{"id":457505,"date":"2026-05-01T18:14:03","date_gmt":"2026-05-01T18:14:03","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/aqwa-naut\/"},"modified":"2026-05-06T06:10:05","modified_gmt":"2026-05-06T06:10:05","slug":"aqwa-naut","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/aqwa-naut\/","title":{"rendered":"AQWA Hydrdynamic Diffraction+AQWA NAUT"},"content":{"rendered":"<p>&lt;p&gt;&lt;p&gt;&lt;p&gt;Dear team,&lt;\/p&gt;&lt;p&gt;I&rsquo;d like to get some clarity on some of the aspects I faced while modelling in AQWA. My questions are related to (1) moon pool treatment in AQWA NAUT, (2)multiple structures with diffracting and Morison elements in the motion equation, and (3) Linear cable treatment in the Cummins formulation&lt;\/p&gt;&lt;\/p&gt;&lt;\/p&gt;<\/p>\n<ul>\n<li>&lt;li data-start=&#8221;0&#8243; data-end=&#8221;318&#8243; data-section-id=&#8221;1gxkvjh&#8221;&gt;In AQWA-NAUT time-domain simulations, when linear elastic cable moorings are used with a floating diffracting body containing a moonpool, are the mooring restoring effects incorporated directly into the global stiffness matrix &lt;span class=&#8221;katex&#8221;&gt;&lt;span class=&#8221;katex-mathml&#8221;&gt;K&lt;\/span&gt;&lt;\/span&gt;, or are they applied separately as external force terms updated at each time step?&lt;li data-start=&#8221;320&#8243; data-end=&#8221;510&#8243; data-section-id=&#8221;3nlsnw&#8221;&gt;For linear cable mooring elements in AQWA, are hydrodynamic drag and inertia forces on the mooring lines neglected by default, or can they be included within the standard Workbench setup?&lt;li data-start=&#8221;512&#8243; data-end=&#8221;814&#8243; data-section-id=&#8221;19gfiyr&#8221;&gt;In a coupled model where the main floater is represented as a diffraction body with a moonpool and the attached pipe is suspended, represented as a free-flooded pipe using Morison elements (fully submerged), how does AQWA internally assemble the Morison element inertia\/added-mass contribution into the global equation of motion?&lt;li data-start=&#8221;512&#8243; data-end=&#8221;814&#8243; data-section-id=&#8221;19gfiyr&#8221;&gt;For a floating diffracting body with an attached Morison-modelled free-flooded pip, does the added-mass matrix &lt;span class=&#8221;katex&#8221;&gt;&lt;span class=&#8221;katex-mathml&#8221;&gt;A&infin;&lt;\/span&gt;&lt;\/span&gt;&nbsp;contain only diffraction-body hydrodynamic coefficients, while Morison added mass is handled separately during time integration?&lt;li data-start=&#8221;512&#8243; data-end=&#8221;814&#8243; data-section-id=&#8221;19gfiyr&#8221;&gt;In AQWA-NAUT time-domain simulations, how is a moonpool treated when the Internal Lid (ILID) option is not specified? If the moonpool is modelled with panelled internal walls and open top\/bottom boundaries, does the standard diffraction\/radiation solution adequately capture internal water-column resonance, added mass, and damping effects, or is ILID necessary for reliable moonpool dynamics?<\/li>\n<\/ul>\n","protected":false},"template":"","class_list":["post-457505","topic","type-topic","status-publish","hentry","topic-tag-ansys-aqwa","topic-tag-aqwa","topic-tag-hydrodynamic-response","topic-tag-multiple-bodies"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27792"],"_bbp_topic_id":["457505"],"_bbp_subscription":["150512","183765"],"_bbp_author_ip":["103.21.126.81"],"_bbp_last_reply_id":["457725"],"_bbp_last_active_id":["457725"],"_bbp_last_active_time":["2026-05-06 20:13:49"],"_bbp_reply_count":["3"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["2"],"_bbp_engagement":["150512","183765"],"_btv_view_count":["111"],"_bbp_topic_status":["unanswered"],"_bbp_notification_enabled":["150512"],"_bbp_likes_count":["1"],"_edit_last":["150512"],"_bbp_revision_log":["a:2:{i:457638;a:2:{s:6:\"author\";i:150512;s:6:\"reason\";s:0:\"\";}i:457639;a:2:{s:6:\"author\";i:150512;s:6:\"reason\";s:0:\"\";}}"]},"test":"c394bd69a3d04c280f66663ea12cfd2e9a08f8f7"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/457505","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":2,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/457505\/revisions"}],"predecessor-version":[{"id":457639,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/457505\/revisions\/457639"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=457505"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}