Contents:
Introduction to different types of ocean structures – Development of structural forms for deep and ultra-deep waters – Environmental forces – structural action of ocean structures – fluid-structure interaction – Introduction to structural dynamics – Characteristics of single degree-of-freedom model – Methods of writing equation of motion – comparison of methods – Free and forced vibration of single degree-of-freedom systems – Undamped and damped systems – Formulation of equation of motion – examples – Coulomb damping – comparison of damped and undamped forced vibration – response build up – Numerical problems in single degree-of-freedom systems – Two degrees-of-freedom systems.

Formulation of equation of motion – Eigenvalues and eigenvectors – Orthogonality of modes – Study of multi degrees-of-freedom systems – Equations of motion – Natural frequencies and mode shapes – Stodla, Rayleigh-Ritz and influence coefficient methods, Dunkerley – Matrix methods for dynamic analysis – Eigen solution – Modal analysis – Structural action of offshore structures – Types of offshore structures based on the geometric form – Development of structural form for deep waters – Fluid-structure interaction – Dynamic analysis of offshore jacket platforms – steps of analysis using software – Dynamic analysis of articulated towers – Iterative frequency domain – Multi-legged articulated towers – Response control of multi-legged articulated towers using tuned mass dampers – Experimental and analytical studies on MLAT – Development of Tension Leg Platforms and geometric optimization – Dynamic analyses of TLPs

Development of Mass, stiffness and damping matrices of TLP from first principles – Dynamic analysis methodology of offshore structures under earthquakes – TLPs under seismic excitation – Development of new generation offshore structures – Buoyant Leg Structures and offshore triceratops – Numerical modeling of offshore triceratops using software – Comparison of experimental, analytical and numerical studies on offshore triceratops – Estimate of damping: Classical damping, Rayleigh and Caughey – Damping by mode superposition – Analytical technique to solve equation of motion using in Newmarks Beta method – Introduction to stochastic dynamics of ocean structures – Random environmental processes – Stationary process – Response spectrum – Narrow band process – Return period – Fatigue prediction – Modal response method – Modal mass contribution – Missing mass correction, Example problems – Duhamel’s integrals

Other Resources

Course Curriculum

Mod-01 Lec-01 Introduction to different types of ocean structures I Details 47:46
Mod-01 Lec-02 Introduction to different types of ocean structures II Details 47:52
Mod-01 Lec-03 Introduction to different types of ocean structures III Details 46:19
Mod-01 Lec-04 Types of Compliant towers Details 51:10
Mod-01 Lec-05 New Generation offshore and Coastal structures Details 56:29
Mod-01 Lec-06 Environmental forces Details 49:33
Mod-01 Lec-07 Wave forces, Current Details 0:51
Mod-01 Lec-08 Introduction to Structural dynamics Details 48:58
Mod-01 Lec-09 Characteristics of single degree – of- freedom model Details 40:48
Mod-01 Lec-10 Methods of writing equation of motion Details 50:25
Mod-01 Lec-11 Free and forced vibration of single degree – of – freedom systems Details 47:27
Mod-01 Lec-12 Undamped and damped systems I Details 44:7
Mod-01 Lec-13 Undamped and damped systems II Details 48:38
Mod-01 Lec-14 Undamped and damped systems III Details 51:14
Mod-01 Lec-15 Comparison of methods Details 54:30
Mod-01 Lec-16 Examples Details 44:51
Mod-01 Lec-17 Numerical problems in single degree – of – freedom systems Details 51:14
Mod-01 Lec-18 Two degrees – of – freedom systems Details 44:23
Mod-01 Lec-19 Eigenvalues and Eigenvectors Details 49:15
Mod-01 Lec-20 Orthogonality of modes Details 48:23
Mod-01 Lec-21 Study of Multi degrees – of – freedom systems Details 43:12
Mod-01 Lec-22 Equations of motion Details 50:18
Mod-01 Lec-23 Natural frequencies and mode shapes Details 53:4
Mod-01 Lec-24 Stodla, Rayleigh – Ritz and influence coefficient methods, Dunkerley Details 53:23
Mod-01 Lec-25 Continuous system Details 52:53
Mod-02 Lec-01 Structural action of offshore structures Details 51:1
Mod-02 Lec-02 Fluid – Structure interaction I Details 56:47
Mod-02 Lec-03 Fluid – Structure interaction II Dynamic analysis of offshore jacket platforms Details 51:2
Mod-02 Lec-04 Steps of analysis using software Details 43:34
Mod-02 Lec-05 Steps of analysis using software (contd..) Details 52:40
Mod-02 Lec-06 Dynamic analysis of articulated towers Details 50:46
Mod-02 Lec-07 Iterative frequency domain I Details 49:27
Mod-02 Lec-08 Iterative frequency domain II Details 55:33
Mod-02 Lec-09 Multi – legged articulated towers Details 53:11
Mod-02 Lec-10 Response control of multi-legged articulated towers using tuned mass Details 35:28
Mod-02 Lec-11 Development of Tension Leg Platforms and geometric optimization Details 54:1
Mod-02 Lec-12 Dynamic analyses of TLPs Details 58:19
Mod-02 Lec-13 Development of Mass, stiffness and damping matrices of TLP from first principles Details 51:17
Mod-02 Lec-14 Estimate of classical damping Details 54:32
Mod-02 Lec-15 TLPs under seismic excitation Details 50:28
Mod-02 Lec-16 Direct Integration method Details 57:25
Mod-02 Lec-17 Development of new generation offshore structures Details 43:32
Mod-03 Lec-01 Introduction to stochastic dynamics of ocean structures Details 53:11
Mod-03 Lec-02 Response spectrum Details 54:47
Mod-03 Lec-03 Narrow band process Details 50:42
Mod-03 Lec-04 Return period, Fatigue prediction Details 56:15
Mod-03 Lec-05 Modal response method, Modal mass contribution Details 50:48
Mod-03 Lec-06 Missing mass correction, Example problems Details 56:33
Mod-03 Lec-07 Duhamel’s integrals Details 50:32

This course is part of NPTEL online courses, delivered by IIT Madras.

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