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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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    <item>
      <title>Diesel engine noise conference</title>
      <link>https://trid.trb.org/View/1153479</link>
      <description><![CDATA[]]></description>
      <pubDate>Wed, 22 Aug 2012 19:12:04 GMT</pubDate>
      <guid>https://trid.trb.org/View/1153479</guid>
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      <title>STANDARDISATION OF DIESEL LOCOMOTIVES. NOISE ABATEMENT ON DIESEL LOCOMOTIVES. REPORT ON THE TESTS CARRIED OUT AT CROY-ROMAINMOTIER FROM 5TH TO 10TH SEPTEMBER 1960</title>
      <link>https://trid.trb.org/View/15235</link>
      <description><![CDATA[The tests were carried out September 10-15, 1960 on the Swiss Federal Railways network at Croy-Romainmotier between Vallorbe and Lausanne.  The report of these tests form the subject of this document and the conclusions which it is now possible to draw are given in a summary.]]></description>
      <pubDate>Fri, 08 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/15235</guid>
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    <item>
      <title>STANDARDISATION OF DIESEL LOCOMOTIVES. NOISE ABATEMENT ON DIESEL LOCOMOTIVES SUPPLEMENT TO DOCUMENT NO. 8 (APPENDICES IV AND V)</title>
      <link>https://trid.trb.org/View/15236</link>
      <description><![CDATA[In August 1960 the Control Committee approved a programme of tests drawn up by the Specialists Committee B 13 with a view to the carrying out of systematic noise level measures on Diesel locomotives, selected according to an agreed type scheme.  The tests were carried out from the 5th to the 10th September 1960 on a line of the CFF at Croy-Romainmotier, between Vallorbe and Lausanne.  The various noises produced by the Diesel locomotives could be compared under similar conditions on the same section of track, both by means of subjective measurements and by means of measurements.  Furthermore, the tests enabled a comparison to be made between the measuring procedures employed by the various Administrations.  An account of these noise level tests carried out at Croy-Romainmotier is given in the ORE report B 13/RP 8.  The present report B 13/RP 9 contains additional statistical analyses on the measuring results obtained in the course of the noise level tests.  For a better understanding of the report, the various test series have been reproduced in a clear way in the next chapter.   The acoustical bases, together with the definitions of the various measuring units, as well as more precise data concerning the 10 Diesel locomotives examined, are described in detail in Report B 13/RP 8.]]></description>
      <pubDate>Fri, 08 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/15236</guid>
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      <title>NOISE ABATEMENT. MEASURING PRINCIPLES</title>
      <link>https://trid.trb.org/View/14990</link>
      <description><![CDATA[The object of the present note is to inform ORE of the arrangements already made by the Sub-Committee "Measurements."  A bridge selected by the DB (at Rosenheim) for conducting various tests concerning rail laying systems (Sub-Committee E 82b), for which arrangements concerning the installations on the sites have been made, has been studied.  The present note supplies: a survey of some general characteristics concerning measurements of sound levels, the directives adopted concerning: the measuring chain and the measuring units to be used for the tests, and the evaluation of the tests and the presentation of the results and also the measuring arrangements for the Sub-Committees "Diesel" and "Bridges".]]></description>
      <pubDate>Fri, 08 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/14990</guid>
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    <item>
      <title>INFLUENCE OF ENGINE STRUCTURAL VIBRATIONS ON DIESEL ENGINE NOISE LEVEL</title>
      <link>https://trid.trb.org/View/138480</link>
      <description><![CDATA[A description is presented of the rig and measuring method which enable a follow up analysis of noise generation process by means of combustion simulation.  The results obtained may play important role in noise abatement problems solutions.  A study is made with different bearings by measuring or generated noise levels.]]></description>
      <pubDate>Fri, 29 Jan 1982 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/138480</guid>
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    <item>
      <title>OPERATIONAL EXPERIENCE WITH MEDIUM SPEED DIESEL ENGINES</title>
      <link>https://trid.trb.org/View/138485</link>
      <description><![CDATA[The philosophy leading to the adoption of geared medium speed diesel engines in a cargo liner and a products carrier is described and results obtained in service are presented. Details of noise trial results, piston, piston ring and liner wear, usage rates of water cooled and rotocap exhaust valves are presented.  Service experience with critical items of the installation including reduction gearbox and exhaust gas blowers is also included.]]></description>
