Eng-Tips is the largest forum for Engineering Professionals on the Internet.
Members share and learn making Eng-Tips Forums the best source of engineering information on the Internet!
-
Congratulations JStephen on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!
-
Nastran op4 & pch modification
Hi, I was assigned with a task to prepare a FEM for a CLA analysis (coupled loads analysis). The process should consist of standard nastran superelement reduction resulting in OP4/PCH/ASM file. I should deliver the matrices separated (stiffness, mass, OTM forces, OTM accelerations, OTM... -
OTM matrices manipulation
I'm preparing a reduced model of my FEM for a Coupled load analysis (CLA). I need to deliver the following matrices: KXX - stiffness matrix MXX - mass matrix AC01 - acceleration OTM matrix DP01 - displacement OTM matrix LTM - load OTM matrix I'm using Femap with Simcenter Nastran as a solver... -
Using superelements in Femap Nastran
Hi, I'm using Femap as a preprocessor for Nastran solver. I want to reduce a portion of my model to a superelement and then use it in a subsequent analysis. I'm using these options for Craigh-Bampton reduction...
