Damage Detection of the Beam Under Moving Load by Using a Variation of Power Spectrum Density

Le-Ngoc, Vien; Vuong-Cong, Luan; Pham-Bao, Toan; Ngo-Kieu, Nhi

doi:10.1007/978-981-19-4835-0_17

Cited by 2 publications

(3 citation statements)

References 13 publications

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“…The power spectrum density of the wireless communication system is graphically shown in the chart for easy understanding [9]. Specifically, it demonstrates that the spectral density of the WCS degrades with increasing frequency, with the system performing best at lower frequencies like 2.4 GHz and 5 GHz as opposed to higher frequencies like 8 GHz.…”

Section: Fig 3 Power Spectral Density Of the Wireless Communication S...mentioning

confidence: 99%

Impact of Antenna Design, Electromagnetic Propagation, and RF Frequency on the Performance of Wireless Communication Systems in Urban Environments

Wang

Zeng

2023

JCNS

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The design and optimization of antennas, electromagnetic propagation, radio frequency (RF), and channel characterization are vital to the performance of the system in the rapidly developing area of wireless communication. Antennas are electronic components that transform electrical currents into electromagnetic waves and vice versa. They are critical to the operation of any wireless network and their design and optimization are therefore of paramount importance. The goal of this research was to find out how different factors, like antenna type, electromagnetic environment, RF, and channel characteristics, affect the efficiency of a wireless network. Multipath fading of 8 dB, shadow fading of 3 dB, and path loss of 100 dB were used in the study with a microstrip antenna in a suburban propagation scenario at an RF frequency of 5 GHz. Antenna design, electromagnetic propagation scenario, radio frequency (RF), and channel characteristics were all shown to have an impact on the wireless communication system performance. The performance metrics of the wireless sensor network were almost, but not quite, those that were hoped for in a real-world setting. Several avenues for future study are suggested, and the results have important implications for the design and optimization of wireless communication systems.

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Section: Fig 3 Power Spectral Density Of the Wireless Communication S...mentioning

confidence: 99%

Impact of Antenna Design, Electromagnetic Propagation, and RF Frequency on the Performance of Wireless Communication Systems in Urban Environments

Wang

Zeng

2023

JCNS

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“…By modifying the Power Spectral Density (PSD) configuration, the features stated by Le-Ngoc et al [9] were modified by Le-Ngoc and his team to indicate structural degradation. The researchers noted alterations in the power spectrum resulting from the vibrations of beams that had experienced structural damage as a result of moving loads.…”

Section: Introductionmentioning

confidence: 99%

“…These findings have led to the proposal of monitoring measures for the detection of structural deterioration. In addition, Le-Ngoc and his team reasoned that employing PSD shape changes will improve the capability to discover the damage in beam-like structures, a long, slender construction used for support and load distribution [9]. In the study of Peng and Yang [5], a static shear energy approach was introduced for inspecting destruction in beam-like structures and identifying the specific locations of the damage.…”

Section: Introductionmentioning

confidence: 99%

Damage Identification in Reinforced Concrete Beams Using Wavelet Transform of Modal Excitation Responses

Soleymani,

Jahangir,

Rashidi

et al. 2023

Buildings

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This study focuses on identifying damage in reinforced concrete (RC) beams using time-domain modal testing and wavelet analysis. A numerical model of an RC beam was used to generate various damage scenarios with different severities and locations. Acceleration time histories were recorded for both damaged and undamaged structures. Two damage indices, DI_MW and DI_SW, derived from the wavelet analysis, were employed to determine the location and severity of the damage. The results showed that different wavelet families and specific mother wavelets had varying effectiveness in detecting damage. The Daubechies wavelet family (db2, db6, and db9) detected damage at the center and sides of the RC beams due to good time and frequency localization. The Biorthogonal wavelet family (bior2.8 and bior3.1) provided improved time–frequency resolution. The Symlets wavelet family (sym2 and sym7) offered a balanced trade-off between time and frequency localization. The Shannon wavelet family (shan1-0.5 and shan1-0.1) exhibited good time localization, while the Frequency B-Spline wavelet family (fbsp2-1-0.1) excelled in frequency localization. Certain combinations of mother wavelets, such as shan1-0.5 with the DI_SW index, were highly effective in detecting damage. The DI_SW index outperformed DI_MW across different numerical models. Selecting appropriate wavelet analysis techniques, particularly utilizing shan1-0.5 in the DI_SW, proved effective for detecting damage in RC beams.

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Damage Detection of the Beam Under Moving Load by Using a Variation of Power Spectrum Density

Cited by 2 publications

References 13 publications

Impact of Antenna Design, Electromagnetic Propagation, and RF Frequency on the Performance of Wireless Communication Systems in Urban Environments

Impact of Antenna Design, Electromagnetic Propagation, and RF Frequency on the Performance of Wireless Communication Systems in Urban Environments

Damage Identification in Reinforced Concrete Beams Using Wavelet Transform of Modal Excitation Responses

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