EN ISO 10846-1-2008 en Acoustics and vibration - Laboratory measurement of vibroacoustic transfer properties of resilient elements - Part 1 Principles and guidelines《声学和振动 弹性元件的振动-.pdf

1、BS EN ISO10846-1:2008ICS 17.140.01,NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDAcoustics andvibration Laboratorymeasurement of vibro-acoustic transferproperties of resilientelementsPart 1: Principles and guidelines (ISO10846-1:2008)This British Standardwas p

2、ublished underthe authority of theStandards Policy andStrategy Committee on 31 BSI 2009ISBN 978 0 580 53987 9Amendments/corrigenda issued since publicationDate CommentsBS EN ISO 10846-1:2008National forewordThis British Standard is the UK implementation of EN ISO10846-1:2008. It supersedes BS EN ISO

3、 10846-1:1999 and 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 to its secretary.This publication does not purport to include all the necessary prov

4、isionsof a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunityfrom legal obligations.January 2009EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 10846-1August 2008ICS 17.140.01 Supersedes EN ISO 10846-1:1998 English VersionAcous

5、tics and vibration - Laboratory measurement of vibro-acoustic transfer properties of resilient elements - Part 1:Principles and guidelines (ISO 10846-1:2008)Acoustique et vibrations - Mesurage en laboratoire desproprits de transfert vibro-acoustique des lmentslastiques - Partie 1: Principes et ligne

6、s directrices (ISO10846-1:2008)Akustik und Schwingungstechnik - Laborverfahren zurMessung der vibro-akustischen Transfereigenschaftenelastischer Elemente - Teil 1: Grundlagen und bersicht(ISO 10846-1:2008)This European Standard was approved by CEN on 12 April 2008.CEN members are bound to comply wit

7、h 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 Management Cent

8、re 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 theofficial v

9、ersions.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, Slovakia, Slovenia, S

10、pain, 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 CEN national Me

11、mbers.Ref. No. EN ISO 10846-1:2008: EBS EN ISO 10846-1:2008EN ISO 10846-1:2008 (E) 3 Foreword This document (EN ISO 10846-1:2008) 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. Th

12、is 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 possibility that some o

13、f 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 10846-1:1998. According to the CEN/CENELEC Internal Regulations, the national standards organizations o

14、f 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, Romania, Slo

15、vakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 10846-1:2008 has been approved by CEN as a EN ISO 10846-1:2008 without any modification. BS EN ISO 10846-1:2008ISO 10846-1:2008(E) ISO 2008 All rights reserved iiiContents Page Foreword iv Introduc

16、tion v 1 Scope . 1 2 Normative references . 1 3 Terms and definitions. 2 4 Selection of appropriate International Standard . 4 5 Theoretical background . 4 5.1 Dynamic transfer stiffness. 4 5.2 Dynamic stiffness matrix of resilient elements . 5 5.3 Number of relevant blocked transfer stiffnesses 7 5

17、.4 Flanking transmission 8 5.5 Loss factor. 8 6 Measurement principles. 9 6.1 Dynamic transfer stiffness. 9 6.2 Direct method 9 6.3 Indirect method. 11 6.4 Driving point method 14 Annex A (informative) Functions related to dynamic stiffness . 16 Annex B (informative) Effect of symmetry on the transf

18、er stiffness matrix. 17 Annex C (informative) Simplified transfer stiffness matrices 20 Annex D (informative) Linearity of resilient elements 22 Bibliography . 23 BS EN ISO 10846-1:2008ISO 10846-1:2008(E) iv ISO 2008 All rights reservedForeword ISO (the International Organization for Standardization

19、) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing 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 repr

20、esented on that committee. International organizations, governmental and non-governmental, in liaison 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 ar

21、e drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of 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 Internation

22、al Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is 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 10846-1 was p

23、repared by Technical Committee ISO/TC 43, Acoustics, Subcommittee SC 1, Noise, and ISO/TC 108, Mechanical vibration, shock and condition monitoring. This second edition cancels and replaces the first edition (ISO 10846-1:1997), which has been technically revised. ISO 10846 consists of the following

24、parts, under the general title Acoustics and vibration Laboratory measurement of vibro-acoustic transfer 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

25、method for determination of the dynamic stiffness of resilient supports for translatory motion Part 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 t

26、ranslatory motion BS EN ISO 10846-1:2008ISO 10846-1:2008(E) ISO 2008 All rights reserved vIntroduction Passive vibration isolators of various kinds are used to reduce the transmission of vibrations. Examples include automobile engine mounts, resilient supports for buildings, resilient mounts and fle

27、xible shaft couplings for shipboard machinery and small isolators in household appliances. This part of ISO 10846 serves as an introduction and a guide to ISO 10846-2, ISO 10846-3, ISO 10846-4 and ISO 10846-5, which describe laboratory measurement methods for the determination of the most important

28、quantities which govern the transmission of vibrations through linear resilient elements, i.e. frequency-dependent dynamic transfer stiffnesses. This part of ISO 10846 provides the theoretical background, the principles of the methods, the limitations of the methods, and guidance for the selection o

