BS EN 61063-1996 Acoustics - Measurement of airborne noise emitted by steam turbines and driven machinery《声学 由蒸汽轮机和被驱动机器发出的气载噪音测量》.pdf

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1、BRITISH STANDARD BS EN 61063:1996 IEC 1063:1991 Acoustics Measurement of airborne noise emitted by steam turbines and driven machinery The European Standard EN 61063:1996 has the status of a British Standard ICS 17.140.20; 27.040BSEN61063:1996 This British Standard, having been prepared under the di

2、rectionof the Engineering SectorBoard, was published underthe authority of the Standards Board and comes intoeffect on 15 July 1996 BSI 10-1999 The following BSI references relate to the work on this standard: Committee reference MCE/13 Draft for comment 87/75408 DC ISBN 0 580 25677 4 Committees res

3、ponsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee MCE/13, Steam turbines, upon which the following bodies were represented: Association of Consulting Engineers Electricity Supply Industry in England and Wales North of Scotland Hydro-elec

4、tric Board Power Generation Association (BEAMA Ltd.) South of Scotland Electricity Board Amendments issued since publication Amd. No. Date CommentsBSEN61063:1996 BSI 10-1999 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 Text of EN 61063 3 List of reference

5、s Inside back coverBSEN61063:1996 ii BSI 10-1999 National foreword This British Standard has been prepared by Technical Committee MCE/13 and is the English language version ofEN61063:1996 Acoustics Test code for the measurement of airborne noise emitted by steam turbines and driven machinery publish

6、ed by the European Committee for Electrotechnical Standardization (CENELEC). It is identical withIEC1063:1991 published by the International Electrotechnical Commission (IEC). For graphical symbols, and letter symbols and signs approved by the IEC for general use, readers are referred to: IEC Public

7、ation 27: Letter symbols to be used in electrical technology IEC Publication 617: Graphical symbols for diagrams The symbols and signs contained in the present publication have either been taken from IEC Publication27or617, or been specifically approved for the purpose of this publication. For gener

8、al terminology, readers are referred to IEC Publication 50: International Electrotechnical Vocabulary (IEV), which is issued in the form of separate chapters each dealing with a specific field, the General Index being published as a separate booklet. Full details of the IEV will be supplied on reque

9、st 1) . The terms and definitions contained in the present publication have either been taken from the IEC or have been specifically approved for the purpose of this publication. Some Sections and Parts ofBS4727 are identical with or technically equivalent to IEC Publication 50. All Parts ofBS3939,

10、except for Part1, are identical with IEC Publication617. EN61063 was produced as a result of international discussion in which the United Kingdom took an active part. 1) Available from BSI, Customer Services, Sales Department, 389 Chiswick High Road, London W4 4AL. Cross-references Publication refer

11、red to Corresponding British Standard IEC 50(801):1984 a BS 4727 Glossary of electrotechnical, power, telecommunication, electronics, lighting and colour terms Part 3 Terms particular to telecommunications and electronics Group 08:1995 Acoustics and electroacoustics IEC 268-4:1972 BS 6840 Sound syst

12、em equipment Part 4:1987 Methods for specifying and measuring the characteristics of microphones EN 60651:1994 (IEC 651:1979) BS EN 60651:1994 Specification for sound level meters ISO 3740:1980 BS 4196 Sound power levels of noise sources Part 0:1981 Guide for the use of basic standards and for the p

13、reparation of noise test codes ISO 3744:1981 b BS EN ISO 3744:1995 Acoustics. Determination of sound power levels of noise sources using sound pressure. Engineering method in essentially free-field over a reflecting plane a IEC 50(801):1984 has been superseded by IEC 50(801):1994 with which the Brit

14、ish Standard cited is identical. b ISO 3744:1981 has been superseded by ISO 3744:1994 with which the British Standard cited is identical.BSEN61063:1996 BSI 10-1999 iii A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsibl

15、e for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. ISO 3746:1979 BS 4196 Sound power levels of noise sources Part 6:1981 Survey method for determination of sound power levels of noise sources Summary of pages This document c

16、omprises a front cover, an inside front cover, pages i to iv, theENtitle page, pages 2 to 14, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.i

17、v blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 61063 January 1996 ICS 17.140.20 Descriptors: Acoustics, acoustic measurement, acoustic test, machine noise, air noise, turbine, environment, acoustic pressure, level, calculation English version Acoustics Measurement of airborne noise emit

18、ted by steam turbines and driven machinery (IEC 1063:1991) Acoustique Mesure de bruit arien mis par les turbines vapeur et les machines entranes (CEI1063:1991) Akustik Messung von luftbertragenen Geruschen emittiert von Dampfturbinen und angetriebenen Maschinen (IEC 1063:1991) This European Standard

19、 was approved by CENELEC on 1995-05-15. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning

20、such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its ow

21、n language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Swe

22、den, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1996 Copyright reserved to CENELEC members Re

23、f. No. EN 61063:1996 EEN61063:1996 BSI 10-1999 2 Foreword The text of the International Standard IEC1063:1991, prepared by IEC TC5, Steam turbines, was submitted to the formal vote and was approved by CENELEC asEN61063 on1995-05-15 without any modification. The following dates were fixed: Annexes de

24、signated “normative” are part of the body of the standard. In this standard,Annex A andAnnex ZA are normative.Annex ZA has been added by CENELEC. Contents Page Foreword 2 Introduction 3 1 Scope 3 2 Normative references 4 3 Definitions 5 4 Acoustic environment 5 5 Instrumentation 6 6 Installation and

25、 operation of turbine set 6 7 Measurement of A-weighted sound pressure level 6 8 Calculation of surface sound pressure level and sound power level 8 9 Information to be recorded 9 10 Information to be reported 10 Annex A (normative) Test environment qualification procedure 11 Annex ZA (normative) No

