Dr B. Subbaratnam

Name of the Department:
Mechanical Engineering
Faculty Id:
VCE1050
Designation:
PROFESSOR
Years of Experience:
28
Employment Status:
Full Time – Ratified by JNTUH

Date of Birth:

08th June 1966

Areas of Specialization :

Vibrations and Structural Dynamics

Qualification:

Ph.D. in Structral Mechanics 2012 ,JNTUH,
PG Degree in Machine Design,1998, JNTU Kakinada,
UG Degree in Mechanical Engineering,1987,University of Mysore,Karnataka.

Subjects Taught:

Engineering Mechanics, Engineering Drawing, Mechanics of Solids, Machine Drawing, Kinematics of Machinery, Design of Machine Members, Finite Element Method, Aerospace Vehicle Structres I, Aerospace Vehicle StructresII, Structral analysis & Detailed design.

Papers Published:

Awards:

  1. Recipient of the Research Excellence Award-2017 from the Institute for Exploring Advances in Engineering(IEAE) in 2017.
  2. Recipient of the Gold Medal for the best paper (Aerospace Engineering) from The Institution of Engineers (India) (2012).
  3. Received Certificate of Merit for academic excellence by producing 100 percent pass in Aerospace Vehicle Structure-I in Malla Reddy College of Engineering and Technology, Secunderabad, in the year academic 2006-2007.

Research:

  1. M. Tech Students Guided:11
  2. Ph. D scholars presently working:1

Publications:

International Journals:

