This study aimed to investigate the behaviour of coupled transient acoustic and structural waves travelling within an L-shaped, statically pressurised, water filled pipe system consisting of two pipe straights separated by a pipe bend. Specifically, theoretical models were utilised to predict the time domain response of the system subject to a single, impulse-like excitation applied to a boundary modelled as an end cap. Two models of the bend were used: one utilised a simple discrete model and the other a more complicated continuous model. Moreover, an experimental rig was designed and built to test the theory. The designed ring frequency and ratio of bend radius to pipe radius were respectively 24 kHz and 4.4. The results show that for a broad impulse consisting of significant frequencies up to I kHz, the discrete bend model is superior to the continuous model due to computational efficiency.
|Publication status||Published - 2008|