BS EN ISO 10846-2-2008 Acoustics and vibration - Laboratory measurement of vibro-acoustic transfer properties of resilient elements -Part 2 Direct method for determination of the d.pdf

1、BS EN ISO10846-2:2008ICS 17.140.01NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDAcoustics andvibration Laboratorymeasurement of vibro-acoustic transferproperties of resilientelementsPart 2: Direct method fordetermination of the dynamic stiffnessof resilient su

2、pports for translatorymotion (ISO 10846-2:2008)This British Standardwas published underthe authority of theStandards Policy andStrategy Committee on 30September 2008 BSI 2008ISBN 978 0 580 54120 9Amendments/corrigenda issued since publicationDate CommentsBS EN ISO 10846-2:2008National forewordThis B

3、ritish Standard is the UK implementation of EN ISO10846-2:2008. It supersedes BS EN ISO 10846-2:1999 which iswithdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee EH/1/4, Machinery noise.A list of organizations represented on this committee can be obtained onrequest t

4、o its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunityfrom legal obligations.EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 10846-2Augus

5、t 2008ICS 17.140.01 Supersedes EN ISO 10846-2:1998 English VersionAcoustics and vibration - Laboratory measurement of vibro-acoustic transfer properties of resilient elements - Part 2: Directmethod for determination of the dynamic stiffness of resilientsupports for translatory motion (ISO 10846-2:20

6、08)Acoustique et vibrations - Mesurage en laboratoire desproprits de transfert vibro-acoustique des lmentslastiques - Partie 2: Mthode directe pour la dterminationde la raideur dynamique en translation des supportslastiques (ISO 10846-2:2008)Akustik und Schwingungstechnik - Laborverfahren zurMessung

7、 der vibro-akustischen Transfereigenschaftenelastischer Elemente - Teil 2: Direktes Verfahren zurErmittlung der dynamischen Steifigkeit elastischerSttzelemente bei Anregung in translatorischer Richtung(ISO 10846-2:2008)This European Standard was approved by CEN on 12 April 2008.CEN members are bound

8、 to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN M

9、anagement Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as

10、 theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovaki

11、a, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights of exploitation in any form and by any means reservedworldwide for C

12、EN national Members.Ref. No. EN ISO 10846-2:2008: EBS EN ISO 10846-2:2008EN ISO 10846-2:2008 (E) 3 Foreword This document (EN ISO 10846-2:2008) has been prepared by Technical Committee ISO/TC 43 “Acoustics“ in collaboration with Technical Committee CEN/TC 211 “Acoustics” the secretariat of which is

13、held by DS. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by February 2009, and conflicting national standards shall be withdrawn at the latest by February 2009. Attention is drawn to the possibili

14、ty that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 10846-2:1998. According to the CEN/CENELEC Internal Regulations, the national standards o

15、rganizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal

16、, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 10846-2:2008 has been approved by CEN as a EN ISO 10846-2:2008 without any modification. BS EN ISO 10846-2:2008ISO 10846-2:2008(E) ISO 2008 All rights reserved iiiContents Page Forewo

17、rd iv Introduction v 1 Scope . 1 2 Normative references . 2 3 Terms and definitions. 3 4 Principle. 6 5 Requirements for apparatus 6 5.1 Normal translations 6 5.2 Transverse translations . 8 5.3 Suppression of unwanted vibrations 11 6 Criteria for adequacy of the test arrangement. 12 6.1 Frequency r

18、ange. 12 6.2 Measurement of blocking force. 12 6.3 Flanking transmission 13 6.4 Unwanted input vibrations. 13 6.5 Accelerometers . 14 6.6 Force transducers. 14 6.7 Summation of signals. 14 6.8 Analysers. 15 7 Test procedures 15 7.1 Installation of the test elements 15 7.2 Selection of force measurem

19、ent system and output-force distribution plates 15 7.3 Mounting and connection of accelerometers 15 7.4 Mounting and connections of the vibration exciter 16 7.5 Source signal 16 7.6 Measurements. 16 7.7 Test for linearity 17 8 Evaluation of test results . 18 8.1 Calculation of dynamic transfer stiff

20、ness 18 8.2 One-third-octave-band values of the frequency-averaged dynamic transfer stiffness. 18 8.3 Presentation of one-third-octave-band results 19 8.4 Presentation of narrow-band data 20 9 Information to be recorded 21 10 Test report . 22 Annex A (informative) Static load-deflection curve 23 Ann

21、ex B (informative) Measurement uncertainty . 24 Bibliography . 28 BS EN ISO 10846-2:2008ISO 10846-2:2008(E) iv ISO 2008 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of prepari

22、ng International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in lia

23、ison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of

24、technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is

25、drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 10846-2 was prepared by Technical Committee ISO/TC 43, Acoustics, Subcommittee SC 1, Noise, and ISO/TC 108, Me

26、chanical vibration, shock and condition monitoring. This second edition cancels and replaces the first edition (ISO 10846-2:1997), which has been technically revised. ISO 10846 consists of the following parts, under the general title Acoustics and vibration Laboratory measurement of vibro-acoustic t

27、ransfer properties of resilient elements: Part 1: Principles and guidelines Part 2: Direct method for determination of the dynamic stiffness of resilient supports for translatory motion Part 3: Indirect method for determination of the dynamic stiffness of resilient supports for translatory motion Pa

28、rt 4: Dynamic stiffness of elements other than resilient supports for translatory motion Part 5: Driving point method for determination of the low-frequency transfer stiffness of resilient supports for translatory motion BS EN ISO 10846-2:2008ISO 10846-2:2008(E) ISO 2008 All rights reserved vIntrodu

