ASA S12 11 PART 2-2013 American National Standard Acoustics C Measurement of airborne noise emitted and structure-borne vibration induced by small air-moving devices C Part 2 Struc.pdf

1、 ANSI/ASA S12.11-2013/Part 2 / ISO 10302-2:2011 AMERICAN NATIONAL STANDARD Acoustics Measurement of airborne noise emitted and structure-borne vibration induced by small air-moving devices Part 2: Structure-borne vibration measurements (a nationally adopted international standard) Accredited Standar

2、ds Committee S12, Noise Standards Secretariat Acoustical Society of America 35 Pinelawn Road, Suite 114 E Melville, NY 11747-3177ANSI/ASAS12.11-2013/Part 2 /ISO 10302-2:2011 The American National Standards Institute, Inc. (ANSI) is the national coordinator of voluntary standards development and the

3、clearinghouse in the U.S.A. for information on national and international standards. The Acoustical Society of America (ASA) is an organization of scientists and engineers formed in 1929 to increase and diffuse the knowledge of acoustics and to promote its practical applications. ANSI/ASA S12.11-201

4、3/Part 2/ ISO 10302-2:2011 (Revision of ANSI/ASA S12.112003/Part 2 (R 2008) AMERICAN NATIONAL STANDARD Acoustics Measurement of airborne noise emitted and structure-borne vibration induced by small air-moving devices Part 2: Structure-borne vibration measurements (a nationally adopted international

5、standard) Secretariat: Acoustical Society of America Approved on December 4, 2013 by: American National Standards Institute, Inc. Abstract ANSI/ASA S12.11-2013/Part 2 / ISO 10302-2:2011 covers vibration levels from small air-moving devices (AMDs) with mounting footprints of less than 0.48 m 0.90 m f

6、or the full-size test plenum defined in ANSI/ASA S12.11/Part 1 / ISO 10302-1 and less than 0.18 m 0.3 m for the half-size plenum. It covers all types of AMDs which can be mounted on, and are self-supported at, the discharge or inlet plane of a test plenum box as specified in ANSI/ASA S12.11-2013/Par

7、t 1 / ISO 10302-1:2011. The procedures defined in this part of this American National Standard specify methods for determining the vibration levels that a small AMD would induce in an average structure used in information technology and telecommunications equipment. The methods specified in this par

8、t of this American National Standard allow the determination of induced vibration levels for the individual AMD that is tested. These data can be used to determine the statistical values of vibration levels for a production series if levels are measured for several units of that series. AMERICAN NAT

9、IONAL STANDARDS ON ACOUSTICS The Acoustical Society of America (ASA) provides the Secretariat for Accredited Standards Committees S1 on Acoustics, S2 on Mechanical Vibration and Shock, S3 on Bioacoustics, S3/SC 1 on Animal Bioacoustics, and S12 on Noise. These committees have wide representation fro

10、m the technical community (manufacturers, consumers, trade associations, organizations with a general interest, and government representatives). The standards are published by the Acoustical Society of America as American National Standards after approval by their respective Standards Committees and

11、 the American National Standards Institute (ANSI). These standards are developed and published as a public service to provide standards useful to the public, industry, and consumers, and to Federal, State, and local governments. Each of the Accredited Standards Committees (operating in accordance wi

12、th procedures approved by ANSI) is responsible for developing, voting upon, and maintaining or revising its own Standards. The ASA Standards Secretariat administers Committee organization and activity and provides liaison between the Accredited Standards Committees and ANSI. After the Standards have

13、 been produced and adopted by the Accredited Standards Committees, and approved as American National Standards by ANSI, the ASA Standards Secretariat arranges for their publication and distribution. An American National Standard implies a consensus of those substantially concerned with its scope and

14、 provisions. Consensus is established when, in the judgment of the ANSI Board of Standards Review, substantial agreement has been reached by directly and materially affected interests. Substantial agreement means much more than a simple majority, but not necessarily unanimity. Consensus requires tha

15、t all views and objections be considered and that a concerted effort be made towards their resolution. The use of an American National Standard is completely voluntary. Their existence does not in any respect preclude anyone, whether he or she has approved the Standards or not, from manufacturing, m

16、arketing, purchasing, or using products, processes, or procedures not conforming to the Standards. NOTICE: This American National Standard may be revised or withdrawn at any time. The procedures of the American National Standards Institute require that action be taken periodically to reaffirm, revis

17、e, or withdraw this Standard. Acoustical Society of America Standards Secretariat 35 Pinelawn Road, Suite 114E Melville, New York 11747-3177 Telephone: 1 (631) 390-0215 Fax: 1 (631) 390-0217 E-mail: asastdsaip.org 2013 by Acoustical Society of America. This standard may not be reproduced in whole or

