Coal Mill Foundation – A Finite Element Approach for Study of Dynamic Analysis

Nulu Reddeppa; Bommireddy Jayarami Reddy; Hanchate Sudarsana Rao

doi:doi:10.11648/j.es.20210604.14

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Coal Mill Foundation – A Finite Element Approach for Study of Dynamic Analysis

Nulu Reddeppa, Bommireddy Jayarami Reddy, Hanchate Sudarsana Rao

Published in Engineering Science (Volume 6, Issue 4)

Received: 20 November 2021 Accepted: 14 December 2021 Published: 29 December 2021

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Abstract

In general coal mill foundation consist of a block foundation with heavy concrete mass. Its dynamic behavior is studied using Barkan’s¹ method by most of the engineering practitioners. Foundation is generally sized such that the foundation mass is about more than three times the mass of the equipment using the empirical guidelines. This method has limitations in providing wholistic details of foundation behavior like transient stage deformations and response for the exited forces, foundation response at specific areas/nodes of the foundation etc. Also, this method has got limitation in mode shapes. This method can provide only fundamental mode shapes. That is in three linear directions and three rotational directions. But in practical, Mode shapes exist with coupled directions with appropriate mass participations over and above the fundamental directions. In this study a three-dimensional Finite Element Model is used to study coal mill foundation dynamic response and it’s behavior. This approach plugs all the limitations of Barkan’s method. 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. Dynamic forces from coal mill, gear box and motor which act at different frequencies and at different planes are applied on the model at appropriate nodes. Natural frequencies of the foundation system and displacement amplitudes from the forced vibration analysis are obtained using the above model. Mode shapes of the various modes are plotted. Foundation response for equipment startup and shut down conditions (transient stages) are studied by plotting displacement amplitudes w.r.t frequency variation.

Published in	Engineering Science (Volume 6, Issue 4)
DOI	10.11648/j.es.20210604.14
Page(s)	82-99
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2021. Published by Science Publishing Group

Keywords

Coal Mill Foundation, Free Vibration Analysis, Block Foundation, Forced Vibration Analysis, ANSYS, Modes

References

[1]	Han, Y. C. 2008. Study of Vibrating Foundation Considering Soil-Pile-Structure Interaction for Practical Applications. J. of Earthquake Engineering and Engineering Vibration, Vol. 7, No. 3, 321-327.
[2]	R. Thompson, D. Wong, Boiler induced draft fan optimization, International Sugar Journal 113 (1350) (2011) 425-431.
[3]	R. J. Sayer, Structural Dynamics of Centrifugal Fans, Proceedings of the National Technical Training Symposium and 34^th Annual Meeting of the Vibration Institute, Oak Brook, IL, 2010.
[4]	K. Singleton, B. M. P. E., Case study analysis of centrifugal fan high amplitude vibration
[5]	N. Jungbluth, C. Bauer, R. Dones, R. Frischknecht, Life cycle assessment for emerging technologies: case studies for photovoltaic and wind power (11 pp), The International Journal of Life Cycle Assessment 10 (1) (2005) 24-34.
[6]	J. Seo, J. S. Jang, D. Bai, Lifetime and reliability estimation of repairable redundant system subject to periodic alternation, Reliability Engineering & System Safety 80 (2) (2003) 197-204.
[7]	S. Deolalkar, Handbook for designing cement plants, (2009).
[8]	F. Akgül, D. M. Frangopol, Lifetime performance analysis of existing prestressed concrete bridge superstructures, Journal of Structural Engineering 130 (12) (2004) 1889-1903.
[9]	F. Akgül, D. M. Frangopol, Lifetime performance analysis of existing reinforced concrete bridges. II: Application, Journal of infrastructure systems 11 (2) (2005) 129-141.
[10]	H. Eskandari, M. G. Nik, A. Pakzad, Foundation analyzing of centrifugal ID fans in cement plants, Alexandria Engineering Journal (2016).
[11]	Design of structures and foundation for vibrating machines by Surech Arya, Michel O’ Neil, Gorge Pincus.
[12]	Reddeppa Nulu, Jayarami Reddy Bommireddy, Hanchate Sudarsana Rao. (2020) “Foundation for Primary Air Fan of speed 1490 rpm - Study of dynamic behavior” SCIREA Journal of Civil Engineering and Building Construction.
[13]	Reddeppa Nulu, Jayarami Reddy Bommireddy, Hanchate Sudarsana Rao. (2020) “ID Fan Foundation: Study of Dynamic Behavior” A paper presented at Springer Journal of Inst. Eng. India Ser. A.
[14]	Anonymous, IS: 2974 (Part-3) – 1992, “Design and Construction of Machine Foundations – Foundations For Rotary Type Machines (Medium and High Frequency)”, Bureau of Indian Standards.
[15]	Anonymous, IS: 2974 (Part-4) – 2000, “Design and Construction of Machine Foundations – Foundations For Rotary Type Machines (Low Frequency)”, Bureau of Indian Standards.
[16]	ISO 1940-1: 2003 Mechanical vibration — Balance quality requirements for rotors in a constant (rigid) state — Part 1: Specification and verification of balance tolerances.

