HUANG L X, YANG S Z, LIANG F A,et al.Study on damage identification of functionally graded Timoshenko beam based on the fusion of modal strain and frequency[J].Journal of Henan Polytechnic University(Natural Science) ,2023,42(1):168-174.

doi:10.16186/j.cnki.1673-9787.2021010122

Received:2021/01/25

Revised:2021/05/17

Published:2023/01/25

Study on damage identification of functionally graded Timoshenko beam based on the fusion of modal strain and frequency

HUANG Lixin1,2, YANG Shaozhao1, LIANG Fuan1, HUANG Jun1

1.School of Civil Engineering and Architecture，Guangxi University，Nanning 530004，Guangxi，China；2.The Key Laboratory of Disaster Prevention and Structural Safety of the Education Ministry，Guangxi University，Nanning 530004，Guangxi，China

Abstract:Based on the fusion of modal strain energy and natural frequency，a new damage identification method of functionally graded（FG）Timoshenko beam was proposed in this paper.The finite element calculation scheme was given by way of the theory of FG Timoshenko beam and on this basis the natural frequency and shape modal parameters were calculated.The formula of the modal frequency strain energy was constructed after modal strain energy fusing with natural frequency.Based on the change rate of elemental modal frequency strain energy，the damage identification index of FG Timoshenko beam was defined.Numerical examples indicated that the damage identification method fusing modal strain energy with natural frequency could effectively identify damage elements and had good anti-noise performance.

Key words:functionally graded Timoshenko beam;modal frequency strain energy;damage identification;finite element method

 基于模态应变能与频率融合方法的功能梯度铁木辛柯梁损伤识别研究_黄立新.pdf