BS-ISO-15086-2-2000.pdf
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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS ISO 15086-2:2000 ICS 1
2、7.140.20; 23.100.01 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Hydraulic fluid power Determination of fluid-borne noise characteristics of components and systems Part 2: Measurement of speed of sound in a fluid in a pipe Licensed Copy: sheffieldun sheffieldun, na, Sun Nov
3、 26 04:21:57 GMT+00:00 2006, Uncontrolled Copy, (c) BSI This British Standard, having been prepared under the direction of the Engineering Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 April 2000 BSI 04-2000 ISBN 0 580 34654 4 BS ISO 15086
4、-2:2000 Amendments issued since publication Amd. No.DateComments National foreword This British Standard reproduces verbatim ISO 15086-2:2000 and implements it as the UK national standard. The UK participation in its preparation was entrusted to Technical Committee MCE/18, Fluid power systems and co
5、mponents, 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; monitor related international and European developments and p
6、romulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in this document may be found in the BSI Standards Catalogue under the section en
7、titled International Standards Correspondence Index, 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. Complianc
8、e with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii to v, a blank page, pages 1 to 27 and a back cover. The BSI copyright notice displayed in this document ind
9、icates when the document was last issued. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 04:21:57 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Reference number ISO 15086-2:2000(E) INTERNATIONAL STANDARD ISO 15086-2 First edition 2000-02-01 Hydraulic fluid power Determination of fluid-borne noi
10、se characteristics of components and systems Part 2: Measurement of speed of sound in a fluid in a pipe Transmissions hydrauliques valuation des caractristiques du bruit liquidien des composants et systmes Partie 2: Mesurage de la vitesse du son mis dans un fluide dans une tuyauterie Licensed Copy:
11、sheffieldun sheffieldun, na, Sun Nov 26 04:21:57 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 15086-2:2000(E) ii? Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 04:21:57 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 15086-2:2000(E) ?iii Contents?Page Foreword.iv Introduction.v 1?Scope 1 2
12、?Normative references1 3?Terms and definitions .1 4?Symbols and subscripts .2 5?Instrumentation3 6?Hydraulic noise generator.4 7?Test conditions 5 8?Test rig5 9?Test procedure for Method 19 10?Test procedure for Method 210 11?Test report11 12?Identification statement (Reference to this part of ISO 1
13、5086) 12 Annex A (normative) Errors and classes of measurement of mean value13 Annex B (normative) Errors and classes of dynamic measurement14 Annex C (normative) Data reduction algorithms15 Annex D (informative) Example of speed of sound calculation in MATLAB language using three pressure transduce
14、rs in a pipe (Method 1).21 Annex E (informative) Example of speed of sound calculation in MATLAB language using two pressure transducers in a closed-end pipe (Method 2).25 Bibliography27 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 04:21:57 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 15
15、086-2:2000(E) iv? Foreword ISO (the International Organization for Standardization) 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 sub
16、ject 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 with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (I
17、EC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an Intern
18、ational 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 part of ISO 15086 may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Int
19、ernational Standard ISO 15086-2 was prepared by Technical Committee ISO/TC 131,Fluid power systems, Subcommittee SC 8,Product testing. ISO 15086 consists of the following parts, under the general titleHydraulic fluid power Determination of fluid borne noise characteristics of components and systems:
20、 ?Part 1: Introduction ?Part 2: Measurement of the speed of sound in a fluid in a pipe Annexes A, B and C form a normative part of this part of ISO 15086. Annexes D and E are for information only Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 04:21:57 GMT+00:00 2006, Uncontrolled Copy, (c) B
21、SI ISO 15086-2:2000(E) ?v Introduction In hydraulic fluid power systems, power is transmitted and controlled through a liquid under pressure within an enclosed circuit. During the process of converting mechanical power into hydraulic fluid power, flow and pressure fluctuations and structure-borne vi
22、brations are generated. Hydro-acoustical characteristics of hydraulic components can be measured with acceptable accuracy if the speed of sound in the fluid is precisely known. The measurement technique for determining the speed of sound in a pipe, as described in this part of ISO 15086, is based up
23、on the application of plane wave transmission line theory to the analysis of pressure fluctuations in rigid pipes 1. Two different measurement approaches are presented, namely the use of: ?three pressure transducers in a pipe, ?acoustic antiresonance in a closed-end pipe system. The three-pressure-t
24、ransducer method should be used at any time when the speed of sound is to be measured under the effective working conditions in a system. The antiresonance method should be used to produce a table of speed-of-sound data as a function of mean pressure and temperature for a particular fluid. Licensed
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