contributor author | Wei Liu | |
contributor author | Wei-cheng Gao | |
contributor author | Yi Sun | |
date accessioned | 2017-05-09T00:36:01Z | |
date available | 2017-05-09T00:36:01Z | |
date copyright | June, 2009 | |
date issued | 2009 | |
identifier issn | 1048-9002 | |
identifier other | JVACEK-28900#034503_1.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/142290 | |
description abstract | Modal identification with output-only measurements plays a key role in vibration-based damage detection, model updating, and structural health monitoring in civil engineering. This paper addresses the application of modal identification method to a triangle steel tube truss natatorium using the field measurement data. To obtain dynamic characteristics of the spatial structure, four different output-only system identification methods are employed. They are natural excitation technique–eigensystem realization algorithm, data-driven stochastic subspace identification method, frequency-domain decomposition/frequency-spatial domain decomposition method, and half spectra/rational fractional orthogonal polynomial method. First an analytical modal analysis was performed on the three-dimensional finite element model according to the factual layout design to obtain the calculated frequencies and mode shapes. Then the whole procedure of the field vibration tests on the natatorium was presented. Finally, practical issues and efficiency of the four output-only modal identification techniques are investigated, and compared with the results from a finite element model. The system identification results demonstrate that both methods can provide reliable information on dynamic characteristics of the spatial structure. The frequency-domain methods, however, can quickly identify the modal parameters, but the leakage error introduced by power-spectral density estimation is existent due to the limited length of data. And the time-domain methods can avoid the leakage error, but the computational modes and the computational cost are the main two drawbacks in application. The conclusion is that several system identification methods should be consulted to ensure the accuracy of the estimated modal parameters. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Application of Modal Identification Methods to Spatial Structure Using Field Measurement Data | |
type | Journal Paper | |
journal volume | 131 | |
journal issue | 3 | |
journal title | Journal of Vibration and Acoustics | |
identifier doi | 10.1115/1.3085881 | |
journal fristpage | 34503 | |
identifier eissn | 1528-8927 | |
keywords | Density | |
keywords | Spectra (Spectroscopy) | |
keywords | Steel | |
keywords | Trusses (Building) | |
keywords | Finite element methods | |
keywords | Vibration tests | |
keywords | Algorithms | |
keywords | Vibration | |
keywords | Finite element model | |
keywords | Frequency | |
keywords | Shapes | |
keywords | Errors | |
keywords | Polynomials | |
keywords | Eigenvalues | |
keywords | Measurement | |
keywords | Functions AND Structural health monitoring | |
tree | Journal of Vibration and Acoustics:;2009:;volume( 131 ):;issue: 003 | |
contenttype | Fulltext | |