18、 in part in any form for sale, promotion, or any commercial purpose, or any purpose not falling within the provisions of the U.S. Copyright Act of 1976, without prior written permission of the publisher. For permission, address a request to the Standards Secretariat of the Acoustical Society of Amer

19、ica. These materials are subject to copyright claims of ISO, ANSI, and ASA. No part of this publication may be reproduced in any form, including an electronic retrieval system, without the prior written permission of the Acoustical Society of America (ASA). All requests pertaining to this standard s

20、hould be submitted to the ASA at the address above. 2013 Acoustical Society of America All rights reserved i Contents 1 Scope . 1 2 Normative references . 1 3 Terms and definitions . 2 4 Descriptors. 2 5 Measurement uncertainty . 3 6 Design and performance requirements for test fixture . 3 6.1 Basic

21、 design 3 6.2 Damped panel 4 6.3 Mounting area 4 7 Installation . 5 7.1 Orientation of the AMD 5 7.2 Mounting of the AMD 5 7.3 Damped panel opening 5 8 Operation of AMDs . 5 8.1 Input power 5 8.2 Points of operation 6 9 Instrumentation 6 9.1 Plenum pressure measurements 6 9.2 Accelerometer and accel

22、erometer system 6 9.3 Signal conditioners 7 9.4 Analyzer 7 9.5 Basic calibration . 7 10 Measurement procedure 7 10.1 Preparation . 7 10.2 Operational test for AMD 7 10.3 Operational calibration 8 10.4 Measurement . 8 10.5 Corrections for background acceleration levels . 9 10.6 Accelerometer mounting

23、 10 10.7 Accelerometer cable . 11 10.8 Accelerometer locations . 11 10.9 Data acquisition time 11 11 Test report . 12 11.1 Information to be recorded . 12 11.2 Information to be reported 13 Annex A (informative) Suggested data format for presentation 14 Annex B (informative) Recommended voltages for

24、 testing AMDs that operate with variable speeds . 19 B.1 Background of measurement 19 B.2 Recommended procedure 19 2013 Acoustical Society of America All rights reserved ii Annex C (informative) Sample specification of AMD structure-borne vibratory acceleration levels . 20 C.1 Recommended specificat

25、ion format 20 C.2 Optional specification format . 20 C.3 Determination of specification values 20 Annex D Guidance on the development of information on measurement uncertainty . 21 D.1 General 21 D.2 Model function 21 D.3 Input quantities and their contributions to measurement uncertainty 22 D.4 Unc

26、ertainty budget 24 D.5 Combined standard uncertainty and expanded uncertainty 25 Tables Table 1 Estimated values of the standard deviation of reproducibility of vibratory acceleration levels of air-moving devices determined in accordance with this part of this American National Standard 3 Table D.1

27、Example of an uncertainty budget for determination of vibratory acceleration levels 24 2013 Acoustical Society of America All rights reserved iii Foreword This Foreword is for information only, and is not a part of the American National Standard ANSI/ASA S12.11-2013/Part 2 / ISO 10302-2:2011 America

28、n National Standard Acoustics Measurement of airborne noise emitted and structure-borne vibration induced by small air-moving devices Part 2: Structure-borne vibration measurements. This standard comprises a part of a group of definitions, standards, and specifications for use in noise. It was devel

29、oped and approved by Accredited Standards Committee S12 Noise, under its approved operating procedures. Those procedures have been accredited by the American National Standards Institute (ANSI). The Scope of Accredited Standards Committee S12 is as follows: Standards, specifications, and terminology

30、 in the field of acoustical noise pertaining to methods of measurement, evaluation, and control, including biological safety, tolerance, and comfort, and physical acoustics as related to environmental and occupational noise. This standard is an identical national adoption of ISO 10302-2:2011. It rev

31、ises and replaces ANSI/ASA S12.112003/Part 2 (R 2008) American National Standard Acoustics Measurement of Noise and Vibration of Small Air-Moving Devices Part 2: Structure-Borne Vibration. ISO 10302-2:2011 was prepared by Technical Committee ISO/TC 43 Subcommittee SC 1, Noise. In conformance with AN

32、SI and ISO rules, the words “this part of this American National Standard“ replace the words “this part of ISO 10302“ where they appear in the ISO document, decimal points were substituted in place of the decimal commas used in ISO documents, and American English spelling is used in place of British

