... platform design coefficient rao wind turbine artificial intelligence engineering prediction mavrako floater flexibility time domain wind speed floating structure equation frequency domain exciting wave force Proceedings of the Thirty-first (2021) International Ocean and Polar Engineering...

... ABSTRACT In this paper, linear frequency-domain hydroelastic analysis is performed for investigating the behavior of a spar-type supporting platform of a floating offshore wind turbine considering the platform's flexibility. A "dry" mode superposition approach is utilized, where the flexible...

... and deformation under strong winds (Yang Jann N, 2004). These structures are characterized by light weight, high flexibility, low damping and low vibration frequency. Shen et al. recent work suggests possible application of natural flapping behaviour to pursuit of turbulence reduction and energy generation (Shen...

... ABSTRACT In this study, a rigid-base single-degree-of-freedom structural model was proposed for the wind turbine with a linearly variable cross-section tower. Additionally, the concentrated spring model was introduced to simulate the flexibility of grout connection at the transition piece...

... ABSTRACT In the present paper a cyclic plasticity model accounting for multiple plastic mechanisms is developed. A flexible yield surface representation is proposed and used to implement the cyclic plasticity model in an equilibrium-based beam element accounting for local member and joint...

... the wave-induced forces. The simulation of two-dimensional solitary wave impacting onto flexible plate is finally conducted. Results from cases of the flexible and the rigid plate are compared to investigate the effects of flexibility on the wave-plate interaction. INTRODUCTION The model of wave...

... Abstract A series of large-scale FSI experiments was conducted in the Large Wave Flume at Oregon State University to study tsunami waves impacting bridges. The 1:5 bridge was tested in different configurations and the role of the flexibility of the connections and the substructure was examined...

... jonkman excitation second-order wave load upstream oil & gas simulation pitch eigenfrequency stiffness subsea system rigid tlp frequency qtf wind energy first-order wave load flexibility flexible tower eigenfrequency cutoff frequency wave load robertson renewable energy...

... for a detailed comparison and a more precise analysis of the effects of the second-order loads. aNySIM does not have the capability to model flexible bodies, so the simulations performed in this tool are done assuming a rigid body. FAST also assumes that the platform is rigid but can account for the flexibility...

... is first made for a rigid floating wind turbine without wind excitation. The investigation is further extended to examine how these RAOs change for a flexible and operational wind turbine. The RAOs are computed for below-rated, rated, and above-rated wind conditions. The method is applied to a floating...

... with substructure only, with a rigid tower representation and with a flexible tower representation. Three submerged load cells measured the response of the tendons, and two accelerometers measured the response of the total structure, being located at the substructure - tower interface and in the nacelle. The paper...

... ABSTRACT An analytical method of vibration analysis for the cracked pipe under complicated load conditions is presented in this study. The local flexibility equations of a pipe with crack at any angle under pure bending are established using the strain energy release rate theory and linear...

... to design, wind farms in deeper waters are in general less sensitive to space availability, noise restriction, visual pollution, and regulatory problems. They are also exposed to much stronger and steadier wind fields to be more effective. flexibility frequency sustainable development pitch...

... ABSTRACT Stress analyses of LNG containment system (LCS) No.96 have been conducted with the main objective of studying the effect of inner steel hull flexibility on the response of LCS No.96. Therefore, two global FE models of LCS No.96 were created with rigid and flexible inner steel hull...

... straight front crack were presented in the paper. The local flexibility equations of the pipe with a crack that straight front and part-through-the-thickness subjected to axial force, shearing force and bending moment were derived by using of theories of linear fracture mechanics. An adaptive quadrature...

... Numerical Consideration of Local Joint Flexibilities Peter Schaumann, Cord Böker ForWind Center for Wind Energy Research Institute for Steel Construction, Leibniz University of Hannover, Germany ABSTRACT In this paper, different approaches to consider local joint flexibilities in the numerical...

... appropriate ways to represent the pure production performance of a shipyard that can be used for comparing projects or different yards. INTRODUCTION In today's continuously changing and highly competitive shipbuilding markets, shipyards have been forced to become more flexible, more responsive to customer...

... of impact pressure time history were quite different when it comes to the cases of zero inclination angle and those of non-zero inclination angle. The wet drop test of the specimen of LNGC containment system can produce a lot of information on the influence of the structural flexibility and surface...

... ABSTRACT Structural damage alarming is explored by using novelty detection technique. Based on the changes of modal flexibilities, a novelty index to alarm damage is generated by a feed-forward BP neural network. A total of 12 potential damage cases in a cable-stayed bridge are simulated...

... the flexibility of the boundary points of the member is developed here. The flexibility at the ends of a tubular element is extracted using the rational `reduction of the modeling characteristics. The property reduction is based on the static condensation of the related global stiffness matrix of a model to end...