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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>A GUIDE TO GENERIC SEAKEEPING PERFORMANCE ASSESSMENT</title>
      <link>https://trid.trb.org/View/168462</link>
      <description><![CDATA[Can a Destroyer displacing 6,000 tons provide a motion environment fully supportive of combat operations in a Sea State 6?  This question is one of generic seakeeping performance assessment.  The paper provides guidelines for answering such questions.  The inter-relationships between hull size, hull configuration, and the ability of the hull to support combat operations, to maintain speed, and to survive in a seaway are explored.  Results are presented graphically as envelopes of attainable performance versus hull size with the scope of the envelope at a given size representing the influence of hull configuration. These performance envelopes can be utilized at the earliest stages of the ship design process.  The range of hull sizes required to attain a given performance level or the performance levels attainable at a given hull size can be determined.  Further, the feasibility of satisfying constraints on both size and performance can be evaluated or such constraints can be imposed in a rational manner.]]></description>
      <pubDate>Thu, 21 May 1981 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/168462</guid>
    </item>
    <item>
      <title>HYDRODYNAMIC RESEARCH AND FLOATING PIPELAYING EQUIPMENT</title>
      <link>https://trid.trb.org/View/156170</link>
      <description><![CDATA[For laying gas and oil pipelines offshore from floating structures under severe environmental conditions, various concepts were developed and made operational during the last ten years.  For the North Sea area these concepts vary from conventional barges, ship-shaped hulls, small semi-submersibles to large, highly sophisticated semi-submersible pipelaying vessels.  Already in the preliminary stage of the development extensive engineering and research work are to be done to establish its optimal workability and to select the final concept.  The workability of a concept is mainly determined by its motions and forces caused by wind, waves and current.  To establish the hydrodynamic merits of a concept several mathematical methods as well as model techniques are available.  The objective of the present paper is to review the various mathematical methods and to correlate the results thereof with model tests and prototype data.  Special attention is given to the applicability of these prediction methods with respect to dimensions and transparency of the different structures.  Finally, the role of model testing in hydrodynamic research for pipelaying equipment will be discussed.  The combined influence of barge motions and wave action on different stinger configurations as well as the behaviour of the pipeline will be considered.]]></description>
      <pubDate>Wed, 08 Oct 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/156170</guid>
    </item>
    <item>
      <title>PREDICTING HYDRODYNAMIC BEHAVIOR OF SMALL WATERPLANE AREA, TWIN HULL SHIPS</title>
      <link>https://trid.trb.org/View/151904</link>
      <description><![CDATA[Existing naval and commercial Small Waterplane Area, Twin-Hull (SWATH) vessels are described along with the reasons for choosing this type of hull configuration.  The effects of changes in hull form and proportions on smooth water resistance and motions in rough water are examined. Analytical and experimental techniques presently available for use in the design process are discussed.  Simple relationships for use in predicting resistance and seakeeping behavior in early stages of design are presented.]]></description>
      <pubDate>Wed, 08 Oct 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/151904</guid>
    </item>
    <item>
      <title>SEAKEEPING BY DESIGN</title>
      <link>https://trid.trb.org/View/154050</link>
      <description><![CDATA[Seakeeping is the ability of our ships to go to sea, and successfully and safely execute their missions despite adverse environmental factors.  Those few words identify the two major issues facing the operator today and provide the focus for all subsequent seakeeping efforts within the design community at the Naval Sea Systems Command (NAVSEA). For it is these two issues of mission success and safety at sea which are addressed within NAVSEA, for each new ship design and for ships in the Fleet, in terms of: SEAKEEPING PERFORMANCE--Ability to execute mission in a sea environment, and SEAWORTHINESS--Ability to survive in an extreme sea environment.  In the past, the design of ships exhibiting superior seakeeping performance and seaworthiness has been looked upon by many as an art or an academic exercise.  The objective of this paper then is to demonstrate clearly that the ability of our ships to execute their missions successfully and safely in a sea environment is not by chance but by design.]]></description>
      <pubDate>Thu, 26 Jun 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/154050</guid>
    </item>
    <item>
      <title>CONTAINERSHIP DESIGN PROBLEMS</title>
      <link>https://trid.trb.org/View/153367</link>
