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Thermal Modes for the Optimisation of Transient Thermo-Mechanics

Thermal Modes for the Optimisation of Transient Thermo-Mechanics

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Thermal Modes for the Optimisation of Transient Thermo-Mechanics

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  1. + = Thermal Modes for the Optimisationof Transient Thermo-Mechanics Johann Dugge – MSc Presentation – 09 November 2012 Prof.dr.ir. A. van Keulen (TU Delft) Ir. M. Koevoets (ASML) Ir. E.C. Hooijkamp (TU Delft) Dr.ir. R. Delfos (TU Delft)

  2. Presentation Outline • Motivation • Research Question • Cooling Optimisation • Conclusion

  3. Nano-Scale Features in Electronics 20 nm Images: ASML, etech.com, Intel, Wikipedia

  4. Positioning (ideal)

  5. Positioning (with deformation)

  6. Transient Thermal Stresses

  7. Transient Thermal Stresses

  8. Cooling Uniform

  9. Cooling Optimised

  10. Optimisation Process Propose No Sufficient? Yes START Test END Smart way to propose new designs?

  11. Research Question How can thermal modes be used to optimise cooling in a transient thermo-mechanical system?

  12. Thermal Modes Temperature Field Deformation

  13. Thermal Modes Temperature Field Deformation

  14. Thermal Modes +

  15. Thermal Modes +

  16. Modal Reduction

  17. Modal Significance MeasuresExcitation = 1 0.7 0.0 + +

  18. Modal Significance MeasuresObservability (in the objective) O=0.01 O=-5

  19. Modal Significance MeasuresTime-objective Relevance time 0.5 s r=0.001 r=50

  20. Modal Significance MeasureTotal Significance Time-objective Relevance Excitation Observability

  21. Modal Reduction usingModal Significance Measures

  22. Optimised Cooling

  23. Optimised Cooling

  24. Optimisation Convergence

  25. Optimised Cooling

  26. Conclusion How can thermal modes be used to optimise cooling in a transient thermo-mechanical system? • Modal reductiontechnique. • Potentially low-cost sensitivity indicators. • Investigate heuristics. • Use in modal sensitivity analysis. • Reduced set of design variables.

  27. Next Steps • Sensitivity indicators • (systematic experiments, analytical solution) • Use in eigensensitivity analysis • Modal reduction • Estimate error from objective significance measures?

  28. Thank You!