scholarly journals Substructuring of Viscoelastic Subcomponents with Interface Reduction

2017 ◽  
pp. 17-27 ◽  
Author(s):  
Robert J. Kuether ◽  
Kevin L. Troyer
Keyword(s):  
Interface Reduction

Interface Reduction in Craig-Bampton Component Mode Synthesis by Orthogonal Polynomial Series

2017 ◽  
Author(s):  
Luigi Carassale ◽  
Mirko Maurici
Keyword(s):  
Degrees Of Freedom ◽  
Axial Compressor ◽  
Component Mode Synthesis ◽  
Reduction Techniques ◽  
Interface Reduction ◽  
Reduction Methods ◽  
Interface Displacement ◽  
Polynomial Series ◽  
Efficient Representation

The component mode synthesis based on the Craig-Bampton method has two strong limitations that appear when the number of the interface degrees of freedom is large. First, the reduced-order model obtained is overweighed by many unnecessary degrees of freedom. Second, the reduction step may become extremely time consuming. Several interface reduction techniques addressed successfully the former problem, while the latter remains open. In this paper we tackle this latter problem through a simple interface-reduction technique based on an a-priory choice of the interface modes. An efficient representation of the interface displacement field is achieved adopting a set of orthogonal basis functions determined by the interface geometry. The proposed method is compared with other existing interface reduction methods on a case study regarding a rotor blade of an axial compressor.

scholarly journals Interface reduction for Hurty/Craig-Bampton substructured models: Review and improvements

2019 ◽  
Vol 114 ◽  
pp. 579-603 ◽  
Author(s):  
Dimitri Krattiger ◽  
Long Wu ◽  
Martin Zacharczuk ◽  
Martin Buck ◽  
Robert J. Kuether ◽  
...  
Keyword(s):  
Interface Reduction

scholarly journals On Hurty/Craig-Bampton Substructuring With Interface Reduction on Contacting Surfaces

2017 ◽  
Author(s):  
Robert J. Kuether ◽  
Peter B. Coffin ◽  
Adam R. Brink
Keyword(s):  
Degrees Of Freedom ◽  
Local Level ◽  
Cost Savings ◽  
Synthesis Methods ◽  
Finite Element Models ◽  
Interface Reduction ◽  
Restoring Forces ◽  
Fixed Interface ◽  
The Cost ◽  
Dynamics Models

Structural dynamics models with localized nonlinearities can be reduced using Hurty/Craig-Bampton component mode synthesis methods. The interior degrees-of-freedom of the linear subcomponents are reduced with a set of dynamic fixed-interface modes while the static constraint modes preserve the physical coordinates at which the nonlinear restoring forces are applied. For finite element models with a highly refined mesh at the boundary, a secondary modal analysis can be performed to reduce the interface down to a truncated set of local-level characteristic constraint modes. In this research, the cost savings and accuracy of the interface reduction technique are evaluated on a simple example problem involving two elastic blocks coming into contact.

scholarly journals Exploring the mineral–water interface: reduction and reaction kinetics of single hematite (α-Fe2O3) nanoparticles

2016 ◽  
Vol 7 (2) ◽  
pp. 1408-1414 ◽  
Author(s):  
K. Shimizu ◽  
K. Tschulik ◽  
R. G. Compton
Keyword(s):  
Reaction Kinetics ◽  
Mineral Water ◽  
Reductive Dissolution ◽  
Particle Impact ◽  
Water Interface ◽  
Fe2o3 Nanoparticles ◽  
Kinetics And Thermodynamics ◽  
Interface Reduction ◽  
Kinetics Of

Here we show that particle impact chronoamperometry allows the quantitative electrochemical characterization of individual mineral nanoparticles with adequate proton concentrations. Through this approach, we extract the kinetics and thermodynamics of the reductive dissolution of single hematite (α-Fe2O3) nanoparticles.

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