  1. Venkateswara Rao, B. Subba Ratnam and G. Ranga Janardhana, “Master Dynamic Stability formula for structural members subjected to periodic loads”, American Institute of Aeronautics and Astronautics Journal (AIAA), Vol.46, No.2, 2008, pp. 537-540.
  2. Venkateswara Rao, B. Subba Ratnam, Jagadish Babu Gunda and G. R. Janardhana, “Master Formula for Evaluating Vibration Frequencies of Structural Members under Compressive Loads”, The IES Journal Part A: Civil & Structural Engineering, Vol.4,No.2, May 2011,pp.79-88.
  3.  Subba Ratnam, G. Venkateswara Rao and G. Ranga Janardhana, “Study of dynamic stability of simply supported beams on Pasternak foundation considering the effect of first transition foundation parameter” Journal of Applied Mathematics and Mechanics (ZAMM), 92, No.6, pp. 490-496,2012. DOI 10.1002/zamm.201100040.
  4. Subba Ratnam, G. Venkateswara Rao and G. Ranga Janardhana, “Master Formula for Geometrically Nonlinear Dynamic Instability of Shear Flexible Beams”, AIAA Journal, Vol. 51, pp. 257 – 262, JAN 2013.
  5. B.Subba Ratnam and G. Venkateswara Rao, “An Exotic concept of Master Dynamic Stability Point”, International Journal of Computing, Communications and Systems, Vol.1, No.2, pp.14-17, July, 2013.
  6. V. Ramana Reddy, B. Subba Ratnam and G. Venkateswara Rao, “Prediction of dynamic stability Behavior of Thin Square Plates subjected to constant compressive and Periodic including compressive loads on the perpendicular edges”, International Journal of Current engineering and Techlogy,Vol.4, Spl.issueNo.2, pp.620-624,Feb 2014. DOI: http://dx.doi.org/10.14741/ijcet/spl.2. 2014. 118
  7. Arjun, T. Tirupati, B. Subba Ratnam and K.Meera sahib, ”Analysis of Unconventional Wing Structures of a Hyper-X Hypersonic Flight Research Vehicle for the Mach 7 Mission”, International Journal of Current Engineering and Techlogy,Vol.4, Spl. issue No.2, pp.461-465, Feb 2014. DOI: http://dx.doi.org/10.14741/ijcet/spl.2.2014.85.
  8. Sameer Chakravarthy N. C and Subbaratnam, “ Finite element and Fatigue analysis of Spur Gear under Random loading”, International Journal of Mechanical Engineering and Robotics Research,Vol.3, No.4, pp.533-541, Oct’2014. (ISSN :2278-0149)
  9. Ruth Priyanka Ponnala and B .Subbaratnam, “Design and Dynamic analysis of a Fuze Body Outercase used in Guided Missile” SSRG International Journal of Mechanical Engineering (SSRG-IJME) – Vol. 1 No. 6, pp.1-8, October 2014. (ISSN :2348-8360)
  10. Anjaneya Reddy and B. Subbaratnam, “Turn-mill Process optimization of a Complex electronic component”, International Journal of Mechanical Engineering and Robotics Research, Vol.3, No.4, pp.518-525, Oct’2014, (ISSN: 2278-0149).
  11. Suri Babu and Dr. B. Subbaratnam, “Finite Element Analysis of Steam Boiler Used In Power Plants” SSRG International Journal of Mechanical Engineering (SSRG-IJME) – Vol. 1 No. 6, pp. 28-35, October 2014, (ISSN :2348-8360).
  12.  Subba Ratnam and G. Venkateswara Rao, Prediction of Dynamic Stability Behavior of Structural Members Subjected to Periodic Load through the Concept of Dynamic Stability Point, Journal of Structural Engineering, Vol.41, No.5, Dec2014-Jan 2015, pp.559-564.
  13. P Kiran Babu and B Subbaratnam, “Design and kinematic analysis of slider crank mechanism using CATIA and MAT Lab”, International Journal of Applied Research, Vol.1, No.12, pp.1046-1050, 2015(ISSN Print: 2394-7500)
