scholarly journals Dynamic parameters of a RC building extracted from earthquake data using the Random Decrement Technique

2021 ◽  
Vol 664 (1) ◽  
pp. 012088
Author(s):  
Alexandru Tiganescu ◽  
Iolanda Gabriela Craifaleanu ◽  
Stefan Florin Balan
Keyword(s):  
Dynamic Parameters ◽  
Random Decrement Technique ◽  
Random Decrement ◽  
Rc Building ◽  
Earthquake Data

A Mathematical Basis for the Random Decrement Vibration Signature Analysis Technique

1982 ◽  
Vol 104 (2) ◽  
pp. 307-313 ◽  
Author(s):  
J. K. Vandiver ◽  
A. B. Dunwoody ◽  
R. B. Campbell ◽  
M. F. Cook
Keyword(s):  
Random Process ◽  
Linear Time ◽  
Signature Analysis ◽  
Gaussian Random Process ◽  
Mathematical Basis ◽  
Linear Time Invariant ◽  
Random Decrement Technique ◽  
Random Decrement ◽  
Vibration Signature ◽  
Linear Time Invariant System

The mathematical basis for the Random Decrement Technique of vibration signature analysis is established. The general relationship between the autocorrelation function of a random process and the Randomdec signature is derived. For the particular case of a linear time invariant system excited by a zero-mean, stationary, Gaussian random process, a Randomdec signature of the output is shown to be proportional to the auto-correlation of the output. Example Randomdec signatures are computed from acceleration response time histories from an offshore platform.

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