Perturbation approach for damage localization in beam-type structures: analytical, experimental and numerical exposition

IF 3 Q2 ENGINEERING, CIVIL
Md. Arif Faridi, K. Roy, V. Singhal
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引用次数: 0

Abstract

ABSTRACT Structures are usually designed to undergo some yielding, cracking and damage during any catastrophic events like earthquakes. It is necessary to identify these damage locations to avoid the failure of the structure. In this study, a novel method of damage localization for a linear one-dimensional mathematical model of Euler-Bernoulli beam is developed. The damage is modeled as a normalized box-car function. The first-order perturbation in the form of a small change in the stiffness is introduced to the structure. This study employed an effective boxcar filtration technique in damage localization. The proposed formulation shows a distinct peak at the damage location. Further, a two-point roving technique is employed on the experimental model of an overhanging beam under impact loading to check the effectiveness of the proposed localization procedure under real measurement conditions. For its entirety, the finite element model for different end conditions through numerical simulations is also briefly addressed. It is observed that the results obtained from the experimental investigation and the simulation studies are in agreement with the proposed formulation. The proposed methodology does not consider the effect of noise, which can be addressed as the future scope of the present study.
梁型结构损伤局部化的摄动方法:分析、实验和数值阐述
摘要结构通常被设计为在地震等灾难性事件中发生一些屈服、开裂和损坏。有必要确定这些损坏位置,以避免结构失效。在本研究中,提出了一种新的欧拉-伯努利梁一维线性数学模型的损伤定位方法。损伤被建模为标准化的箱式汽车函数。将刚度微小变化形式的一阶摄动引入结构中。本研究采用了一种有效的棚车过滤技术进行损伤定位。所提出的公式在损伤位置显示出明显的峰值。此外,在悬臂梁在冲击载荷下的实验模型上采用两点粗纱技术,以在实际测量条件下检查所提出的定位程序的有效性。从整体上讲,还简要介绍了通过数值模拟建立的不同端部条件下的有限元模型。实验研究和模拟研究的结果与所提出的公式一致。所提出的方法没有考虑噪声的影响,这可以作为本研究的未来范围。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
3.90
自引率
9.50%
发文量
24
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