... a constrained NewWave into extreme stochastic sea states with directional spreading were also added. The present article documents the formulations of the new improvements to HydroDyn with example applications and numerical results. Keywords: OpenFAST, HydroDyn, nonlinear, wave stretching, constrained wave...

... ABSTRACT Figure 1: A marine riser evolves into a wine glass. Analytical, experimental and computational models have 2. BACKGROUND historically been heavily simplified, linearized, and otherwise The US Navy has been developing nonlinear physics-based reduced. This paper shows how such model reductions...

.... By implementing the Kelvin-Newman wave current interaction approach up to the wave s second order, we can assess the performance of the Kelvin-Newman wave current interaction formulation in various sea conditions. Keywords: Wave-Current Interaction, Kelvin-Newman, Difference Frequency, Nonlinear, Second Order 1...

... nonlinear physics-based time- domain simulations to show how fluid drag evolves geometric changes in slender (long and thin) structures. We then showed how these changes physically determine the specific dynamic nature of the vibrations that the fluid can induce in the structure. Induced vibrations are four...

... of the different cases, establishing a direct relation between the change in wave resistance and the energy content variation of the particular wave spectrum components. Keywords: Prolate Spheroid, Nonlinear, Boundary Conditions, Free-Surface NOMENCLATURE a1 spheroid major semiaxis a2, a3 spheroid minor semiaxis...

... to accurately simulate the behavior under cyclic bending cycles is critical in global riser fatigue analysis. The load-displacement relationship of a flexible joint typically follows a nonlinear curve, and it shows hysteresis behavior when subject to cyclic bending cycles. However, in current industry practice...

..., Forensic Analysis, Index of Priority Risk (IPR), Localized Buckling, Pipeline Integrity, Probability of Occurrence Rating (POR), Nonlinear, Stress corrosion cracking (SCC), von Mises Stress. Solid Model, and ULS (Ultimate Limit State) NOMENCLATURE Pipe nominal diameter Pipe nominal wall thickness External...

... TIME-DOMAIN NONLINEAR WAVE MAKING SIMULATION OF THE CATAMARAN BASED ON VELOCITY POTENTIAL BOUNDARY ELEMENT METHOD Dakui FENG School of Naval Architecture & Ocean Eng., Huazhong Univ. of Sci. & Tech Wuhan, Hubei, China feng_dk@mail.hust.edu.cn Xianzhou Wang School of Naval Architecture & Ocean Eng...

... into mooring stiffness and can be added in the differential equations of motion, which is calculated at its equilibrium point. For linear hydrodynamic analysis in frequency domain, any physical quantity should be linear or be linearized, however mooring stiffness is nonlinear in essence, so the tangent...

... Collision damages Residual strength Ultimate capacity Collapse Post-collapse Finite element analysis Nonlinear Benchmark study Proceedings of the ASME 28th International Conference on Ocean, Offshore and Arctic Engineering OMAE2009 May 31 - June 5, 2009, Honolulu, Hawaii ve , E Mar , No m ilHy er...

... 27 07 2009 Nonlinear dynamic analysis for offshore structures has been a major challenge in marine structures and earthquake engineering. Nonlinear Dynamic Analysis of the structures subjected to strong ground motions is the most reliable prediction method. This method is very complex...

... for nonlinear pile soil structure interaction effects. Based on a previously developed numerical BNWF-FE model for nonlinear seismic response of offshore platforms, in this paper, sensitivity of seismic response of an existing sample offshore platform to different earthquake events (with different duration...

... 22 05 2009 Offshore platforms in seismically active areas should be designed to survive severe earthquake excitations with no global structural failure. In seismic design of offshore platforms, it is often necessary to perform a dynamic analysis that accounts for nonlinear soil-pile...

... 04 03 2009 Pile foundations supporting offshore platforms and marine structures are required to resist dynamic lateral loading due to wind and wave forces. The response of a jacket offshore tower is affected by the foundation flexibility and the nonlinear behaviour of the supporting...

...Proceedings of OMAE 2003: The 22nd International Conference on Offshore Mechanics & Arctic Engineering 8-13 June, 2003, Cancun, Mexico complex deterministic manner in the experiment [5]. Because of the INTRODUCTION A wealth of complex nonlinear response behavior, including chaos, of ocean...

... 09 01 2009 Proceedings of OMAE 2003: The 22nd International Conference on Offshore Mechanics & Arctic Engineering 8-13 June, 2003, Cancun, Mexico A N Complex nonlinear response phenomena of a submerged, moored ocean structural system subjected to periodic excitations, including...

... 05 01 2009 The nonlinear dynamic response of jacket-type offshore platform (which has been installed in Persian Gulf) under simultaneously wave and earthquake loads is conducted. The interaction between soil and piles is modeled by Konagai-Nogami model. The structure is modeled...

... 05 01 2009 Pile supported offshore platforms in seismically active areas should be designed to survive severe earthquake excitations with no global structural failure. It is often required to perform nonlinear seismic analysis of offshore platforms that accounts for soil nonlinearity...

... 19 11 2008 Nonlinear response of piles is the most important source of potentially nonlinear behavior of pile-supported offshore platforms due to earthquake excitations. Earthquake design of offshore platforms is one of the main parts in offshore platforms design on which seismic soil...

... 07 10 2008 Offshore platforms in seismically active areas should be designed to survive severe earthquake excitations with no global structural failure. In seismic design of offshore platforms, it is often necessary to perform a dynamic analysis that accounts for nonlinear pile soil...