Dynamics of Ocean Structures

By Prof. Srinivasan Chandrasekaran   |   IIT Madras
Learners enrolled: 763
The course will give a brief overview of different types of ocean structures that are deployed in sea for exploiting oil, gas and minerals. While fundamentals of structural dynamics are discussed, detailed mathematical modeling of ocean structures and their dynamic analysis under waves, wind and current are highlighted with special emphasis to fluid-structure interaction. Introduction to stochastic dynamics of ocean structures is also discussed with lot of tutorials and sample papers that shall intuit self-learning through the course. Focus is on the explanation of fundamental concepts as addressed to graduate students..

INTENDED AUDIENCE       : Any interested learners.
Course Status : Completed
Course Type : Core
Duration : 12 weeks
Start Date : 14 Sep 2020
End Date : 04 Dec 2020
Exam Date : 20 Dec 2020 IST
Enrollment Ends : 25 Sep 2020
Category :
  • Ocean Engineering
Credit Points : 3
Level : Undergraduate/Postgraduate

Page Visits

Course layout

Week 1:  Introduction to offshore structures
        Environmental loads
Structural action

Week 2:  Single degree-of-freedom
Equation of motion
Free vibration of SDOF systems

Week 3:  Damped and undamped forced vibration
Damped forced vibration
Response build up

Week 4:  Numerical examples
Numerical examples- MDOF

Week 5:  Eigen value problems
Orthogonality of modes
Numerical methods in MDOF

Week 6:  Influence coefficient method
Stodla method
Rayleigh method
Modal response of MDOF

Week 7:  Rayleigh damping
Caughey damping
Damping by super-positioning
Duhamel integral
Model super position and Truncation
Missing mass correction

Week 8:  Fluid structure interaction
Retrofitting and Rehabilitation
Earthquake forces

Week 9:  Articulated towers
Fluid structure interaction application in ocean structures
Response control of compliant structures (MLAT)
MLAT with passive damperss

Week 10: Tension leg platforms
Fluid-structure interaction
Dynamic analysis for springing and ringing

Week 11: Numerical integration
Dynamic analysis offshore triceratops
Stochastic process

Week 12: Response spectrum
Return period
Fatigue damage

Thanks to the support from MathWorks, enrolled students have access to MATLAB for the duration of the course.

Books and references

1.Arvid Naess and Torgeir Moan. 2013. Stochastic dynamics of marine structures, Cambridge University Press, New York, USA.
2.ASTM E 1049-85. 2005. Rain flow counting method, 1987.
3.Benjamin, JR and Cornell, CA. 1970. Probability, statistics and decisions for civil engineers, John Wiley, New York.
4.Chakrabarti, S. K. 1987. Hydrodynamics of Offshore Structures: Computational Mechanics.
5.Chakrabarti, S. K. 1990. Non-linear methods in offshore engineering, Elsevier Science Publisher, The Netherlands.
6.Chakrabarti, S. K. 1994.Offshore Structure Modeling: World Scientific.
7.Srinivasan Chandrasekaran and R. Nagavinothini. 2020. Offshore compliant platforms: Analysis, design and experimental studies, Wiley, U.K, Wiley, U.K, ISBN: 978-1-119-66977-7
8.Srinivasan Chandrasekaran. 2019. Advanced steel design of structures. CRC press, Florida, ISBN: 978-036-72-3290-0
9.Srinivasan Chandrasekaran. 2019. Structural Health Monitoring with application to offshore structures, World Scientific Publishing Co., Singapore, ISBN: 978-971-12-0108-0
10.Srinivasan Chandrasekaran. 2018. Advanced structural analysis with MATLAB, CRC Press, Florida, USA, ISBN: 978-036-70-2645-5.
11.Srinivasan Chandrasekaran and Gaurav Srivastava. 2017. Design aids for offshore structures under special environmental loads including fire resistance, Springer, Singapore ISBN 978-981-10-7608-4.
12.Srinivasan Chandrasekaran. 2017. Dynamic analysis and design of ocean structures, Springer, 2nd Ed., Singapore. ISBN:978-981-10-6088-5
13.Srinivasan Chandrasekaran and A.K.Jain. 2016. Ocean structures: Construction, Materials and Operations, CRC Press, Florida, ISBN: 978-149-87-9742-9.
14.Srinivasan Chandrasekaran. 2016. Offshore Structural Engineering: Reliability and Risk Assessment, CRC Press, Florida, ISBN: 978-14-987-6519-0
15.Srinivasan Chandrasekaran. 2015. Dynamic analysis and design of ocean structures. Springer, INDIA, ISBN: 978-81-322-2276-7.
16.Srinivasan Chandrasekaran. 2015. Advanced Marine structures, CRC Press, Florida (USA), ISBN 978-14-987-3968-9.
17.Srinivasan Chandrasekaran. 2014. Advanced Theory on Offshore Plant FEED Engineering, Changwon National University Press, Republic of South Korea, pp.237. ISBN:978-89-969-7928-9
18.Srinivasan Chandrasekaran and Subrata Kumar Bhattacharyya. 2012. Analysis and Design of Offshore Structures with illustrated examples. Human Resource Development Center for Offshore and Plant Engineering (HOPE Center), Changwon National University Press, Republic of Korea ISBN: 978-89-963-9155-5, pp. 285.

