Detail publikace

Measuring Device for More Precise Mistuning Identification of Integrated Bladed Discs

KUČERA, O. PÍŠTĚK, V. FOMIN, O. KUČERA, P. SAGIN, S.

Originální název

Measuring Device for More Precise Mistuning Identification of Integrated Bladed Discs

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

In integrated turbine wheel designs, small deviations, known as mistuning, often occur in the modal properties of individual blades due to manufacturing tolerances and material inhomogeneity. During operation, this mistuning can cause some rotor blades to be subjected to significantly higher loads than predicted for an ideal rotor. The degree of rotor mistuning can only be determined using methods of experimental modal analysis. However, the manual use of the modal hammer cannot ensure precise repeatability of the force impulse’s location and timing, leading to inaccuracies. This article introduces a mechanism that replaces manual modal hammer operations, guaranteeing consistent impact location and timing while eliminating double strikes. The device was verified on bladed discs of various sizes, and its usability is demonstrated in this article on a turbine wheel of a marine engine turbocharger. The developed mechanism automates modal hammer strikes, ensuring precisely repeatable force courses and positioning for each impact. This automation reduces the measurement time and significantly improves the accuracy. The results of this research showed that even with careful manual operation of the modal hammer by an experienced operator, statistically significant differences arise in the repeated measurements of a bladed disc mistuning, whereas with the use of the presented measuring device, the results of the repeated measurements are practically identical.

Klíčová slova

bladed disc; mistuning; measuring device; turbocharger; marine engine

Autoři

KUČERA, O.; PÍŠTĚK, V.; FOMIN, O.; KUČERA, P.; SAGIN, S.

Vydáno

7. 5. 2025

Nakladatel

MDPI

ISSN

2073-8994

Periodikum

Symmetry

Ročník

17

Číslo

5

Stát

Švýcarská konfederace

Strany od

1

Strany do

15

Strany počet

15

URL

Plný text v Digitální knihovně

BibTex

@article{BUT197883,
  author="Ondřej {Kučera} and Václav {Píštěk} and Oleksij {Fomin} and Pavel {Kučera} and Sergii {Sagin}",
  title="Measuring Device for More Precise Mistuning Identification of Integrated Bladed Discs",
  journal="Symmetry",
  year="2025",
  volume="17",
  number="5",
  pages="1--15",
  doi="10.3390/sym17050717",
  issn="2073-8994",
  url="https://www.mdpi.com/2073-8994/17/5/717"
}