<rss version="2.0" xmlns:atom="https://www.w3.org/2005/Atom">
  <channel>
    <title>Transport Research International Documentation (TRID)</title>
    <link>https://trid.trb.org/</link>
    <atom:link href="https://trid.trb.org/Record/RSS?s=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" rel="self" type="application/rss+xml" />
    <description></description>
    <language>en-us</language>
    <copyright>Copyright © 2026. National Academy of Sciences. All rights reserved.</copyright>
    <docs>http://blogs.law.harvard.edu/tech/rss</docs>
    <managingEditor>tris-trb@nas.edu (Bill McLeod)</managingEditor>
    <webMaster>tris-trb@nas.edu (Bill McLeod)</webMaster>
    <image>
      <title>Transport Research International Documentation (TRID)</title>
      <url>https://trid.trb.org/Images/PageHeader-wTitle.jpg</url>
      <link>https://trid.trb.org/</link>
    </image>
    <item>
      <title>HYDRODYNAMIC FORCE COMPUTATIONS ON YAWED AND SURFACE-PIERCING BODIES</title>
      <link>https://trid.trb.org/View/480276</link>
      <description><![CDATA[A method of computation of the Neumann-Kelvin problem for a surface-piercing body moving at forward speed with lifting effects is presented.  The method chosen is a potential based panel method with use of the wave resistance Green's function.  To reduce the computational time of the Green's function and its derivatives, the non-oscillatory component is computed from interpolations.  A method of computation of the waterline integral, dealing with the doublet distribution and its longitudinal derivatives for a mixed distribution, has been developed.  Results are presented for simple shape wing at yaw angles and for a Wigley hull in symmetric motion.]]></description>
      <pubDate>Thu, 27 Mar 1997 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/480276</guid>
    </item>
    <item>
      <title>SIMULATION OF NONLINEAR WAVES AND FORCES DUE TO TRANSIENT AND STEADY MOTION OF SUBMERGED SPHERE</title>
      <link>https://trid.trb.org/View/480316</link>
      <description><![CDATA[This paper presents a time domain simulation of fully nonlinear waves and nonlinear hydrodynamic forces that are generated by a submerged sphere in a transient and steady motion near the free surface.  A higher-order boundary element method previously developed in the frequency domain was further developed to solve the boundary integral equation in the time domain.  The multiple node technique was applied on elements in the neighbourhood of the edges and corners of the truncated rectangular numerical wave tank. Orlanski's open boundary condition was modified in association with the boundary element method to satisfy the radiation conditions at the upstream and downstream boundary.  The initial force variation provides the impacting hydrodynamic force (added mass) and the near-steady forces give the averaged steady nonlinear hydrodynamic forces.  The nonlinear stern wave appears to be steep and asymmetric and its progressing speed is faster than that of the linear one.]]></description>
      <pubDate>Thu, 27 Mar 1997 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/480316</guid>
    </item>
    <item>
      <title>WAVE FORCES ON A SUBMERGED SPHERE BY BICHROMATIC WAVES</title>
      <link>https://trid.trb.org/View/480317</link>
      <description><![CDATA[This paper discusses experimentally the wave forces acting on a submerged sphere due to bichromatic waves.  Discussion is centred on the drag and inertia coefficients of the Morison equation, determined by the least square method.  In the analysis, two interpretations of the drag and inertia coefficients are determined. One set determined is for each wave determined by the zero- downcrossing method while the other set is for whole waves in a wave train.  Based on the results, it is shown that the time variation of wave height plays an important role on the wave forces for zero- downcrossing waves.  The maximum wave force and the inertia coefficient of the waves whose heights are increasing are larger than those corresponding to waves whose heights are decreasing. Differences of the drag coefficient between the waves in these two stages are also recognized, however, tendencies depend on flow separation.  The differences of these quantities become large with increasing variation coefficient of wave height and decreasing correlation coefficient of wave height of successive waves, and it is pointed out that the effect of irregularity in the wave train should be taken into consideration for accurate estimation of wave forces.]]></description>
      <pubDate>Thu, 27 Mar 1997 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/480317</guid>
    </item>
    <item>
      <title>HYDRODYNAMIC FORCES INDUCED BY A SOLITARY WAVE ON A SUBMERGED CIRCULAR CYLINDER</title>
      <link>https://trid.trb.org/View/480326</link>
      <description><![CDATA[A numerical two dimensional wave basin has been developed in the framework of potential theory of nonlinear free-surface flows. This general purpose computer code was used in this study to investigate systematically the interaction between a solitary wave and a fixed submerged circular cylinder.  For a given submergence, different flow evolutions were encountered; their features are shown to depend on soliton amplitude and cylinder diameter.  A quantitative study of hydrodynamic forces during the interaction is also presented.]]></description>
