132 research outputs found
The new ISO 19011 standard for management system auditing". Journal of commodity science, 2003, 42(I),43
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Integral formulation for losses computation in tripolar submarine cables with shield wires, moisture barriers and armor
No full textMethod–of–Moments (MoM) is coupled with PEEC in order to compute Joule and hystheresis losses in the armor, shields and moisture barriers of a submarine tripolar cable. The large size and complex structure of the linear algebraic system resulting from the problem discretization demands for a suitably tailored solver. We describe a block–Gauß–Seidel preconditioner for Krylov subspace methods that allows for a matrix–free solver implementation, resulting in a dramatic reduction of computation time and memory requirements w.r.t. other brute–force modeling approaches
Losses Computation in Double Armored AC Submarine Cables
No full textAn integral equation formulation already developed by the authors is applied to a conductive geometry characterized by three helically twisted structures. In particular, a suitable geometrical approximation is used for the computation of power losses in double armored AC submarine cables. The proposed approach is validated with FEM simulations
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