Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Application of stress wave propagation technique for condition assessment of timber poles
The stress wave propagation technique can be effectively used to assess the condition of timber utility poles. However, reliable detection of damage based on the reflected wave within the time domain is not always possible. Therefore, various signal processing methods such as frequency-domain analysis and time-frequency analysis can be adopted to overcome this problem depending on the application. In this paper, Hilbert–Huang and continuous wavelet transforms are selected as signal processing methods to analyse the reflected wave. The signal is initially subjected to an empirical mode decomposition process prior to the computation of instantaneous frequencies of the decomposed signals using the Hilbert–Huang transformation. The anomalies in the instantaneous frequency plots can be used to identify any damage and its location along the pole. Additionally, the decomposed signals are subjected to a wavelet transformation to further confirm the existence of damage. The combined Hilbert–Huang and continuous wavelet transform technique is applied to the stress wave signal recorded from the in-service poles to assess the accuracy of the proposed method. This method increases the confidence level of defect identification of timber utility poles.
Application of stress wave propagation technique for condition assessment of timber poles
The stress wave propagation technique can be effectively used to assess the condition of timber utility poles. However, reliable detection of damage based on the reflected wave within the time domain is not always possible. Therefore, various signal processing methods such as frequency-domain analysis and time-frequency analysis can be adopted to overcome this problem depending on the application. In this paper, Hilbert–Huang and continuous wavelet transforms are selected as signal processing methods to analyse the reflected wave. The signal is initially subjected to an empirical mode decomposition process prior to the computation of instantaneous frequencies of the decomposed signals using the Hilbert–Huang transformation. The anomalies in the instantaneous frequency plots can be used to identify any damage and its location along the pole. Additionally, the decomposed signals are subjected to a wavelet transformation to further confirm the existence of damage. The combined Hilbert–Huang and continuous wavelet transform technique is applied to the stress wave signal recorded from the in-service poles to assess the accuracy of the proposed method. This method increases the confidence level of defect identification of timber utility poles.
Application of stress wave propagation technique for condition assessment of timber poles
Mudiyanselage, Sahan (Autor:in) / Rajeev, Pathmanathan (Autor:in) / Gad, Emad (Autor:in) / Sriskantharajah, Baraneedaran (Autor:in) / Flatley, Ian (Autor:in)
Structure and Infrastructure Engineering ; 15 ; 1234-1246
02.09.2019
13 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Non-destructive Techniques for Condition Assessment of Timber Utility Poles
| Springer Verlag | 2019
Condition Assessment of Installed Timber Piles by Dispersive Wave Propagation
| British Library Online Contents | 1996
Condition Assessment of Installed Timber Piles by Dispersive Wave Propagation
| British Library Conference Proceedings | 1996