Browsing Journal of Offshore Mechanics and Arctic Engineering by Issue Date

Now showing items 1-20 of 1997

      • Diffraction and Refraction of Nonlinear Waves by the Green–Naghdi Equations 

        Hayatdavoodi, Masoud; Cengiz Ertekin, R. (The American Society of Mechanical Engineers (ASME), 10/25/2022)
        Diffraction and refraction of nonlinear shallow water waves due to uneven bathymetry are studied by use of the Green–Naghdi (GN) equations in three dimensions. A numerical wave tank consisting of deep, transitional, and ...

      • Linear Quadratic Regulator Optimal Control of Two-Rotor Wind Turbine Mounted on Spar-Type Floating Platform 

        El Beshbichi, Omar; Xing, Yihan; Chen Ong, Muk (The American Society of Mechanical Engineers (ASME), 10/7/2022 )
        Interest is steadily growing for multi-rotor wind turbine concepts. This type of wind turbine offers a practical solution for scaling issues of large wind turbine components and for the reduction of costs associated with ...

      • Second-Order Diffraction Loads on Plural Vertical Cylinder With Arbitrary Cross Sections 

        K. Masuda; H. Ishizuka; W. Kato (The American Society of Mechanical Engineers (ASME), 1987)
        The purpose of the present study is development of a powerful numerical method for calculating second-order diffraction loads on plural vertical cylinder with arbitrary cross sections. According ...

      • A Methodology for the Determination of Drag Coefficients for Ice Floes 

        O. S. Madsen; M. S. Bruno (The American Society of Mechanical Engineers (ASME), 1987)
        Governing equations are derived for the response of partially ice-covered continental shelf waters to atmospheric and tidal forcing. The assumptions underlying these equations are discussed, with ...

      • Hydrodynamic Impact Analysis of a Cylinder 

        R. Cointe; J.-L. Armand (The American Society of Mechanical Engineers (ASME), 1987)
        The problem of the vertical entry of a rigid horizontal cylinder into an incompressible inviscid fluid initially at rest is addressed. The contributions of previous researchers are presented and ...

      • A Hybrid Integral Equation Method for Wave Forces on Three-Dimensional Offshore Structures 

        M. M. F. Yuen; F. P. Chau (The American Society of Mechanical Engineers (ASME), 1987)
        Wave forces on arbitrary-shaped three-dimensional offshore structures are analyzed by the proposed hybrid integral equation method. Eigenfunction expansion is used to represent velocity potential ...

      • Dynamics of Flexible Hose Riser Systems 

        H. Vogel; B. J. Natvig (The American Society of Mechanical Engineers (ASME), 1987)
        The paper describes a highly effective method for computing the dynamics of the catenary-shaped suspension of flexible hose systems. The method accounts for a number of nonlinearities, it is ...

      • Stability Analysis to Predict Vortex Street Characteristics and Forces on Circular Cylinders 

        G. Triantafyllou; M. Triantafyllou; C. Chryssostomidis (The American Society of Mechanical Engineers (ASME), 1987)
        The characteristics of the wake are predicted accurately by the critical point of the absolute instability supported by the wake profiles immediately behind the cylinder. Measured profiles at ...

      • Statistical Properties of Directional Sea Measurements 

        C. T. Stansberg (The American Society of Mechanical Engineers (ASME), 1987)
        The statistical variability of directional sea estimates is considered. A general, but brief study in the mean and variance of the spatial coherence estimate is first presented. This function ...

      • On the Length of the Transition Zone in Unconfined Buckle Propagation 

        S. U. Bhat; T. Wierzbicki (The American Society of Mechanical Engineers (ASME), 1987)
        When a buckle propagates down an underwater pipeline due to excessive hydrostatic pressure, the permanent plastic deformations and sectional collapse of the tube are restricted to a finite length ...

      • A Flexural and Longitudinal Elastic Wave Propagation Theory Applied to Ice Floe Impact With Sloping Structures 

        C. H. Luk (The American Society of Mechanical Engineers (ASME), 1987)
        This paper presents a one-dimensional flexural and longitudinal elastic wave propagation theory for analysis of ice floe impact with a rigid structure having a constant slope. In this paper, ...

      • Model Studies of Wave-Seabed Interactions 

        T. R. Chari; C. R. Dawe; S. A. Barbour (The American Society of Mechanical Engineers (ASME), 1987)
        Several factors such as the wave characteristics, the seabed type, the sediment size, and the porosity characteristics influence the transient porewater pressure response below the mudline due ...

      • Technical Editor’s Page 

        S. K. Chakrabarti (The American Society of Mechanical Engineers (ASME), 1987)

      • Wave Drift Enhancement Effects for Semisubmersible and TLP Systems 

        R. Eatock Taylor; S. M. Hung (The American Society of Mechanical Engineers (ASME), 1987)
        Hydrodynamic interactions between the component bodies of a multi-body offshore system can cause substantial enhancement of certain load effects, such as mean horizontal drift forces and radiation ...

      • Wave Force Analysis by the Finite Element Method 

        K. Imai; Y. Riho; T. Matsumoto; T. Takahashi; K. Bando (The American Society of Mechanical Engineers (ASME), 1987)
        The finite element method is applied to determine the wave forces and wave fields for various coastal and ocean structures. Wave diffraction and radiation problems are solved by the method. A ...

      • The Stress Analysis and Experimental Research of Tubular K-Joints With Overlap 

        Tie-yun Chen; Wei-min Chen (The American Society of Mechanical Engineers (ASME), 1987)
        The geometry of overlapping tubular joints, the equations of intersection curves and the coordinate of the intersection point are introduced first. The variational method for simple tubular joints ...

      • Vortex-Induced Vibrations due to Steady and Wave-Induced Currents of a Flexible Cylinder Near a Plane Boundary 

        D. T. Tsahalis (The American Society of Mechanical Engineers (ASME), 1987)
        Model tests were performed in a wave tank to determine the effect of combined steady and wave-induced currents and/or proximity of a plane boundary (seabottom) on the vortex-induced vibrations ...

      • Analysis of High-Frequency Vibration of Tension Leg Platforms 

        R. P. Nordgren (The American Society of Mechanical Engineers (ASME), 1987)
        The dynamic response of a tension leg platform is studied using spectral analysis techniques. Equations of motion are derived for the rigid platform and its legs which are idealized as cables ...

      • The Effect of Tether Damage on Tension Leg Platform Dynamics 

        M. Booton; N. Joglekar; M. Deb (The American Society of Mechanical Engineers (ASME), 1987)
        The design of a tension leg platform (TLP) provides for tethers of equal stiffness at each corner. Damage to the tethers results in a loss of stiffness and consequently a change in the ...

      • An Analysis of Water Shipping Between Two Floating Platforms in the Beam Waves 

        M.-C. Fang; C. H. Kim (The American Society of Mechanical Engineers (ASME), 1987)
        This paper presents a frequency domain method for predicting the relative wave elevation due to the hydrodynamic interaction between two floating structures in the beam waves. The strip method ...