Abstract
This paper surveys changes in the power spectrum caused by vibration signals of damaged beams under moving loads. Based on the result, parameters for structural deterioration monitoring are proposed. The beam’s damage is modeled on the visible cuts that alter the hardness of the structure. The features proposed in this article are made by changing the shape of the power spectral density (PSD) to detect structural deterioration. The experiment is designed to be similar to the actual traffic pattern across the bridge. The power spectrum is set from vibration signals received by the acceleration sensors installed along the length of the beam. The results of this paper show that changes in the shape of the power spectral density caused by damage are much more significant than changes in the essential natural frequency value of the beam structure. In other words, the use of shape changes in the power spectral density will increase the ability to detect damage in the beam-like structure.
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Acknowledgements
We acknowledge the support of time and facilities fromHo Chi Minh City University of Technology (HCMUT), VNU-HCM for this study.
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Le-Ngoc, V., Vuong-Cong, L., Pham-Bao, T., Ngo-Kieu, N. (2023). Damage Detection of the Beam Under Moving Load by Using a Variation of Power Spectrum Density. In: Rao, R.V., Khatir, S., Cuong-Le, T. (eds) Recent Advances in Structural Health Monitoring and Engineering Structures. Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-19-4835-0_17
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DOI: https://doi.org/10.1007/978-981-19-4835-0_17
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