      <description><![CDATA[The Author first presents a general survey of the many problems affecting the design and construction of container ships, and discusses them with particular reference to stability, probably the most important criterion from the shipyard viewpoint.  A detailed examination, occupying most of the paper, is then made of the various design problems and their solutions, under the headings: 1--The Development of Ship Form and Propulsion Arrangements.  2--Hull Configuration (2.1--Sub-Division.  2.2--Hull Structure). 3--Choice of Propulsion Installation.  Under these headings, a number of different designs of Panamax and other container ships are discussed from the dimensional, hydrostatic, hydrodynamic, and structural points of view, and a considerable amount of data is given, mostly in graphs, to enable assessments to be made (the Author deliberately avoids making recommendations).  In the discussion on the choice of propulsion installation, both the type of prime mover and the number of propellers are briefly considered, and it is mentioned that the high-speed single-screw ship is likely to be increasingly in demand during the 1980s.  Order from BSRA as No. 52,237.]]></description>
      <pubDate>Wed, 07 May 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/153367</guid>
    </item>
    <item>
      <title>THE STEPCHILD OF R AND D - THE DISPLACEMENT MONOHULL</title>
      <link>https://trid.trb.org/View/77880</link>
      <description><![CDATA[This paper demonstrates the need for a comprehensive Advanced Development RDT and E Program in the area of the hydrodynamic design of Displacement monohulls for naval surface ships, and outlines a proposed Surface SHIP (Ship Hydrodynamics - Improved Performance) R and D Program which will fulfill this need.]]></description>
      <pubDate>Tue, 27 Feb 1979 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/77880</guid>
    </item>
    <item>
      <title>THE BSRA METHODICAL SERIES-AN OVERALL PRESENTATION. VARIATIONS IN PARALLEL MIDDLE BODY</title>
      <link>https://trid.trb.org/View/73837</link>
      <description><![CDATA[Previous papers have described overall presentations and detailed experiment results of the B.S.R.A.  Methodical Series hull forms (references at end of paper).  The present paper contains an overall analysis of the resistance and propulsion results obtained with models derived from the 0.65, 0.70, 0.75 and 0.80 block coefficient parent forms of the B.S.R.A.  Methodical Series in which the extent of parallel middle body was systematically varied.  Charts are presented from with corrections to the resistance coefficients, due to variations in parallel middle body, can be determined.  These corrections apply strictly to the original series, but it is considered that they are a reasonable approximation for the Extended and Revised B.S.R.A.  Methodical Series within the corresponding range of block coefficient.  For the purposes of the present paper the propulsive coefficients are given in the form of cross curves.  A worked example to illustrate the use of the diagrams is given in the Appendix.  Order from: BSRA as No. 48,343.]]></description>
      <pubDate>Wed, 19 Jul 1978 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/73837</guid>
    </item>
    <item>
      <title>BASIC NAVAL CONSIDERATIONS FOR CONCRETE SHIPS AND VESSELS</title>
      <link>https://trid.trb.org/View/48281</link>
      <description><![CDATA[Concrete as a material to construct ship-like forms offers an interesting alternative to the more usual material, steel.  The disadvantages of increased weight and of increased friction drag appear to be the most significant penalties.  The advantage of having a moldable material permits the use of hull forms now uncommon and should reduce the cost of producing appendages such as bulbs.  A twin-sked, tunnel stern configuration of better propeller performance and more easily adaptable to concrete construction, is introduced.]]></description>
      <pubDate>Wed, 11 May 1977 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/48281</guid>
    </item>
    <item>
      <title>AN INTRODUCTION TO THE CUTAWAY HULL</title>
      <link>https://trid.trb.org/View/44101</link>
      <description><![CDATA[This paper introduces a revolutionary tanker hull form.  The original incentive of attempting to minimize the loss of economic efficiency with the advent of segregated ballast requirements has prompted the structuring of a principle applicable to non-segregated tankers as well.  Presented are the theory behind the principle, simulated application to a 220,000 DWT tanker, and economic comparison between the Cutaway tanker and a conventional tanker.]]></description>
      <pubDate>Tue, 15 Mar 1977 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/44101</guid>
    </item>
    <item>
      <title>EFFECTS OF BEAM ON THE HYDRODYNAMIC CHARACTERISTICS OF SHIP HULLS</title>
      <link>https://trid.trb.org/View/66750</link>
