Optimization for Transient Thermo-Mechanics for High-Precision Structures

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

+=http://www.asml.com/imglib/structure/asml_logo.png#Challenge the futurePresentation OutlineMotivationResearch QuestionCooling OptimisationConclusion

#Challenge the futureNano-Scale Features in Electronics

20 nm

Images: ASML, etech.com, Intel, Wikipedia#Challenge the futurehttp://www.intel.com/pressroom/archive/releases/2006/20060125comp.htmhttp://www.asml.com/asml/show.do?lang=EN&ctx=44169http://blog.etech.com/2010/08/17/nokia-c6-phone-disassembly/http://en.wikipedia.org/wiki/Integrated_circuit3

Positioning (ideal)

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Positioning (with deformation)

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Transient Thermal Stresses

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Transient Thermal Stresses

#Challenge the futureCooling

Uniform

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OptimisedCooling

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YesNoOptimisation ProcessSTART

Sufficient?ENDTestPropose

Smart way to propose new designs?#Challenge the futureResearch QuestionHow can thermal modes be used to optimise coolingin a transient thermo-mechanical system?#Challenge the future

Thermal Modes

Temperature FieldDeformation#Challenge the future

Thermal ModesTemperature FieldDeformation

#Challenge the futureThermal Modes

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#Challenge the futureThermal Modes

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#Challenge the futureModal Reduction

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Modal Significance MeasuresExcitation=

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Modal Significance MeasuresObservability (in the objective)

O=0.01O=-5#Challenge the futureModal Significance MeasuresTime-objective Relevancetime0.5 s

r=0.001r=50

#Challenge the futureModal Significance MeasureTotal Significance

Excitation

Observability

Time-objective Relevance#Challenge the futureModal Reduction usingModal Significance Measures

#Challenge the futureOptimised Cooling

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Optimised Cooling

#Challenge the futureOptimisation Convergence

#Challenge the futureOptimised Cooling

#Challenge the futureOptimisation Convergence

#Challenge the futureHow can thermal modes be used to optimise coolingin a transient thermo-mechanical system?ConclusionModal reduction technique.Potentially low-cost sensitivity indicators. Investigate heuristics.Use in modal sensitivity analysis.Reduced set of design variables.

#Challenge the futureNext StepsSensitivity indicators(systematic experiments, analytical solution)Use in eigensensitivity analysisModal reductionEstimate error from objective significance measures?

#Challenge the futureThank You!http://www.asml.com/imglib/structure/asml_logo.png#Challenge the future