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    <title>Transport Research International Documentation (TRID)</title>
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    <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>
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      <title>Transport Research International Documentation (TRID)</title>
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      <link>https://trid.trb.org/</link>
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    <item>
      <title>PROPELLER INDUCED HULL PLATE VIBRATIONS</title>
      <link>https://trid.trb.org/View/167187</link>
      <description><![CDATA[The response of a fluid loaded plate is derived as function of the incident pressure in the fluid.  The results are compared with full scale measurements made in the aft peak tank on a ship.  Propeller induced pressure and hull plate velocity were measured with flush-mounted hydrophones and accelerometers.  It is found that for a typical aft body construction the boundaries of the plate elements can be simply supported.  The plate model agrees well with full scale measurements down to 40 Hz.  Below this frequency global vibrations determine the response of the hull.  Both theoretical and experimental results indicate that the field induced by the vibrating plate elements can be considerable.  The response of a plate can be decreased if the width of the plate is decreased or the plate thickness increased.]]></description>
      <pubDate>Fri, 12 Jun 1981 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/167187</guid>
    </item>
    <item>
      <title>COMPUTERIZED ANALYSIS OF OFFSHORE CONCRETE GRAVITY PLATFORMS</title>
      <link>https://trid.trb.org/View/167194</link>
      <description><![CDATA[Data on wind, currents and waves are briefly discussed for concrete gravity platforms in the North Sea environment.  For fluid loading on these structures, the J.R. Morison equation is initially adopted with a qualifying assumption covering drag and inertial forces.  The Keulegan-Carpenter number is considered for the relative magnitude of these forces.  A Stokes non-linear fifth order theory is adopted for a better description of the wave crest and incidental wave potential.  Two well known diffraction theories are used to evaluate and compare the pressure distribution and resulting forces and moments on these structures.  A Computer Program F-WAVE is written in Fortran IV to process results on Condeep Platform placed in water depth up to 330 m.]]></description>
      <pubDate>Fri, 12 Jun 1981 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/167194</guid>
    </item>
    <item>
      <title>PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON THE BEHAVIOR OF OFFSHORE STRUCTURES</title>
      <link>https://trid.trb.org/View/152172</link>
      <description><![CDATA[BOSS '79 is concerned with waves, currents and fluid loading, the statics and dynamics of structures, material properties and behaviour, soil mechanics and foundation engineering, and the important interactions between these disciplines.  The conference used an interdisciplinary approach, and covers both fundamental research and the experience gained in applying results to the behaviour of fixed and floating structures in exposed offshore areas. (Author)]]></description>
      <pubDate>Mon, 09 Jun 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/152172</guid>
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    <item>
      <title>NUMERICAL PREDICTION OF WAVE LOADS AND RESPONSE MOTIONS OF OFFSHORE STRUCTURES</title>
      <link>https://trid.trb.org/View/143461</link>
      <description><![CDATA[The "NMIWAVE" computer program package computes hydrodynamic added masses and damping coefficients, and the response motions of free-floating and tethered offshore platforms, for which calculation examples are given.  Fluid loads are calculated on the basis of either linear wave diffraction theory or a linearized form of "Morrison's" equation.  Order from NSFI as No. 18501.]]></description>
      <pubDate>Wed, 27 Feb 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/143461</guid>
    </item>
    <item>
      <title>PROCEEDINGS OF THE 2ND INTERNATIONAL CONFERENCE ON BEHAVIOUR OF OFFSHORE STRUCTURES</title>
      <link>https://trid.trb.org/View/90755</link>
      <description><![CDATA[Covers waves, currents and fluid loading, the statics and dynamics of structures, material properties and behaviour, soil mechanics and foundation engineering.  The emphasis is placed on fundamental research and the experience gained in applying results to the behaviour of fixed and floating structures in exposed, offshore areas.]]></description>
      <pubDate>Wed, 15 Aug 1979 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/90755</guid>
    </item>
    <item>
      <title>ESTIMATION OF FLUID LOADING ON OFFSHORE STRUCTURES</title>
      <link>https://trid.trb.org/View/72983</link>
