{"id":295064,"date":"2023-07-27T06:47:37","date_gmt":"2023-07-27T06:47:37","guid":{"rendered":"\/forum\/forums\/topic\/ansys-shared-topology-options-issues\/"},"modified":"2023-07-27T10:36:19","modified_gmt":"2023-07-27T10:36:19","slug":"ansys-shared-topology-options-issues","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/ansys-shared-topology-options-issues\/","title":{"rendered":"Ansys Shared topology options issues in surface and edge shared"},"content":{"rendered":"

Hello, <\/p>\n

 I am doing modal analysis of a structure where two bodies are connected to each other  it has one solid plate and other is shell surface ( midsurface) which is connected to this in surface- edge contact, for this i am using share topology option in spaceclaim, but when i am running this in Ansys Mechanical this body showing near to zero frequency for first one that mean shell surface is not connected to other solid body,  if use bonded contact then it is moving with whole structure and not showing any zero frequency. Fixed boundary conditions is already there so there should not be any rigid body motions.<\/p>\n

The model is shown in below fig the solid bosy has two holes which has fixed boundary conditions applied.<\/p>\n

<\/p>\n

Below figure shows the results with shared topology options, here we can see that the first frequency is zero and others are non-zero this is what i wanted to know why is this happening i am missing any settings?<\/p>\n

a<\/p>\n

Belwo are the results when i am using bonded contact that too when choosing formulation as MPC the first zero frequency is now not coming, As i cant use this in my actual model because i have so many fins on the solid body., please help<\/p>\n

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