A Full-Field Non-Contact Thermal Modal Testing Technique Under Ambient Excitation

2021 ◽  
Author(s):  
Y. J. Hu ◽  
Z. S. Huang ◽  
W. D. Zhu ◽  
H. L. Li
Keyword(s):  
Modal Testing ◽  
Testing Technique ◽  
Full Field ◽  
Ambient Excitation

A Multi-step Interpolated-FFT procedure for full-field nonlinear modal testing of turbomachinery components

2022 ◽  
Vol 169 ◽  
pp. 108771
Author(s):  
Xing Wang ◽  
Michal Szydlowski ◽  
Jie Yuan ◽  
Christoph Schwingshackl
Keyword(s):  
Modal Testing ◽  
Full Field

scholarly journals A modified complex modal testing technique for a rotating tire with a flexible ring model

2015 ◽  
Vol 60-61 ◽  
pp. 604-618 ◽  
Author(s):  
Jongsuh Lee ◽  
Semyung Wang ◽  
Bert Pluymers ◽  
Wim Desmet ◽  
Peter Kindt
Keyword(s):  
Modal Testing ◽  
Testing Technique ◽  
Ring Model ◽  
Flexible Ring ◽  
Complex Modal

scholarly journals THE TRANSFER MATRIX METHOD FOR MODAL ANALYSIS OF CRACKED MULTISTEP BEAM

2017 ◽  
Vol 55 (5) ◽  
pp. 598
Author(s):  
Nguyen Tien Khiem ◽  
Vu Thi An Ninh ◽  
Tran Thanh Hai
Keyword(s):  
Modal Analysis ◽  
Transfer Matrix ◽  
Transfer Matrix Method ◽  
Arbitrary Number ◽  
Matrix Method ◽  
Crack Detection ◽  
Natural Frequencies ◽  
Modal Testing ◽  
Testing Technique

The present study addresses the modal analysis of multistep beam with arbitrary number of cracks by using the transfer matrix method and modal testing technique. First, there is conducted general solution of free vibration problem for uniform beam element with arbitrary number of cracks that allows one to simplify the transfer matrix for cracked multistep beam. The transferring beam state needs to undertake only at the steps of beam but not through crack positions. Such simplified the transfer matrix method makes straightforward to investigate effect of cracks mutually with cross-section step in beam on natural frequencies. It is revealed that step-down and step-up in beam could modify notably sensitivity of natural frequencies to crack so that the analysis provides useful indication for crack detection in multistep beam. The proposed theory was validated by an experimental case study

scholarly journals Adaptive Noise Cancellation System for Low Frequency Transmission of Sound in Open Fan Aircraft

2013 ◽  
Vol 20 (5) ◽  
pp. 989-1000 ◽  
Author(s):  
Steven Griffin ◽  
Adam Weston ◽  
Jeff Anderson
Keyword(s):  
Low Frequency ◽  
Noise Cancellation ◽  
Modal Testing ◽  
Acoustic Model ◽  
Adaptive Noise Cancellation ◽  
Testing Technique ◽  
Sensor Actuator ◽  
Adaptive Noise ◽  
Structural Acoustic Model ◽  
Large Aircraft

This paper describes the use of a structural/acoustic model of a section of a large aircraft to help define the sensor/actuator architecture that was used in a hardware demonstration of adaptive noise cancellation. Disturbances considered were representative of propeller-induced disturbances from an open fan aircraft. Controller on and controller off results from a hardware demonstration on a portion of a large aircraft are also included. The use of the model has facilitated the development of a new testing technique, closely related to modal testing, that can be used to find good structural actuator locations for adaptive noise cancellation.

Holography as a quantitative modal testing technique applied to a brake drum in view of correlation with FE data

1996 ◽  
Author(s):  
Benoit Dierckx ◽  
Hermann Klingele ◽  
Herman Van der Auweraer ◽  
Jan Leuridan
Keyword(s):  
Modal Testing ◽  
Testing Technique ◽  
Brake Drum

scholarly journals Output-only full-field modal testing

2017 ◽  
Vol 199 ◽  
pp. 423-428 ◽  
Author(s):  
Yen-Hao Chang ◽  
Weizhuo Wang ◽  
Eann A. Patterson ◽  
Jen-Yuan Chang ◽  
John E. Mottershead
Keyword(s):  
Modal Testing ◽  
Full Field ◽  
Output Only
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