An Artificial Neural Network for Prediction of Front Slope Recession in Berm Breakwater

Authors

1 University of Tehran

2 Tarbiat Modares University

Abstract

Berm breakwaters are used as protective structures against the wave attack where larger quarry materials as armor stone is scarce, or large quarry materials are available but using berm breakwater lowers the costs considerably. In addition, wave overtopping in berm breakwaters are significantly lower than the traditional ones for equal crest level because of the wave energy dissipation on the berm.The most important design parameter of berm breakwaters is its seaward berm recession which has to be well estimated. In this paper a method has been developed to estimate the front slope recession of berm breakwaters using artificial neural networks with high accuracy. Four different available data-sets from four experimental tests are used to cover wide range of sea states and structural parameters. The network is trained and validated against this database of 1039 data. Comparisons is made between the ANN model and recent empirical formulae to show the preference of new ANN model.

Keywords

References

  1. Archetti, R., Lamberti, A., (1996), Parametrizzazione del profile di frangifluttiberma, Proc. Congresso AIOM, Padova.
  2. Hall, K., Kao, S., (1991), A study of the stability of dynamically stable breakwaters, Canadian Journal of Civil Engineering, Vol.18, p.916–925. [DOI:10.1139/l91-113]
  3. Haykin, S., (1994), Neural networks: a comprehensive foundation, Macmillan College Publishing Company, Inc.
  4. Lykke Andersen, T., (2006), Hydraulic Response of Rubble Mound Breakwaters (Scale Effects - Berm Breakwaters), (Doctoral Thesis) University of Aalborg, Denmark.
  5. Lykke Andersen, T., Burcharth, H.F., (2009), A new formula for front slope recession of berm breakwaters,Coastal Engineering,Vol.57 (4), p.359–374. [DOI:10.1016/j.coastaleng.2009.10.017]
  6. Moghim, M.N., (2009), Experimental study of hydraulic stability of reshaping berm breakwaters, (PhD thesis) TarbiatModares University. (In Persian)
  7. Moghim, M.N., Alizadeh, F., (2014), Hydraulic stability of reshaping berm breakwaters using the wave momentum flux parameter,Coastal Engineering,Vol.83, p.56–64. [DOI:10.1016/j.coastaleng.2013.10.008]
  8. Moghim,M.N., Shafieefar, M., Tørum, A., Chegini, V., (2011),A new formula for the sea stateand structural parameters influencing the stability of homogeneous reshaping berm breakwaters, Coastal Engineering, Vol.58 (8), p.706–721. [DOI:10.1016/j.coastaleng.2011.03.006]
  9. Motalebi, A., (2010), Experimental Study of Investigating the Influence of Armor Stone Size in Stability of Berm Breakwaters, (Master Thesis) TarbiatModares University. (In Persian)
  10. PIANC, (2003), State-of-the-Art of Designing and Constructing Berm Breakwaters, PIANC, Brussels.
  11. Sadat Hosseini, A., (2013), Presentation of a smart model to estimate the reshaped profile of berm breakwater using experimental data, (Master Thesis) TarbiatModares University. (In Persian)
  12. Shafieefar, M., Shekari, M.R, (2014), An experimental study on the parameterization of reshaped seaward profile of berm breakwaters, Coastal Engineering, Vol.91, p.123–139. [DOI:10.1016/j.coastaleng.2014.05.009]
  13. Shekari, M.R, Shafieefar, M., (2013), An experimental study on the reshaping of berm breakwaters under irregular wave attacks, Applied Ocean Research, Vol.42, p.16–23. [DOI:10.1016/j.apor.2013.03.007]
  14. Shekari, M.R., (2013), Experimental investigation of hydraulic stability of single berm and double berm breakwaters, (PhD thesis) TarbiatModares University. (In Persian)
  15. Sigurdarson, S., van der Meer, J.W., (2011), Front Slope Stability of the Icelandic-type Berm Breakwater, Proceedings of Coastal Structures 2011, ASCE.
  16. Sigurdarson, S., van der Meer, J.W., Tørum, A., Tomasicchio, R., (2008), Berm Recession of the Icelandic-type Berm Breakwater, Proc. ICCE. ASCE, Hamburg.
  17. Tørum, A., (1998),On the stability of berm breakwaters in shallow and deep water, Proc. 26th International Conference on Coastal Engineering, ASCE, Copehagen, Denmark, p.1435–1448.
  18. Tørum, A., Kuhnen, F., Menze, A., (2003), On berm breakwaters, stability, scour, overtopping,Coastal Engineering, Vol.49,p.209–238(September Issue). [DOI:10.1016/S0378-3839(03)00062-0]
  19. Van der Meer, J.W., (1992), Stability of seaward slope of berm breakwaters, Coastal Engineering, Vol.16, p.205-234. [DOI:10.1016/0378-3839(92)90037-U]
  20. Van der Meer, J.W., Sigurdarson, S., (2016), Design and Construction of Berm Breakwaters, World Scientific, Advanced Series on Ocean Engineering, Volume 40, ISBN 978-981-4749-60-2.
  21. Van Gent, M.R.A., (1995), Rock stability of rubble mound breakwaters with a berm, Coastal Engineering,Vol. 78, p. 35–45. [DOI:10.1016/j.coastaleng.2013.03.003]
  22. Van Gent, M.R.A., (1995), Wave Interaction with Permeable Coastal Structures, Delft University of Technology.
  23. Willmott, C.J., (1981), On the validation of models, Physical Geography, Vol.2, p.184–194.
  24. Willmott, C.J., Robeson, S.M., Matsuura, K., (2012), Short Communication A refined index of model performance, International Journal of Climatology, Vol.32, p.2088–2094. [DOI:10.1002/joc.2419]
International Journal Of Coastal, Offshore And Environmental Engineering(ijcoe)
Volume 3, Issue 4 - Serial Number 12
November 2018
Pages 37-44

Files

Share

How to cite

Statistics