<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>A STUDY ON THE NON-LINEAR HYDRODYNAMIC FORCES ACTING ON A RECTANGULAR CYLINDER OSCILLATING WITH A LARGE AMPLITUDE</title>
      <link>https://trid.trb.org/View/391547</link>
      <description><![CDATA[In this paper, the non-linear hydrodynamic forces acting on a rectangular cylinder are studied. The rectangular cylinder is heaving with a large amplitude in the vicinity of the free surface. The first- second- and third-order experimental results are compared with the corresponding calculated results. The procedure of the calculation is based on the theory where the free surface elevation is assumed small. It is also assumed that the interval of impulsive motions is small. It is found through experiments that flow patterns of the flood on the rectangular cylinder caused by its heaving motion are significant. The calculations where the flood effects are taken into account show good results.]]></description>
      <pubDate>Thu, 21 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/391547</guid>
    </item>
    <item>
      <title>ANALYSIS OF TWO-DIMENSIONAL ELASTIC PROBLEM HAVING STIFFENER BY BOUNDARY ELEMENT METHOD</title>
      <link>https://trid.trb.org/View/391548</link>
      <description><![CDATA[The boundary element method (BEM) is a method of numerical analysis that, in comparison with the finite element method, requires fewer data and less calculation time. Many papers have already been published involving the application of BEM to the analysis of two dimensional elastic problems. Though, in practice, stiffeners exist on the boundary of most such problems, past work has not investigated them.  In this paper, the authors have developed an analysis of two-dimensional elastic problems having stiffeners on the boundary and have used a new element, namely, a non-conforming double nodes element. For a two-dimensional membrane plate, they compare the accuracy of this method with that of analysis involving a conforming element and the finite element method, and apply the method, with satisfactory results, to the calculation of stress around a slot.]]></description>
      <pubDate>Thu, 21 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/391548</guid>
    </item>
    <item>
      <title>STRENGTH OF CATAMARAN SHIP (3RD REPORT): WAVE INDUCED STRESSES ACTING ON CONNECTING DECK</title>
      <link>https://trid.trb.org/View/391549</link>
      <description><![CDATA[The catamaran ship has twin hulls and a connecting deck. Stiffness of the deck is generally very small compared with that of each hull. Therefore, to analyze the motions of an ocean going catamaran in waves, the effect of elastic deformation of the deck cannot be neglected. In the 1st report, which considered forces and moments acting in the connecting deck induced by the relative motions of the twin hull, motions of each hull in waves were analyzed. It was found that loads acting in the deck owing to relative motions of the twin hulls became largest in transverse waves and hydrodynamic interaction between the twin hulls could not be neglected.  In the 2nd report, which considered the hydrodynamic interaction between the twin hulls and the elastic deformation of the deck, motions of each hull in transverse and oblique waves were analyzed and the loads acting in the deck owing to relative motions of the twin hulls were investigated. The connecting deck is acted upon by two kinds of wave-induced stresses. The first is stress by elastic deformation due to relative motions of the twin hulls. The other is stress by elastic deformation of the hull structure and deck, attributable to dynamic pressure and inertia forces acting on the ship, induced by motions of the twin hulls in waves. In this report, those wave- induced stresses acting in the deck were analyzed and the effect of scantling and stiffness of the connecting deck and the twin hulls on the stresses in the deck were investigated.]]></description>
      <pubDate>Thu, 21 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/391549</guid>
    </item>
    <item>
      <title>A STUDY OF HYDRODYNAMIC DAMPERS TO REDUCE SHIP VIBRATION</title>
      <link>https://trid.trb.org/View/391550</link>
      <description><![CDATA[This paper presents conclusions from experimental and theoretical investigations of two types of dynamic dampers for reducing ship vibration: a U-type hydrodynamic vibration damper and a spring and hydrodynamic type.]]></description>
      <pubDate>Thu, 21 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/391550</guid>
    </item>
    <item>
      <title>A CONSIDERATION ON FATIGUE STRENGTH OF NOTCHED STEEL PLATES BASED ON CRACK INITIATION LIFE (CONTINUED REPORT): IN THE CASE OF SMALL VALUES OF STRESS CONCENTRATION FACTOR</title>