      <description><![CDATA[This paper presents a working guide to methods and associated data for estimating loading on offshore structures due to waves and currents.  Its primary concern is with existing practice in which the formula known as J. R.  Morison's equation is used extensively, but some attention is given to diffraction theory methods adopted for large monolithic types of structure and a section on the influence of marine roughness on loading is included. Regarding Morison's equation, a comprehensive review of published data on the relevant coefficients is presented. The considerable uncertainties which still exist in some areas are stressed but advice is offered on the best values to be used in the light of current knowledge.  Other important questions discussed include the selection of appropriate wave theories and associated particle kinematics, the effects on fluid loading of proximity and inclination of structural members and the special problems of estimating impact of "slamming" forces.]]></description>
      <pubDate>Wed, 31 May 1978 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/72983</guid>
    </item>
    <item>
      <title>FLUID LOADING ON OFFSHORE STRUCTURES, A STATE OF THE ART APPRAISAL: WAVE LOADS</title>
      <link>https://trid.trb.org/View/31017</link>
      <description><![CDATA[Critical review of the problems of estimating wave loads on offshore structures.  It has been written in response to a recommendation made by the NPL Offshore Structures Fluid Loading Advisory Group (OSFLAG) and approved by the Ship and Marine Technology Requirements Board.  This called for a state of art appraisal covering the whole field of fluid loading on offshore structures including forces due to currents, winds and waves.  The present work is concerned mainly with the more important wave loads but similar papers dealing with forces due to currents and winds may follow. The primary objective was to identify research requirements, but basic concepts underlying existing practice are also stated.  The paper begins with a brief historical outline tracing development from early classical studies of steady drags in air and water to more recent work in which unsteady behaviour, such as that due to eddy shedding or wave motion plays a major role.  After a brief look at the basic mechanics of water waves, attention is then devoted to a detailed discussion of the various types of force classified as reflection, diffraction, inertia, lift and drag with an indication of the conditions in which they are significant. This leads to an appraisal of contemporary problems and research requirements.]]></description>
      <pubDate>Thu, 19 Feb 1976 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/31017</guid>
    </item>
    <item>
      <title>WAVE LOADING ON OFFSHORE STRUCTURES-THEORY AND EXPERIMENT</title>
      <link>https://trid.trb.org/View/33794</link>
      <description><![CDATA[Research aimed at helping designers of offshore structures, with special attention to large monolithic structures being developed for North Sea operation, is being carried out in Ship Division, NPL.  An account of a first phase of this work covering the development and validation of a diffraction theory computer program and some systematic commutations for various monolithic shapes has already been published.  This paper reports recent work including extensive comparisons between theory and experiment and experience in the use of the program both for research and for commercial application to practical design problems.]]></description>
      <pubDate>Thu, 19 Feb 1976 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/33794</guid>
    </item>
    <item>
      <title>A NONLINEAR THEORY OF SLOSHING IN RECTANGULAR TANKS</title>
      <link>https://trid.trb.org/View/25114</link>
      <description><![CDATA[A two-dimensional rigid, rectangular, open tank without baffles is forced to oscillate harmonically with small amplitudes of sway or roll oscillation in the vicinity of the lowest natural frequency for the fluid inside the tank. The breadth of the tank is 0 (1) and the depth of the fluid is either (1) or infinite.  The excitation is of the order epsilon and the response is of the order epsilon to the one-third.  A nonlinear, inviscid boundary-value problem of potential flow is formulated and the steady-state solution is found as a power series in epsilon to the one-third correctly to the order epsilon.  Comparison between theory and experiment shows reasonable agreement.  The stability of the steady-state solution has been studied.]]></description>
      <pubDate>Thu, 01 May 1975 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/25114</guid>
    </item>
    <item>
      <title>VIBRATORY DYNAMICS OF FLOW-EXCITED STRUTS IN WATER</title>
      <link>https://trid.trb.org/View/14619</link>
      <description><![CDATA[The general problem of the response of a cantilevered beam to flow over its surface is considered experimentally and theoretically.  The measured flow induced modal vibratory motion of a nonsinging beam is compared to theoretical estimates of inflow turbulence excitation and boundary-layer excitation.  The comparison indicates that while the response to turbulent inflow is dominant at low frequencies, the response of the strut to its own boundary layer is important at high frequencies.  The magnitude of hydrodynamically induced damping is also characterized experimentally.  It is shown that results agree favorably with an approximate expression based on finite-aspect-ratio, unsteady airfoil theory.  Loss factors, based on entrained mass, are found to be inversely proportional to a reduced frequency based on the width of the strut and inflow speed. Finally, a wind tunnel study of the statistical properties of the boundary layer formed on the strut is described. The results disclose that flow separation at the leading edge, which is sensitive to angles of attack, generates a low-frequency pressure field that is markedly higher than that normally encountered in boundary layers.  At high frequencies the pressure field is influenced by the local flow parameters normally used in boundary-layer studies.]]></description>
