Rotational inertia of nodes with 6 DoF ommited in (.full.mat) file

Pedro_Millan
Pedro_Millan Altair Community Member
edited October 16 in Community Q&A

Dear all,

 

I am extracting the mass matrix of a structure modeled with shell elements (CQUAD4) using OUTPUT,MATRIX,FULL,SPARSE. However, the rotational inertia corresponding to the nodes (with 6 DoF) is omitted in the .full.mat file.

 

Below is an example of the results I am getting, for a lumped mass matrix, where the rotational inertia (Ixx, Iyy, Izz) for node 1 are missing (which would correspond to missing the headers:  '4       4       4', '5       5       5', and '6       6       6', that are omitted).

 

Please let me know if you any idea how to solve or go arround this problem.

 

Best regards,

Pedro Millan

 

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MASS                                   0       2       3     408     408   1p,8e16.9
       1       1       1
 1.524147950E-07
       2       2       2
 1.524147950E-07
       3       3       3
 1.524147950E-07
       7       7       7
 3.051891042E-07
       8       8       8
 3.051891042E-07
       9       9       9

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