      <pubDate>Thu, 27 Mar 1997 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/480326</guid>
    </item>
    <item>
      <title>THE RANKINE SOURCE METHOD APPLIED TO THE DETERMINATION OF THE POTENTIAL FLOW AROUND A SUBMERGED BODY WITH CONSTANT FORWARD VELOCITY</title>
      <link>https://trid.trb.org/View/480708</link>
      <description><![CDATA[This paper presents a procedure for selecting between the double-body or the Neumann-Kelvin condition for the case of a submerged body moving horizontally with constant forward velocity, based on the approximation of this flow at points distant from the body by the flow due to a moving dipole.  The proposed approximation is exemplified for a 2-D body.  Depending on the intensity and submergence of the resulting dipole, the Neumann- Kelvin or the double-body linearization has to be applied.  The free- surface disturbances are represented by two known techniques: the discrete distribution of point Rankine sources just above the free surface, and the adoption of a parabolic spline continuous variation of the potential over the free-surface.  Already proposed suggestions were followed to prevent waves from propagating upstream.  In the case of the point sources representation, numerical damping was introduced by shifting the collocation points upstream of the sources. In the case of the continuous representation of the potential, boundary conditions were imposed upstream of the submerged singularities.]]></description>
      <pubDate>Thu, 27 Mar 1997 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/480708</guid>
    </item>
    <item>
      <title>PREDICTION OF NONLINEAR MOTION RESPONSES OF A SUBMERGED SLENDER BODY RUNNING NEAR FREE-SURFACE DUE TO WAVE-EXCITING FORCES</title>
      <link>https://trid.trb.org/View/480984</link>
      <description><![CDATA[In the modelling and prediction of nonlinear motion responses of a submerged slender body running near the water-surface due to wave-exciting forces, it was found that the mean drift wave forces can make the submerged body move upwards.  In some cases, it may emerge from the water if the control forces of the manoeuvring system (rudders) cannot offset the mean drift forces. The calculated results are in good agreement with those obtained from the self propeller model tests in oblique seas.]]></description>
      <pubDate>Thu, 27 Mar 1997 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/480984</guid>
    </item>
    <item>
      <title>WAVEMAKING RESISTANCE OF A GROUP OF SUBMERGED SPHERES</title>
      <link>https://trid.trb.org/View/467498</link>
      <description><![CDATA[The hydrodynamic problem associated with a group of submerged spheres moving with the same constant speed (or stationary spheres in a uniform current) is analyzed based on the linearized velocity potential theory.  There is no restriction on the submergences and radii of the spheres, or on distances between the spheres.  The solution is obtained by using the multipole expansion method.  The results are obtained for resistance, lifts, and attraction forces between the spheres.  The horizontal forces are also compared with the far-field equations derived in this paper and excellent agreement has been found.]]></description>
      <pubDate>Mon, 04 Nov 1996 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/467498</guid>
    </item>
    <item>
      <title>THE INTERACTION OF WATER WAVES WITH A GROUP OF SUBMERGED SPHERES</title>
      <link>https://trid.trb.org/View/467538</link>
      <description><![CDATA[The hydrodynamic problem associated with water wave radiation and diffraction by a group of submerged spheres is analyzed based on the linearized velocity potential.  There is no restriction on the submergences and radii of the spheres, or the distances between spheres.  The solution is obtained by using the multipole expansion method.  Results are obtained for added masses, damping coefficients, wave exciting force and drift force. They have been checked using various identities and far-field equations and excellent agreement has been found.]]></description>
      <pubDate>Mon, 04 Nov 1996 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/467538</guid>
    </item>
    <item>
      <title>WAVE SCATTERING BY SUBMERGED ELLIPTICAL DISK</title>
      <link>https://trid.trb.org/View/467055</link>
      <description><![CDATA[The diffraction of small-amplitude surface waves by a horizontally submerged disk of elliptic cross section located at a finite depth beneath the free surface is investigated analytically.  The fluid domain is divided into three regions, two internal regions, one above and one beneath the disk, and an external region extending to infinity in the horizontal plane.  The theoretical formulation leads to solutions for the fluid velocity potentials in each region in terms of series of Mathieu and modified Mathieu functions of real argument.  Numerical results are presented for the wave-induced forces and moments, and the variation of water surface elevation in the vicinity of the disk for a range of wave and structural parameters.  In particular, the results for the hydrodynamic loads show significant differences from the corresponding estimates for a circular disk, while the results for the water surface elevation clearly show the effect of wave focusing around the rear of the disk.]]></description>
