scholarly journals Modal control of vibration in rotating machines and other generally damped systems

2007 ◽  
Vol 302 (1-2) ◽  
pp. 104-116 ◽  
Author(s):  
P.R. Houlston ◽  
S.D. Garvey ◽  
A.A. Popov
Keyword(s):  
Modal Control ◽  
Rotating Machines ◽  
Damped Systems

Nonbaseband residual flexibility method of component mode synthesis for proportionally damped systems

AIAA Journal ◽  
1999 ◽  
Vol 37 ◽  
pp. 1285-1291
Author(s):  
Jeffrey A. Morgan ◽  
Christophe Pierre ◽  
Gregory M. Hulbert
Keyword(s):  
Component Mode Synthesis ◽  
Damped Systems

Active Modal Control Applying in a 2DOF Structure

2019 ◽  
Author(s):  
Edson Hideki Koroishi ◽  
Joana Pereira Repinaldo ◽  
Fabian Andres Lara-Molina ◽  
Aldemir Ap Cavalini Jr ◽  
Valder Steffen Jr
Keyword(s):  
Modal Control

Predictive Maintenance based on mechanical unbalance severity analysis of rotating machines

2017 ◽  
Author(s):  
Dionisio Martins ◽  
Thiago de Moura Prego ◽  
Amaro Lima ◽  
Douglas Hemerly ◽  
Fabrício Lopes e Silva
Keyword(s):  
Predictive Maintenance ◽  
Rotating Machines

BALANCING OF ROTATING MACHINES USING A KRIGING META-MODEL

2019 ◽  
Author(s):  
Vinícius Carvalho ◽  
Leonardo Sicchieri ◽  
Marcus Filipe Sousa Reis ◽  
Aldemir Ap Cavalini Jr ◽  
Valder Steffen Jr
Keyword(s):  
Rotating Machines ◽  
Meta Model

Optimum Design of Journal Bearings Dimensions for Rotating Machines

2020 ◽  
Vol 38 (10A) ◽  
pp. 1481-1488
Author(s):  
Tariq M. Hammza ◽  
Ehab N. Abas ◽  
Nassear R. Hmoad
Keyword(s):  
Aspect Ratio ◽  
Dynamic Response ◽  
Numerical Solution ◽  
Critical Speed ◽  
Design Method ◽  
Considerable Effect ◽  
Journal Bearings ◽  
Rotating Machines ◽  
Bearing Clearance ◽  
Study Results

The values of Many parameters which involve in the design of fluid film journal bearings mainly depend on the bearing applied load when using the conventional design method to design the journal bearings, in this study, as well as applied bearing load, the dynamic response and critical speed have been used to calculate the dimensions of journal bearings. In the field of rotating machine, especially a heavy-duty rotating machines, the critical speed and response are the main parameters that specify bearing dimensions. The bearing aspect ratio (bearing length to bore diameter) and bearing clearance have been determined based on rotor maximum critical speed and minimum response displacement. The analytical solution of rotor Eq. of motion was verified by numerical solution via using ANSYS Mechanical APDL 18.0 and by comparing the numerical solution with the preceding study. The final study results clearly showed that the bearing aspect ratio has little effect on the critical speed, but it has a high effect on the dynamic response also the bearing clearance has little effect on the critical speed and considerable effect on the dynamic response. The study showed that the more accurate values of bearing aspect ratio to make the response of rotor as low as possible are about 0.65 - 1 and bearing percent clearance is about 0.15 - 0.2 for different rotor dimensions.

Simulation of modal control liquid crystal lens with step sheet resistance distribution

2020 ◽  
Vol 35 (9) ◽  
pp. 908-913
Author(s):  
Wei-xing GONG ◽  
◽  
Tao YU ◽  
Wei-zhi WANG ◽  
Jia-lun ZHANG ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Sheet Resistance ◽  
Modal Control ◽  
Liquid Crystal Lens
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