SAE J1805-1993 SOUND POWER LEVEL MEASUREMENTS OF EARTHMOVING MACHINERY.STATIC AND IN-PLACE DYNAMIC METHODS.pdf
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1、SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefr
2、om, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. QUESTIONS REGARDING THIS DOCUMENT: (724) 772-8512 FAX: (724) 776-0243 TO PLACE A DOCU
3、MENT ORDER; (724) 776-4970 FAX: (724) 776-0790 SAE WEB ADDRESS http:/www.sae.org Copyright 1993 Society of Automotive Engineers, Inc. All rights reserved.Printed in U.S.A. SURFACE VEHICLE 400 Commonwealth Drive, Warrendale, PA 15096-0001 RECOMMENDED PRACTICE Submitted for recognition as an American
4、National Standard J1805 REV. APR93 Issued1987-04 Revised1993-04 Superseding J1805 APR87 (R) SOUND POWER LEVEL MEASUREMENTS OF EARTHMOVING MACHINERY STATIC AND IN-PLACE DYNAMIC METHODS 1.ScopeThis SAE Recommended Practice is used to determine the exterior A-weighted equivalent sound power level of st
5、atic and in-place dynamic machines (dozer, loader, excavator, and backhoe) similar to the sound power obtained in SAE J2102/ISO 6393 static and SAE J2104/ISO 6395 dynamic sound power test procedures. The recommended test procedures include conventional integrating sound pressure level methods or the
6、 sound intensity method using paired microphones. The sound intensity methodology provides a practical indoor alternative and permits measurement in the factory environment. The procedures in this document assume that the dominant sources are not highly sensitive to load (i.e., cooling fan, engine,
7、track system). This test can be used as a substitute for the SAE J2102/ISO 6393 static and SAE J2104/ISO 6395 dynamic sound power tests for many machine types. Since the SAE J1372 test remains valid as a static test, it is not necessary to run SAE J1372 in addition to SAE J1805. The requirements for
8、 the machine setup and operation, and the microphone array and hemispherical measurement surface are given in this document. This document shall be used in conjunction with instrumentation manufacturers recommendations pending finalization of ANSI documents on the subject of sound intensity procedur
9、es. The accompanying sound intensity procedure clarification is provided pending more widespread understanding of sound intensity. 2.References 2.1Applicable PublicationsThe following publications form a part of this specification to the extent specified herein. The latest issue of SAE publications
10、shall apply. 2.1.1SAE PUBLICATIONSAvailable from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001. SAE J184 AUG87Qualifying a Sound Data Acquisition System SAE J1057 SEP88Identification Terminology of Earthmoving Machines SAE J1349 JAN90Engine Power Test CodeSpark Ignition and Compression Igni
11、tionNet Power Rating SAE J1372 JUL88Sound PowerDeterminationEarthmoving MachineryStatic Condition SAE J2101/ISO 4872-1978AcousticsMeasurement of Airborne Noise Emitted by Construction Equipment Intended for Outdoor UseMethod for Determining Compliance with Noise Limits SAE J2102/ISO 6393-1985Acousti
12、csMeasurement of Airborne Noise Emitted by Earthmoving MachineryMethod for Determining Compliance with Limits for Exterior Test ConditionStationary Test Condition SAE J1805 Revised APR93 -2- SAE J2104/ISO 6395-1989AcousticsMeasurement of Airborne Noise Emitted by Earthmoving MachineryMethod for Dete
13、rmining Compliance with Limits for Exterior NoiseSimulated Work Cycle Test Conditions SAE Technical Paper 850991In-Place Dynamic Sound Power Test Method 2.1.2ANSI AND ISO PUBLICATIONSAvailable from ANSI, 11 West 42nd Street, New York, NY 10036-8002. ANSI S1.1-1960 (R1976)Acoustical Terminology ANSI
14、S1.13-1971 (R1976)Methods for the Measurement of Sound Pressure Levels ANSI S1.23-1976Method for the Designation of Sound Power Emitted by Machinery and Equipment ANSI S1.4-1983Specification for Sound Level Meters ISO 1585-1974Road VehiclesEngine Test CodeNet Power ISO 6165-1978Earth-Moving Machiner
15、yBasic TypesVocabulary 2.1.3OTHER PUBLICATIONS IEC Publication 651-1979Type 1, Precision Sound Level Meters IEC Publication 804-1985Integral and Averaging Sound Level Meter B any other method of controlling track tension while maintaining the same sound characteristics is allowed. TABLE 4MICROPHONE
16、LOCATION SEGMENT AREA FACTORS Segments per Layer Elevation Vertical AngleCounterclockwise Angle Relative to Front Segment Area Factor Multiply by (r) Squared Bottom - 1275 degreeStart 0, inc. 30 degree0.270 Middle - 845 degreeStart 0. inc. 45 degree0.248 Upper - 415 degreeStart 45, inc. 90 degree0.2
17、63 SAE J1805 Revised APR93 -7- The hardwood skid may be permanent or installed on a plate for temporary use. Proper care in making the plate and shimming it on the reflecting plane will reduce plate noise contribution to insignificance. 4.4.3Wheeled and tracked excavator machines shall be in contact
18、 with the reflecting plane or protecting rubber belting or any other nonabsorptive material. 4.5Machine OperationThe machine shall be operated at a stabilized running temperature for the prevailing ambient condition. All engines on a multiengined machine shall be operated concurrently. Sound data on
19、 the machine shall be measured under the two operating conditions as follows: 4.5.1STATIC CONDITIONThe machine will be operated at the manufacturers specified rated engine speed under no-load condition with the transmission in neutral. 4.5.2IN-PLACE DYNAMIC CONDITIONMachine operations are described
20、in Appendices A through D. 4.6Climatic ConditionsAmbient wind and temperature shall be measured at a height of 2 m above the ground and recorded. Measurements shall not be conducted outdoors when precipitation is falling or when the test surface is covered with snow or temperature is below 10 C or a
21、bove +50 C or if the wind velocity exceeds 8 m/s. 4.7Measurements 4.7.1Criteria for A-weighted background noise measured at the microphone positions shall be as follows: 4.7.1.1For sound pressure level instruments, background noise shall be at least 10 dB below the measured level of the machine unde
22、r test. 4.7.1.2For sound intensity systems, background noise can equal that of the machine as long as no other noise source is within the measurement hemisphere. If background noise within 5 dB of the vector measurement is present, it shall be constant within 2 dB during the measurement and during t
23、he entire data accumulation. 4.7.2INTEGRATION PERIODShall be the duration of one cycle unless the event being simulated is a drive-through or static rated speed test, in which case, a single integration period of 20 to 30 s at each microphone location is recommended. It is recommended that three cor
24、rectly executed cycles be measured at each microphone location. The surface segment measurements will be used to obtain the surface energy average sound pressure level LpAeq. The measurements from each surface segment will be energy-averaged together for comparison. The average of the highest two (w
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