      <description><![CDATA[Forced oscillation experiments were carried out with a systematic ship model family of which the length-beam ratio ranged from 4 to 20.  The experiments also included a thin plate to simulate the case of an infinite length-beam ratio. Vertical and horizontal harmonic motions in calm water were considered and the corresponding hydrodynamic coefficients were determined.  Moreover the vertical motions and added resistance in waves were measured.  The results are presented in graphical form and are compared with some existing calculation methods.]]></description>
      <pubDate>Tue, 15 Mar 1977 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/66750</guid>
    </item>
    <item>
      <title>DIGITAL SIMULATION ANALYSIS OF MANEUVERING PERFORMANCE</title>
      <link>https://trid.trb.org/View/66753</link>
      <description><![CDATA[This paper presents results obtained in a series of digital simulations in the area of standard maneuver motion predictions, hull form design, control systems design, and maneuvering control in narrow channels.  Hydrodynamic data obtained in captive model tests were used to achieve a realistic modeling of ship dynamic systems.  Encouraging correlations are shown for the case of a typical large tanker between digital simulations and available full-scale trial data obtained in various maneuvers, including highly nonlinear ones such as enter-a-turn with a 40-degree rudder angle and emergency stopping from the design speed. Effects of inherent dynamic instability due to wide full-form configurations are examined in digital simulations as well as eigenvalue analysis.  Results indicate that a ship with a large degree of inherent instability requires a relatively high sensitivity feedback in yaw-rate to achieve directional stability.  Evaluation of maneuvering performance at the design stage is recommended particularly for full-form configurations.]]></description>
      <pubDate>Tue, 15 Mar 1977 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/66753</guid>
    </item>
    <item>
      <title>INTERACTIVE PARAMETER ANALYSIS PROGRAM (IPAP)- USER'S MANUAL</title>
      <link>https://trid.trb.org/View/63954</link>
      <description><![CDATA[This manual describes the operation of an interactive graphics computer program which assists ship designers in the identification of correlations and trends in ship design parameters.  The program displays points representing parameter values of a selected group of ships, and enables the engineer to fit to these points and record analytic curves.]]></description>
      <pubDate>Wed, 16 Feb 1977 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/63954</guid>
    </item>
    <item>
      <title>LX SYNTHESIS MODEL HULLFORM DEVELOPMENT-NORMALIZED BONJEAN CURVES</title>
      <link>https://trid.trb.org/View/63955</link>
      <description><![CDATA[The sectional area data of the related hullforms were captured in digital form and processed via an active graphics computer program which displayed the sectional area data and facilitated fitting of least-square polynomial bonjean curves for each offset station.  The sectional area data and the derived bonjean curves were transformed to originate at the load waterline and were normalized on the design draft, to promote their use in assessing time and ballast requirements in a synthesis model computer program for wet well-type landing ships.]]></description>
      <pubDate>Wed, 16 Feb 1977 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/63955</guid>
    </item>
    <item>
      <title>SOME NUMERICAL RESULTS ON WAVE RESISTANCE OF A POINT DIPOLE</title>
      <link>https://trid.trb.org/View/66358</link>
      <description><![CDATA[The distribtution of singularities (that is, source, sink, and dipole) representing a ship's hull has played an important role in the study of wave resistance in naval hydrodynamics.  Based on the theoretical wave resistance formula from linearized free-surface theory, six different wave resistance expressions in terms of three wave components along a longitudinal cut parallel to the ship's course are presented.  To demonstrate the numerical accuracy of these wave resistance expressions, the analysis has been applied to the theoretical wave profiles generated by a submerged point dipole, and the results are compared with the known theoretical value.]]></description>
      <pubDate>Wed, 16 Feb 1977 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/66358</guid>
    </item>
    <item>
      <title>INTERNATIONAL SEMINAR ON WAVE RESISTANCE</title>
      <link>https://trid.trb.org/View/61310</link>
      <description><![CDATA[The International Seminar on Wave Resistance has been planned in the hope that it may play two-fold  functions - Michigan 1963 Seminar and JTTC 1965 Symposium - as far as possible, by overcoming the handicap peculiar to Japan, language and distance.  Two meetings of different objects were held both in Tokyo and Osaka.  The texts and discussions together with the Introductory Lecture and the Introductory Remarks for the former meeting (in  Tokyo) are collected in the Part 1, while the Part 2 is devoted for the latter meeting (in Osaka)]]></description>
      <pubDate>Wed, 17 Nov 1976 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/61310</guid>
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