Experimental evaluation of various Operational Modal Analysis methods in the presence of simultaneous random and harmonic force excitation

Q: How can I download an article?

To download an article from SID, first log in to the site, search for the article title, and click on the 'Download Article' option.

Q: How can I download an ISI article?

To download an ISI article on SID, enter the keyword or article title in the search bar, view the relevant results, click on the desired article, and select the 'Download Article' option.

Q: How can I access the SID database?

To access the SID database, visit SID.ir, create an account, and log in to access scientific resources.

Q: Is downloading articles from SID free?

Some articles on SID are available for free, while others require payment. Details are specified on the article's page.

SALEHI MEHDI; Orak Mohamad; GHORBANI MAHDI; Ahmadi balootaki Mohammad

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Journal Paper

Paper Information

Journal: IRANIAN JOURNAL OF MECHANICAL ENGINEERING (ENGLISH) Year:2018 | Volume:20 | Issue:2 Page(s): 54-71

Download Full-Text

Persian Verion

View:

475

Download:

Cites:

Information Journal Paper

Title

Experimental evaluation of various Operational Modal Analysis methods in the presence of simultaneous random and harmonic force excitation

Author(s)

SALEHI MEHDI | Orak Mohamad | GHORBANI MAHDI | Ahmadi balootaki Mohammad | Issue Writer Certificate

Keywords

Operational Modal AnalysisQ1

Harmonic ComponentQ1

Modal ParametersQ2

Frequency DomainQ2

Abstract

In the present research, performance of Harmonic Components identification and elimination techniques in practical operational modal data is investigated. Firstly, classical modal testing has been carried out on a cantilever steel beam and modal data are extracted. Four bending modes were available in the frequency band of interest. Afterwards, the same structure underwent operational modal tests with simultaneous random and harmonic excitation forces. In OMA, measurement data obtained from the operational responses are used to estimate the parameters of models that describe the system behavior. Extracted Modal Parameters from these data compared with baseline parameters. Extraction of Modal Parameters from operational data was fulfilled through different common OMA techniques. Each set of obtained results was evaluated in comparison with reference results. Accuracy and capability of each method in eliminating spurious modes caused by harmonic input components have been studied. For data analysis, in addition to developed MATLAB codes, commercial software of PULSE has been utilized in parallel as a tool for verification. The results of this survey demonstrate that the accuracy of the Stochastic Subspace Identification method is higher compared to Frequency Domain Decomposition and Enhanced Frequency Domain Decomposition methods. However, when the system has low modal damping, Frequency Domain Decomposition methods provide better estimates.

Cites

No record.

References

No record.

Cite

APA: Copy

SALEHI, MEHDI, Orak, Mohamad, GHORBANI, MAHDI, & Ahmadi balootaki, Mohammad. (2018). Experimental evaluation of various Operational Modal Analysis methods in the presence of simultaneous random and harmonic force excitation. JOURNAL OF MECHANICAL ENGINEERING (ISME) (IRANIAN JOURNAL OF MECHANICAL ENGINEERING-ENGLISH), 20(2 ), 54-71. SID. https://sid.ir/paper/83573/en

Vancouver: Copy

SALEHI MEHDI, Orak Mohamad, GHORBANI MAHDI, Ahmadi balootaki Mohammad. Experimental evaluation of various Operational Modal Analysis methods in the presence of simultaneous random and harmonic force excitation. JOURNAL OF MECHANICAL ENGINEERING (ISME) (IRANIAN JOURNAL OF MECHANICAL ENGINEERING-ENGLISH)[Internet]. 2018;20(2 ):54-71. Available from: https://sid.ir/paper/83573/en

IEEE: Copy

MEHDI SALEHI, Mohamad Orak, MAHDI GHORBANI, and Mohammad Ahmadi balootaki, “Experimental evaluation of various Operational Modal Analysis methods in the presence of simultaneous random and harmonic force excitation,” JOURNAL OF MECHANICAL ENGINEERING (ISME) (IRANIAN JOURNAL OF MECHANICAL ENGINEERING-ENGLISH), vol. 20, no. 2 , pp. 54–71, 2018, [Online]. Available: https://sid.ir/paper/83573/en

Related Journal Papers