Power Spectral Density of Defect Beams Under a Moving Load

Nguyen, Thanh Q.

doi:10.1007/s40996-021-00762-0

Cited by 3 publications

(1 citation statement)

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“…The Fourier series coefficients define the amplitudes of the sine and cosine terms, each with its own frequency. A strategy for decomposing a recorded dynamic signal into its amplitude and frequency components has recently been presented in Nguyen 22 and Ngo et al 23 The dynamic portion of a signal of an arbitrary period T can be described in equation ( 1)…”

Section: Fourier Transform and Frequency Spectrummentioning

confidence: 99%

PSD characteristics for the random vibration signals used in bridge structural health monitoring in Vietnam based on a multi-sensor system

Nguyen

2022

International Journal of Distributed Sensor Networks

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This study proposes two parameters, including the appearance frequency of harmonics (AFH) and the change in shape of the power spectral density (PSD), which are examined to assess the decline in stiffness of a bridge span. PSDs are obtained from the real vibration signals of the randomized traffic load model based on accelerometer multi-sensors that indicate the change in mechanical behavior of the structure over time. In addition, AFHs evaluate the workability of the structure. With these parameters in mind, actual vibrations in real beam structures are studied with the aim of using structural health monitoring to assess the bearing capacity reduction on Saigon Bridge’s spans. The results show that AFHs and the high-frequency regions relate to the decreased stiffness of the bridge’s spans over a given period of time. In the future, this research can be used to monitor structural health for various types of structure materials and many different bridge spans.

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Section: Fourier Transform and Frequency Spectrummentioning

confidence: 99%