{"id":355303,"date":"2024-03-05T02:31:56","date_gmt":"2024-03-05T02:31:56","guid":{"rendered":"\/forum\/forums\/topic\/exporting-stiffness-matrix-and-mass-matrix-from-ansys-wb\/"},"modified":"2024-05-04T23:38:33","modified_gmt":"2024-05-04T23:38:33","slug":"exporting-stiffness-matrix-and-mass-matrix-from-ansys-wb","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/exporting-stiffness-matrix-and-mass-matrix-from-ansys-wb\/","title":{"rendered":"Exporting Stiffness matrix and Mass matrix from Ansys WB"},"content":{"rendered":"

Hello,<\/p>\n

I hope you’re doing well!<\/p>\n

I’m using Ansys Workbench 2024 Student Version.
I’m trying to export stiffness and mass matrix from modal anlysis, as i need to perform a multibody dynamics analysis based on that data.<\/p>\n

I have used the following code as an APDL Command under the Solutions Tree.<\/p>\n

—
\/AUX2<\/div>\n
 <\/div>\n
! Combine .FULL files<\/div>\n
COMBINE, FULL<\/div>\n
 <\/div>\n
! Enters the database processor<\/div>\n
\/POST1<\/div>\n
 <\/div>\n
! Stiffness<\/div>\n
*DMAT, MatKD, D, IMPORT, FULL, file.full, STIFF<\/div>\n
 <\/div>\n
! Mass<\/div>\n
*DMAT, MatMD, D, IMPORT, FULL, file.full, MASS<\/div>\n
 <\/div>\n
! Sparse matrices<\/div>\n
*SMAT, MatKS, D, IMPORT, FULL, file.full, STIFF<\/div>\n
*SMAT, MatMS, D, IMPORT, FULL, file.full, MASS<\/div>\n
 <\/div>\n
! Write matrices to files<\/div>\n
*PRINT, MatMS, Msparse.matrix<\/div>\n
*PRINT, MatKS, Ksparse.matrix<\/div>\n
*PRINT, MatKD, Mfull.matrix<\/div>\n
*PRINT, MatMD, Kfull.matrix
—<\/p>\n

The analysis as well as the command runs perfectly without any error displayed.
the file.full is generated and I can see that in the solver directory.<\/div>\n

My issue is that I’m not able to generate or find both the mass as well as the stiffness matrix anywhere
In the solution information It shows the following as an error,<\/p>\n

<\/a><\/p>\n

As mentioned on the forum, I have unchecked the Distributed box, as well as changed the delete unneeded files to no.<\/p>\n

The Physical memory (RAM) available shows out to be about 16 GB available.<\/p>\n

Please provide guidence.
Thank you in advance!<\/p>\n","protected":false},"template":"","class_list":["post-355303","topic","type-topic","status-closed","hentry","topic-tag-Modal_Analysis-1","topic-tag-massmatrix2dbeamelement-1","topic-tag-out-of-memory","topic-tag-peteroznewman","topic-tag-stiffness-matrix"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["302716","20905"],"_bbp_author_ip":["23.206.193.41"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["3332"],"_bbp_topic_status":["answered"],"_edit_lock":["1710983389:244823"],"_bbp_topic_id":["355303"],"_bbp_forum_id":["27791"],"_bbp_engagement":["20905","302716"],"_bbp_voice_count":["2"],"_bbp_last_reply_id":["365547"],"_bbp_last_active_id":["365547"],"_bbp_last_active_time":["2024-05-04 23:37:58"]},"test":"kkolha2uic-edu"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/355303","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":3,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/355303\/revisions"}],"predecessor-version":[{"id":358244,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/355303\/revisions\/358244"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=355303"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}