      <pubDate>Fri, 29 Jan 1982 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/138485</guid>
    </item>
    <item>
      <title>TECHNOLOGY TRANSFER--TRANSPORTATION</title>
      <link>https://trid.trb.org/View/50484</link>
      <description><![CDATA[The Technology Utilization Program of the National Aeronautics and Space Administration aims to transfer space-related technology to the solution of nonspace problems.  One of the areas is transportation.  Members of SRI Technology Applications Team routinely work with a user community comprising, among others, DOT and the railroads. Rail industry needs addressed by the team included: the need for early warning of impending roller bearing failure; detection of residual stresses in wheels and rails; dynamic relationships between cars and track; quieting of diesel locomotive exhaust; fire-resistant construction materials and improved management techniques (for the rapid-transit industry).]]></description>
      <pubDate>Mon, 31 Aug 1981 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/50484</guid>
    </item>
    <item>
      <title>ANALYSIS OF PISTON SLAP-INDUCED NOISE AND ASSESSMENT OF SOME METHODS OF CONTROL IN DIESEL ENGINES</title>
      <link>https://trid.trb.org/View/158280</link>
      <description><![CDATA[In diesel engines combustion-optimized for fuel consumption or emissions, mechanically induced noise tends to control the overall engine noise level, with that due to piston slap being predominant.  Previous studies, mainly experimental, have helped to clarify the mechanism of the piston slap phenomenon and have suggested methods of control.  This paper presents the latest results of a theoretical analysis of the piston slap dynamics which yields predictions of some optimum piston design features for low piston slap-induced noise related to the estimated mechanical efficiency of the engine.]]></description>
      <pubDate>Wed, 18 Feb 1981 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/158280</guid>
    </item>
    <item>
      <title>MEASUREMENTS AND DIAGNOSIS OF DIESEL ELECTRIC LOCOMOTIVE NOISE</title>
      <link>https://trid.trb.org/View/161024</link>
      <description><![CDATA[The article describes the measurement methods of noise generated by an SD40-2 diesel electric locomotive under a number of operating conditions, in idle and eight throttle settings.]]></description>
      <pubDate>Wed, 18 Feb 1981 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/161024</guid>
    </item>
    <item>
      <title>SURFACE ACOUSTICAL INTENSITY MEASUREMENTS ON A DIESEL ENGINE</title>
      <link>https://trid.trb.org/View/155635</link>
      <description><![CDATA[The use of surface intensity measurements as an alternative to the conventional selective wrapping technique of noise source identification and ranking on diesel engines was investigated. A six cylinder, in line turbocharged, 350 horsepower diesel engine was used. Sound power was measured under anechoic conditions for eight separate parts of the engine at steady state operating conditions using the conventional technique. Sound power measurements were repeated on five separate parts of the engine using the surface intensity at the same steady state operating conditions. The results were compared by plotting sound power level against frequency and noise source rankings for the two methods.]]></description>
      <pubDate>Tue, 16 Sep 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/155635</guid>
    </item>
    <item>
      <title>BENEFITS OF DIESEL ENGINE NOISE RESEARCH</title>
      <link>https://trid.trb.org/View/92240</link>
      <description><![CDATA[The British government, in cooperation with the Motor Industry Research Association, the Institute of Sound and Vibration Research, the Transport and Road Research Laboratory and manufacturing industry, mounted a long term project to develop and build prototypes of two quiet, heavy vehicles- one with a 200bhp engine and the other with a 350bhp engine.  The research target for the vehicles was a noise level at least 10dBA lower than the appropriate value required by the present Construction and Use Regulations. That is, they are not to exceed 82dBA in standard test conditions.  This article describes the methods and equipment used by the Perkins Engines Group in their intensive research program to investigate the diesel engine noise problem.  In order to assess new ideas for engine noise reduction and help test the predictive techniques using the finite element method, a research engine was built.  It was based on the internal parts of a current production four cylinder 4.236 engine.  Test on the first phase of the research engine project revealed that a reduction of nearly 11dBA has been achieved on cylinder block noise when compared with the production engine cylinder block.]]></description>
