scholarly journals Fluid-Structural Coupling Effects on the Dynamics of Mistuned Bladed Disks

AIAA Journal ◽  
2007 ◽  
Vol 45 (3) ◽  
pp. 552-561 ◽  
Author(s):  
Zhijiang He ◽  
Bogdan I. Epureanu ◽  
Christophe Pierre
Keyword(s):  
Coupling Effects ◽  
Bladed Disks ◽  
Structural Coupling

ESO-ELT: structural coupling effects between main structure and hosted Units

2020 ◽  
Author(s):  
Pablo Zuluaga-Ramírez ◽  
Franz Koch ◽  
Michael Müller ◽  
Babak Sedghi ◽  
Michael Esselborn
Keyword(s):  
Coupling Effects ◽  
Structural Coupling ◽  
Main Structure

scholarly journals An Experimental Investigation of Vibration Localization in Bladed Disks: Part II — Forced Response

1997 ◽  
Author(s):  
Marlin J. Kruse ◽  
Christophe Pierre
Keyword(s):  
Experimental Investigation ◽  
Forced Response ◽  
Mode Shapes ◽  
Bladed Disks ◽  
Structural Coupling ◽  
Vibration Localization ◽  
Bladed Disk ◽  
Engine Order ◽  
Localized Mode ◽  
The Impact

The results of an experimental investigation on the effects of random blade mistuning on the forced dynamic response of bladed disks are reported. Two experimental specimens are considered: a nominally periodic twelve-bladed disk with equal blade lengths, and the corresponding mistuned bladed disk, which features slightly different blades of random lengths. Both specimens are subject to traveling-wave excitations delivered by piezo-electric actuators. The primary aim of the experiment is to demonstrate the occurrence of an increase in forced response blade amplitudes due to mistuning, and to verify analytical predictions about the magnitude of these increases. In particular, the impact of localized mode shapes, engine order excitation, and disk structural coupling on the sensitivity of forced response amplitudes to blade mistuning is reported. This work reports one of the first systematic experiments carried out to demonstrate and quantify the effect of mistuning on the forced response of bladed disks.

Magnetism and Its Structural Coupling Effects in 2D Ising Ferromagnetic Insulator VI3

Nano Letters ◽  
2021 ◽  
Author(s):  
Zhong Lin ◽  
Bevin Huang ◽  
Kyle Hwangbo ◽  
Qianni Jiang ◽  
Qi Zhang ◽  
...  
Keyword(s):  
Coupling Effects ◽  
Structural Coupling

On the Effects of Blade-Disk Interface Mistuning on the Response of Integrated Bladed Rotors

2013 ◽  
Author(s):  
Javier Avalos ◽  
Raghavendra Murthy ◽  
X. Q. Wang ◽  
Marc P. Mignolet
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Stiffness Matrix ◽  
Element Model ◽  
Nonparametric Modeling ◽  
Bladed Disks ◽  
Structural Coupling ◽  
Disk Interface ◽  
Mass Matrices ◽  
Significant Attention

The response of blades in bladed disks can be represented as a sum of modal contributions from their cantilevered modes and a component induced by the motion of the disk and its interface with the blades. This last contribution referred to here as the disk-induced blade motions is generally considered to be tuned when performing mistuning analysis of bladed disks. Yet, as most of the blade properties, its structural coupling to the disk is likely to be uncertain, for example due to variations in thickness at the blade filet. One thus expects a mistuning of the interface stiffness and mass matrices in particular. The effect of this mistuning on the blade response, which does not appear to have received significant attention, is the focus of the present investigation. A Craig-Bampton methodology is introduced to highlight the disk-blade interface and a mistuning modeling of its stiffness matrix is introduced following the nonparametric modeling method. The analysis with various mistuning models is carried out on a 15-blade impeller finite element model at several resonances. It is found that a small mistuning of the disk-induced blade does not alter notably the mistuned response of the blades.

Scattering and coupling effects of electromagnetic waves in 3D networks of spheres

1998 ◽  
Vol 1 (1) ◽  
pp. 45-52 ◽  
Author(s):  
M. Defos du Rau ◽  
F. Pessan ◽  
G. Ruffie ◽  
V. Vignéras-Lefebvre ◽  
J. P. Parneix
Keyword(s):  
Electromagnetic Waves ◽  
Coupling Effects ◽  
3D Networks
Sign in / Sign up

Export Citation Format

Share Document