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Found 5 results

  1. I am creating flexible body in optistruct of a truck chassis with trailer which is very big model with so many number of nodes and elements. CBN method is used UB_FREQ given 20 but i am getting 131 modes and fbi file size is about 15GB which is too much to import in SIMPACK and then i gave NMODES 40 but still its giving 131 modes which is very high So please help me with this Thank You
  2. When we using model reduction methods for FE model when creating flexible body Can we see that how much DOF it is decreased in hypermesh ?
  3. Can we check the mathematical calculations when using model reduction methods like how its calculating or at least can we know see the stiffness matrix?? in Hypermesh-Optistruct
  4. In hypermesh, while creating the flexible bodies i wanted to use CMSMETH card CBN and CB Method Now i wanted to know, will there be any difference in stiffness matrix in CBN and CB method? Awaiting reply Thank you
  5. Hello, I was working in a normal modes analysis of an assembly model, Only one attached component it is of interest so I would like to use the direct matrix input for the environment of the component, I have create the ASET constraints in the connection nodes of the environment, delete the retained elements (elements of the component of interest) and add the CMSMET (using the CBN method) card, but when I run the analysis the warning 3865 appear: ** WARNING # 3865 The generated SPOINT IDs for DMIG matrix has overlapped with existing GRID IDs of the model. starting SPOINT ID for DMIG = 169938 ending SPOINT ID for DMIG = 169938 the overlapped GRID ID = 169938 I hope you can help me to solve this problem, thanks in advance.
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