      <link>https://trid.trb.org/View/391551</link>
      <description><![CDATA[In a previous paper, the relation between fatigue strength based on crack initiation life and the stress concentration factor and the elastic stress gradient was clarified for cases where the stress concentration factor was large. This paper details investigations of the effect of the stress concentration factor and the elastic stress gradient on the fatigue strength based on crack initiation life for cases where the stress concentration factor was small. Repeated tensile fatigue tests for SS41 steel plates were carried out in the intermediate cycle range and the conclusions from these tests are presented.]]></description>
      <pubDate>Thu, 21 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/391551</guid>
    </item>
    <item>
      <title>BASIC SHIP DESIGN SYSTEM BY PERSONAL COMPUTER</title>
      <link>https://trid.trb.org/View/391813</link>
      <description><![CDATA[CAD (Computer Aided Design) and CAM (Computer Aided Manufacturing), as developed in various shipyards, has for the most part utilized large or medium-sized computers. Small computers, however, have come to offer such performance and convenience that they, too, hold great possibilities in the field of ship design. This article describes an attempt to develop a basic ship design system on a personal computer, to arrive at lines, and calculate and draw hydrostatic, stability and longitudinal strength curves.]]></description>
      <pubDate>Thu, 21 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/391813</guid>
    </item>
    <item>
      <title>AN ESTIMATION METHOD OF FORM FACTOR AND WAKE CHARACTERISTICS BY USE OF POTENTIAL FLOW CALCULATION</title>
      <link>https://trid.trb.org/View/391814</link>
      <description><![CDATA[This article presents one method of estimating form factor and wake characteristics based on parameters derived from potential flow calculation. Three factors were considered in connection with wake characteristics: (1) bilge vortex center and wake value there; (2) effective wake; and (3) wake peak value on centerline. Further, an application of this method to stern design for the improvement of propulsive performance and propeller exciting force is described.]]></description>
      <pubDate>Thu, 21 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/391814</guid>
    </item>
    <item>
      <title>MATHEMATICAL MODEL FOR THE MANOEUVRING SHIP MOTION IN SHALLOW WATER</title>
      <link>https://trid.trb.org/View/391815</link>
      <description><![CDATA[Maneuvering behavior significantly changes according to water depth. An examination of safety in harbor navigation therefore requires clarification of the characteristics of ship motion in shallow water.  Following the full-scale trials of the ESSO OSAKA, many model tests were performed to observe the characteristics of hydrodynamic forces acting on hull or rudder. These hydrodynamic data are insufficient, however, for the prediction of maneuvering motion in shallow water, and more theoretical approaches have been desired in addition to experimental data. In this article, the predicting techniques are investigated based on the well-known MMG's mathematical model.]]></description>
      <pubDate>Thu, 21 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/391815</guid>
    </item>
    <item>
      <title>THEORETICAL PREDICTIONS AND FULL SCALE MEASUREMENTS FOR PROPULSIVE PERFORMANCE OF OCEAN-GOING SHIPS</title>
      <link>https://trid.trb.org/View/391816</link>
      <description><![CDATA[Full scale measurements were made of the propulsive performance of three ships: a bulk carrier on the Japan-Australia route, and a bulk carrier and containership on the Japan-North America route. These were compared with computed predictions as to speed loss, power requirements and fuel consumption on the sea routes in different seasons. Conclusions are detailed in this article.]]></description>
      <pubDate>Thu, 21 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/391816</guid>
    </item>
    <item>
      <title>WAVE GROUPINESS AND ITS EFFECT ON THE SLOW DRIFT OSCILLATIONS OF A MOORED BODY</title>
      <link>https://trid.trb.org/View/391817</link>
      <description><![CDATA[When the period of grouped waves is close to the natural frequency of a moored body, large slow drift oscillations of the body can be expected to occur. Several wave generation techniques that allowed the controlled formation of grouped waves in the experimental tank were investigated and the slow drift oscillation of a moored body in those waves was measured.  Results indicate the need to take wave groupiness into account in determining the maximum values for such oscillations.]]></description>
      <pubDate>Thu, 21 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/391817</guid>
