francesco aloschi 0 Report post Posted November 22, 2018 I build a mesh in hypermesh (nastran library) and i need to perform a modal analysis i used nastran solver but it didn't generate an .op2 file. No error message is displayed and i followed all the procedures.Moreover the op2 file is generated only for few seconds after it disappear. is that any solution of that ? in attach there are my nastran file and the report nastranfile.bdf nastranfile.log Quote Share this post Link to post Share on other sites
Guest Report post Posted November 23, 2018 Hi @francesco aloschi Not sure if an output request has to be requested to get .op2 file for Nastran solver to write the results. If yes, please let me know the card details and I can check in HM regarding the same. If no, I would suggest you check with Nastran support. Quote Share this post Link to post Share on other sites
francesco aloschi 0 Report post Posted November 23, 2018 i'm giving you the file if you run it in nastran it gives fatal error 9002.2 (error in main bulk data section ). thanks in advance for your help 4feetheadsjunction(final) nastran.hm. My goal is modal analysis for that model. Quote Share this post Link to post Share on other sites
tinh 741 Report post Posted November 23, 2018 Could you try running it by Optistruct? Quote Share this post Link to post Share on other sites
Guest Report post Posted November 23, 2018 Hi, Can you remove V2 on EIGRL card and check if that helps? Quote Share this post Link to post Share on other sites
francesco aloschi 0 Report post Posted November 23, 2018 i tried but it doesn't work Quote Share this post Link to post Share on other sites
Guest Report post Posted November 23, 2018 OptiStruct generates result file (h3d) (well I have to delete few elements as they are not cooperating with the analysis) Quote Share this post Link to post Share on other sites
francesco aloschi 0 Report post Posted November 23, 2018 which type of elements will be deleted ? so what is your suggestion for this problem ? Quote Share this post Link to post Share on other sites
Guest Report post Posted November 23, 2018 I have deleted RBE2 because of conversion, I would suggest you contact Nastran support. Quote Share this post Link to post Share on other sites
francesco aloschi 0 Report post Posted November 23, 2018 i will do it because it doesn't work also without rbe2 connections Quote Share this post Link to post Share on other sites
