DIN 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.pdf

1、November 2008DEUTSCHE NORM English price group 15No part of this standard may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 17.140.01; 17.160!$Rd

2、_“1476560www.din.deDDIN EN ISO 10846-2Acoustics and vibration Laboratory measurement of vibro-acoustic transfer properties ofresilient elements Part 2: Direct method for determination of the dynamic stiffness ofresilient supports for translatory motion (ISO 10846-2:2008)English version of DIN EN ISO

3、 10846-2:2008-11Akustik und Schwingungstechnik Laborverfahren zur Messung der vibro-akustischen Transfereigenschaften elastischerElemente Teil 2: Direktes Verfahren zur Ermittlung der dynamischen Steifigkeit elastischerSttzelemente bei Anregung in translatorischer Richtung (ISO 10846-2:2008)Englisch

4、e Fassung DIN EN ISO 10846-2:2008-11SupersedesDIN EN ISO 10846-2:1999-04www.beuth.deDocument comprises 36 pagesDIN EN ISO 10846-2:2008-11 2 National foreword This standard has been prepared by Technical Committee ISO/TC 43 “Acoustics”, Subcommittee SC 1 “Noise”, and Technical Committee ISO/TC 108 “M

5、echanical vibration, shock and condition monitoring” in collaboration with Technical Committee CEN/TC 211 “Acoustics” (Secretariat: DS, Denmark). The responsible German body involved in its preparation was the Normenausschuss Akustik, Lrmminderung und Schwingungstechnik im DIN und VDI (Acoustics, No

6、ise Control and Vibration Engineering Standards Committee in DIN and VDI), Technical Committee VDI/NALS C 20 Schwingungs- und Storeduzierung Verfahren und Elemente. ISO 10846 consists of the following parts, under the general title Acoustics and vibration Laboratory measurement of vibro-acoustic tra

7、nsfer 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 Part

8、 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 The DIN Standards corresponding to the International Standards and other document

9、s referred to in the ISO Standard are as follows: ISO 266 DIN EN ISO 266 ISO 1683 DIN EN 21683 ISO 5348 DIN ISO 5348 ISO 10846 standards series DIN EN ISO 10846 standards series ISO 16063-21 DIN ISO 16063-21 ISO/IEC Guide 98-3 DIN V ENV 13005 Amendments This standard differs from DIN EN ISO 10846-2:

10、1999-04 as follows: a) The title of the standard has been modified. b) The figures now include symmetrical arrangements of test objects for excitation in the transverse direction. c) Annex B dealing with measurement uncertainty has been included. Previous editions DIN EN ISO 10846-2: 1999-04 DIN EN

11、ISO 10846-2:2008-11 3 National Annex NA (informative) Bibliography DIN V ENV 13005, Guide to the expression of uncertainty in measurement DIN EN 21683, Acoustics Preferred reference quantities for acoustic levels DIN EN ISO 266, Acoustics Preferred frequencies DIN EN ISO 10846, standards series, Aco

12、ustics and vibration Laboratory measurement of vibro-acoustic transfer properties of resilient elements DIN ISO 5348, Mechanical vibration and shock Mechanical mounting of accelerometers DIN ISO 16063-21, Methods for the calibration of vibration and shock transducers Part 21: Vibration calibration b

13、y comparison to a reference transducer DIN EN ISO 10846-2:2008-11 4 This page is intentionally blank EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 10846-2August 2008ICS 17.140.01 Supersedes EN ISO 10846-2:1998 English VersionAcoustics and vibration - Laboratory measurement of vibro-acoustic

14、transfer properties of resilient elements - Part 2: Directmethod for determination of the dynamic stiffness of resilientsupports for translatory motion (ISO 10846-2:2008)Acoustique et vibrations - Mesurage en laboratoire desproprits de transfert vibro-acoustique des lmentslastiques - Partie 2: Mthod

15、e directe pour la dterminationde la raideur dynamique en translation des supportslastiques (ISO 10846-2:2008)Akustik und Schwingungstechnik - Laborverfahren zurMessung der vibro-akustischen Transfereigenschaftenelastischer Elemente - Teil 2: Direktes Verfahren zurErmittlung der dynamischen Steifigke

16、it 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 to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a

17、national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version i

18、n 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 theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, E

