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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>
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    <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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    <item>
      <title>A RESEARCH ON THE MECHANISM OF WATER-LUBRICATED RUBBER STERN-TUBE BEARING</title>
      <link>https://trid.trb.org/View/444048</link>
      <description><![CDATA[This paper analyses the mechanism of adhesive friction and lag effect of elastomer on stern-tube bearing.  Calculation methods for finite element elastic deformation and dynamic hydroelastic lubrication are discussed to explain the bearing mechanism.  Results of model tests on the marine stern-tube bearing show favourable prospects even in river water carrying suspended sand and silt.]]></description>
      <pubDate>Mon, 14 Aug 1995 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/444048</guid>
    </item>
    <item>
      <title>STRUCTURAL IMPROVEMENT AND EXPERIMENTAL RESEARCH OF STERN-TUBE BEARING</title>
      <link>https://trid.trb.org/View/445844</link>
      <description><![CDATA[The reliability and service life of a stern tube bearings are vital in ensuring safe operation and economic benefits.  The main problems of traditional stern-tube bearing design are discusses, based on an analysis of the lubricating properties of a stern-tube bearing for a 27 000 DWT bulk carrier.  A new type of bearing design is proposed and its satisfactory lubricating property is verified by experimental results.]]></description>
      <pubDate>Mon, 14 Aug 1995 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/445844</guid>
    </item>
    <item>
      <title>STIFFNESS, FRICTION, AND WEAR CHARACTERISTICS OF ALTERNATIVE STERN TUBE BEARING MATERIALS AND DESIGNS FOR U.S. COAST GUARD POLAR CLASS ICEBREAKERS</title>
      <link>https://trid.trb.org/View/387695</link>
      <description><![CDATA[A two-part study has been established to investigate the vibration and water-lubricated stern tube bearing wear problems encountered on the U.S.  Coast Guard Polar Class icebreakers.  The first part evaluates fourteen alternative bearing materials and designs for radial stiffness, dynamic and breakaway friction, and wear characteristics.  A lateral vibration analysis and alignment study will be conducted in the second part by modelling the bearing, shafting, and bearing support structure.  Stiffness and friction tests have been performed on a 6 3/4 inch diameter water-lubricated journal bearing.  Wear data were compared for each material against a 70-30 copper-nickel shaft under abrasive conditions.  The stiffness of the laminated phenolic bearing was as expected, much stiffer than the rubber-surfaced stave bearing.  Dynamic friction for each was compared.  The wear rate of the phenolic material was the highest of all fourteen materials tested.]]></description>
      <pubDate>Thu, 21 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/387695</guid>
    </item>
    <item>
      <title>WATER LUBRICATED STERN TUBE BEARINGS, RECENT DEVELOPMENTS</title>
      <link>https://trid.trb.org/View/387822</link>
      <description><![CDATA[A summation of the major research activities at Thomson-Gordon in the past four years is presented.  These include the following: an experimental study of the friction and wear properties of several commercially available and prototype propeller shaft bearings used in an open-system and lubricated with water; and, a theoretical and experimental study of a closed lubrication system employing a non- polluting water soluble lubricant and a bearing able to operate with either the lubricant or plain water.  The testing was performed in a specially designed test rig equipped with a 101.6mm (4") shaft and capable of measuring friction and applied load over speeds from .5 RPM to 1100 RPM.  The test bearings were "lubricated" with either clean, fresh water, abrasive laden water, oil, or a water soluble lubricant, depending on the nature of the test. The results showed significant differences in abrasive wear rates, with soft bearings tending to last longest.  Friction results showed wide variance, depending on the lubricant used and running conditions.  Shorter bearings tended to have lower friction than long ones.  Bearings without grooves in the loaded areas showed definite improvement in friction characteristics.]]></description>
      <pubDate>Thu, 21 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/387822</guid>
    </item>
    <item>
      <title>DEVELOPMENTS IN PROPELLER SHAFT BEARINGS FOR OPEN AND CLOSED SYSTEMS</title>
      <link>https://trid.trb.org/View/387878</link>
