{"id":347069,"date":"2024-01-29T16:24:02","date_gmt":"2024-01-29T16:24:02","guid":{"rendered":"\/forum\/forums\/reply\/347069\/"},"modified":"2024-01-29T16:24:02","modified_gmt":"2024-01-29T16:24:02","slug":"347069","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/347069\/","title":{"rendered":"Reply To: How to Analyze Motion Response of Floating Structure With Coupled (2 DOF)?"},"content":{"rendered":"<p>&lt;p&gt;Both Hydrodynamic Diffraction and Hydrodynamic Reponse solve the coupled motions simutantaneously.&lt;\/p&gt;&lt;p&gt;In Hydrodynamic Diffraction, the structure mass matrix, hydrostatic stiffness matrix, added mass matrix and hydrodynamic dmaping for a single structure are of 6&#215;6 matrix form, the off-diagonal elements may not be zero, so that the motions, such as heave and pitch, are couplied.&nbsp; If several structures (n structures for example) are in a hydrodynamic interaction group, the added mass matrix and hydrodynamic dmaping matrix are of 6nx6n matrix form, all the rigid motions of all the structures in this group will be couplied.&nbsp; The above figure shows the RAOs of the heave and pitch motions, these motions are normally coupled through the motion equations in the frequency domain.&lt;\/p&gt;&lt;p&gt;In the Hydrodynamic&nbsp; Response analysis, the matrices of the added mass\/hydrodynamic damping for a hydrodynamic interaction group of n structures are of 6nx6n matrix form, together with the moorings and joints defined between structures,&nbsp; all the motions of the structures in the model may be coupled.&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-347069","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"acf":[],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies\/347069","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/reply"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies\/347069\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=347069"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}