19、stonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPI

20、SCHES 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 CEN national Members.Ref. No. EN ISO 10846-2:2008: EDIN EN ISO 10846-2:2008-11 EN ISO 10846-2:2008 (E) 2Contents Page Foreword.3 Intro

21、duction4 1 Scope .5 2 Normative references .6 3 Terms and definitions 7 4 Principle.10 5 Requirements for apparatus10 5.1 Normal translations 10 5.2 Transverse translations .12 5.3 Suppression of unwanted vibrations .15 6 Criteria for adequacy of the test arrangement 16 6.1 Frequency range.16 6.2 Me

22、asurement of blocking force 16 6.3 Flanking transmission17 6.4 Unwanted input vibrations 17 6.5 Accelerometers.18 6.6 Force transducers 18 6.7 Summation of signals 18 6.8 Analysers.19 7 Test procedures19 7.1 Installation of the test elements19 7.2 Selection of force measurement system and output-for

23、ce distribution plates .19 7.3 Mounting and connection of accelerometers19 7.4 Mounting and connections of the vibration exciter 20 7.5 Source signal 20 7.6 Measurements.20 7.7 Test for linearity21 8 Evaluation of test results.22 8.1 Calculation of dynamic transfer stiffness22 8.2 One-third-octave-b

24、and values of the frequency-averaged dynamic transfer stiffness 22 8.3 Presentation of one-third-octave-band results .23 8.4 Presentation of narrow-band data 24 9 Information to be recorded25 10 Test report .26 Annex A (informative) Static load-deflection curve27 Annex B (informative) Measurement un

25、certainty .28 Bibliography.32 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 held by DS. This European Standard shall be given the status of a nat

26、ional 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 possibility that some of the elements of this document may be the subject of p

27、atent 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 organizations of the following countries are bound to implement this E

28、uropean 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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the Uni

29、ted 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. 3 DIN EN ISO 10846-2:2008-11 EN ISO 10846-2:2008 (E)Introduction Passive resilient elements of various kinds are used to reduce the transmission of vibrations. Exa

30、mples 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 of ISO 10846 specifies a direct method for measuring the dynamic transfer stiffness function of linear re

31、silient 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 static preload. This part of ISO 10846 belongs to a series of International Standards on methods for th

32、e 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 10846-1 provides guidance for the selection of the appropriate International Standard. The laboratory conditi

33、ons 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 prevent low-frequency vibration problems and to attenuate structure-borne sound in the lower part of the

34、 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, which is not provided by this method. 4 DIN EN ISO 10846-2:2008-11 EN ISO 10846-2:2008 (E)1 Scope This par

35、t 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 input side and blocking output forces and is called “the direct method”. The method is

36、 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 part of the audible frequency range (typically 20 Hz to 500 Hz) to a structure which m

37、ay, 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 cause damage to structures of any size when vibration is too severe. NOTE 1 In practice

38、, 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 sample describes the behaviour of the complex system sufficiently is the responsibilit

39、y 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 frequency fUL, which is usually determined by the test rig. NOTE 3 Because of the large va

40、riety 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 6.4. 5 DIN EN ISO 10846-2:2008-11 EN ISO 10846-2:2008 (E)NOTE 1 When a resilient support

41、 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 resilient supports with parallel flanges The data obtained according to the method specified in this part of ISO

42、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 vibration energy through isolators. 2 Normative references The following referenced documents are indispensable fo

43、r 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. ISO 266, Acoustics Preferred frequencies ISO 2041:1), Mechanical vibration, shock and condition monitori

44、ng 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 definitions and transducers ISO 10846-1, Acoustics and vibration Laboratory measurement of vibro-acoustic trans

45、fer 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 to a reference transducer ISO/IEC Guide 98-32), Uncertainty of measurement Part 3: Guide to the expression

46、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 measurement (GUM), 1995. 6 DIN EN ISO 10846-2:2008-11 EN ISO 10846-2:2008 (E)3 Terms and definitions For the pur

47、poses 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 transmission of the vibration in a certain frequency range NOTE Adapted from ISO 2041:1), definition 2.120. 3.2 resilient support v

48、ibration 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 auxiliary fixtures, if any 3.4 blocking force Fbdynamic force on the output side of a vibration isolator, which results in a ze

49、ro 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, temperature, relative humidity and other conditions. NOTE 3 At low frequencies, 2,1k is solely determined by elastic and dissipative force