APPLICATION OF WHITE NOISE EXCITATION FOR INVESTIGATION AND COMPARING THE DYNAMIC CHARACTERISTICS OF CASTELLATED AND PLAIN-WEBBED BEAMS

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LOTFOLLAHI YAGHIN MOHAMMAD ALI; AHMADI HAMID

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Journal: STRUCTURE AND STEEL Year:2011 | Volume:6 | Issue:8 Page(s): 49-60

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Title

APPLICATION OF WHITE NOISE EXCITATION FOR INVESTIGATION AND COMPARING THE DYNAMIC CHARACTERISTICS OF CASTELLATED AND PLAIN-WEBBED BEAMS

Author(s)

LOTFOLLAHI YAGHIN MOHAMMAD ALI | AHMADI HAMID | Issue Writer Certificate

Keywords

CASTELLATED BEAMQ2

SIMPLY SUPPORTED BEAMQ3

MODAL ANALYSISQ3

RESPONSE SPECTRUMQ3

WHITE NOISEQ2

PSDQ3

Abstract

In the present paper, dynamic characteristics of CASTELLATED BEAMs are investigated and compared with the plain-webbed ones. Firstly, using the FEM-based software package ANSYS, modal analyses are performed on plain-webbed and castellated SIMPLY SUPPORTED BEAMs. The mode shapes are extracted and discussed. Afterwards, during a frequency-domain analysis, a WHITE NOISE dynamic load with an appropriate frequency range is applied to both plain-webbed and CASTELLATED BEAMs and their dynamic behaviors are studied through extracting the power spectral densities (PSDs) of various structural responses. The effect of full and local lateral bracing of the beams is considered in the present study. It can be concluded that the loading pattern is a critical factor in investigating the dynamic properties of simply supported CASTELLATED BEAMs. For example, when a uniformly distributed load having WHITE NOISE characteristics is applied to the whole length of the beam, some mode shapes can not be detected.However, when the same load is exerted on the half of the beam length, all mode shapes appear in the PSD of the acceleration response.

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APA: Copy

LOTFOLLAHI YAGHIN, MOHAMMAD ALI, & AHMADI, HAMID. (2011). APPLICATION OF WHITE NOISE EXCITATION FOR INVESTIGATION AND COMPARING THE DYNAMIC CHARACTERISTICS OF CASTELLATED AND PLAIN-WEBBED BEAMS. STRUCTURE AND STEEL, 6(8), 49-60. SID. https://sid.ir/paper/136629/en

Vancouver: Copy

LOTFOLLAHI YAGHIN MOHAMMAD ALI, AHMADI HAMID. APPLICATION OF WHITE NOISE EXCITATION FOR INVESTIGATION AND COMPARING THE DYNAMIC CHARACTERISTICS OF CASTELLATED AND PLAIN-WEBBED BEAMS. STRUCTURE AND STEEL[Internet]. 2011;6(8):49-60. Available from: https://sid.ir/paper/136629/en

IEEE: Copy

MOHAMMAD ALI LOTFOLLAHI YAGHIN, and HAMID AHMADI, “APPLICATION OF WHITE NOISE EXCITATION FOR INVESTIGATION AND COMPARING THE DYNAMIC CHARACTERISTICS OF CASTELLATED AND PLAIN-WEBBED BEAMS,” STRUCTURE AND STEEL, vol. 6, no. 8, pp. 49–60, 2011, [Online]. Available: https://sid.ir/paper/136629/en

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