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ABAQUS mass matrix node number not coupling with INP file informations, how to read a .MASS file?

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thinkvantagedu

thinkvantagedu

Civil/Environmental
Joined
Jul 1, 2015
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4
Location
GB
Hi all, 

I export mass matrix for my 3d model with C3D4 element. There are 3 dof per node. In the INP file, it says there are 723 nodes. However, in the exported MASS.mtx file, it says there are 1446 * 3 = 4338 dofs, why are there 1446 nodes in MASS file? I think it should be 723 * 3 = 2169 dofs.

If 1446 is the correct number, then how to understand the .MASS file in ABAQUS?

Thanks!
 
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