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Conception robuste en vibration et aéroélasticité des roues aubagées de turbomachines

Abstract : Bladed disks are components which dynamic behaviour are very sensitive to mistuning induced by the manufacturing process which makes blades differ from one another. This sensitivity increases in general the vibrations. The objective of this research is to propose new methods for optimizing design in vibration of bladed disks with respect to mistuning. Optimization is done for the forced response while keeping a sufficient aeroelastic stability margin. In this context, detuning by modifying geometrically the blades’ shapes is used. To reduce numerical computational costs, a new reduction method for geometrically detuned bladed disks is developed and validate. Uncertainties modeling including mistuning is done with a non-parametric probabilistic approach. An application by optimizing the design in vibration of a realistic bladed disk is finally done in two steps : (1) An optimization of the different detuned blades arrangements around the disk and (2) an optimization of the geometric modification level of blades. The results show that a robust design of the bladed disks has been done using geometric detuning
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  • HAL Id : tel-00529002, version 2

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Moustapha Mbaye. Conception robuste en vibration et aéroélasticité des roues aubagées de turbomachines. Autre. Université Paris-Est, 2009. Français. ⟨NNT : 2009PEST1068⟩. ⟨tel-00529002v2⟩

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