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 cowski on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  1. admiral007

    FEMAP CSV Input

    That's copied verbatim from the User Manual. Again, as I said, I know what's said in the FEMAP User Manual and Commands Manual. And again, as I said, this explanation and example aren't helpful. I still don't understand how to format the CSV with the data I have. An example of the data I...
  2. admiral007

    FEMAP CSV Input

    I know how to import/attach CSV. The problem I have is I don't know what format the CSV is supposed to be in. I want to see an example CSV so I know how to format the results data I do have into a model that already exists.
  3. admiral007

    FEMAP CSV Input

    Hey all, I see in the FEMAP Commands and User manual that it's possible to import results from a CSV file, but its explanation and example aren't helpful. I'm looking for an example CSV file that FEMAP can read results from. Can anyone help? Thanks in advance.
  4. admiral007

    Fuselage Skin Panel Shear Flow

    Well, then that's the answer to my original question. I don't know if I forgot or if I ever knew to begin with that the output XY force is force/length and not force. By the way, where does it say that Fx, Fy and Fxy are force per length? I've looked in the Nastran Quick Reference and in...
  5. admiral007

    Fuselage Skin Panel Shear Flow

    The output set for a given CQUAD in this model is: 8006..Plate X Membrane Force 8007..Plate Y Membrane Force 8008..Plate XY Membrane Force 8011..Plate X Bending Moment 8012..Plate Y Bending Moment 8013..Plate XY Bending Moment 8014..Plate X TransShear Force 8015..Plate Y TransShear Force...
  6. admiral007

    Fuselage Skin Panel Shear Flow

    OK, apologies. This is going be analysis for a cut out with doubler. I want to demonstrate that making the cut out and adding the doubler returns the panel to equivalent strength. Based on the low level of shear in the panel, the doubler will be sized to fit two rows of fasteners rather than...
  7. admiral007

    Fuselage Skin Panel Shear Flow

    @rb1957 - thanks, That clears things up for me. I'm now getting values that seem reasonable that I can work with. @SWComposites - unfortunately, not my FEM so I can't change anything. I just have spreadsheet data 🤷‍♂️
  8. admiral007

    Fuselage Skin Panel Shear Flow

    I’d like help solving for the shear flow in a skin panel. I have a panel section in an aft fuselage. Section is unpressurized. It’s a skin panel framed by two stringers and two frames. I have limited FEM data output (spreadsheet with output data on the elements). The FEM in the area I'm...
  9. admiral007

    MFLUID Analysis?

    Does anyone know which analysis you have to perform in order to get MFLUID results? Here's a quick description of my model: - Pressure vessel. - Wetted element surfaces are on the inside of the vessel. - MFLUID connections made on the wetted surface of the elements. - MFLUID reference...
  10. admiral007

    Wing Box Design

    @rb1957 everything you said, you nailed spot on.
  11. admiral007

    Wing Box Design

    @MikeHalloran yes - it's a very odd supplier relationship. i'm new to the program, and i'm still a junior engineer, but i know this is a weird (bad) relationship.
  12. admiral007

    Wing Box Design

    @aerodesign i can't go into any more detail about the specifics of the design. i can tell you that it does have to be the size it is, but so far as i can tell from our supplier, they didn't do any design iterations - they just chose one design and went with it. my job is to check their design...
  13. admiral007

    Wing Box Design

    @ rb1957: I'm an contract aero engineer trying to validate this design for use on our program. This design was created by one of our suppliers (a first of type for them). They designed it and created the FEM as validation. They have someone who has worked in FEMAP for several years, but I...
  14. admiral007

    Wing Box Design

    To give you an idea of the size, the span is about 6.5 meters and the chord is about 13.5 meters
  15. admiral007

    Wing Box Design

    I can't go into details about the program I'm working on, so I'm sorry to be vague, but this is not a true "wing" and it's aspect ratio is small. This wing needed to be broken up, from what I understand, to be easily shipped. Why is DESIGN 1 bad, specifically? I know it's bad, and I've tried...
  16. admiral007

    Different ways of modeling fasteners

    SWComposites - thank you for the reply. My concern is that the creators of this model were being too conservative when they placed these fasteners. I do want to see the stress field in the vicinity of these fasteners, and I don't think that has been accurately captured in this model. I'm...
  17. admiral007

    Wing Box Design

    I am reviewing a design of a wing. This is a very large wing, and for manufacturing purposes, it has been split into several parts (leading edge, control surface and the wing box). The designers also split up the wing box. My question has to do with how they split up the wing box. They...
  18. admiral007

    Different ways of modeling fasteners

    Hello all, I am currently reviewing a FEM. There is a critical section of this model in which two large bays are fastened together using about 20 "large" bolts. I'm examining this area because I am expecting high stresses and shear forces around the bolted connections. If I were making this...

Part and Inventory Search

Back
Top