      <description><![CDATA[A summation of the major research activities at Thomson-Gordon in the past 4 years is presented.  These include the following: an experimental study of the friction and wear properties of several commercially available and prototype propeller shaft bearings used in an open-system and lubricated with water; and a theoretical and experimental study of a closed lubrication system employing a non- polluting water soluble lubricant and a bearing able to operate with either the lubricant or plain water.  The testing was performed in a specially designed test rig equipped with a 101.6mm (4 inch) shaft and capable of measuring friction and applied load over speeds from .5 RPM to 1100 RPM.  The test bearings were "lubricated" with either clean fresh water, abrasive laden water, oil, or a water soluble lubricant depending on the nature of the test.  The results showed significant differences in abrasive wear rates with soft bearings tending to last longest.  Friction results showed wide variance depending on the lubricant used and running conditions.  Shorter bearings tended to have lower friction than long ones.  Bearing without grooves in the loaded areas showed definite improvement in friction characteristics.]]></description>
      <pubDate>Thu, 21 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/387878</guid>
    </item>
    <item>
      <title>STUDY OF THE PERFORMANCE OF OPEN AND CLOSED SYSTEM STERN TUBE BEARINGS PRODUCED BY THOMSON GORDON</title>
      <link>https://trid.trb.org/View/391097</link>
      <description><![CDATA[An experimental study of the friction and wear performance of several commercially available and prototype marine bearings was performed on a specially built test rig. Several successful results were obtained.  The abrasive water tests showed marked improvements were attainable over conventional bearings.  The friction tests with fresh water showed very similar performance for all bearings tested with a few notable exceptions.  A change in L/D ratio from 4 to 2 showed improvements in friction performance in water as did the elimination of axial grooves from the loaded sections of bearings. Finally, the addition of the water soluble lubricant caused a drastic reduction in friction with the promise of long life and fail-safe operation.]]></description>
      <pubDate>Thu, 21 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/391097</guid>
    </item>
    <item>
      <title>REDUCING THE DYNAMIC LOADS ON STERN BEARINGS</title>
      <link>https://trid.trb.org/View/391303</link>
      <description><![CDATA[ not available]]></description>
      <pubDate>Thu, 21 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/391303</guid>
    </item>
    <item>
      <title>PRECISE STERNTUBE AND STRUT BEARING ALIGNMENT WITHOUT BORING</title>
      <link>https://trid.trb.org/View/391634</link>
      <description><![CDATA[Accurate sterntube and strut bearing alignment is essential for reliable propulsion. Installation by traditional boring is slow, not always accurate, and difficult to correct if misaligned. An alternative method using epoxy resin that eliminates in-situ boring has been in use for over 12 years and used on hundreds of bearings. Most were under 250mm (10 in) bore, the largest 560mm (22in), but the method has no practical limits and is now being incorporated into several new large ship designs.]]></description>
      <pubDate>Thu, 21 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/391634</guid>
    </item>
    <item>
      <title>MACHINERY HULL INTERACTION VIBRATIONS, 2D</title>
      <link>https://trid.trb.org/View/392204</link>
      <description><![CDATA[This document consists of a collection of papers prepared by members of the Bureau Veritas Senior Technical Staff. Titles of the papers are as follows: Studies Leading to Vibration and Noise Free Ships; Vibrations of Superstructures of Ships--their Causes--their Remedies; Integrated Treatment of Static and Vibratory Behaviour of Twin-Screw 553,000 dwt Tankers; Interaction and Compatibility Between Machinery and Hull from a Static and Vibratory Point of View; Modern Treatment of Stern Gear Behaviour in View of Difficulties Encountered in the Past; Damping in Ships' Vibrations; Analytical and Experimental Investigation into a New Two-Stroke Engine Frame Structure; Actual Tail Shaft Behaviour on Oil Film Taking Account of Propeller Forces and Moments; Some Studies and Researches Related to the Hydro-Elasticity of Steel-Work; European- Built Sea Barge Carriers--their Design, Machinery/Hull Interaction and Investigations into Vibratory Behaviour.]]></description>
      <pubDate>Thu, 21 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/392204</guid>
    </item>
    <item>
      <title>MEASUREMENT OF ICE/PROPELLER INTERACTION PARAMETERS--MV ROBERT LEMEUR</title>
