{"id":218850,"date":"2022-07-19T13:09:08","date_gmt":"2022-07-19T13:09:08","guid":{"rendered":"\/forum\/forums\/topic\/clarification-on-modal-analysis\/"},"modified":"2022-07-22T07:00:20","modified_gmt":"2022-07-22T07:00:20","slug":"clarification-on-modal-analysis","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/clarification-on-modal-analysis\/","title":{"rendered":"clarification on Modal analysis and Transient analysis"},"content":{"rendered":"<p class=\"MsoNormal\"><span style=\"font-size: 12pt\">Hi all,<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"font-size: 12pt\">I have a shaft with 3 hydrodynamic bearings and one thrust collar.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"font-size: 12pt\">I need to find the shaft natural frequency in<\/span><\/p>\n<p class=\"MsoListParagraphCxSpFirst\" style=\"text-indent: -18.0pt\"><!-- [if !supportLists]-->&nbsp; <span style=\"font-size: 12pt\">&nbsp; &nbsp;1)<span style=\"font-style: normal;font-variant: normal;font-weight: normal;line-height: normal;font-family: 'Times New Roman'\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <\/span><\/span><span style=\"font-size: 12pt\"><!--[endif]-->Lateral direction<\/span><\/p>\n<p class=\"MsoListParagraphCxSpLast\" style=\"text-indent: -18.0pt\"><span style=\"font-size: 12pt\"><!-- [if !supportLists]-->&nbsp; &nbsp; &nbsp;2)<span style=\"font-style: normal;font-variant: normal;font-weight: normal;line-height: normal;font-family: 'Times New Roman'\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <\/span><!--[endif]-->Axial direction<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"font-size: 12pt\">I know the bearing stiffness in y &amp; z direction and axial stiffness (x direction) at thrust collar.<\/span><\/p>\n<p class=\"MsoNormal\"><a class=\"wp-colorbox-image cboxElement\" href=\"\/forum\/wp-content\/uploads\/sites\/2\/2022\/07\/19-07-2022-1658236019-mceclip0.png\"><img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2022\/07\/19-07-2022-1658236019-mceclip0.png\" width=\"505\" height=\"155\"><\/a><\/p>\n<p class=\"MsoNormal\"><span style=\"font-size: 12pt\">Queries:<\/span><\/p>\n<p class=\"MsoListParagraphCxSpFirst\" style=\"text-indent: -18.0pt\"><span style=\"font-size: 12pt\"><!-- [if !supportLists]-->1)<span style=\"font-style: normal;font-variant: normal;font-weight: normal;line-height: normal;font-family: 'Times New Roman'\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <\/span><!--[endif]-->Do I need to do two independent modal analysis one with lateral bearing stiffness alone and another with axial stiffness<\/span><\/p>\n<p class=\"MsoListParagraphCxSpMiddle\" style=\"margin-left: 144.0pt;text-indent: 36.0pt\"><span style=\"font-size: 12pt\">(or)<\/span><\/p>\n<p class=\"MsoListParagraphCxSpLast\"><span style=\"font-size: 12pt\">One single analysis with both the axial and lateral stiffness.<\/span><\/p>\n<p class=\"MsoListParagraphCxSpLast\"><span style=\"font-size: 12pt\">Regards,<\/span><\/p>\n<p class=\"MsoListParagraphCxSpLast\"><span style=\"font-size: 12pt\">saravanakumar<\/span><\/p>\n","protected":false},"template":"","class_list":["post-218850","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["224492","240"],"_bbp_author_ip":["23.218.93.111"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_edit_lock":["1658473178:131057"],"_btv_view_count":["3065"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["218850"],"_bbp_forum_id":["27791"],"_bbp_engagement":["240","224492"],"_bbp_voice_count":["2"],"_bbp_reply_count":["9"],"_bbp_last_reply_id":["222823"],"_bbp_last_active_id":["222823"],"_bbp_last_active_time":["2022-07-30 13:03:48"]},"test":"saravanakumarptb-trivenigroup-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/218850","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\/218850\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=218850"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}