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  1. CG1980

    Acoustic-Structural Coupling in Abaqus

    I agree with you, but i guess i'm missing something in order to get increased frequencies of the paper (the tank is clamped at the bottom). My big question is: in a coupled acoustic-structural analysis like this one is the *TIE constraint between tank and fluid enough to define the coupling or...
  2. CG1980

    Acoustic-Structural Coupling in Abaqus

    @Mustaine3: even if i activate NLGEOM in the static step the frequencies don't change @rrg1016: if i run the step without SIM architecture in Lanczos Eigensolver then frequencies tend to decrease and modeshapes to change, but that's not what it should happen (frequencies should increase their...
  3. CG1980

    Acoustic-Structural Coupling in Abaqus

    Thanks for the hints. Yes, both the steel Young Modulus and water bulk modulus misses a zero, but they should be ok in my input file. I'll try with the NLGEOM activated, but my feeling is that there's something missing in the acoustic-structural coupling definition: in fact if i change the fluid...
  4. CG1980

    Acoustic-Structural Coupling in Abaqus

    Hello, i'm trying to reproduce the examples reported in the following article "Eigencharacteristics of fluid filled tanks:..." (http://task.gda.pl/files/quart/TQ2006/04/TQ410S-E.PDF), but i'm having some troubles while defining acoustic-structural coupling interaction (my input file is attached...

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