Viscoelastic Composites for Passive Damping of Structural Vibration

2021 ◽  
pp. 221-250
Author(s):  
Satyajit Panda ◽  
Abhay Gupta ◽  
Rajidi Shashidhar Reddy
Keyword(s):  
Structural Vibration ◽  
Passive Damping ◽  
Viscoelastic Composites

Use of shunted shear-mode piezoceramics for structural vibration passive damping

2006 ◽  
Vol 84 (22-23) ◽  
pp. 1415-1425 ◽  
Author(s):  
Ayech Benjeddou ◽  
Julie-Anne Ranger
Keyword(s):  
Structural Vibration ◽  
Shear Mode ◽  
Passive Damping

scholarly journals Analysis of a Linear Model for Non-Synchronous Vibrations Near Stall

2021 ◽  
Vol 6 (3) ◽  
pp. 26
Author(s):  
Christoph Brandstetter ◽  
Sina Stapelfeldt
Keyword(s):  
Linear Model ◽  
Linear Models ◽  
Structural Vibration ◽  
Experimental Investigations ◽  
Vibration Modes ◽  
Critical Problem ◽  
Safety Critical ◽  
Unstable Vibration ◽  
Aero Engines ◽  
Lock In

Non-synchronous vibrations arising near the stall boundary of compressors are a recurring and potentially safety-critical problem in modern aero-engines. Recent numerical and experimental investigations have shown that these vibrations are caused by the lock-in of circumferentially convected aerodynamic disturbances and structural vibration modes, and that it is possible to predict unstable vibration modes using coupled linear models. This paper aims to further investigate non-synchronous vibrations by casting a reduced model for NSV in the frequency domain and analysing stability for a range of parameters. It is shown how, and why, under certain conditions linear models are able to capture a phenomenon, which has traditionally been associated with aerodynamic non-linearities. The formulation clearly highlights the differences between convective non-synchronous vibrations and flutter and identifies the modifications necessary to make quantitative predictions.

Structural vibration measurement with multiple synchronous cameras

2021 ◽  
Vol 157 ◽  
pp. 107742
Author(s):  
Roberto Del Sal ◽  
Loris Dal Bo ◽  
Emanuele Turco ◽  
Andrea Fusiello ◽  
Alessandro Zanarini ◽  
...  
Keyword(s):  
Vibration Measurement ◽  
Structural Vibration
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