Nonparametric modeling of random uncertainties for dynamic response of mistuned bladed disks

Evangéline Capiez-Lernout (1) , Christian Soize (1)

1 LaM - Laboratoire de Mécanique

The random character of blade mistuning is a motivation to construct probability models of random uncertainties. Recently, a new approach known as a nonparametric model of random uncertainties, based on the entropy optimization principle, was introduced for modeling random uncertainties in linear and nonlinear elastodynamics. This paper presents an extension of this nonparametric model for vibration analysis of structures with cyclic geometry. In particular this probability model allows the blade eigenfrequencies uncertainties and the blade-modal-shape uncertainties to be modeled.

Keywords: uncertainty quantification; nonparametric probabilistic method; random uncertainties; modeling errors; model uncertainties; random vibrations; mistuned bladed disk; structural dynamics; cyclic geometry

Domains: Mechanics [physics.med-ph]; Probability [math.PR]; Statistics [math.ST]

Evangéline Capiez-Lernout, Christian Soize. Nonparametric modeling of random uncertainties for dynamic response of mistuned bladed disks. Journal of Engineering for Gas Turbines and Power-Transactions of the Asme, 2004, 126 (3), pp.610-618. ⟨10.1115/1.1760527⟩. ⟨hal-00686199⟩