Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Recent content by zerodof

  1. zerodof

    biw interior acoustic

    Mert1 thanks for that. Did you use BW or CP option.
  2. zerodof

    biw interior acoustic

    What would you expect if you use manual mesh.What parametres should be chosen to get optimistic results on ACMODL
  3. zerodof

    SOL 106- not converging

    In sol 106 ,make sure you dont have any rbe2 or bar elements as they are linear elements. The other thing to try out is to make more than one load cases and increase the number of increments on NLPARM card until you see any convergence. Note that convergence level ,and add another loadcase and...
  4. zerodof

    biw interior acoustic

    Has anybody got any current industry experience of coupled acoustic modelling. I am interested in modal frequency response analysis. What sort of mesh density can give optimistic results on bothe structural and cavity. thanks
  5. zerodof

    Latch modelling

    The latches are very non linear and difficult to model. The tailgate modes are senstive to latch stiffnesses and these modes flare the torsional body modes.
  6. zerodof

    Latch modelling

    Hi, I am looking at the modes of the automotive closures in installed conditions using FE model. The latch stiffness is critical. Has anybody got any stiffness numbers(spring rates) for a fore aft,vertical and lateral stiffness taht can be used in the analysis. Has anybody got any idea of...
  7. zerodof

    nastran nvh

    Thanks for the comments Assuming I use sol 111 approach and use free free condition. I will need bailout card if I use unit force on RLOAD card. Which I am not sure if its correct. Can I use SPCD card. If I can then I would not be able to apply the unit force.
  8. zerodof

    nastran nvh

    When you run it in frequency domain, you will have an option to run it as modal frequency NASTRAN sol111 or direct frequency sol108.Which one?? The other question that arise is with boundary condition, as whether to run as free free state or constrained state. To reduce the CPU time, is it...
  9. zerodof

    nvh

    Should this be calculated in free free condition or constrained. If constrained then where to constrain. Or it does not matter where to constrain.
  10. zerodof

    nastran nvh

    I have already published this question in other forum. What is the best method to calculate point dynamic stiffness (mm/sec/Newton) in nastran for automotive application.
  11. zerodof

    Releasing a forced displacement

    Can any body advise on the best practice for calculating point mobility using Nastran.
  12. zerodof

    nvh

    Can anybody give me an idea on how to calculate point mobility using Nastran/FEA for automotive applications.
  13. zerodof

    rigid body modes

    yes hydro mounts
  14. zerodof

    rigid body modes

    4 cylinders, 3 pt mt system
  15. zerodof

    rigid body modes

    It is a transverse engine and it idles around 750 rpm approx.
See more

Part and Inventory Search

Back
Top