{"id":386686,"date":"2024-09-24T17:35:59","date_gmt":"2024-09-24T17:35:59","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/386686\/"},"modified":"2024-09-24T17:35:59","modified_gmt":"2024-09-24T17:35:59","slug":"386686","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/386686\/","title":{"rendered":"Reply To: Bonded contact failed in Modal Analysis"},"content":{"rendered":"<p>&lt;p&gt;Thanks for prompt reply!&lt;\/p&gt;&lt;p&gt;Yes, I am performing Pre-stress Modal Analysis. I have gone through that video, and understand that.&lt;\/p&gt;&lt;p&gt;Static Structural : In this, as mentioned above using <strong>two steps<\/strong> for assembly of Elliptical cam and ball bearing.&lt;\/p&gt;&lt;p&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;BC&#8217;s : Center node of CAM is allowed to rotate in&nbsp; direction and in plane X-Y motion is fix&lt;\/p&gt;&lt;p&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Contact : In step 1 uses frictionless, to solve interference. Step 2 applied Bonded contact between two edges&lt;\/p&gt;&lt;p&gt;In Modal, I am expecting to get 1st natural frequency to be zero i.e rigid body motion about z. but it showing non zero frequency (373 Hz).&lt;\/p&gt;&lt;p&gt;Before modal, contact status between CAM and Inner race of bearing is <strong>Bonded.&nbsp;<\/strong>(with gap of 40 micron along Minor axis (x-horizontal) and 0 gap along major (y-vertical). Does this gap causes any problem or not.&lt;\/p&gt;&lt;p&gt;For more details about model, pleae go through Last msg again.&lt;\/p&gt;&lt;p&gt;In pre-stress modal analysis, does modal block consider deformation after load step 2. cause I tried to search pre stress problem which has used 2 or more load steps in structural stage but didn&#8217;t found any problem with 2 or more load steps on youtube and Ansys forum. Every problem has only 1 Load step in Structural part. Please clarify on this as well.&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-386686","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 prompt reply!Yes, I am performing Pre-stress Modal Analysis. I have gone through that video, and understand that.Static Structural : In this, as mentioned above using two steps for assembly of Elliptical cam and ball bearing. 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