BS ISO 21289-2008 Mechanical vibration and shock - Parameters to be specified for the acquisition of vibration data《机械振动和冲击 振动数据的采集用指定参数》.pdf

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1、BRITISH STANDARDBS ISO 21289:2008Mechanical vibration and shock Parameters to be specified for the acquisition of vibration dataICS 17.160g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3

2、g38g50g51g60g53g44g42g43g55g3g47g36g58BS ISO 21289:2008This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 May 2008 BSI 2008ISBN 978 0 580 56228 0National forewordThis British Standard is the UK implementation of ISO 21289:2008.The UK particip

3、ation in its preparation was entrusted by Technical Committee GME/21, Mechanical vibration, shock and condition monitoring, to Subcommittee GME/21/2, Vibration and shock measuring instruments and testing equipment.A list of organizations represented on this committee can be obtained on request to it

4、s secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments/corrigenda issued since publicationDate CommentsINTERNATI

5、ONALSTANDARDISO21289First edition2008-03-01Reference numberISO 21289:2008(E)Mechanical vibration and shock Parameters to be specified for the acquisition of vibration dataVibrations et chocs mcaniques Paramtres spcifier pour lacquisition de donnes vibratoiresBS ISO 21289:2008ii iiiContents Page1 Sco

6、pe 12 Normative references 13 Terms and definitions 14 Abbreviated terms . 15 Parameters to be specified . 16 Vibration test reporting . 7Bibliography . 12BS ISO 21289:2008ivForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies(ISO me

7、mber bodies). The work of preparing International Standards is normally carried out through ISOtechnical committees. Each member body interested in a subject for which a technical committee has beenestablished has the right to be represented on that committee. International organizations, government

8、al andnon-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the InternationalElectrotechnical Commission (IEC) on all matters of electrotechnical standardization.International Standards are drafted in accordance with the rules given in the ISO/IEC Directive

9、s, Part 2.The main task of technical committees is to prepare International Standards. Draft International Standardsadopted by the technical committees are circulated to the member bodies for voting. Publication as anInternational Standard requires approval by at least 75 % of the member bodies cast

10、ing a vote.Attention is drawn to the possibility that some of the elements of this document may be the subject of patentrights. ISO shall not be held responsible for identifying any or all such patent rights.ISO 21289 was prepared by Technical Committee ISO/TC 108, Mechanical vibration, shock and co

11、nditionmonitoring.BS ISO 21289:2008vIntroductionUse of this International Standard is recommended to minimize errors and ambiguities in vibrationmeasurement due to inadequate or confusing definition of essential parameters. The specified parametersprovide information to enable a measurement to be co

12、nducted and data to be provided, assuming that properpractices and all applicable sub-specifications have been followed. Proper use of this International Standard willimprove the quality of databases for vibration condition monitoring and assessment of machines and structures.It will also facilitate

13、 improved comparison of vibration test data conducted by different organizations, usingdifferent methods, or over long periods of time.BS ISO 21289:2008blank1Mechanical vibration and shock Parameters to be specified for the acquisition of vibration data1ScopeThis International Standard identifies a

14、set of parameters to be specified, as applicable, for vibrationmeasurements, analysis, reporting and archiving. It is intended for use in the testing of structures, machines,vehicles, sensitive equipment and other dynamic systems.This International Standard applies to measurements made by modern dat

15、a acquisition systems, includingdigital signal processors, using readily available commercial instrumentation. It can be applied to a variety ofcommon vibration measurement types, including time history, spectrum and frequency-response functionmeasurements.2 Normative referencesThe following referen

16、ced documents are indispensable for the application of this document. For datedreferences, only the edition cited applies. For undated references, the latest edition of the referenced document(including any amendments) applies.ISO 2041, Mechanical vibration, shock and condition monitoring Vocabulary

17、ISO 18431-2, Mechanical vibration and shock Signal processing Part 2: Time domain windows for FourierTransform analysis3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 2041 apply.4 Abbreviated termsASCII, American standard code for information intercha

18、ngeUFF, universal file formatEU, engineering unit5 Parameters to be specified5.1 General parameters5.1.1 Concerned partiesThe organizations or individuals involved in the vibration testing, and their roles and responsibilities, shall beidentified.EXAMPLE Concerned parties may include the individuals

19、 and/or organizations that request, require, conduct, witness,review and/or certify the vibration test and/or the resulting data.BS ISO 21289:200825.1.2 Test objectivesA statement of the test objectives shall be supplied.5.1.3 Test objectThe object under test shall be defined and described with suff

20、icient detail to enable later identification of theobject. The test object may be a structure, machine, vehicle, sensitive equipment item, or other dynamicmechanical system. In the case of a series of tests of related subsystems, each subsystem shall be defined anddistinguished from other related su

21、bsystems. If the test object is to be tested prior to, and following,modification(s), this shall be indicated as varying test conditions as indicated in 5.1.8. To facilitate digital datastorage and for filenames, etc., the test object and/or subsystems shall be assigned a name or code todistinguish

22、them from other test objects and subsystems.5.1.4 Location of testThe location or locations of the test shall be specified, to include geographic location, as well as specific testsite.EXAMPLE The test location may include the country, city, province, or other geographical description as well as the

