基于轴向模态应变能比法的三维桁架结构损伤定位方法

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振动与冲击 ›› 2013, Vol. 32 ›› Issue (12) : 169-173.

论文

基于轴向模态应变能比法的三维桁架结构损伤定位方法

冯坤1，杨永春 2 ,郑轶3

作者信息 +

Damage detection method of three-dimensional truss structure based on the axial modal strain energy ratio

Feng Kun1 Yang Yongchun2 Zheng Yi3

Author information +

文章历史 +

摘要

本文提出了可用于诊断三维桁架结构的损伤指标——轴向模态应变能比法。该指标仅利用结构的前两阶模态参数，无需转动自由度信息。通过四腿导管架海洋平台结构有限元模型，数值模拟不同构件的多种损伤工况对该指标进行验证，最后通过海洋平台物理模型实验对该方法进行了实验验证。验证结果表明本文提出的轴向模态应变能比法可有效地诊断三维桁架结构的损伤。

Abstract

An improved crack inspection method based on the axial modal strain energy ratio was presented for identifying a crack in the three-dimensional truss structure. The improved method is used to predict the existence and the approximate location of the crack by using only the first two order modal parameters without the rotational freedom degree information. With the crack cases varied, the finite element model jacket platform and the broken link case of physical model will be analysis. The final results show that the proposed axial modal strain energy ratio method can effectively diagnose the three-dimensional truss structure damage.

导出引用

冯坤;杨永春 ;郑轶. 基于轴向模态应变能比法的三维桁架结构损伤定位方法[J]. 振动与冲击, 2013, 32(12): 169-173

Feng Kun Yang Yongchun Zheng Yi. Damage detection method of three-dimensional truss structure based on the axial modal strain energy ratio [J]. Journal of Vibration and Shock, 2013, 32(12): 169-173