29、f the most appropriate standard of the series. The laboratory conditions described in all parts of ISO 10846 include the application of static preload, where appropriate. The results of the methods are useful for resilient elements, which are used to prevent low-frequency vibration problems and to a

30、ttenuate structure-borne sound. 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 these methods. BS EN ISO 10846-1:2008BS EN ISO 10846-1:2008INTERNATIONAL STA

31、NDARD ISO 10846-1:2008(E) ISO 2008 All rights reserved 1Acoustics and vibration Laboratory measurement of vibro-acoustic transfer properties of resilient elements Part 1: Principles and guidelines 1 Scope This part of ISO 10846 explains the principles underlying ISO 10846-2, ISO 10846-3, ISO 10846-4

32、 and ISO 10846-5 for determining the transfer properties of resilient elements from laboratory measurements, and provides assistance in the selection of the appropriate part of this series. It is applicable to resilient elements that are used to reduce a) the transmission of audio frequency vibratio

33、ns (structure-borne sound, 20 Hz to 20 kHz) to a structure which may, for example, radiate fluid-borne sound (airborne, waterborne, or other), and b) 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

34、of any size when the vibration is too severe. The data obtained with the measurement methods, which are outlined in this part of ISO 10846 and further detailed in ISO 10846-2, ISO 10846-3, ISO 10846-4 and ISO 10846-5, can be used for product information provided by manufacturers and suppliers, infor

35、mation during product development, quality control, and calculation of the transfer of vibrations through resilient elements. The conditions for the validity of the measurement methods are a) linearity of the vibrational behaviour of the resilient elements (this includes elastic elements with non-li

36、near static load-deflection characteristics, as long as the elements show approximate linearity for vibrational behaviour for a given static preload), and b) the contact interfaces of the vibration isolator with the adjacent source and receiver structures can be considered as point contacts. 2 Norma

37、tive 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. ISO 2041:1), Mechanical vibration

38、, shock and condition monitoring Vocabulary 1) To be published. (Revision of ISO 2041:1990) BS EN ISO 10846-1:2008ISO 10846-1:2008(E) 2 ISO 2008 All rights reservedISO/IEC Guide 98-3 2), Uncertainty of measurement Part 3: Guide to the expression of uncertainty in measurement (GUM 1995) 3 Terms and d

39、efinitions 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 transmission of the vibration in a certain frequency range NOTE Adapted from ISO 2041:1), definition 2.120. 3

40、.2 resilient support vibration isolator(s) suitable for supporting a machine, a building or another type of structure 3.3 test element resilient element undergoing testing, including flanges and auxiliary fixtures, if any 3.4 blocking force Fbdynamic force on the output side of a vibration isolator

41、which results in a zero displacement output 3.5 dynamic driving point stiffness k1,1frequency-dependent ratio of the force phasor F1on the input side of a vibration isolator with the output side blocked to the displacement phasor u1on the input side 1,111=/uFkNOTE 1 The subscripts “1” denote that th

42、e force and displacement are measured on the input side. NOTE 2 The value of k1,1can be dependent on the static preload, temperature, relative humidity and other conditions. NOTE 3 At low frequencies, elastic and dissipative forces solely determine k1,1. At higher frequencies, inertial forces play a

43、 role as well. 3.6 dynamic driving point stiffness of inverted vibration isolator k2,2dynamic driving point stiffness, with the physical input and output sides of the vibration isolator interchanged NOTE At low frequencies, where elastic and dissipative forces solely determine the driving point stif

44、fness, k1,1= k2,2. At higher frequencies inertial forces play a role as well and k1,1and k2,2will be different in case of asymmetry. 2) ISO/IEC Guide 98-3 will be published as a re-issue of the Guide to the expression of uncertainty in measurement (GUM), 1995. BS EN ISO 10846-1:2008ISO 10846-1:2008(

45、E) ISO 2008 All rights reserved 33.7 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 2,12,b 1=/uFkNOTE 1 The subscripts “1”and “2” denote the input and output sides, res

46、pectively. NOTE 2 The value of k2,1can be dependent on the static preload, temperature and other conditions. NOTE 3 At low frequencies, k2,1is mainly determined by elastic and dissipative forces and 1,1 2,1kk . At higher frequencies, inertial forces in the resilient element play a role as well and 1

47、,1 2,1kk . 3.8 loss factor of resilient element h ratio of the imaginary part of k2,1to the real part of k2,1, i.e. tangent of the phase angle of k2,1, in the low-frequency range where inertial forces in the element are negligible 3.9 point contact contact area which vibrates as the surface of a rig

48、id body 3.10 linearity property of the dynamic behaviour of a resilient element, if it satisfies the principle of superposition NOTE 1 The principle of superposition can be stated as follows: if an input x1(t) produces an output y1(t) and in a separate test an input x2(t) produces an output y2(t), s

49、uperposition holds if the input a x1(t) + b x2(t) produces the output ay1(t) + b y2(t). This must hold for all values of a, b and x1(t), x2(t); a and b are arbitrary constants. NOTE 2 In practice, the above test for linearity is impractical and a limited check of linearity is performed by measuring the dynamic transfer stiffness for a range of input levels. For a specific preload, if the dynamic transfer stiffness is nominally invariant, the system can be considered linear. In effect, this procedure checks for a propor