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1、BRITISH STANDARD BS EN ISO 10846-2:1999 Acoustics and vibration Laboratory measurement of vibro-acoustic transfer properties of resilient elements Part 2: Dynamic stiffness of elastic supports for translatory motion Direct method The European Standard EN ISO 10846-2:1998 has the status of a British
2、Standard ICS 17.140.01 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 04:19:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 10846-2:1999 This British Standard, having been prepared under the direction of the Health and Environment Sector Committee, was published under the authority of th
3、e Standards Committee and comes into effect on 15 February 1999 BSI 05-1999 ISBN 0 580 30761 1 National foreword This British Standard is the English language version of EN ISO 10846-2:1998. It is identical with ISO 10846-2:1997. The UK participation in its preparation was entrusted by Technical Com
4、mittee EH/1, Acoustics, to Subcommittee EH/1/4, Machinery noise, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monito
5、r related international and European developments and promulgate them in the UK. A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references Attention is drawn to the fact that CEN and CENELEC standards normally include an annex which lists
6、normative references to international publications with their corresponding European publications. The British Standards which implement these international or European publications may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”,
7、 or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confe
8、r immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN ISO title page, page 2, the ISO title page, pages ii to iv, pages 1 to 12, an inside back cover and a back cover. This standard has been updated (see copyright dat
9、e) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 04:19:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 10846-2:1999
10、 BSI 05-1999i Contents Page National forewordInside front cover Foreword2 Forewordii Text of ISO 10846-21 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 04:19:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 04:19:31 GMT+00:00 2006
11、, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 10846-2 November 1998 ICS 17.140.01 Descriptors: See ISO document English version Acoustics and vibration Laboratory measurement of vibro-acoustic transfer properties of resilient elements Part 2: Dynamic stiffness
12、 of elastic supports for translatory motion Direct method (ISO 10846-2:1997) Acoustique et vibrations Mesurage en laboratoire des proprits de transfert vibro-acoustique des lments lastiques Partie 2: Raideur dynamique en translation des supports lastiques Mthode directe (ISO 10846-2:1997) Akustik un
13、d Schwingungstechnik Laborverfahren zur Messung der vibro-akustischen Transfereigenschaften elastischer Elemente Teil 2: Bestimmung der dynamischen Transfersteifigkeit elastischer Sttzelemente fr translatorische Schwingungen Direktes Verfahren (ISO 10846-2:1997) This European Standard was approved b
14、y CEN on 8 November 1998. CEN 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 such national stan
15、dards may be obtained on application to the Central Secretariat or to any CEN 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 CEN member into its own language and notified to
16、 the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and Unit
17、ed Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1998 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO
18、10846-2:1998 E Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 04:19:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 10846-2:1998 BSI 05-1999 2 Foreword The text of the International Standard from Technical Committee ISO/TC 43 “Acoustics” and ISO/TC 108 “Mechanical vibration and shock” o
19、f the International Organization for Standardization (ISO) has been taken over as an European Standard by Technical Committee CEN/TC 211 “Acoustics”, the secretariat of which is held by DS. This European Standard shall be given the status of a national standard, either by publication of an identical
20、 text or by endorsement, at the latest by May 1999, and conflicting national standards shall be withdrawn at the latest by May 1999. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austr
21、ia, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of the International Standard ISO 10846-2:1997 has been approved by CEN as a Euro
22、pean Standard without any modification. NOTENormative references to International Standards are listed in Annex ZA (normative). Contents Page Foreword2 Introduction1 1Scope1 2Normative references2 3Definitions2 4Principle3 5Apparatus4 6Criteria for adequacy of the test arrangement5 7Test procedures7
23、 8Evaluation of test results9 9Information to be recorded10 10Test report11 Annex A (informative) Static load-deflection curve13 Annex B (informative) Bibliography13 Annex ZA (normative) Normative references to international publications with their relevant European publications13 Figure 1 Example o
24、f elastic supports with parallel flanges1 Figure 2 Example of laboratory test rig for measuring the dynamic transfer stiffness for normal translations5 Figure 3 Example of laboratory test rig for measuring the dynamic transfer stiffness for transverse translation6 Figure 4 Forces and acceleration on
25、 output side of the isolator6 Figure 5 Example of the format of the graph for presenting one-third-octave-band levels of the dynamic transfer stiffness with an example of scale values11 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 04:19:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI License
26、d Copy: sheffieldun sheffieldun, na, Sat Nov 18 04:19:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 10846-2:1998 ii BSI 05-1999 Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing I
