Determination of electrodynamic parameters of materials over a wide frequency range

1997 ◽  
Vol 40 (9) ◽  
pp. 827-832
Author(s):  
B. V. Skvortsov ◽  
E. A. Zaboinikov ◽  
I. R. Vasil'ev
Keyword(s):  
Wide Frequency Range ◽  
Frequency Range

Prediction of Turbomachinery Aeroelastic Behavior From a Set of Representative Modes

2011 ◽  
Author(s):  
Mari´a A. Mayorca ◽  
Damian M. Vogt ◽  
Hans Ma˚rtensson ◽  
Torsten H. Fransson
Keyword(s):  
Wide Frequency Range ◽  
Least Square ◽  
Mode Shapes ◽  
Frequency Range ◽  
Reduced Order ◽  
Transonic Compressor ◽  
Unsteady Aerodynamic ◽  
Shape Perturbation ◽  
Selection Of

A method is proposed for the determination of the aeroelastic behavior of a system responding to mode-shapes different to the tuned in-vacuo ones, due to mistuning, mode family interaction or any other source of mode-shape perturbation. The method is based on the generation of a data base of unsteady aerodynamic forces arising from the motion of arbitrary modes and uses Least Square approximations for the prediction of any responding mode. The use of a reduced order technique allows for mistuning analyses and is also applied for the selection of a limited number of arbitrary modes. The application on a transonic compressor blade shows that the method captures well the aeroelastic properties in a wide frequency range. A discussion of the influence of the mode-shapes and frequency on the final stability response is also provided.

Prediction of Turbomachinery Aeroelastic Behavior From a Set of Representative Modes

2012 ◽  
Vol 135 (1) ◽  
Author(s):  
María A. Mayorca ◽  
Damian M. Vogt ◽  
Hans Mårtensson ◽  
Torsten H. Fransson
Keyword(s):  
Wide Frequency Range ◽  
Least Square ◽  
Mode Shapes ◽  
Frequency Range ◽  
Reduced Order ◽  
Transonic Compressor ◽  
Unsteady Aerodynamic ◽  
Shape Perturbation ◽  
Selection Of

A method is proposed for the determination of the aeroelastic behavior of a system responding to mode-shapes which are different from the tuned in vacuo ones, due to mistuning, mode family interaction, or any other source of mode-shape perturbation. The method is based on the generation of a data base of unsteady aerodynamic forces arising from the motion of arbitrary modes and uses least square approximations for the prediction of any responding mode. The use of a reduced order technique allows for mistuning analyses and is also applied for the selection of a limited number of arbitrary modes. The application of this method on a transonic compressor blade shows that the method captures the aeroelastic properties well in a wide frequency range. A discussion of the influence of the mode-shapes and frequency on the final stability response is also provided.

scholarly journals IMPROVEMENT GENERATING OF THE TEST SIGNALS FOR DETERMINATION OF THE IMPEDANCE PARAMETERS IN WIDE FREQUENCY RANGE

2020 ◽  
Vol 17 (2) ◽  
pp. 60-72 ◽  
Author(s):  
В. Г. Мельник ◽  
П. І. Борщов ◽  
В. К. Бєляєв ◽  
О. Д. Василенко ◽  
О. Л. Ламеко ◽  
...  
Keyword(s):  
Wide Frequency Range ◽  
Frequency Range ◽  
Impedance Parameters
Sign in / Sign up

Export Citation Format

Share Document