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Bruce Mayer, PE Licensed Electrical & Mechanical Engineer BMayer@ChabotCollege.edu

Engineering 36. Real Life Application. Bruce Mayer, PE Licensed Electrical & Mechanical Engineer BMayer@ChabotCollege.edu. AL-3100 S2 Seismic Loading CG Measurements. Bruce Mayer, PE Dir. System Engineering 23Jul01. System FootPrint. MacroMicro Main Unit. Loader/UnLoader.

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Bruce Mayer, PE Licensed Electrical & Mechanical Engineer BMayer@ChabotCollege.edu

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  1. Engineering 36 Real LifeApplication Bruce Mayer, PE Licensed Electrical & Mechanical EngineerBMayer@ChabotCollege.edu

  2. AL-3100S2 Seismic LoadingCG Measurements Bruce Mayer, PEDir. System Engineering23Jul01

  3. SystemFootPrint

  4. MacroMicro Main Unit

  5. Loader/UnLoader

  6. 3100 MiniEnvironment Housing

  7. Results, MiniEnvironment • Total Weight/Mass = 25.3 kN, 260 kg, 570 lb • Maximum Leg Load = 1.33 kN (300 lb) • Center of Gravity Offset from Geometric Center • CG 3% to Left (toward side A-D) • CD 2% Forward (toward end A-B) • CG offset Attributed to Fan Motor Inverter-Drive Unit

  8. Leg Loading & Ctr of Gravity Test Apparatus C D Load Cell at Each Level-Leg A B

  9. Main Unit Center of GravityTest: X-Axis Tilt Main Unit Center of Gravity TestY-Axis Tilt

  10. Load/Unload Unit Center of GravityTest: X-Axis Tilt

  11. Load/Unload Unit Center of GravityTest: X-Axis Tilt BEFORE • Level • 0.04° Tilt AFTER • Level • 3.17° Tilt

  12. LCGD-1k Load Cell Test – No Load - 23Jul01 3100 SEMICon-West01 MiniEnvironment Crate Load Cell Lift Truck 13.65 Vdc Excitation Power Source NO Load OutPut Signal (mVdc)

  13. LCGD-1k Load Cell Test – Full Load - 23Jul01 3100 SEMICon-West01 MiniEnvironment Crate Load Cell Lift Truck 13.65 Vdc Excitation Power Source Loaded OutPut Signal (mVdc): 8.8 mV•(50lb/mV)  440 lbs

  14. XY CG Calc • Measure With Load Cells • Total SubSytem Weight • Reaction loads at All Floor Contact Points • Calc using RA & RB • Solve for W and Y1 • Check W by

  15. Vertical CG (z-CoOrd) Determination After Before

  16. Vertical CG Determination • Use XY CG Results • TIP System, and Measure Angle with Digital Protractor • Note that for Higher CG, the Restoring Lever Arm is Shortened More • Working the Geometry, and Doing the Math Find for Small Tilt Angles :

  17. 3x00 S2-§19Seismic Protection Bruce Mayer, PEDir. System Engineering19Feb02 • EarthQuake • Magnitude 8.0 • Kurile Islands • 03Dec1995

  18. 3x00 Seismic Protection Analysis Plan • Measure/Calc Weight and Center of Gravity • Consult S2/§19 for Lateral Loading Criteria (0.63g) • Consult Mechanical Design Drawing for Seismic Structural-Element Location & Configuration • Use Newtonian Vector Mechanics to Determine Force & Moment Loads • Use Solid-Mechanics Analysis to Determine Fastener (Bolt) Stresses • Use Mechanical-Engineering & Materials Properties to determine Factors of Safety

  19. BMayer

  20. S2-0200 Test SystemAL3120F, s/n 111001 3x00 S2Testing: Tatsuno Japan, Dec01 3x00_S2S8_Tatsuno_PhotoDoc_0112.ppt

  21. 3x00 Seismic Loading & Geometry BMayer

  22. Loading Geometry Detail

  23. Leg Loading & Ctr of Gravity Test Apparatus Load Cell atEach Level-Leg Jack to TiltFrame Unit P7310022a_mm_tilt_full.JPG A

  24. Center of Gravity Tilt-Testing: Before DigitalProtractor P7310050_Ul_gage_before.JPG

  25. Center of Gravity Tilt-Testing: After DigitalProtractor P7310055_me_GageAfter.JPG

  26. OverTurning Analysis • Analysis Parameters: • Worst Case → SHORTEST Restoring-Moment Lever-Arm • Lever Arms= 582mm, 710mm, 776mm (see slides 4&5) • Vertical (resisting/restoring) Acceleration of 0.85gper SEMI S2 §19.2.4 • Horizontal (overturning) Acceleration for non-HPM equipment of 0.63g per §19.2.2 • Results → Safe From Overturning WithOUT Restraints (but not by much!) 3x00_Seismic_Analysis_0202.xls

  27. Bracket Stress Analysis • Analysis Parameters • Assume Failure Pointat M6 or M10 Bolts • FOUR (4) Angle Brackets With a total of 8 Connecting & Anchor Bolts, Resist Shear • Two Bolts Per Point, Each Bolt Bears 50% of Load • Bolt Axial-PreLoad is negligible (Snug-Fit) • Shear Load Per Restraint Point = 500lb/2.22kN • Use Von Mises Yield Criteria: Ssy = 0.577Sy • Results 3x00_Seismic_Analysis_0202.xls

  28. 3x00 S2-§19- Appendix A - R5-1: Seismic Protection CheckList

  29. X See Analysis By B. Mayer PE: file 3x00_Seismic_Analysis_0202.xls X Factor of Safety 10x for Shear-Load

  30. S2-0200, §19 R5-1: Seismic Protection CheckList cont.1 X Anchors are well secured, and system is connected by Flexible Electrical & CDA conduits X FrameWork is Rigid Relative to Module Weight Given 0.63g acceleration X FrameWork is Rigid Relative to Module Weight Given 0.63g acceleration X Customer Supplied M10 Floor Anchors Should have Need Pull-Out Rating 1.1 kN (250 lb) Ref: ASTM Standard E 488 X NO attached Equipment

  31. S2-0200, §19 R5-1: Seismic Protection CheckList cont.2 X No Large and Brittle Components X X NOT APPLICABLE by Q.B3

  32. S2-0200, §19 R5-1: Seismic Protection CheckList cont.3 X No Hazardous Piping. The CDAir piping is flex-line X X X

  33. S2-0200, §19 R5-1: Seismic Protection CheckList cont.4 X X

  34. OLYMPUSIntegrated Technologies America, Inc. 3x00 S2-§19- Appendix B -Anchor-Bolt PullOut Ratings

  35. B. Mayer Research: 1911 25-Jul-01 • Ref: http://www.powers.com/manual/23pb.htm • 23.7 Performance DataTesting conducted according to ASTM Standard E 488. Ultimate Load Capacities - Carbon Steel Power-Bolt™

  36. OLYMPUSIntegrated Technologies America, Inc. 3x00 S2-§19- Appendix C -Engineering Mechanics Analsysis

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