  14. Alka Sawale, Sreekanth Sura, Anitha D and Subbaratnam, ”Conceptual Design of Flying Vehicle” International Journal of Mechanical Engineering and Technology (IJMET), Vol. 8, No. 6, pp. 471–479, June 2017, (Scopus Indexed Journal).
  15. V. Ramana Reddy, B. Subbaratnam, E. Manoj Kumar and Perala kalyan Praneeth, “Design And Analysis of Composite Leaf Spring” International Journal of Mechanical Engineering and Technology (IJMET),Vol.8, No.6, pp. 494–500, June 2017. (Scopus Indexed Journal).
  16. SubbaratnamD.V. Ramana Reddy, , A. Udaya Deepika and G.V.R. Seshagiri rao, “Dynamic stability Analysis of Structural Members” International Journal of Mechanical Engineering and Technology (IJMET),Vol.8, No.8, pp. 892–899, August 2017. (Scopus Indexed Journal).
  17. J.S Soni, Dr. T. Vijaya Babu and Dr. B. Subbaratnam, “Influence of Processes Parameters of Al6063/ZnSio4p Metal Matrix Composite on WEDM using Response Surface Methodology(RSM)” International Journal of Engineering Technology Science and Research (IJETSR),Vol.4, No.8, pp. 195-201,August 2017.(UGC Approved Journal)
  18.  Subbaratnam, S. Naresh Kumar, G. Arun Reddy and C. Satya Sandeep, “General Formula To Estimate Frequency Of Initially Stressed Beams With Complex Secondary Effects” International Journal of Mechanical Engineering and Technology (IJMET),Vol.8, No.12, pp. 433-440, 2017. (Scopus Indexed Journal).
  19. Vijay Babu and B. Subbaratnam “Optimization of Process Parameters of Aluminium alloy 8011 in Wire cut Electrical Discharge Machining (WEDM) using Taguchi and ANOVA”, International Journal of Pure and Applied Mathematics, Volume 120, No. 6 2018, 8155-8164,ISSN: 1314-3395
  20. Vijaya Babu and B. Subbaratnam, Experimental investigation of Wire Electrical Discharge Machining (WEDM) Process Parameters on SS304 using Taguchi method, 2018, International Journal of Current Engineering and Technology, Vol-8(3), pp.504-507.
  21.  Subbaratnam, M. Harsha and S. Naresh Kumar,” Dynamic Stability of Plates Resting on Elastic Foundation” International Journal of Mechanical and Production Research and Development (IJMPERD), Vol.9, No.5 Oct 2019,pp.581-590. (SCOPUS)
  22. Shakti P Jena and Dayal R Parhi, S Naresh Kumar, B Subbaratnam, “Crack detection in moving load dynamics problems based statistical process control approach”, , Structural Integrity and life,20(Special),S5-S9,2020.(SCOPUS)
  23.  Subbaratnam, A, Ravinder Rao Jalagam,B, Shakti P Jena and M. Satyanarayana Gupta, “Effect of Higher Transition Foundation on Dynamic Stability Boundaries of Simply Supported Beam”, IOP Conference Series: Material Science and Engineering, Vol-998,pp. 1-10,2020, doi:10.1088/1757-899X/998/1/012043(SCOPUS).
  24. Shakti P Jena , Mohd Ibrahim, Subbaratnam, S Naresh Kumar, “Dynamic Behavior of Ropeway String”, IOP Conference Series: Material Science and Engineering, Vol-998,pp. 1-10,2020, doi:10.1088/1757-899X/998/1/012068. (SCOPUS)
  25. Naresh Kumar , K Srikanth , B Subbaratnam, Shakti P Jena, “Damage Detection in Composite Materials Using Lamb Wave method”, IOP Conference Series: Material Science and Engineering, Vol-998,pp. 1-10,2020, doi:10.1088/1757-899X/998/1/012066. (SCOPUS)

