{"id":403449,"date":"2025-01-03T20:56:40","date_gmt":"2025-01-03T20:56:40","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/403449\/"},"modified":"2025-01-03T20:56:40","modified_gmt":"2025-01-03T20:56:40","slug":"403449","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/403449\/","title":{"rendered":"Reply To: Errors with multi-connected bodies using AQWA"},"content":{"rendered":"<p>&lt;p&gt;Thanks for the reply&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;The high stiffness in cable is required to simmulate the Hydraulic cylinder so that the hulls don&#8217;t move away because of the large hydrostatic forces exerting on the hulls away from the centerline.&nbsp;&lt;\/p&gt;&lt;p&gt;And the same thing withe fender stiffness tosimmulate the metal to metal contact between hulls so the arrangement between hinge, cable and fender will act like a class 3 lever&nbsp;&lt;\/p&gt;&lt;p&gt;&lt;br&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2025\/01\/03-01-2025-1735937147-Screenshot 2025-01-04 021526.png\" alt=\"\" \/>&lt;\/p&gt;&lt;p&gt;Anyway i tried the analysis with the reduced stiffness&nbsp;&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2025\/01\/03-01-2025-1735937316-mceclip0.png\" \/><img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2025\/01\/03-01-2025-1735937358-mceclip1.png\" \/>&lt;\/p&gt;&lt;p&gt;The inital length is reduced to simmulate the initial tension the cylinder&nbsp;&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;and the time doamain analysis gave error like this with a very small time step&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2025\/01\/03-01-2025-1735937482-mceclip2.png\" \/>&lt;\/p&gt;&lt;p&gt;And then stability analysis with following settings&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2025\/01\/03-01-2025-1735937543-mceclip3.png\" \/>&lt;\/p&gt;&lt;p&gt;But it stopped at 13696 iteration and throwed the above error so i gave 13000 iteration to get the idea of hinge load&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2025\/01\/03-01-2025-1735937637-mceclip4.png\" \/>&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2025\/01\/03-01-2025-1735937650-mceclip5.png\" \/>&lt;\/p&gt;&lt;p&gt;Still the load is heigh&lt;\/p&gt;&lt;p&gt;and with program controlled setting the following error came&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2025\/01\/03-01-2025-1735937724-mceclip6.png\" \/>&lt;\/p&gt;&lt;p&gt;So is there any chance to simmulate the Split hopper barge physics in ansys aqua.&nbsp;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-403449","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Thanks for the reply The high stiffness in cable is required to simmulate the Hydraulic cylinder so that the hulls don&#039;t move away because of the large hydrostatic forces exerting on the hulls away from the centerline. And the same thing withe fender stiffness tosimmulate the metal to metal contact between hulls so the arrangement between hinge,\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/403449\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Ansys Learning Forum | Ansys Innovation Space\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Reply To: Errors with multi-connected bodies using AQWA | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"Thanks for the reply The high stiffness in cable is required to simmulate the Hydraulic cylinder so that the hulls don&#039;t move away because of the large hydrostatic forces exerting on the hulls away from the centerline. And the same thing withe fender stiffness tosimmulate the metal to metal contact between hulls so the arrangement between hinge,\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/403449\/\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2025-01-03T20:56:40+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2025-01-03T20:56:40+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"Reply To: Errors with multi-connected bodies using AQWA | Ansys Learning Forum\" \/>\n\t\t<meta name=\"twitter:description\" content=\"Thanks for the reply The high stiffness in cable is required to simmulate the Hydraulic cylinder so that the hulls don&#039;t move away because of the large hydrostatic forces exerting on the hulls away from the centerline. 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