{"id":395796,"date":"2024-11-29T16:00:14","date_gmt":"2024-11-29T16:00:14","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/aqwa-reference-point-for-hydrodynamics-in-presence-of-fluid-tanks\/"},"modified":"2024-11-29T16:00:14","modified_gmt":"2024-11-29T16:00:14","slug":"aqwa-reference-point-for-hydrodynamics-in-presence-of-fluid-tanks","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/aqwa-reference-point-for-hydrodynamics-in-presence-of-fluid-tanks\/","title":{"rendered":"AQWA &#8211; Reference point for hydrodynamics in presence of fluid tanks"},"content":{"rendered":"<p>&lt;p&gt;Hello,&lt;\/p&gt;&lt;p&gt;I have a question regarding the modelling in presence of internal fluid tanks in AQWA&#8230;&lt;\/p&gt;&lt;p&gt;When there are only solid masses, my understanding is that the reference point for hydrodynamics (addedd masses, damping, generalized forces) is the global centre of gravity (please correct me if I&#8217;m wrong).&lt;\/p&gt;&lt;p&gt;However, in case there are fluid tanks in the model, I could not find specific information on which point is used as reference.&nbsp;&lt;\/p&gt;&lt;p&gt;The Hydrostatic summary reports information on the position of the &#8220;Structure Center of Gravty (CoG)&#8221; (only solid masses) and of the &#8220;Combined Center of Gravty (CoG)&#8221; (fluids + solid masses).&nbsp;&lt;\/p&gt;&lt;p&gt;Which one, if any, of the two is used as reference? The &#8220;Combined&#8221; one?&lt;\/p&gt;&lt;p&gt;If none of the two is used, then which point is used?&lt;\/p&gt;&lt;p&gt;Thanks,&lt;\/p&gt;&lt;p&gt;Gabriele&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-395796","topic","type-topic","status-publish","hentry","topic-tag-aqwa","topic-tag-hydrodynamic","topic-tag-reference-frame"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27792"],"_bbp_topic_id":["395796"],"_bbp_subscription":["475604","180344"],"_bbp_author_ip":["140.105.135.106"],"_bbp_reply_count":["3"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["2"],"_bbp_engagement":["475604","180344"],"_btv_view_count":["211"],"_bbp_topic_status":["unanswered"],"_bbp_last_reply_id":["395981"],"_bbp_last_active_id":["395981"],"_bbp_last_active_time":["2024-12-02 15:35:05"]},"test":"c89a095867bc5ebc0dafec7886d9c2926dd5928c"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/395796","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/395796\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=395796"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}