      <link>https://trid.trb.org/View/394309</link>
      <description><![CDATA[This report documents the preliminary analysis of the data collected on board the M.V. ROBERT LEMEUR during the 1984 operating season, including five days of dedicated tests in June 1984. An analysis of the propulsion train components is provided. Propeller/ice impact forces are analyzed and the response of the shafting system is determined. A model of blade-ice interaction is proposed based on the data analysis. A model of the yoke-pin and shaft response to the ice torque and thrust is also developed. Software used during data analysis is fully documented.  Conclusions pertinent to regulatory purposes are derived.]]></description>
      <pubDate>Thu, 21 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/394309</guid>
    </item>
    <item>
      <title>THOR-LUBE STERNTUBE SYSTEMS</title>
      <link>https://trid.trb.org/View/394938</link>
      <description><![CDATA[A theoretical and experimental study of the feasibility and development of a water soluble lubricated, elastomer-based marine bearing was performed. The primary aim was to provide an alternative to the standard water (open) or oil (closed) lubricated marine bearings for propeller shafts. A water soluble lubricant was discovered that was found to be biodegradable and with low toxicity, as well as providing excellent lubrication properties when used in conjunction with Thordon XL bearing material. A dramatic reduction in low-speed friction over standard water or oil lubricated bearings was recorded, with the high speed friction being on the same level as white metal/oil bearings.]]></description>
      <pubDate>Thu, 21 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/394938</guid>
    </item>
    <item>
      <title>FINITE-ELEMENT ANALYSIS OF ELASTOHYDRODYNAMIC STERN BEARINGS</title>
      <link>https://trid.trb.org/View/395191</link>
      <description><![CDATA[A finite-element analysis is performed for a marine shafting/bearing system utilizing a hydrodynamic, oil-lubricated stern bearing. The stern bearing analysis consists of three-dimensional finite-element analyses of the shafting and the elastic bearing liner, a two- dimensional finite-element analysis of the oil film hydrodynamics, and iterative techniques to establish the equilibrium position between the shaft, the oil film and the bearing material. The results of this analysis are in good agreement with a wide range of experimental data from a stern bearing simulation apparatus.]]></description>
      <pubDate>Thu, 21 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/395191</guid>
    </item>
    <item>
      <title>TIME-VARYING LATERAL MOTION OF A MARINE SHAFTING SYSTEM DUE TO PROPELLER EXCITATION</title>
      <link>https://trid.trb.org/View/396539</link>
      <description><![CDATA[The time-varying motion of a shafting system within a stern bearing due to the unsteady forces and moments acting on the propeller is obtained using coupled finite element analyses. At each simulation time step, mathematical programming is used to achieve consistent solutions in the separate analyses for the shafting system and the oil film hydrodynamics.  The stern bearing support flexibility is incorporated. A modified form of Newmark's method is used to step ahead in time. Improved oil film finite element modeling is incorporated to provide the computational improvements necessary for a practical solution on a personal workstation. Analysis of an existing design that operates near a lateral critical shows significant motion within the bearing, reaching about 38% of the bearing clearance. A periodic solution is achieved within about two shaft revolutions.]]></description>
      <pubDate>Thu, 21 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/396539</guid>
    </item>
    <item>
      <title>THE BEARING CAPACITY OF POLYAMIDE BEARINGS</title>
      <link>https://trid.trb.org/View/397311</link>
      <description><![CDATA[The durability of polyamide stern bearings was evaluated by studying their bearing capacity under conditions of limited water lubrication.]]></description>
      <pubDate>Thu, 21 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/397311</guid>
    </item>
    <item>
      <title>METAL STERN BEARINGS</title>
      <link>https://trid.trb.org/View/397552</link>
      <description><![CDATA[Babbitt metal stern bearings have become quite common on seagoing ships.  Standards approved by the Soviet Registry and the Russian River Registry for the design of these bearings are discussed.]]></description>
      <pubDate>Thu, 21 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/397552</guid>
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