scholarly journals Comparison and application of two time domain methods analysis to modal parameter identification of Songhuajiang River highway-railway bridge

2020 ◽  
Vol 892 ◽  
pp. 012035
Author(s):  
Bo Jin ◽  
Chuankai Zhu ◽  
Kunyang Yu ◽  
Zhongwei Li ◽  
Yu Bai
Keyword(s):  
Parameter Identification ◽  
Time Domain ◽  
Railway Bridge ◽  
Modal Parameter ◽  
Modal Parameter Identification

Study of Time-Domain Techniques for Modal Parameter Identification of a Long Suspension Bridge with Dense Sensor Arrays

2009 ◽  
Vol 135 (7) ◽  
pp. 669-683 ◽  
Author(s):  
Reza D. Nayeri ◽  
Farzad Tasbihgoo ◽  
Mazen Wahbeh ◽  
John P. Caffrey ◽  
Sami F. Masri ◽  
...  
Keyword(s):  
Parameter Identification ◽  
Time Domain ◽  
Sensor Arrays ◽  
Suspension Bridge ◽  
Modal Parameter ◽  
Modal Parameter Identification

scholarly journals On the Use of Weighted Least Squares for Time Domain Modal Parameter Identification

2004 ◽  
Vol 11 (3-4) ◽  
pp. 457-465 ◽  
Author(s):  
Jonathan E. Cooper
Keyword(s):  
Parameter Identification ◽  
Least Squares ◽  
Time Domain ◽  
Least Squares Method ◽  
Weighted Least Squares ◽  
Computational Effort ◽  
High Signal ◽  
Modal Parameter ◽  
Modal Parameter Identification ◽  
Wide Range

An approach for the use of the Weighted Least Squares method for time domain modal parameter identification is introduced. The approach enables standard identification methods to be employed in the usual manner, except that sections of the time records with high signal-noise ratios are given a greater emphasis in the identification process. It is shown how it is possible to apply the method to a wide range of applications, including the analysis of impulse response, input-output and time varying data. A number of different weighting schemes are explored, based upon exponential weighting and the envelope of the measured data. A series of simulated tests demonstrate how the performance of conventional time domain algorithms can be improved significantly with little extra computational effort though the use of a Weighted Least Squares scheme.

Structural Modal Parameter Identification Based on Natural Excitation Technique

2013 ◽  
Vol 859 ◽  
pp. 167-170
Author(s):  
Qiang Pei ◽  
Long Li
Keyword(s):  
Parameter Identification ◽  
Time Domain ◽  
Structural Parameters ◽  
Engineering Practice ◽  
Modal Parameter ◽  
Modal Parameter Identification ◽  
Response Data ◽  
Exponential Method ◽  
Time Series Method ◽  
Natural Excitation Technique

Natural excitation technique has found an increasingly wide utilization in civil engineering field. Modal parameter identification in time domain method can identify the structural parameters in the use of impulse response data as input data. The theory of NExT method is presented. By constructing a numerical simulation example under white-noise excitation, and calculating the data by NExT method, the modal parameters can be identified according to complex exponential method and time series-method in time domain. The results and analysis indicate the validity of the method and provide a reference for engineering practice.

Modal parameter identification of an electrical submersible pump using impact test and time domain methods

2018 ◽  
Vol 13 (1) ◽  
pp. 55-62
Author(s):  
M. A. Castillo ◽  
A. C. Troyman ◽  
R. H. Gutiérrez ◽  
L. A. Vaz ◽  
U. A. Monteiro ◽  
...  
Keyword(s):  
Parameter Identification ◽  
Time Domain ◽  
Impact Test ◽  
Submersible Pump ◽  
Modal Parameter ◽  
Modal Parameter Identification ◽  
Electrical Submersible Pump
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