{"id":165273,"date":"2023-03-17T08:59:54","date_gmt":"2023-03-17T08:59:54","guid":{"rendered":"\/knowledge\/forums\/topic\/why-is-the-fluid136-method-for-obtaining-squeeze-film-damping-giving-a-small-negative-beta-value-and-issuing-a-warning\/"},"modified":"2023-07-31T12:30:56","modified_gmt":"2023-07-31T12:30:56","slug":"why-is-the-fluid136-method-for-obtaining-squeeze-film-damping-giving-a-small-negative-beta-value-and-issuing-a-warning","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/why-is-the-fluid136-method-for-obtaining-squeeze-film-damping-giving-a-small-negative-beta-value-and-issuing-a-warning\/","title":{"rendered":"Why is the FLUID136 method for obtaining squeeze-film damping giving a small  negative beta value and issuing a warning?"},"content":{"rendered":"<p>Squeeze-film damping is almost purely viscous and alpha damping dominates.  The warning message can probably be ignored.  A negative value for beta damping is quite common and will be accepted by ANSYS.  There could be a problem at higher frequencies if  the negative value is used, so you may just want to use the alpha damping value.<\/p>\n","protected":false},"template":"","class_list":["post-165273","topic","type-topic","status-publish","hentry","topic-tag-4877","topic-tag-low-frequency","topic-tag-mechanical-apdl-f-ansys","topic-tag-multiphysics-and-emag-apdl","topic-tag-structural-mechanics"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_wp_page_template":["default"],"_bbp_last_active_time":["3\/15\/2023 20:20"],"_bbp_forum_id":["27789"],"_bbp_author_ip":["23.56.168.180"],"_btv_view_count":["952"],"siebel_km_number":["565894"],"product_version":["10"],"km_published_date":["2006-12-20T00:00:00.000Z"],"family":["Structural Mechanics"],"application_name":["Mechanical APDL (f. ANSYS)"]},"test":"articlesansys-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics\/165273","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics\/165273\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/media?parent=165273"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}