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  1. stefanix1972

    Nastran random response analysis on a free-free structure

    Dear all, I'm investigating the response to a disturb of a spacecraft in flight. The disturb can be thought as a random acceleration input applied to a node (as a PSD, for example). My approach would be to use SOL111, DLOAD and RANDPS, but the point is that structure is a free-free one...
  2. stefanix1972

    MONPNT3 output in pch rather than in f06

    Dear Community, as pointed out in thread825-467136 I see that MONPNT3 can sum selected grid point forces to a user chosen monitor point. This can be done by MONITOR case control section instruction. Unfortunately, results are provided in f06 file but not in a pch file, that would be much better...
  3. stefanix1972

    Spacecraft transient dynamic analysis with SOL400

    Dear all, I'm trying to analyze a spacecraft manouevre around its CoG by Nastran 2019 SOL400 transient dynamic analysis. Preliminarly, I checked with a small model what the best solution could be, and I found other SOLs giving problems: SOL109 direct transient gives "inflated" deformed shape...

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