      <pubDate>Tue, 28 Aug 1979 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/92240</guid>
    </item>
    <item>
      <title>REDUCING NOISE RADIATED BY DIESEL ENGINES -- 1, 2</title>
      <link>https://trid.trb.org/View/92155</link>
      <description><![CDATA[Part 1 of this 2-part article discusses 4 basic approaches to controlling noise radiated by engine surfaces: (1) Control noise generation from sources within the engine and its accessories; (2) Reduce transmission of vibration from sources to radiating surfaces; (3) Control vibration of external surfaces of the engine; (4) Enclose the engine. Ways of implementing each approach are outlined.  The relative importance of combustion noise and mechanical noise is discussed, and a method of diagnosing the contribution to the overall engine noise from each surface area is covered. Part 2 describes in some detail the methods of diagnosing the vibrations from crankcase, cylinder block, valve gear covers and sump, and suggests ways of damping them to achieve an overall reduction of 5dBA or more.]]></description>
      <pubDate>Tue, 28 Aug 1979 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/92155</guid>
    </item>
    <item>
      <title>RATE OF HEAT RELEASE IN DIESEL ENGINES</title>
      <link>https://trid.trb.org/View/57950</link>
      <description><![CDATA[In this report, the concept of heat release in diesel engines is compared with reaction rates in petrol engines as a means of describing combustion. The intimate relationships between heat release, cylinder pressure development and cylinder pressure spectra are illustrated. A combustion model for the prediction of heat release and combustion noise, based primarily on physical aspects of diesel combustion system design, is put forward. This model indicates that fuel droplet size and the temperature of the cylinder contents are of prime importance in determining cylinder pressure noise excitation. The relationship between cylinder pressure spectra and combustion induced engine noise is described and used to show how the combustion model can predict combustion induced noise at the design stage. A simplified procedure based on the results of this modelling is put forward to predict combustion induced noise as a function of rate of pressure rise, speed and bore and applied to a Standard Engine Structure. As an approximation the prediction formulae are also given in terms of initial peak rate of heat release, engine speed and bore. Mechanical noise aspects of diesel engines, although important, are excluded from the work. (Portions of this document are not fully legible)]]></description>
      <pubDate>Tue, 14 Mar 1978 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/57950</guid>
    </item>
    <item>
      <title>STRUCTURAL VIBRATION NOISE ABATEMENT OF A LARGE DIESEL ENGINE</title>
      <link>https://trid.trb.org/View/56696</link>
      <description><![CDATA[This report presents a vibration-noise investigation and a redesign of the top deck and the hand hole covers of GM 645E series railroad diesel engine for reduction of vibration and radiated noise. This was achieved by incorporating in the redesigned components, isolation, stiffening and damping. For damping, the solid friction, constrained layer and viscous air damping approaches were utilized. Experimental results on vibration and noise of the original and redesigned covers were obtained. It was found that a composite design with channel stiffened constrained layer outer panel and a fiberglass filled inner cavity offered the best solution. On-engine tests at full load showed acceleration reductions of 2-40 dB for the redesigned composite top deck cover and 2-16 dB for the redesigned constrained layer hand hole cover. The composite design is recommended for both covers.]]></description>
      <pubDate>Wed, 09 Nov 1977 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/56696</guid>
    </item>
    <item>
      <title>COMBUSTION RANDOMNESS AND DIESEL ENGINE NOISE: THEORY AND INITIAL EXPERIMENTS</title>
      <link>https://trid.trb.org/View/58953</link>
      <description><![CDATA[Theoretical reasoning and preliminary experimental results show that the cycle variations in the turbulent combustion process in a Diesel engine are responsible for a substantial amount of noise radiated from the engine.  A two-time variable procedure is used to construct a theory of the three dimensional, unsteady Diesel engine combustion chamber pressure development.  This theory is used to extract the spectral behavior of the chamber pressure when the heat release rate contains both periodic and random components. It is then theoretically shown that the randomness can be expected to dominate the periodic part of the pressure-time trace above some lower frequency bound of the order of 1000 Hz.]]></description>
      <pubDate>Thu, 13 Oct 1977 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/58953</guid>
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