    </item>
    <item>
      <title>CHARACTERISTICS OF FLOW FIELD IN STERN'S NEIGHBORHOOD UNDER MANEUVERING MOTION</title>
      <link>https://trid.trb.org/View/394985</link>
      <description><![CDATA[The authors describe research on the interference effects among hulls, propellers, and rudders for the purpose of refining a mathematical model (MMG model) for the maneuvering of ships.]]></description>
      <pubDate>Thu, 21 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/394985</guid>
    </item>
    <item>
      <title>STUDY ON AN APPROXIMATE CALCULATION METHOD OF RESISTANCE INCREASE IN OBLIQUE REGULAR WAVES</title>
      <link>https://trid.trb.org/View/394986</link>
      <description><![CDATA[A theoretical prediction method for calculating the resistance increase of a ship in oblique regular waves is investigated in this paper. Two kinds of approximate formulas on second-order steady- state forces are derived by using the momentum principle, and two kinds of approximate expressions of resistance increase are obtained from these approximate formulas. Furthermore, numerical calculations on resistance increase are carried out using a container ship and a bulk carrier. The results of the calculations are compared with the results of model experiments which were done at the Tsu Ship Model Basin.]]></description>
      <pubDate>Thu, 21 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/394986</guid>
    </item>
    <item>
      <title>BOUNDARY LAYER MEASUREMENTS AND EVALUATION OF VISCOUS RESISTANCE COMPONENTS ON FULL HULL FORMS</title>
      <link>https://trid.trb.org/View/394987</link>
      <description><![CDATA[A three-dimensional turbulent boundary layer on several ship hulls, whose stern forms are changed systematically, is calculated by a simple integral-type prediction method with small crossflow assumption, and is measured by three-hole Pitot tube in a circulating water channel. The viscous resistance components due to streamwise momentum loss in the boundary layer and stern bilge vortices are evaluated by Himeno's method.  The usefulness of the estimation method of viscous resistance is examined in stern-form design problems. A change of the frameline shape at the stern affects not only the crossflow in the boundary layer and the strength of the longitudinal vortices, but also the streamwise momentum loss. The viscous resistance becomes small by reducing the fullness of the stern shoulder.]]></description>
      <pubDate>Thu, 21 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/394987</guid>
    </item>
    <item>
      <title>MEASUREMENT OF UNSTEADY WAKE VELOCITY AT SHIP-MODEL STERN</title>
      <link>https://trid.trb.org/View/394988</link>
      <description><![CDATA[In order to clarify the characteristics of the unsteady wake of a ship in waves, the velocity distributions at a stern section of a ship model in forced pitching motion or in incident head waves are measured by use of a propeller-type velocimeter. It is found that the variation of the time-mean velocity in pitching motion increases near the propeller position and decreases near the bottom and the water line region. The profiles of time-mean velocity in unsteady flow are similar to those of steady boundary layers. The oscillating velocity component is found to be comparable to the unsteady Stokes' solution for an oscillating flat plate, although the theoretical values are slightly different from the measured one in case of pitching motion. The result of the measurement, however, indicates that the viscous effect of the unsteady wake velocity is restricted within the region of the steady boundary layer along the hull.]]></description>
      <pubDate>Thu, 21 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/394988</guid>
    </item>
    <item>
      <title>SINGLY-NONORTHOGONAL COORDINATE SYSTEM FOR REYNOLDS EQUATIONS AND ITS APPLICATION TO THE FLOW CALCULATION AROUND A SHIP MODEL</title>
      <link>https://trid.trb.org/View/394989</link>
      <description><![CDATA[A singly-nonorthogonal coordinate system for Reynolds equations is derived in order to perform the calculation of the flows around ship hulls precisely and economically. In this coordinate system, the angle between the X1 and X2 axis on the body surface, or the angle between the X1 axis on the body surface and the X3 axis taken as the distance from the surface, need not be orthogonal, but the others are perpendicular to each other. Using this coordinate system, boundary layer calculations are performed around a ship model whose hull form is represented mathematically, and these results are compared with experimental data.]]></description>
      <pubDate>Thu, 21 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/394989</guid>
    </item>
  </channel>
</rss>