A discrete-module-finite-element hydroelasticity method in analyzing dynamic response of floating flexible structures

A discrete-module-finite element (DMFE) based hydroelasticity method has been proposed and well developed. Firstly, a freely floating flexible structure is discretized into several macro-submodules in two horizontal directions to perform multi-rigid-body hydrodynamic analysis. Each macro-submodule then abstracted lumped mass at the center of gravity that bears external forces including inertia force, force hydrostatic force. Apart from forces, all masses are also subjected structural reflect deformation features original structure. The key calculating derivation equivalent overall stiffness matrix with respect displacements masses, which tackled following finite procedure. More specifically, each number microelements derive corresponding matrix, manipulated new one only nodes position surrounding boundaries by using substructure approach, subsequently target obtained combining together macro-submodules. Finally, on equivalence between DMFE establishes hydroelastic equation their as unknown variables. Solving gives displacement response masses. Displacement responses first calculated interfaces every adjacent macro-submodules, after any given structure, recovery uses spline interpolation scheme.