27、nternational 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 liaison
28、 with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication a
29、s an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 10846-2 was prepared jointly by Technical Committees ISO/TC 43, Acoustics, Subcommittee SC 1, Noise, and ISO/TC 108, Mechanical vibration and shock. Annex A and Annex B of t
30、his part of ISO 10846 are for information only. Descriptors: Acoustics, vibration, resilient devices, vibration isolators, tests, determination, mechanical properties, dynamic stiffness, acoustic measurements. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 04:19:31 GMT+00:00 2006, Uncontroll
31、ed Copy, (c) BSI EN ISO 10846-2:1998 BSI 05-19991 Introduction Passive vibration isolators of various kinds are used to reduce the transmission of vibrations. Examples are automobile engine mounts, elastic supports for buildings, elastic mounts and flexible shaft couplings for shipboard machinery an
32、d small isolators in household appliances. This part of ISO 10846 specifies a direct method for measuring the dynamic transfer stiffness function of linear elastic supports. This includes elastic supports with non-linear static load-deflection characteristics as long as the elements show an approxim
33、ate linearity for vibrational behaviour for a given 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 a indire
34、ct method and on a driving point method. ISO 10846-1 provides guidance for the selection of the appropriate part of the series. The laboratory conditions described in this part of ISO 10846 include the application of static preload. The results of the direct method are useful for isolators which are
35、 used to prevent low-frequency vibration problems and to attenuate structure-borne sound. The method is not sufficiently appropriate to characterize completely isolators which are used to attenuate shock excursions. 1 Scope This part of ISO 10846 specifies a method for determining the dynamic transf
36、er stiffness for translations of elastic 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 applicable to elastic supports with parallel flanges (see Figure 1). NO
37、TE 1Vibration isolators which are the subject of this part of ISO 10846 are those which are used to reduce: a) the transmission of audiofrequency vibrations (structure-borne sound, 20 Hz to 20 kHz) to a structure which may, for example, radiate unwanted fluidborne sound (airborne, waterborne or othe
38、r); 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 of any size when vibration is too severe. NOTE 2In practice the size of the available test rig(s) may restrict the use of very small or very lar
39、ge elastic supports. NOTE 3When an elastic support has no parallel flanges, an auxiliary fixture should be included as part of the test element to arrange for parallel flanges. NOTE 4Portions of continuous supports of strips and mats are used as test samples in this method. Whether or not the portio
40、n 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 method covers the frequency range from 1 Hz up to a frequency f1, wh
41、ich is usually determined by the test rig. The data obtained according to the method specified in this part of ISO 10846 can be used for: product information provided by manufacturers and to suppliers; information during product development; quality control; calculation of the transfer of vibrationa
42、l energy through isolators. Figure 1 Example of elastic supports with parallel flanges Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 04:19:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 10846-2:1998 2 BSI 05-1999 2 Normative references The following standards contain provisions which,
43、 through reference in this text, constitute provisions of this part of ISO 10846. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of ISO 10846 are encouraged to investigate the possibility of applying
44、the most recent editions of the standards indicated below. Members of ISO maintain registers of currently valid International Standards. ISO 266:, Acoustics Preferred frequencies1). ISO 2041:1990, Vibration and shock Vocabulary. ISO 10846-1:1997, Acoustics and vibration Laboratory measurement of vib
45、ro-acoustic transfer properties of resilient elements Part 1: Principles and guidelines. ISO 5347-3:1993, Methods for the calibration of vibration and shock pick-ups Part 3: Secondary vibration calibration. ISO 5348:1987, Mechanical vibration and shock Mechanical mounting of accelerometers. ISO 7626
46、-1:1986, Vibration and shock Experimental determination of mechanical mobility Part 1: Basic definitions and transducers. ISO 7626-2:1990, Vibration and shock Experimental determination of mechanical mobility Part 2: Measurements using single-point translational excitation with an attached vibration
47、 exciter. 3 Definitions For the purposes of this part of ISO 10846, the definitions given in ISO 2041 and the following apply. 3.1 resilient element (see vibration isolator) 3.2 vibration isolator isolator designed to attenuate the transmission of vibration in frequency range ISO 2041:1990, 2.110 3.
48、3 elastic support vibration isolator suitable for supporting part of the mass of a machine, a building or another type of structure 3.4 blocking force Fb dynamic force on the output side of a vibration isolator which results in a zero displacement output 3.5 dynamic driving point stiffness k1,1 freq
49、uency-dependent complex ratio of the force on the input side of a vibration isolator with the output side blocked to the complex displacement on the input side during simple harmonic vibration NOTE 1k1,1 may depend on static preload, temperature and other conditions. NOTE 2At low frequencies k1,1 is solely determined by elastic and dissipative forces. At higher frequencies inertial forces in the resilient element play a role as well. 3.6 dynamic transfer stiffness k2,1 frequency-dependent comp