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Damage Identification of Space Truss Structure Based on Strain Modal and wavelet Transform

机译：基于应变模态和小波变换的空间桁架结构损伤识别

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摘要

Based on the characteristics of space truss structures, the concept of modal strain energy is introduced and square difference in elemental modal strain is presented. Through the square difference in elemental modal strain and wavelet transform, this paper presents a method for space truss structure damage recognition. The structural damage index is presented with the change of wavelet coefficients. Numerical simulation results show that: this method is effective to locate the single, multiple damages and light, severe damage with the first mode information. The preliminary tries for damage extent identification were made by the wavelet coefficients.
机译：基于空间桁架结构的特点，引入了模态应变能的概念，提出了元素模态应变的平方差。通过元素模态应变和小波变换的平方差，本文介绍了一种空间桁架结构损伤识别的方法。通过对小波系数的变化提出了结构损伤指数。数值模拟结果表明：该方法有效地定位单个，多重损坏和光线，对第一模式信息的严重损坏。小波系数制造损伤程度识别的初步试验。

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