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APA Style

Nulu Reddeppa, Bommireddy Jayarami Reddy, Hanchate Sudarsana Rao. (2021). Coal Mill Foundation – A Finite Element Approach for Study of Dynamic Analysis. Engineering Science, 6(4), 82-99. https://doi.org/10.11648/j.es.20210604.14

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ACS Style

Nulu Reddeppa; Bommireddy Jayarami Reddy; Hanchate Sudarsana Rao. Coal Mill Foundation – A Finite Element Approach for Study of Dynamic Analysis. Eng. Sci. 2021, 6(4), 82-99. doi: 10.11648/j.es.20210604.14

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AMA Style

Nulu Reddeppa, Bommireddy Jayarami Reddy, Hanchate Sudarsana Rao. Coal Mill Foundation – A Finite Element Approach for Study of Dynamic Analysis. Eng Sci. 2021;6(4):82-99. doi: 10.11648/j.es.20210604.14

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@article{10.11648/j.es.20210604.14,
  author = {Nulu Reddeppa and Bommireddy Jayarami Reddy and Hanchate Sudarsana Rao},
  title = {Coal Mill Foundation – A Finite Element Approach for Study of Dynamic Analysis},
  journal = {Engineering Science},
  volume = {6},
  number = {4},
  pages = {82-99},
  doi = {10.11648/j.es.20210604.14},
  url = {https://doi.org/10.11648/j.es.20210604.14},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.es.20210604.14},
  abstract = {In general coal mill foundation consist of a block foundation with heavy concrete mass. Its dynamic behavior is studied using Barkan’s1 method by most of the engineering practitioners. Foundation is generally sized such that the foundation mass is about more than three times the mass of the equipment using the empirical guidelines. This method has limitations in providing wholistic details of foundation behavior like transient stage deformations and response for the exited forces, foundation response at specific areas/nodes of the foundation etc. Also, this method has got limitation in mode shapes. This method can provide only fundamental mode shapes. That is in three linear directions and three rotational directions. But in practical, Mode shapes exist with coupled directions with appropriate mass participations over and above the fundamental directions. In this study a three-dimensional Finite Element Model is used to study coal mill foundation dynamic response and it’s behavior. This approach plugs all the limitations of Barkan’s method. 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. Dynamic forces from coal mill, gear box and motor which act at different frequencies and at different planes are applied on the model at appropriate nodes. Natural frequencies of the foundation system and displacement amplitudes from the forced vibration analysis are obtained using the above model. Mode shapes of the various modes are plotted. Foundation response for equipment startup and shut down conditions (transient stages) are studied by plotting displacement amplitudes w.r.t frequency variation.},
 year = {2021}
}