26、rmative references to international publications with their corresponding European publications 14 Figure 1 General situation of the turbine sets, including their ancillaries and auxiliaries 3 Figure 2 Typical arrangements of microphone positions 7 Figure A.3 Environmental correction K, in decibels

27、12 Table 1 Uncertainty in determining A-weighted sound power level by the survey method 4 Table 2 Correction for background noise 8 latest date by which the ENhas to be implemented at national level by publication of an identical national standard or by endorsement (dop) 1996-07-01 latest date by wh

28、ich the national standards conflicting with the EN haveto be withdrawn (dow) 1996-07-01EN61063:1996 BSI 10-1999 3 Introduction This standard is based onISO3746 and has been drafted in accordance withISO3740. The main purpose of this standard is to describe a method for the measurement of noise radia

29、ted by steam-turbines including driven machinery operating under steady state conditions. The results are expressed in sound power levels and in sound pressure levels. NOTEFor special environmental conditions, it may be possible to use the engineering methods based onISO3744 resulting in a higher gr

30、ade of accuracy. In this case no reference to this standard will be made. 1 Scope 1.1 General 1.1.1 This International Standard applies to the measurement of airborne noise emitted by assemblies comprising steam turbines and driven machinery, hereinafter referred to as turbine sets. These sets are o

31、f all sizes without limitation of output when fitted with their normal auxiliaries. This standard applies only to the part of the turbine set (turbine, generator and attached components) located above the floor of the turbine room and inside a continuous enveloping measurement surface bounded by thi

32、s floor. An extensive and continuous turbine operating floor of a reflecting nature above the turbine foundation floor level shall be considered as the reflecting plane. 1.1.2 In the case of large turbine sets, the turbine operating floor is often located below and near the horizontal centreline of

33、the turbine (seeFigure 1). If this floor is continuous and free from openings which would otherwise allow noise radiated below the turbine operating floor to influence the noise measured at microphone locations, a valid measure of the turbine set noise emission may be obtained by use of this standar

34、d. 1.1.3 In the case where the turbine operating floor is located below and near the horizontal centerline of the turbine set, but consists of: a) an open grating construction, or b) a solid floor with openings near to the boundary of the turbine set, or c) walkways typically1to2m wide of either sol

35、id or grated construction, the turbine operating floor cannot be considered as a reflecting plane. In this case the reflecting plane will be the turbine set foundation floor. Figure 1 General situation of the turbine sets, including their ancillaries and auxiliariesEN61063:1996 4 BSI 10-1999 In the

36、case of the continuous enveloping measurement surface being bounded by either the turbine operating floor or the turbine foundation floor, a large contribution from the noise of ancillary and auxiliary plant located below the turbine operating floor may be expected at the microphone measuring positi

37、ons. In this case the use of this standard for the determination of sound power levels is not valid. If this standard is to be employed for the purpose of the comparison of the1m sound levels of similar turbines, the turbine operating floor shall be used as the bounding surface for the continuous en

38、veloping measurement surface. The validity of comparative measurements will depend on the noise present at the measurement positions due to auxiliary and ancillary plant and it will be necessary to define exactly the number, type and location of these items. It is preferable to establish the effect

39、auxiliary and ancillary plant noise radiation will have on the sound level at the microphone locations by determining the noise emission of these items in accordance with ISO3746, and determining the propagation of this noise to microphone locations. However, this procedure is beyond the scope of th

40、is standard. NOTEWhen openings in the floor are suitably blocked during the test with appropriate panels (upper side of panels should have same reflective characteristics as the turbine operating floor), valid measurements are permitted. 1.1.4 In the case of turbine sets mounted on, or partially sub

41、merged in, the foundation floor, which may also be defined as the turbine operating floor, a valid measure of the turbine set noise emission may be obtained by use of this standard. 1.1.5 Where noise control treatments such as enclosures and/or screens are fitted to the turbine set, driven equipment

42、 and auxiliaries, the type, location and extent of treatment shall be reported. 1.2 Measurement uncertainty Measurements made in conformity with this standard tend to result in standard deviations which are equal to or less than those given inTable 1. Table 1 Uncertainty in determining A-weighted so

43、und power level by the survey method NOTE 1If the method specified in this standard is used to compare the sound power levels of similar machines that are omnidirectional and radiate broad band noise, the uncertainty in this comparison tends to result in a standard deviation which is equal to or les

44、s than3dB provided that the measurements are performed in similar environments. NOTE 2The standard deviations given in this table reflect the cumulative effects of all causes of measurement uncertainty, excluding variations in the sound power level from machine to machine or from test to test which

45、may be caused, for example, by changes in the mounting or operating conditions of the source. The reproducibility and repeatability of the test results may be considerably better (i.e. indicate smaller deviations) than the uncertainties given inTable 1 would indicate. NOTE 3The standard deviations g

46、iven above are considered, in the light of the experimental evidence available, to be conservative. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions

47、indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently vali

48、d International Standards. IEC 50(801):1984, International Electrotechnical Vocabulary (IEV) Chapter 801: Acoustics and electro-acoustics. IEC 268-4:1972, Sound-system equipment Part 4: Microphones. IEC 651:1979, Sound level meters. ISO 3740:1980, Acoustics Determination of sound power levels of noi

49、se sources Guidelines for the use of basic standards and for the preparation of noise test codes. ISO 3744:1981, Acoustics Determination of sound power levels of noise sources Engineering methods for free-field conditions over a reflecting plane. ISO 3746:1979, Acoustics Determination of sound power levels of noise sources Survey method. Application Standard deviation dB For a source which produces sounds that contain prominent discrete tones 5 For a source which produces sounds that are uniformly distributed in frequency ov