1 / 10

MKIR Frame Finite Element Analysis

MKIR Frame Finite Element Analysis. Model, Results, and Recommendations. Corner Support Brackets. ISS Attachment Brackets. Main Frame to Extension Frame Angle Brackets. Main Frame. Extension Frame. Main Frame to E-Box Angle Brackets. Main Frame Gussets.

carrington
Download Presentation

MKIR Frame Finite Element Analysis

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. MKIR Frame Finite Element Analysis Model, Results, and Recommendations

  2. Corner Support Brackets ISS Attachment Brackets Main Frame to Extension Frame Angle Brackets Main Frame Extension Frame Main Frame to E-Box Angle Brackets Main Frame Gussets Extension Frame to E-Box Angle Brackets Corner Support Plates Overall Model Description(E-Boxes Not Shown)

  3. Modeling Assumptions • E-Boxes modeled as empty boxes with density modified to give correct weight • All angle bracket bolts modeled using a four bolt pattern • Recommended design change • Connections: • Angle and corner bracket connections are bolted • Extension and main frame tubing is welded • Main frame gussets are bolted to main frame • Attachment brackets are welded to the main frame • Corner support plates are welded to the main frame • Main frame to extension brackets rearranged to improve stress margins

  4. Model Setup • Model Stats • 66,401 Nodes and 67,356 Elements • Entire model except bolts are linear quad thin shell elements • Bolts are linear DOF springs • Boundary Conditions • Clamped on corners of attachment bracket’s top face (Light Blue at left) • Loads • 1 G Applied in each orthogonal direction

  5. Linear Static Stress Results(Main Frame) • 7177 psi max von mises stress occurs in Y load case

  6. Linear Static Stress Results(Extension Frame) • 5082 psi max von mises stress occurs in Y load case

  7. Mass Properties and Margins

  8. Bolt Analysis

  9. Results Discussion • All Margins are Positive G • Greater than 4 for frame structure • Greater than 2 for fasteners • Could be higher if bigger/better fasteners used • Using aluminum would triple the deflections, but would give the same stresses • More difficult to weld • Heat treatment probably necessary • Only provides weight savings, not increase in stress margins

  10. Recommendations • Use four bolt pattern on each angle bracket face instead of two bolt pattern • Better handles moments on the brackets • Consider different positions for extension frame angles • Use configuration similar to the assumed location connecting main frame to e-box • More effective support for different load cases

More Related