A novel damage index extracted from frequency response of cracked Timoshenko beam subjected to moving harmonic load
In this paper, there is proposed a novel damage index extracted from frequency response of cracked Timoshenko beam under moving harmonic load using the so-called Modal Assurance Criterion (MAC) concept. First, frequency response of a cracked Timoshenko beam subjected to harmonic force moving on the...
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| Format: | Article |
| Language: | English |
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Publishing House for Science and Technology
2022-09-01
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| Series: | Vietnam Journal of Mechanics |
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| Online Access: | https://vjs.ac.vn/index.php/vjmech/article/view/17546 |
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| _version_ | 1850044275400638464 |
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| author | Nguyen Tien Khiem Phi Thi Hang |
| author_facet | Nguyen Tien Khiem Phi Thi Hang |
| author_sort | Nguyen Tien Khiem |
| collection | DOAJ |
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In this paper, there is proposed a novel damage index extracted from frequency response of cracked Timoshenko beam under moving harmonic load using the so-called Modal Assurance Criterion (MAC) concept. First, frequency response of a cracked Timoshenko beam subjected to harmonic force moving on the beam with constant speed is obtained in an analytical expression. Then, a scalar characteristic like the coherence between the frequency responses of intact and cracked beams is determined and called herein Spectral Assurance Criterion (SAC). Such designed criterion is dependent upon crack parameters (location and depth), the load frequency and speed as well as position on beam where the responses have been measured. Numerical analysis shows that SAC is much more sensitive to crack than natural frequencies and can be used as a novel damage index for crack detection in beam using moving load. The effect of moving load frequency and speed has been also examined with the aim to have got an indicator most adequate for the crack detection problem.
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| format | Article |
| id | doaj-art-6746a47ca5764c44b232445b8eb6aed3 |
| institution | DOAJ |
| issn | 0866-7136 2815-5882 |
| language | English |
| publishDate | 2022-09-01 |
| publisher | Publishing House for Science and Technology |
| record_format | Article |
| series | Vietnam Journal of Mechanics |
| spelling | doaj-art-6746a47ca5764c44b232445b8eb6aed32025-08-20T02:55:01ZengPublishing House for Science and TechnologyVietnam Journal of Mechanics0866-71362815-58822022-09-0144310.15625/0866-7136/17546A novel damage index extracted from frequency response of cracked Timoshenko beam subjected to moving harmonic loadNguyen Tien Khiem0https://orcid.org/0000-0001-5195-2704Phi Thi Hang1Institute of Mechanics, Vietnam Academy of Science and Technology, Hanoi, VietnamElectric Power University, Hanoi, Vietnam In this paper, there is proposed a novel damage index extracted from frequency response of cracked Timoshenko beam under moving harmonic load using the so-called Modal Assurance Criterion (MAC) concept. First, frequency response of a cracked Timoshenko beam subjected to harmonic force moving on the beam with constant speed is obtained in an analytical expression. Then, a scalar characteristic like the coherence between the frequency responses of intact and cracked beams is determined and called herein Spectral Assurance Criterion (SAC). Such designed criterion is dependent upon crack parameters (location and depth), the load frequency and speed as well as position on beam where the responses have been measured. Numerical analysis shows that SAC is much more sensitive to crack than natural frequencies and can be used as a novel damage index for crack detection in beam using moving load. The effect of moving load frequency and speed has been also examined with the aim to have got an indicator most adequate for the crack detection problem. https://vjs.ac.vn/index.php/vjmech/article/view/17546cracked beamsmoving loadfrequency responsedamage index |
| spellingShingle | Nguyen Tien Khiem Phi Thi Hang A novel damage index extracted from frequency response of cracked Timoshenko beam subjected to moving harmonic load Vietnam Journal of Mechanics cracked beams moving load frequency response damage index |
| title | A novel damage index extracted from frequency response of cracked Timoshenko beam subjected to moving harmonic load |
| title_full | A novel damage index extracted from frequency response of cracked Timoshenko beam subjected to moving harmonic load |
| title_fullStr | A novel damage index extracted from frequency response of cracked Timoshenko beam subjected to moving harmonic load |
| title_full_unstemmed | A novel damage index extracted from frequency response of cracked Timoshenko beam subjected to moving harmonic load |
| title_short | A novel damage index extracted from frequency response of cracked Timoshenko beam subjected to moving harmonic load |
| title_sort | novel damage index extracted from frequency response of cracked timoshenko beam subjected to moving harmonic load |
| topic | cracked beams moving load frequency response damage index |
| url | https://vjs.ac.vn/index.php/vjmech/article/view/17546 |
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