Modelling Behaviour of Porous Wave Filters

Land, Kirsten (2002). Modelling Behaviour of Porous Wave Filters Honours Thesis, School of Engineering, The University of Queensland.

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Author Land, Kirsten
Thesis Title Modelling Behaviour of Porous Wave Filters
School, Centre or Institute School of Engineering
Institution The University of Queensland
Publication date 2002
Thesis type Honours Thesis
Supervisor Tom Baldock
Total pages 29
Language eng
Subjects 0905 Civil Engineering
Formatted abstract
The following thesis investigates the behaviour of porous filters on the transmission of wave energy. Most prominently researched was the possibility of dissipating 75 % of short waves while still allowing all long waves to pass through untouched. Reflection caused by the filters was also tested, primarily to attempt to keep reflections down to a minimal 30 %. The experiments proved unsuccessful in all three tests at one time.

Testing was completed in the Department’s wave flume were wave gauges were used to measure both the incident and transmitted wave shapes. The filter was constructed out of hexagonal mesh chicken wire rolled into eight feet long rolls. Six rows were tested with a total of 56 rolls being used. Ten predetermined frequencies were tested for each row, with both transmission and reflection data being recorded.

Once all tests were completed it was determined that the energy transmission of waves is related to both porosity of the filters used as well as the frequency of the waves and the impact of the reflected waves, if any. From this it was possible to see a linear type relationship developing between transmission coefficients and filter porosity. Further tests are advised to allow fewer factors of inaccuracy.

Keyword Porous Wave Filters

Document type: Thesis
Collection: UQ Theses (non-RHD) - UQ staff and students only
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Created: Thu, 27 Nov 2014, 13:55:11 EST by Asma Asrar Qureshi on behalf of Scholarly Communication and Digitisation Service