摘要：In this paper, the dynamic response of a long circular cylinder due to vortex
shedding is numerically investigated. The cylinder with high aspect ratio has
the structural properties typical of marine risers. The cylinder is divided
in two-dimensional sections along the riser length. The Discrete Vortex
Method (DVM) is employed for the assessment of the hydrodynamic forces acting on
these two-dimensional sections. The hydrodynamic sections are solved
independently, and the coupling among the sections is taken into account by
the solution of the structure in the time domain by the Finite Element
Method. Parallel processing is employed to improve the performance of the
method. The simulations are carried out in a cluster of Pentium IV computers
running the Linux operating system. A master-slave approach via MPI – Message
Passing Interface – is used to exploit the parallelism of the present code.
The riser sections are equally divided among the nodes of the cluster. Each
node solves the hydrodynamic sections assigned to it. The forces acting on the
sections are then passed to the master processor, which is responsible for
the calculation of the displacement of the whole structure. Scalability of
the algorithm is shown and discussed.