      <pubDate>Fri, 26 Apr 1974 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/14619</guid>
    </item>
    <item>
      <title>FORCES ON CYLINDERS OSCILLATING IN WATER</title>
      <link>https://trid.trb.org/View/9215</link>
      <description><![CDATA[A circular cylinder immersed in an infinite fluid and oscillated perpendicular to its axis is acted upon by a fluid dynamic force. This force is generally considered to be composed of two components, a drag and an added mass component.  The relative importance of these are functions of the frequency and displacement of the cylinder.  It was the purpose of the study to determine experimentally these two components as a function of the ratio of the displacement amplitude to the cylinder diameter, and the Reynolds number based on the maximum velocity.  (Author)]]></description>
      <pubDate>Wed, 31 Oct 1973 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/9215</guid>
    </item>
    <item>
      <title>TRANSIENT RESPONSE OF A POINT-EXCITED SUBMERGED SPHERICAL SHELL</title>
      <link>https://trid.trb.org/View/5542</link>
      <description><![CDATA[The transient responses of a submerged spherical shell to a concentrated impulse and Heaviside load are obtained by using the classical mode method and the Laplace transform. For long time solutions, only a relatively small number of modes are sufficient, while for the short time response, a large number of modes must be used in order to achieve acceptable accuracy.  For the lower modes, the inversion integral involves only simple poles and can be evaluated by Cauchy's residue theorem.  For the higher modes it is necessary to use asymptotic approximations and the inversion involves branch points and poles.]]></description>
      <pubDate>Sat, 27 Oct 1973 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/5542</guid>
    </item>
    <item>
      <title>METHODS FOR COMPUTING FLUID LOADING AND THE VIBRATORY RESPONSE OF FLUID-LOADED FINITE RECTANGULAR PLATES SUBJECT TO TURBULENCE EXCITATION-OPTION 3</title>
      <link>https://trid.trb.org/View/4367</link>
      <description><![CDATA[Various methods are presented for computing heavy or light fluid loading (i.e., added mass) of thin finite rectangular plates.  Based on the results, preferred methods of computation are recommended.  These methods and a corresponding computer program--Option 3--are of particular value in extending previously formulated digital computer programs for obtaining the vibroacoustic response to turbulence excitation of a plate.  Computer results are given for a particular case which includes the effect of fluid loading on the vibratory response of a plate subject to turbulence excitation.]]></description>
      <pubDate>Sat, 28 Jul 1973 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/4367</guid>
    </item>
    <item>
      <title>VIRTUAL MASS OF SUBMERGED STRUCTURES</title>
      <link>https://trid.trb.org/View/94083</link>
      <description><![CDATA[A simple experimental technique for the determination of virtual mass of partial and fully submerged structures is presented.  The virtual mass depends on the geometry of the structure and its dynamic properties in air.  Due to the surrounding water, the natural period of vibration of a structure elongates and the damping increases.  Due to the added mass of the surrounding water, the stresses and strains in the structure under dynamic conditions are increased but some relief is provided by the increased damping.]]></description>
      <pubDate>Fri, 11 May 1973 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/94083</guid>
    </item>
    <item>
      <title>ON THE DAMPING OF TRANSVERSE MOTION OF FREE-FREE BEAMS IN DENSE, STAGNANT FLUIDS</title>
      <link>https://trid.trb.org/View/12347</link>
      <description><![CDATA[The damping of free-free beams vibrating in dense, still fluids has been studied experimentally.  The decay of transverse vibration following an impulse load on the beams was dominated by viscous damping at low frequencies, both of which were measured on beams of various geometries.  The results raise considerable question concerning the validity of measuring the damping characteristics of material samples in water.  It appears that the material samples must be designed to minimize spurious fluid-damping effects, otherwise the results may be more particular to the experiment configuration than to the material itself.]]></description>
      <pubDate>Fri, 11 May 1973 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/12347</guid>
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