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Example 4.4

Example 4.4. No damper. No damper. TMD at node 2 Tune to mode 1. TMD at node 2 Tune to mode 1 modal mass =1.25 modal amplitude =1.0 Want equivalent modal damping = 0.1 Requires mbar =.065 The appropiate damper parameters are f=.91 =.145

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Example 4.4

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  1. Example 4.4

  2. No damper

  3. No damper

  4. TMD at node 2 Tune to mode 1 TMD at node 2 Tune to mode 1 modal mass =1.25 modal amplitude =1.0 Want equivalent modal damping = 0.1 Requires mbar =.065 The appropiate damper parameters are f=.91 =.145 mdamper=1.25mbar =.081

  5. Mode shapes -TMD tuned to mode 1

  6. Modal periods

  7. Periodic forcing T = 1s

  8. Periodic forcing T =1s

  9. TMD at node 2 - Tuned to mode 2

  10. TMD tuned to mode 2

  11. TMD tuned to mode 2

  12. Periodic forcing T =.4stuned to mode 2

  13. TMD tuned to mode 2periodic forcing T =.4s

  14. TMD tuned to mode 2periodic forcing = .4s

  15. TMD at node 2 Tuned to mode 1T =1s

  16. TMD at node 2 Tuned to mode 1T=1s

  17. Earthquake loading - No TMD

  18. TMD tuned to mode 1

  19. Earthquake loading -No TMD

  20. TMD tuned to mode 1

  21. Tforcing=1sTMD at node 2 Tuned to mode 2T = .408s

  22. Tforcing=1sTMD at node 2 Tuned to mode 2T =.408s

  23. Example 4.2

  24. Mode shapes

  25. Inter-element profiles

  26. Damping ratios

  27. Modal response- T=1sec

  28. Damper properties

  29. Nodal and damper displacementsT=1sec

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