29、ction Passive resilient elements of various kinds are used to reduce the transmission of vibrations. Examples are automobile engine mounts, resilient supports for buildings, resilient mounts and flexible shaft couplings for shipboard machinery and small isolators in household appliances. This part o

30、f ISO 10846 specifies a direct method for measuring the dynamic transfer stiffness function of linear resilient supports. This includes resilient supports with non-linear static load-deflection characteristics, as long as the elements show an approximate linearity for vibration behaviour for a given

31、 static preload. This part of ISO 10846 belongs to a series of International Standards on methods for the laboratory measurement of vibro-acoustic properties of resilient elements, which also includes documents on measurement principles, on an indirect method and on a driving point method. ISO 10846

32、-1 provides guidance for the selection of the appropriate International Standard. The laboratory conditions described in this part of ISO 10846 include the application of static preload. The results of the method described in this part of ISO 10846 are useful for resilient supports that are used to

33、prevent low-frequency vibration problems and to attenuate structure-borne sound in the lower part of the audible frequency range. However, for complete characterization of resilient elements that are used to attenuate low- frequency vibration or shock excursions, additional information is needed, wh

34、ich is not provided by this method. BS EN ISO 10846-2:2008BS EN ISO 10846-2:2008INTERNATIONAL STANDARD ISO 10846-2:2008(E) ISO 2008 All rights reserved 1Acoustics and vibration Laboratory measurement of vibro-acoustic transfer properties of resilient elements Part 2: Direct method for determination

35、of the dynamic stiffness of resilient supports for translatory motion 1 Scope This part of ISO 10846 specifies a method for determining the dynamic transfer stiffness for translations of resilient supports, under specified preload. The method concerns the laboratory measurement of vibrations on the

36、input side and blocking output forces and is called “the direct method”. The method is applicable to test elements with parallel flanges (see Figure 1). Resilient elements, which are the subject of this part of ISO 10846, are those which are used to reduce the transmission of vibration in the lower

37、part of the audible frequency range (typically 20 Hz to 500 Hz) to a structure which may, for example, radiate unwanted fluid-borne sound (airborne, waterborne or others), and the transmission of low-frequency vibrations (typically 1 Hz to 80 Hz), which may, for example, act upon human subjects or c

38、ause damage to structures of any size when vibration is too severe. NOTE 1 In practice, the size of the available test rig(s) can restrict the use of very small or very large resilient supports. NOTE 2 Samples of continuous supports of strips and mats are included in this method. Whether or not the

39、sample describes the behaviour of the complex system sufficiently is the responsibility of the user of this part of ISO 10846. Measurements for translations normal and transverse to the flanges are covered in this part of ISO 10846. The direct method covers the frequency range from 1 Hz up to a freq

40、uency fUL, which is usually determined by the test rig. NOTE 3 Because of the large variety of test rigs and test elements, fULis variable. In this part of ISO 10846, the adequacy of the test rig is not defined for a fixed frequency range, but on the basis of measured data, as described in 6.1 to 6.

41、4. BS EN ISO 10846-2:2008ISO 10846-2:2008(E) 2 ISO 2008 All rights reservedNOTE 1 When a resilient support has no parallel flanges, an auxiliary fixture is included as part of the test element to arrange for parallel flanges. NOTE 2 The arrows indicate the load direction. Figure 1 Example of resilie

42、nt supports with parallel flanges The data obtained according to the method specified in this part of ISO 10846 can be used for the following: product information provided by manufacturers and suppliers; information during product development; quality control; calculation of the transfer of vibratio

43、n energy through isolators. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies

44、. ISO 266, Acoustics Preferred frequencies ISO 2041:1), Mechanical vibration, shock and condition monitoring Vocabulary ISO 5348, Mechanical vibration and shock Mechanical mounting of accelerometers ISO 7626-1, Vibration and shock Experimental determination of mechanical mobility Part 1: Basic defin

45、itions and transducers ISO 10846-1, Acoustics and vibration Laboratory measurement of vibro-acoustic transfer properties of resilient elements Part 1: Principles and guidelines ISO 16063-21, Methods for the calibration of vibration and shock transducers Part 21: Vibration calibration by comparison t

46、o a reference transducer ISO/IEC Guide 98-32), Uncertainty of measurement Part 3: Guide to the expression of uncertainty in measurement (GUM 1995) 1) To be published. (Revision of ISO 2041:1990) 2) ISO/IEC Guide 98-3 will be published as a re-issue of the Guide to expression of uncertainty in measur

47、ement (GUM), 1995. BS EN ISO 10846-2:2008ISO 10846-2:2008(E) ISO 2008 All rights reserved 33 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 2041 and the following apply. 3.1 vibration isolator resilient element isolator designed to attenuate the trans

48、mission of the vibration in a certain frequency range NOTE Adapted from ISO 2041:1), definition 2.120. 3.2 resilient support vibration isolator(s) suitable for supporting a machine, a building or another type of structure 3.3 test element resilient support undergoing testing, including flanges and a

49、uxiliary fixtures, if any 3.4 blocking force Fbdynamic force on the output side of a vibration isolator, which results in a zero displacement output 3.5 dynamic transfer stiffness k2,1frequency-dependent ratio of the blocking force phasor F2,bon the output side of a resilient element to the displacement phasor u1on the input side 2,b 12,1k= /uF NOTE 1 The subscripts “1”and “2” denote the input and output sides, respectively. NOTE 2 The value of 2,1k can be dependent on the static preload, temperatu