FOUNDATION FOR PRIMARY AIR FAN OF SPEED 1490 RPM - STUDY OF DYNAMIC BEHAVIOR

Volume 6, Issue 1, February 2021     |     PP. 1-14      |     PDF (5571 K)    |     Pub. Date: October 24, 2021
DOI: 10.54647/cebc56061    78 Downloads     5885 Views  

Author(s)

Nulu Reddeppa, Ph.D. Scholar, Dept. of Civil Engineering, JNTUA, Anantapuramu, Andhra Pradesh, India
B Jayarami Reddy, Head of the department, Dept. of Civil Engineering, YSR Engineering. College of YVU, Proddatur, Andhra Pradesh, India
H Sudarsana Rao, Professor, Dept. of Civil Engineering, JNTUA, Anantapuramu, Andhra Pradesh, India

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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