FOUNDATION FOR PRIMARY AIR FAN OF SPEED 1490 RPM - STUDY OF DYNAMIC BEHAVIOR
DOI: 10.54647/cebc56061 78 Downloads 5922 Views
Author(s)
Abstract
In general Primary Air fan (PA Fan) foundation consist of a block foundation / semi framed foundation with heavy concrete mass. Its dynamic behavior is studied using Barkan’s method by most of the engineering practitioners. This method has limitations in providing wholistic details of foundation behavior like transient stage behavior, response at specific part of the foundation etc. However, in this study a three-dimensional Finite Element model is used to study its dynamic behavior. ANSYS software is used for modeling the foundation with three-dimensional Finite Elements. Appropriate soil structure interaction is resembled with suitable elements available in ANSYS element library. Natural frequencies of the foundation system and displacement amplitudes are obtained using the above model. Mode shapes of the various modes are plotted. Foundation response for equipment startup and shut down conditions are studied by plotting displacement amplitudes w.r.t frequency variation.
Keywords
PA Fan Foundation, Harmonic Analysis, Barkan’s Method, ANSYS, Frequency
Cite this paper
Nulu Reddeppa, B Jayarami Reddy, H Sudarsana Rao,
FOUNDATION FOR PRIMARY AIR FAN OF SPEED 1490 RPM - STUDY OF DYNAMIC BEHAVIOR
, SCIREA Journal of Civil Engineering and Building Construction .
Volume 6, Issue 1, February 2021 | PP. 1-14.
10.54647/cebc56061
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