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  1. rootsandwings

    AUTOSPC=YES Vs K6ROT=1 in Nastran

    I got 0.5 Hz higher frquency when I used K6ROT=1 instead of AUTOSPC=YES while working on a structure which has a 1st frequency of about 15 Hz. The model is essentially built with CQUAD4 elements and with a few CHEXA and beam elements. Please adivse if anyone has a specific recommendation on the...
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