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TY - JOUR
T1 - Coal Mill Foundation – A Finite Element Approach for Study of Dynamic Analysis
AU - Nulu Reddeppa
AU - Bommireddy Jayarami Reddy
AU - Hanchate Sudarsana Rao
Y1 - 2021/12/29
PY - 2021
N1 - https://doi.org/10.11648/j.es.20210604.14
DO - 10.11648/j.es.20210604.14
T2 - Engineering Science
JF - Engineering Science
JO - Engineering Science
SP - 82
EP - 99
PB - Science Publishing Group
SN - 2578-9279
UR - https://doi.org/10.11648/j.es.20210604.14
AB - In general coal mill foundation consist of a block foundation with heavy concrete mass. Its dynamic behavior is studied using Barkan’s1 method by most of the engineering practitioners. Foundation is generally sized such that the foundation mass is about more than three times the mass of the equipment using the empirical guidelines. This method has limitations in providing wholistic details of foundation behavior like transient stage deformations and response for the exited forces, foundation response at specific areas/nodes of the foundation etc. Also, this method has got limitation in mode shapes. This method can provide only fundamental mode shapes. That is in three linear directions and three rotational directions. But in practical, Mode shapes exist with coupled directions with appropriate mass participations over and above the fundamental directions. In this study a three-dimensional Finite Element Model is used to study coal mill foundation dynamic response and it’s behavior. This approach plugs all the limitations of Barkan’s method. 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. Dynamic forces from coal mill, gear box and motor which act at different frequencies and at different planes are applied on the model at appropriate nodes. Natural frequencies of the foundation system and displacement amplitudes from the forced vibration analysis are obtained using the above model. Mode shapes of the various modes are plotted. Foundation response for equipment startup and shut down conditions (transient stages) are studied by plotting displacement amplitudes w.r.t frequency variation.
VL - 6
IS - 4
ER -

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Author Information

Nulu Reddeppa

Department of Civil Engineering, Jawaharlal Nehru Technological University, Anantapuramu, India
Bommireddy Jayarami Reddy

Directorate of Indian Institute of Information Technology, Rajiv Gandhi University of Knowledge Technologies, Ongole, India
Hanchate Sudarsana Rao

Department of Civil Engineering, Jawaharlal Nehru Technological University, Anantapuramu, India

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APA Style

Nulu Reddeppa, Bommireddy Jayarami Reddy, Hanchate Sudarsana Rao. (2021). Coal Mill Foundation – A Finite Element Approach for Study of Dynamic Analysis. Engineering Science, 6(4), 82-99. https://doi.org/10.11648/j.es.20210604.14

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ACS Style

Nulu Reddeppa; Bommireddy Jayarami Reddy; Hanchate Sudarsana Rao. Coal Mill Foundation – A Finite Element Approach for Study of Dynamic Analysis. Eng. Sci. 2021, 6(4), 82-99. doi: 10.11648/j.es.20210604.14

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AMA Style

Nulu Reddeppa, Bommireddy Jayarami Reddy, Hanchate Sudarsana Rao. Coal Mill Foundation – A Finite Element Approach for Study of Dynamic Analysis. Eng Sci. 2021;6(4):82-99. doi: 10.11648/j.es.20210604.14

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@article{10.11648/j.es.20210604.14,
  author = {Nulu Reddeppa and Bommireddy Jayarami Reddy and Hanchate Sudarsana Rao},
  title = {Coal Mill Foundation – A Finite Element Approach for Study of Dynamic Analysis},
  journal = {Engineering Science},
  volume = {6},
  number = {4},
  pages = {82-99},
  doi = {10.11648/j.es.20210604.14},
  url = {https://doi.org/10.11648/j.es.20210604.14},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.es.20210604.14},
  abstract = {In general coal mill foundation consist of a block foundation with heavy concrete mass. Its dynamic behavior is studied using Barkan’s1 method by most of the engineering practitioners. Foundation is generally sized such that the foundation mass is about more than three times the mass of the equipment using the empirical guidelines. This method has limitations in providing wholistic details of foundation behavior like transient stage deformations and response for the exited forces, foundation response at specific areas/nodes of the foundation etc. Also, this method has got limitation in mode shapes. This method can provide only fundamental mode shapes. That is in three linear directions and three rotational directions. But in practical, Mode shapes exist with coupled directions with appropriate mass participations over and above the fundamental directions. In this study a three-dimensional Finite Element Model is used to study coal mill foundation dynamic response and it’s behavior. This approach plugs all the limitations of Barkan’s method. 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. Dynamic forces from coal mill, gear box and motor which act at different frequencies and at different planes are applied on the model at appropriate nodes. Natural frequencies of the foundation system and displacement amplitudes from the forced vibration analysis are obtained using the above model. Mode shapes of the various modes are plotted. Foundation response for equipment startup and shut down conditions (transient stages) are studied by plotting displacement amplitudes w.r.t frequency variation.},
 year = {2021}
}

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