DEVELOPMENT OF MAFVRO TO RANDOMLY EXCITED VIBRATION SYSTEMS TO DERIVE THE NATURAL FREQUENCIES AND MODE SHAPES

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REZAEE MOUSA; FATTAHI GHOLAMREZA

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Journal: JOURNAL OF SOLID AND FLUID MECHANICS Year:2015 | Volume:5 | Issue:2 Page(s): 71-81

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Title

DEVELOPMENT OF MAFVRO TO RANDOMLY EXCITED VIBRATION SYSTEMS TO DERIVE THE NATURAL FREQUENCIES AND MODE SHAPES

Author(s)

REZAEE MOUSA | FATTAHI GHOLAMREZA | Issue Writer Certificate

Keywords

DAMPED VIBRATION SYSTEMQ2

MODAL ANALYSISQ2

THE STRUCTURAL EIGENVALUE PROBLEMQ2

INITIAL EXCITATIONQ2

RANDOM EXCITATIONQ2

Abstract

MAFVRO is one of the out-put only MODAL ANALYSIS methods which is able to determine the modal parameters of a vibration system through the free vibration responses. It is worth to note that most of the vibration systems are subjected to RANDOM EXCITATIONs. Therefore, in such cases, the traditional MAFVRO cannot extract the modal parameters. In this study, the mentioned method is developed to randomly excited vibration systems. Then, the modified MAFVRO is applied to a randomly excited vibration system. The RANDOM EXCITATION has been considered as a set of white noises which are applied to all masses of a discrete system. Then by employing the developed method, the estimated results have been compared with those obtained through THE STRUCTURAL EIGENVALUE PROBLEM. Comparing the results reveals that the developed method can give the natural frequencies and mode shapes of a randomly excited system with a good accuracy, but it estimates the damping ratios lower than their exact values. In addition, the effect of the noise on the accuracy of the estimated modal parameters have been investigated.

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APA: Copy

REZAEE, MOUSA, & FATTAHI, GHOLAMREZA. (2015). DEVELOPMENT OF MAFVRO TO RANDOMLY EXCITED VIBRATION SYSTEMS TO DERIVE THE NATURAL FREQUENCIES AND MODE SHAPES. JOURNAL OF SOLID AND FLUID MECHANICS, 5(2), 71-81. SID. https://sid.ir/paper/212852/en

Vancouver: Copy

REZAEE MOUSA, FATTAHI GHOLAMREZA. DEVELOPMENT OF MAFVRO TO RANDOMLY EXCITED VIBRATION SYSTEMS TO DERIVE THE NATURAL FREQUENCIES AND MODE SHAPES. JOURNAL OF SOLID AND FLUID MECHANICS[Internet]. 2015;5(2):71-81. Available from: https://sid.ir/paper/212852/en

IEEE: Copy

MOUSA REZAEE, and GHOLAMREZA FATTAHI, “DEVELOPMENT OF MAFVRO TO RANDOMLY EXCITED VIBRATION SYSTEMS TO DERIVE THE NATURAL FREQUENCIES AND MODE SHAPES,” JOURNAL OF SOLID AND FLUID MECHANICS, vol. 5, no. 2, pp. 71–81, 2015, [Online]. Available: https://sid.ir/paper/212852/en

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