Showing 2 results for Shore
N. Talebbeydokhti and M. Nikmanesh,
Volume 20, Issue 2 (4-2001)
Abstract
In this paper, longshore sediment transport in littoral zones is investigated. For investigation of sediment transport in the nearshore zone, the effects of waves, currents and topographical conditions of coast are considered. Linear wave theory was used for the investigation of the wave behaviour. Governing equations of littoral current are continuity and momentum ones. For calculating concentraion profile of suspended sediments at depth, the convection-diffusion equations must be solved.
A computer program called “PLSTP” (Prediction of Sediment Transpornt in Littoral Zones) is developed for investigation of sediment transport process in littoral zones. The finite difference method is used for solving governing equations. The results show a good agreement between this model and the measurements available.
Keywords: Littoral transport, Wave, Shore, current, sediment transport
A. Fathi, A. A. Aghakuchak, and Gh. A. Montazer,
Volume 26, Issue 2 (1-2008)
Abstract
In welded tubular joints, when the fatigue crack depth is less than 20% of chord wall thickness, the crack growing process is highly affected by weld geometry.
Hence, T-butt solution and weld magnification factor (Mk) are applicable tools for evaluating the crack growth rate in this domain. In this research, the capability of Artificial Neural Network (ANN) for estimating the Mk of weld toe cracks in T-butt joints is investigated. Four Multi-Layer Perceptron (MLP) networks are designed and trained to predict the Mk in deepest point and ends of weld toe cracks under membrane and bending stresses. Training and testing data of networks are extracted from a reputable resource on finite element modeling. Comparison of the results obtained and those from the most recently published equations shows that using ANN seems to be very beneficial in this field
