁裂纹识别方法

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摘要

A method to detect location and size of a crack in tapered cantilever pipe-type beam using changes in natural frequencies is presented. The boundary conditions of cantilever beam are applied to a general solution for vibrating tapered beam. Then, an equivalent bending stiffness for cracked beam is used to obtain the natural frequencies. Numerical simulations are carried out to construct a set of training patterns of a neural network, and committee of neural networks is employed to identify the crack. Crack identifications are carried out for the 16 damage cases numerically and for the 3 damage cases experimentally. The identified crack locations and sizes agree reasonably well with the exact values.
机译:提出了一种利用固有频率变化检测锥形悬臂管形梁中裂纹位置和大小的方法。悬臂梁的边界条件被应用于振动锥形梁的一般解决方案。然后,使用等效的弯曲梁抗弯刚度来获得固有频率。进行数值模拟以构造一组神经网络的训练模式,并使用神经网络委员会来识别裂纹。在数值上对16个损坏情况进行了裂纹识别,在实验中对3个损坏情况进行了裂纹识别。所确定的裂纹位置和大小与精确值相当吻合。

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