{"id":373370,"date":"2024-07-24T08:29:20","date_gmt":"2024-07-24T08:29:20","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/?post_type=topic&#038;p=373370"},"modified":"2024-07-24T08:29:20","modified_gmt":"2024-07-24T08:29:20","slug":"negative-radiation-damping-in-ship-hydrodynamic-calculations","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/negative-radiation-damping-in-ship-hydrodynamic-calculations\/","title":{"rendered":"Negative radiation damping in ship hydrodynamic calculations"},"content":{"rendered":"<p>&nbsp; &nbsp; &nbsp; The ship that I want to calculate and analyze is quite special, it is a breeding ship converted from a bulk carrier, and the two breeding compartments of the ship have been opened on the side, which makes its two compartments communicated with the seawater, when I carry out the hydrodynamic calculation of the ship, I find that the ship has negative radiation damping in the three directions of Heave, Roll, and Pitch. The motion response at the corresponding frequencies is particularly sharp.I have used this option of Generate Internal Lid\u3002The ship model and the corresponding calculation results are shown in Fig.<\/p>\n<p>&nbsp; &nbsp; &nbsp; May I ask what should be the best way to approach this situation that I have encountered and thank you for your answer.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/07\/24-07-2024-1721809241-1.png\" alt=\"\"><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/07\/24-07-2024-1721809266-2.png\" alt=\"\"><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/07\/24-07-2024-1721809284-3.png\" alt=\"\"><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/07\/24-07-2024-1721809298-4.png\" alt=\"\"><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/07\/24-07-2024-1721809312-5.png\" alt=\"\"><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/07\/24-07-2024-1721809656-6.png\" alt=\"\"><\/p>\n","protected":false},"template":"","class_list":["post-373370","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_author_ip":["13.229.65.177"],"_bbp_subscription":["349022","39507","183765"],"_btv_view_count":["238"],"_bbp_topic_status":["unanswered"],"_bbp_topic_id":["373370"],"_bbp_forum_id":["27792"],"_bbp_engagement":["39507","183765","349022"],"_bbp_voice_count":["3"],"_bbp_reply_count":["5"],"_bbp_last_reply_id":["379345"],"_bbp_last_active_id":["379345"],"_bbp_last_active_time":["2024-08-19 10:32:13"]},"test":"d1227078662gmail-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/373370","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":1,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/373370\/revisions"}],"predecessor-version":[{"id":373371,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/373370\/revisions\/373371"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=373370"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}