Hello,

I would like to ask you for some help. I am quite new to ABAQUS and recently I had to use it for my University project. I basically have to model a simple truss, export its Mass and Stiffness matrices and then update the model. I managed to export the matrices using the following sequence, which I added at the end of the input file :

*Step, name=Step-2

*MATRIX GENERATE, STIFFNESS, MASS, VISCOUS DAMPING,

STRUCTURAL DAMPING, LOAD

*MATRIX OUTPUT, STIFFNESS, MASS, VISCOUS DAMPING,

STRUCTURAL DAMPING, LOAD, FORMAT=MATRIX INPUT

*End Step

All was fine, but I have no idea how to read the .mtx files. They consist of 5 comma separated columns. I suppose these are the coordinates and the entries of the two matrices, but I don't know how to use the data.

Please help!