Other NPTEL courses for more detailed studies:

1.Srinivasan Chandrasekaran. 2020. Dynamics of Ocean structures, Re-run Video course on MOOC, NPTEL portal at https://onlinecourses.nptel.ac.in/noc20_oe02/
2.Srinivasan Chandrasekaran. 2020. Offshore structures under special loads including fire resistance, Re-run Video course on MOOC, NPTEL portal at https://onlinecourses.nptel.ac.in/noc20_oe01
3.Srinivasan Chandrasekaran. 2018. Structural Health Monitoring, Video course on MOOC, NPTEL portal at https://nptel.ac.in/courses/114/106/114106046/
4.Srinivasan Chandrasekaran. 2018. Risk and Reliability of offshore structures, Video course on MOOC, NPTEL portal at https://onlinecourses-archive.nptel.ac.in/noc18_oe03/preview
5.Srinivasan Chandrasekaran. 2013. Ocean structures and materials, Video course on NPTEL portal. Available at http://nptel.ac.in/courses/114106035/
6.Srinivasan Chandrasekaran. 2013. Advanced Marine Structures, Video course on NPTEL portal. Available at: http://nptel.ac.in/courses/114106037/

Instructor bio

Prof. Srinivasan Chandrasekaran

IIT Madras
Srinivasan Chandarsekaran is currently a Professor in the Dept. of Ocean Engineering, Indian Institute of Technology Madras, India. He has teaching, research and industrial experience of about 23 years during which he has supervised many sponsored research projects and offshore consultancy assignments both in India and abroad. His active areas of research include dynamic analysis and design of offshore platforms, Development of geometric forms of complaint offshore structures for ultra-deep water oil exploration and production, sub-sea engineering, Rehabilitation and retrofitting of offshore platforms, structural health monitoring of ocean structures, seismic analysis and design of structures and risk analyses and reliability studies of offshore and petroleum engineering plants. He has been also a visiting fellow under the invitation of Ministry of Italian University Research to University of Naples Federico II, Italy for a period of two years during which he conducted research on advanced nonlinear modelling and analysis of structures under different environmental loads with experimental verifications. He has about 110 research publications in International journals and refereed conferences organized by professional societies around the world. Four text books authored by him are quite popular amongst graduate students of civil and ocean engineering and recommended as reference material for class room studies and research as well. He also delivered four web-based courses namely: i) Dynamic analysis of ocean structures; ii) Ocean structures and materials; iii) Advanced marine structures; and iv) Health, safety and Management in offshore and petroleum engineering. He is a member of many National and International professional bodies and delivered many invited lectures and key note address in the international conferences, workshops and seminars in India and abroad.

Course certificate

• The course is free to enroll and learn from. But if you want a certificate, you have to register and write the proctored exam conducted by us in person at any of the designated exam centres.
• The exam is optional for a fee of Rs 1000/- (Rupees one thousand only).
• Date and Time of Exams: 20 December 2020, Morning session 9am to 12 noon; Afternoon Session 2pm to 5pm.
• Registration url: Announcements will be made when the registration form is open for registrations.
• The online registration form has to be filled and the certification exam fee needs to be paid. More details will be made available when the exam registration form is published. If there are any changes, it will be mentioned then.
• Please check the form for more details on the cities where the exams will be held, the conditions you agree to when you fill the form etc.

• Average assignment score = 25% of average of best 8 assignments out of the total 12 assignments given in the course. 
• Exam score = 75% of the proctored certification exam score out of 100
• Final score = Average assignment score + Exam score

• If one of the 2 criteria is not met, you will not get the certificate even if the Final score >= 40/100.
• Certificate will have your name, photograph and the score in the final exam with the breakup.It will have the logos of NPTEL and IIT Madras. It will be e-verifiable at nptel.ac.in/noc
• Only the e-certificate will be made available. Hard copies will not be dispatched.

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