National Journals:

  1. B. Subba Ratnam, G. Venkateswara Rao and G. Ranga Janardhana, “Elegant universal formula to predict dynamic stability of columns subjected to axial periodic loads”, Journal of Structural Engineering (SERC, CSIR), Vol. 36, pp. 452 – 455, 2010.
  2. B. Subba Ratnam, G. Venkateswara Rao and G. Ranga Janardhana, Development of Three Simple Master Dynamic Stability Formulas for Structural Members Subjected to Periodic Load”, Journal of The Institution of Engineers (India), Vol .92, May 2011, pp. 9-14.
  3. B. Subba Ratnam, G. Venkateswara Rao and G. Ranga Janardhana, “Dynamic Stability of Beams on Elastic Foundation”, Journal of Structural Engineering (SERC, CSIR) Vol.38, No.2, June-July 2011, pp.150-160.
  4. B. Subba Ratnam, G. Venkateswara Rao and G. Ranga Janardhana, Dynamic Stability of beams subjected to end periodic and static tensile axial load, Journal of Structural Engineering, Vol.39, No.2, June-July2012, pp.263-268.

International Conferences:

  1.  Subba Ratnam, G. Venkateswara Rao and G. Ranga Janardhana, “Prediction of dynamic stability behavior of columns subjected to axial periodic loads – An energy approach”, 53rd Congress of Indian Society of Theoretical and Applied Mechanics (An International Meet),  Souvenir  with ABSTRACTS,  p. 26, 2008.
  2.  Subba Ratnam, G. Venkateswara Rao and G. Ranga Janardhana, “General formula to evaluate fundamental frequency of initially loaded beams with complex secondary effects”, Invited Paper, PROCEEDINGS of International Conference on Composites for 21st Century – Current and Future Trend (ICC –CFT 2011), Edited by Dattaguru et al., 4 – 7 January 2011, IISc, Bangalore– 560 012, India, pp. 119 – 124, 2011.
  3.  Subba Ratnam, G. Venkateswara Rao and G. Ranga Janardhana, “Simplification to the dynamic stability analysis of structural members” Proceedings of the International conference on materials Processing and characterization(ICMPC2012), Department of Mechanical EngineeringGokaraju Rangaraju College of Engineering and Technology, Hyderabad, 8-10March 2012, pp.367-373.
  4.  Subba Ratnam and G. Venkateswara Rao, “An Exotic Concept of Master Dynamic Stability Point” International conference on computing, communication, systems and applications(ICCCSA-2012), Malla Reddy College of Engineering and Technology, Secunderbad, 30-31,March 2012, pp-253-256.(ISBN:978-81-921580-8-2).
  5.  Subba Ratnam, G. Venkateswara Rao and D.V. Ramana Reddy, ”Dynamic Instability Analysis Of Thin Square Plates Subjected To Constant Compressive And Periodic Including Constant Compressive Loads On Perpendicular Edges” Paper presented at 2nd world Conference on applied Sciences, Engineering and Technology 2013, Organizing by GITAM UniversityHyderabadA.P, 8-9, March 2013.
  6.  Subba Ratnam, D.V. Ramana Reddy and Jagadish Babu Gunda, “ Dynamic Stability Behaviour of Cantilever Beams Resting on an Elastic Foundation Subjected to Axial Periodic Loads”, Proccedings of 61st Congress of The Indian Society of Theoretical and Applied Mechanics ISTAM  (An International Conference),  Dec11-14,2016,  VIT University, Vellore, Tamilnadu, India,  E-proceedings, 61-istam-sm-fp-477 ,pp. 1-12,2016.
  7. J. S Soni, Dr. T. Vijaya Babu and Dr. B. Subbaratnam, “Influence of Processes Parameters of Al6063/ZnSio4p Metal Matrix Composite on WEDM using Response Surface Methodology(RSM)” Paper Presented at 6th International conference on Research trends in Engineering, Applied Science and Management (ICRTESM-2017), Organized by Institution of Electronics and Telecommunication Engineers, Bengaluru ,Karnataka, 6th August 2017.
  8.  Subbaratnam, Shakti Prasanna Jena and D.V.Ramana Reddy. “Dynamic Stability Behaviour Of Simply Supported Beam Resting On Elastic Foundation And The Effect Of Higher Transition Foundation On Dynamic Stability Boundaries” 13th International Conference on Vibration problems(ICOVP2017),Organizing by Indian Institute of Technology, Guwahati, November 29 –December 2, 2017.
  9. Shakti P. Jena, Dayal R. Parhi, B Subbaratnam, “Crack Detection in Structure under Moving Load Using Statistical Process Control Based Approach” 13th International Conference on Vibration problems (ICOVP2017), Organizing by Indian Institute of Technology, Guwahati, November 29 –December 2, 2017.
  10.  Subbaratnam, D.V. Ramana Reddy, S. Naresh Kumar and Jagadish Babu Gunda, “Dynamic Stability Behaviour of Cantilever Beam resting on Pasternak Foundation subjected to Periodic Loads” International Conference on Composite Materials and Structures(ICCMS2017), Organizing by Indian Institute of Technology, Hyderabad, 27 –29 Dec 2017.
  11. Shakti P. Jena, Dayal R. Parhi and Subbaratnam, Parametric evaluation on the response of damaged simple supported structure under transit mass, ASME Gas Turbine, India, 2017, ASME Proceedings (Structures and Dynamics) Paper No. GTINDIA2017-4537, pp. V002T05A003, doi: 10.1115/GTINDIA2017-4537.
  12. Venukumar, S. Ramagiri, T. Vijayababu and B. Subbaratnam, Instability in machine tools due to asymmetry and gyroscopic couple. (To be published in SCOPUS INDEXED Journal), ICRAMMT-November, 2018, Hyderabad.
  13. Jena, Shakti P., Parhi, Dayal R. and  Subbaratnam, Dynamic analysis of inclined edge cracked structure under moving mass. (To be published in SCOPUSINDEXED Journal), WESPAC-2018, NPL (CSIR), 11th -15th November, 2018. New Delhi.
  14. Jena, Shakti P., Parhi, Dayal R. and  Subbaratnam,  Identification of parameters in moving load dynamics problem using statistical process recognition approach, (To be published in SCOPUS INDEXED Journal), NOIEAS-2018, 19th -21st June,2019, NIT, Warangal.
  15.  Subbaratnam and A. Sandeep Vijay Reddy,” Dynamic Instability of Rectangular Plate Resting on Elastic Foundation subjected to Periodic Loads” International Conference on Manufacturing , Material Science and Engineering (ICMMSE-2019), AIP Conference Proceedings 2200, 020084 (2019); https://doi.org/10.1063/1.5141254
  16. Manideep, B. Subbaratnam and M.Harsha,” Design and Development of Pallet Extruder” International Conference on Manufacturing, Material Science and Engineering (ICMMSE-2019), AIPConferenceProceedings2200,020090(2019); https://doi.org/10.1063/1.5141260
  17. SarellaNaresh Kumar Subbaratnam and K. Meera Saheb” Synthesis and evaluation of mechanical properties of Kevlar composite with nano alumina and nano titanium dioxide” International Conference on Manufacturing, Material Science and Engineering (ICMMSE-2019), AIP Conference Proceedings 2200, 020085 (2019); https://doi.org/10.1063/1.5141255

