According to the main features of the coast, by a large number of monitoring data in the typical area, Ecological dynamics model was established, then, ecosystem dynamics was simulated and reproduced for Marine Ecological System. Examples of typical coastal engineering, the main port construction effect to coastal waters ecosystem is predicted. On this basis, we developed a user-friendly, versatile set of prediction software, and it can provide a powerful tool for ecological protection of coastal waters.
By research of simple tubular joints, thin-shell element analyses have been conducted for thousands of DTK joints frequently used in offshore structures in this paper. These joints are subjected to axial load, by use of nonlinear least squares fitter, the above results are derived a new set of parametric equations, in terms of several non-dimensional geometric ratios γ, ξ, β, τ and θ with the Origin software. Separate analyses have been conducted for the difference of SCFs in DTK joints and SCFs for TK joint from empirical formulas. The SCF results of these joints could act as a good reference for both further academic studies on SCF of other complex joints and engineering designing works.
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