Abstract
Bladed disk mistuning is a significant contributor to gas-turbine high cycle fatigue. Frequency veering is known to increase bladed disk sensitivity to mistuning, but the reasons for the increased sensitivity are not well understood. The frequency veering effects on mistuned bladed disk forced response are investigated. Expressions for the forced response of a mistuned bladed disk with frequency veering are developed. These expressions are cast in a form that identifies the mechanisms through which frequency veering affects mistuned forced response. The accuracy of these expressions is then demonstrated by the use of two numerical examples. The first example allows for the direct observation of frequency veering effects on mistuned response. The second example demonstrates the applicability of the theoretical development to realistic bladed disk models.
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