National Conferences:

  1. B. Subba Ratnam, G. Venkateswara Rao and G. Ranga Janardhana, “Dynamic stability of columns on elastic foundation”, Proceedings of the National Conference on ‘Emerging Trends in Mechanical Engineering’ (ETME – 2009), Department of Mechanical Engineering, Sreenidhi Institute of Science & Technology, Hyderabad, India,pp.188-192,1–2 July,2009.
  2. Surendra Bogadi and B. Subba Ratnam, “Flow Field Investigation around a typical Re Entry capsule at Supersonic speed”Proceedings of the National Conference on ‘Emerging Trends in Mechanical Engineering’ (ETME – 2009), Department of Mechanical Engineering, Sreenidhi Institute of Science & Technology, Hyderabad, India,pp 178-183.,1-2July, 2009.
  3. G. TaraKrishna Manohar and B. Subba Ratnam“Functional Replacing Hybrid for intelligent Manufacturing” Proceedings of the National Conference on ‘Emerging Trends in Mechanical Engineering’ (ETME – 2009), Department of Mechanical Engineering, Sreenidhi Institute of Science & Technology, Hyderabad, India, pp 226-232. 1–2 July, 2009.
  4. B. Subba Ratnam, G. Venkateswara Rao and G. Ranga Janardhana, “Dynamic stability of beams subjected to end axial periodic load” , Proceedings of the National Conference on Mechanical Engineering Emerging Trends (MEET 2010), Organized by Department Of Mechanical Engineering, VARDHAMAN COLLEGE OF ENGINEERING, Hyderabad – 501 218, pp.113 – 117, 6 – 7 August 2010.
  5. B. Subba Ratnam, G. Venkateswara Rao and G. Ranga Janardhana, “General formula to predict the dynamic stability of structural members subjected to end axial periodic loads” , Proceedings of the National Conference on Aerospace Engineering, Organized by Department of Aeronautical Engineering, Malla Reddy college of Engineering, Secunderabad – 500 014, Souvenir  with ABSTRACTS,  p. 83, 2010.

Workshops and Conferences organized:

  1. Acted as Convener for one week workshop on “Computational Approach Through MATlab” organized by Department of Mechanical Engineering, Vardhaman College of Engineering, Hyderabad from November7-12, 2016.
  2. Acted as Organizing Secretary for A National level student’s technical symposium on “AERODYNE ‘10” organized by Department of Aeronautical Engineering, Malla Reddy college of Engineering and Technology, Hyderabad, from April 3-4, 2010.
  3. Acted as Organizing Secretary for National Conference on “AEROSPACE ENGINEERING” organized by Department of Aeronautical Engineering, Malla Reddy college of Engineering and Technology, Hyderabad, from Dec4-5, 2009.
  4. Acted as Convener for workshop on “DESIGN ASPECTS OF MECHANICAL AND AEROSPACE ENGG” organized by Department of Aeronautical Engineering, Malla Reddy college of Engineering and Technology, Secunderabad from July 2-10,2009.
  5. Acted as Co-coordinator for National level student’s paper contest on “AERODYNE” organized by Department of Aeronautical Engineering, Malla Reddy college of Engineering and Technology, Hyderabad, from March 13-14, 2009.
  6. Acted as Convener for workshop on “ADVANCES IN CFD” organized by Department of Aeronautical Engineering, Malla Reddy college of Engineering and Technology, Secunderabad from Aug 28-30, 2008.

Books Published:

None

Patents:

S.No. Title of the Patent Application Number Status/Granted
1 Apparatus and Method for Detecting the Clogging of a Fuel Filter 201741041935 Published
2 CNG/NATURAL Gas Kit Design for Two Wheelers 202011030786 Published
3 Twin Chamber Storage Device 202141007421 Published