ASTM_E_1082_-_90_2017.pdf

Designation:E108290(Reapproved 2017)Standard Test Method forMeasurement of Vehicular Response to Traveled SurfaceRoughness1This standard is issued under the fixed designation E1082;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers the determination of vehicularresponse to traveled surface roughness.1.2 This test method utilizes an apparatus that measures therelative motion of a sprung mass system in response to traveledsurface roughness where the mass is supported by automotive-type suspension and tires.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.Specific precau-tionary statements are given in Section 6.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2E177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE178 Practice for Dealing With Outlying ObservationsE867 Terminology Relating to Vehicle-Pavement SystemsE1136 Specification for P195/75R14 Radial Standard Refer-ence Test Tire3.Summary of Test Method3.1 Vehicular response to traveled surface roughness iscalculated from an accumulated displacement measurementdivided by the test section length.A vehicle is brought to thedesired test speed and lateral position in the lane to be tested.The test apparatus is placed in operation and a constant speedis maintained throughout the test.Pertinent information affect-ing test results must be noted.4.Significance and Use4.1 This test method provides a means of evaluating trav-eled surface roughness.The measured values represent vehicu-lar response to traveled surface roughness obtained with theequipment and procedures stated herein and do not necessarilyagree or correlate directly with those obtained by othermethods.35.Apparatus5.1 Test Apparatus,consisting of an axle to frame thedisplacement measuring sensor,a displacement accumulator,adistance measuring system,and a recording system mounted ina vehicle that is either a suitable passenger automobile withfour wheels or a suitable single-axle,two-wheel trailer towedby a vehicle.5.2 Test AutomobileThe vehicle used to house the dis-placement measurement sensor.It shall be equipped as follows:5.2.1 Engine in front,5.2.2 Rigid rear axle,5.2.3 Rear springs(coil,single leaf,gas),5.2.4 Rear sway bar,5.2.5 Heavy duty shock absorbers,5.2.6 Tires dynamically balanced(GM-TPC4or Specifica-tion E1136),5.2.7 Cruise control,5and5.2.8 Air conditioning.55.3 Test TrailerA two-wheel trailer shall be specificallydesigned and equipped to house the displacement measurementsensor,meeting the following requirements:1This test method is under the jurisdiction of ASTM Committee E17 on Vehicle-Pavement Systems and is the direct responsibility of Subcommittee E17.31 onMethods for Measuring Profile and Roughness.Current edition approved June 1,2017.Published June 2017.Originallyapproved in 1985.Last previous edition approved in 2012 as E1082 90(2012).DOI:10.1520/E1082-90R17.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Gillespie,T.D.,Sayers,M.W.,and Segel,L.,“Calibration of Response-TypeRoad Roughness Measuring System,”National Cooperative Highway ResearchProgram Report 228,December 1980.4General Motors,“Tire Performance Criteria,Procedures and Specifications,”Engineering Publication A-4082,General Motors Corp.,Milford,MI,1982.5These items are optional but are listed since they can substantially affect theease with which the test is run.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 5.3.1 120 6 1 in.(3048 6 25 mm)from the center of thehitch to the center of the axle,5.3.2 65 6 5 in.(1651 6 127 mm)from the center of thetire to the center of the tire,5.3.3 Coil-spring shock absorber suspension system,5.3.4 Sway bar