Following this, Femap reads the results and provides interpretation tools to facilitate the processing of output data. As a pre-processor, Femap assists with building a model of a part, and then translates that into a Nastran formatted “input file”. Nastran is essentially the math behind FEA. Simcenter Nastran (formerly NX Nastran) is an actively-developed offshoot of the Nastran code base, but is one of the most common solvers for finite element analysis (FEA). Nastran is a separate finite element solver product that can be bundled within Femap. Instead, programs such as Femap are used to prepare text file inputs to the solver using a combination of a modern graphical user interface built-in functions to automate what could otherwise be tedious and error-prone data entry tasks. Finite element solvers typically require strict text file-based formatting of your analysis setup, which is rarely done manually (by hand) anymore. It interacts with solvers such as Nastran to model physical behavior to assist in the drawing of conclusions about said behavior. Wondering the story is on Femap and Nastran? Femap is a finite element modeling and post-processing environment.
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