Modal Properties of Rotating Shafts with Order-Tuned Absorbers

2014 ◽  
pp. 181-189
Author(s):  
Steven W. Shaw ◽  
Mustafa Ali Acar ◽  
Brian F. Feeny ◽  
Bruce K. Geist
Keyword(s):  
Modal Properties ◽  
Rotating Shafts

INVESTIGATIONS ON CHANGES IN MODAL PROPERTIES CAUSED BY DAMAGES ON A REAL STEEL PLATE GIRDER BRIDGE

2018 ◽  
Vol 74 (2) ◽  
pp. I_513-I_522 ◽  
Author(s):  
Takuya MIMASU ◽  
Chul-Woo KIM ◽  
Yoshinao GOI ◽  
Gen HAYASHI
Keyword(s):  
Steel Plate ◽  
Modal Properties ◽  
Girder Bridge ◽  
Plate Girder

Bisynchronous Torsional Vibrations in Rotating Shafts

1987 ◽  
Vol 54 (4) ◽  
pp. 893-897 ◽  
Author(s):  
O. Bernasconi
Keyword(s):  
Angular Momentum ◽  
Nonlinear Term ◽  
Rotation Frequency ◽  
Longitudinal Component ◽  
Torsional Vibrations ◽  
Rotating Shaft ◽  
Rotating Shafts

In this study, the intrinsic behavior of rotating shafts with residual unbalance is considered. The longitudinal component of the angular momentum caused by synchronous precession (whirling) induces torsional vibrations with a frequency of twice the rotation frequency (bisynchronous). The nonlinear term which represents this coupling is characteristic of the asymmetrical aspect of rotating shaft kinematics. This result has been obtained analytically and confirmed experimentally.

scholarly journals Theoretical Analysis of Terahertz Dielectric–Loaded Graphene Waveguide

Nanomaterials ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 210
Author(s):  
Da Teng ◽  
Kai Wang
Keyword(s):  
Photonic Devices ◽  
Effective Index ◽  
The Finite Element Method ◽  
Index Method ◽  
Modal Properties ◽  
Terahertz Region ◽  
Effective Index Method ◽  
Integration Density ◽  
Device Integration ◽  
Potential Applications

The waveguiding of terahertz surface plasmons by a GaAs strip-loaded graphene waveguide is investigated based on the effective-index method and the finite element method. Modal properties of the effective mode index, modal loss, and cut-off characteristics of higher order modes are investigated. By modulating the Fermi level, the modal properties of the fundamental mode could be adjusted. The accuracy of the effective-index method is verified by a comparison between the analytical results and numerical simulations. Besides the modal properties, the crosstalk between the adjacent waveguides, which determines the device integration density, is studied. The findings show that the effective-index method is highly valid for analyzing dielectric-loaded graphene plasmon waveguides in the terahertz region and may have potential applications in subwavelength tunable integrated photonic devices.

Modal properties of macaw palm fruit-rachilla system: An approach by the stochastic finite element method (SFEM)

2021 ◽  
Vol 184 ◽  
pp. 106099
Author(s):  
Fábio Lúcio Santos ◽  
Francisco Scinocca ◽  
Deisenara de Siqueira Marques ◽  
Nara Silveira Velloso ◽  
Flora Maria de Melo Villar
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Stochastic Finite Element Method ◽  
Stochastic Finite Element ◽  
Palm Fruit ◽  
Modal Properties ◽  
Macaw Palm ◽  
Element Method

New method to estimate bedrock shape of small-scale basin using modal properties of sediment

2021 ◽  
Vol 149 ◽  
pp. 106882
Author(s):  
Yusuke Suzuki ◽  
Kahori Iiyama ◽  
Hitoshi Morikawa ◽  
Kimitoshi Sakai ◽  
Go Araki
Keyword(s):  
New Method ◽  
Small Scale ◽  
Modal Properties

Dynamic stability of rotating shafts

1981 ◽  
Vol 50 (1) ◽  
pp. 41-48 ◽  
Author(s):  
A. Tylikowski
Keyword(s):  
Dynamic Stability ◽  
Rotating Shafts
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