      <pubDate>Fri, 01 Nov 1996 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/467055</guid>
    </item>
    <item>
      <title>NONLINEAR FREE-SURFACE FLOW COMPUTATIONS FOR SUBMERGED CYLINDERS</title>
      <link>https://trid.trb.org/View/456276</link>
      <description><![CDATA[A numerical method involving isolated sources located outside the flow domain is used to compute potential flows in two dimensions involving the nonlinear water-wave boundary condition.  The method is tested on Stokes waves, and then used on steady streaming flows about submerged cylinders.  The circular cylinder with an without circulation is discussed for a range of submergences and Froude numbers.  Emphasis is placed on the special choices of circulation for which the net vertical force is small and the amplitude of downstream waves is reduced.]]></description>
      <pubDate>Wed, 27 Mar 1996 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/456276</guid>
    </item>
    <item>
      <title>EXPERIMENTAL AND NUMERICAL METHODOLOGIES IN SHIP DESIGN</title>
      <link>https://trid.trb.org/View/456510</link>
      <description><![CDATA[In this paper the hydrodynamic behaviour, from the wave resistance view point, of simple submerged bodies is studied by means of experimental techniques and numerical methods.  This work is the first approach to the SWATH hydrodynamic behaviour evaluation.  The experimental investigation is carried out according to the longitudinal cut method, and the numerical approach is based on the integral formulation of the potential flow model.  The results obtained are presented and discussed, for simple shaped bodies as well as four coupled bodies with struts.]]></description>
      <pubDate>Wed, 27 Mar 1996 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/456510</guid>
    </item>
    <item>
      <title>WAVE-POWER ABSORPTION BY A LINE OF SUBMERGED HORIZONTAL CYLINDERS</title>
      <link>https://trid.trb.org/View/456762</link>
      <description><![CDATA[This paper considers the radiation of water waves by a submerged, horizontal circular cylinder in a channel.  The cylinder axis is perpendicular to the channel walls and the length of the cylinder is less than the width of the channel.  The method of solution combines both multipole and eigenfunction expansions.  The effects of finite cylinder length and of the channel walls are discussed and application is made to a line of Bristol cylinder wave power devices.]]></description>
      <pubDate>Wed, 27 Mar 1996 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/456762</guid>
    </item>
    <item>
      <title>WAVE BREAKING OVER SUBMERGED HORIZONTAL PLATE</title>
      <link>https://trid.trb.org/View/455870</link>
      <description><![CDATA[The inceptive condition for wave breaking over a submerged horizontal plate is proposed.  The establishment of the breaking inceptive condition is based on an empirical formula for partial standing waves breaking in uniform water depth.  To determine the relation between the local waves over the plate and the incident wave, linear analysis is employed and a modification is then made to take into account the nonlinear effect.  A laboratory experiment is carried out to verify the semi-empirically established breaking condition, and satisfactory agreement between the semi-empirical prediction and the experimental observation is obtained.]]></description>
      <pubDate>Mon, 04 Mar 1996 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/455870</guid>
    </item>
    <item>
      <title>THE CONCEPTS OF ADDED MASS AND INERTIA FORCES AND THEIR USE IN STRUCTURAL DYNAMICS</title>
      <link>https://trid.trb.org/View/455162</link>
      <description><![CDATA[A discussion on the concepts of added mass and inertia forces is provided combined with illustrative examples. The paper relates to submerged circular cylinders - single or in groups - only, and from an assessment of measured forces and analytical developments it is advocated that the added mass values determined from potential flow theory are adequate also for real flows. A procedure for determining the added mass coefficients for single cylinders and groups of cylinders has been developed and results are given for 4 different configurations.]]></description>
      <pubDate>Wed, 28 Feb 1996 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/455162</guid>
    </item>
    <item>
      <title>NONLINEAR WAVE REFLECTION FROM A SUBMERGED CIRCULAR CYLINDER</title>
      <link>https://trid.trb.org/View/455177</link>
      <description><![CDATA[The paper discusses analytically the nonlinear wave reflection caused by a circular cylinder, submerged under a free surface in water of infinite depth.  For monochromatic incident waves it is shown that there is no reflection of order m and frequency mw (m integer).  This means that the dominant part of the mode of frequency mw is not reflected.  For bichromatic incident waves it is found that the second-order wave with 'sum-frequency' has no reflection.  It is shown that the x- and y- components of the oscillatory force of order m and frequency mw have identical amplitudes and a phase-difference one halfpi.  A corresponding result is also true for bichromatic waves.]]></description>
      <pubDate>Wed, 28 Feb 1996 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/455177</guid>
    </item>
  </channel>
</rss>