33、 English spelling. The ANSI/ASA equivalent for one of the ISO standards referenced in this standard is: ANSI/ASA S12.11-2013 Part 1 / ISO 10302-1:2011 is the identical national adoption of ISO 10302-1:2011 At the time this Standard was submitted to Accredited Standards Committee S12, Noise for appro

34、val, the membership was as follows: W.J. Murphy, Chair S.J. Lind, Vice-Chair S.B. Blaeser, Secretary 3M Occupational Health Fax: 631-390-0217; E-mail: asastdsaip.org. AMERICAN NATIONAL STANDARD ANSI/ASA S12.11-2013/Part 2 / ISO 10302-2:2011 2013 Acoustical Society of America All rights reserved 1 Am

35、erican National Standard Acoustics Measurement of airborne noise emitted and structure-borne vibration induced by small air-moving devices Part 2: Structure-borne vibration measurements (a nationally adopted international standard) 1 Scope This part of this American National Standard covers vibratio

36、n levels from small air-moving devices (AMDs) with mounting footprints of less than 0.48 m 0.90 m for the full-size test plenum defined in ISO 10302-1 and less than 0.18 m 0.3 m for the half-size plenum. It covers all types of AMDs which can be mounted on, and are self-supported at, the discharge or

37、 inlet plane of a test plenum box as specified in ISO 10302-1. The procedures defined in this part of this American National Standard specify methods for determining the vibration levels that a small AMD would induce in an average structure used in information technology and telecommunications equip

38、ment. The methods specified in this part of this American National Standard allow the determination of induced vibration levels for the individual AMD that is tested. These data can be used to determine the statistical values of vibration levels for a production series if levels are measured for sev

39、eral units of that series. 2 Normative references The following referenced documents are indispensable for the application of this standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

40、 ISO 266, Acoustics Preferred frequencies ISO 5348, Mechanical vibration and shock Mechanical mounting of accelerometers ISO 10302-1:2011, Acoustics Measurement of airborne noise emitted and structure-borne vibration induced by small air-moving devices Part 1: Airborne noise measurement ISO 16063-11

41、, Methods for the calibration of vibration and shock transducers Part 11: Primary vibration calibration by laser interferometry ISO 16063-21, Methods for the calibration of vibration and shock transducers Part 21: Vibration calibration by comparison to a reference transducer IEC 61260, Electroacoust

42、ics Octave-band and fractional-octave-band filters ISO/IEC Guide 98-3, Uncertainty in measurement Part 3: Guide to the expression of uncertainty in measurement (GUM:1995) ANSI/ASA S12.11-2013/Part 2 / ISO 10302-2:2011 2013 Acoustical Society of America All rights reserved 2 3 Terms and definitions 3

43、.1 vibratory acceleration level La ten times the logarithm to the base 10 of the ratio of the square of the root-mean-square acceleration, a, to the square of a reference value, a0, expressed in decibels L 22010 lg dBa aa (1) where the reference value, a0, is 1 m/s2 NOTE 1 The width of the frequency

44、 band is stated; for example, overall for all bands in the frequency range of interest or one-third-octave band. NOTE 2 Some other standards use other reference values. NOTE 3 In this part of this American National Standard, “vibratory acceleration level” is frequently referred to simply as “acceler

45、ation level”. 3.2 frequency range of interest one-third-octave bands with center frequencies specified in ISO 266, from 25 Hz to 5 kHz inclusive 3.3 information technology and telecommunications equipment ITT equipment equipment for information processing, and components thereof, used in homes, offi

46、ces, server installations, telecommunications installations or similar environments ISO 7779:20103, 3.1.3 NOTE ISO 10302 is intended to support the designers of ITT equipment. 4 Descriptors The primary descriptor for vibration levels induced by an AMD is the energy average of the overall unweighted

47、(non-frequency-weighted) vibratory acceleration level at the measurement locations for the frequency range of interest (3.2). This frequency range covers most of the frequency range covered by ISO 10302-1 for airborne noise from AMDs, and adds the one-third-octave bands centered at 25 Hz to 80 Hz. T

48、he detailed descriptors are the unweighted one-third-octave band acceleration levels. Although the measurement apparatus and the procedures of this part of this American National Standard can also be used in conjunction with narrow-band frequency analysis instrumentation to investigate specifics in

49、more detail, such narrow-band analysis is not specified here. NOTE Acceleration measurements are convenient because non-intrusive lightweight accelerometers are readily available and simple to use. The overall unweighted acceleration level is chosen because it is a simple measure that correlates well with the A-weighted structure-borne noise level radiated by a structure (see References 7, 11). The A-weighted structure-borne noise level radiated from a vibrating structure is determined from the avera