23、 testlaboratory, test range, or site location of field testing.5.1.5 Date(s) of testThe test date(s) shall be specified. This shall include year, month, day and time of day of all test events.5.1.6 Value to be measuredThe value to be measured and the corresponding EU shall be specified for each meas

24、urement conductedduring the test. The EU shall be an SI unit. The method of recording and reporting the value shall also bespecified.EXAMPLE 1 The value to be measured may be acceleration, velocity, strain, force, or any other physical quantitydescribing the severity of vibration, including the rati

25、o, sum or other arithmetic combination of physical quantities such asmobility. The value to be measured may also be a frequency of interest such as a resonance frequency.EXAMPLE 2 Various methods of recording and reporting measurement values are possible, including amplitude, peakvalue, average valu

26、e, root-mean-square value and level.5.1.7 Boundary conditionsThe boundary conditions of the test, describing the relationship of the test object to its physical surroundings,shall be specified. If applicable, additional data describing the boundary conditions, such as mounted naturalfrequency or att

27、achment impedance, shall be specified.EXAMPLE Typical boundary conditions include: in situ, in which the test object is situated in its normal or usual surroundings; resiliently supported, in which the test object is supported by resilient mountings to dynamically isolate the test objectfrom its sur

28、roundings and to approximate free boundary conditions; rigidly supported, in which the test object is attached to a bed plate or other stiff, massive object to approximate a fixedboundary; fixtured, in which the test object is attached to a specially designed test structure or apparatus that is inte

29、nded tosimulate an in situ condition in the laboratory or other controlled test site other than its normal surroundings.BS ISO 21289:200835.1.8 Test and environmental conditionsFor each measurement series, the test object may be subjected to varying test conditions in order tocharacterize the vibrat

30、ion response under these different conditions. For each test condition, a writtendescription of the condition shall be supplied, including quantification by secondary, non-vibrationmeasurements where appropriate. An alphanumeric code should be generated for each test condition, as amodifier to be ad

31、ded to the test object code defined in 5.1.3. In certain cases, measurements may be madeduring changing conditions, for which the starting condition, ending condition and condition program should bespecified.EXAMPLE The test object may be tested under varying environmental factors (temperatures, pre

32、ssures, etc.), operatingconditions (rotational speeds, controlled excitation signals, throttle conditions), and/or before and after events (damage,cycling, ageing, balancing or treatments such as painting or lubrication).5.1.9 Measurement locations on the objectEach measurement shall be assigned a s

33、patial location on the test object. This location shall be defined by itsrelative distance from a reference location on the test object, by distance from the origin of a defined co-ordinatesystem for the test object, by diagram or by a combination of indicators such that no ambiguity can result. For

34、the case of measurements that cannot be described by a single point in space, such as measurement fromfilm-type sensors, a description of the location and area of coverage is required. A unique, unambiguousalphanumeric code distinguishing each location should be devised to abbreviate the description

35、 of each locationfor use in tables, data storage filenames, etc.NOTE Measurement locations may be chosen to be consistent with standard databases such as discussed inISO 13373-1:2002, Annex D.5.1.10 Measurement degree of freedom and frame of referenceEach measurement location shall be assigned a deg

36、ree of freedom in a frame of reference. Each spatiallocation may have up to six degrees of freedom, namely three mutually orthogonal translation degrees offreedom and three mutually orthogonal rotational degrees of freedom. For each degree of freedom, the frame ofreference, defining the meaning of p

37、ositive and negative magnitude, shall be specified. It is preferable to relatethe degrees of freedom and polarity to a global co-ordinate system consistent with the co-ordinate system usedto define the measurement locations; however, in some cases, local co-ordinate systems may be preferable.NOTE Me

38、asurement degrees of freedom and frame of reference may be chosen to be consistent with standard databasessuch as discussed in ISO 13373-1:2002, Annex D.5.1.11 Test documentation requirementsRequirements for test documentation shall be specified.EXAMPLE Test documentation may include a test plan, no

39、tification of test, final test report, and any other requireddocumentation.5.1.12 Applicable test standardsApplicable test standards governing the vibration test shall be specified.5.2 Test equipment parameters5.2.1 Data acquisition systemA list identifying components of the data acquisition system

40、used to collect the vibration data shall be specified.The list shall include manufacturer and model number of all data acquisition equipment. Serial number anddates of calibration shall also be provided.BS ISO 21289:20084EXAMPLE Data acquisition components may include equipment such as digital signa

41、l analysers, signal conditioners,preamplifiers, recording system and filters.5.2.2 TransducersA list of transducers used to collect the vibration data shall be specified. The list shall include transducer type,manufacturer, model number, attachment method, serial number, and date of calibration. Man

42、ufacturersspecification sheets shall also be provided if applicable.NOTE Manufacturers specification sheets typically contain information such as size, mass, accuracy and repeatability,linearity, sensitivity, frequency range, cross-axis sensitivity, initial calibration method and date of calibration

43、, which may beimportant factors in transducer selection and application.5.2.3 Vibration excitationThe vibration excitation shall be specified. This shall include whether the excitation is due to self-inducedvibration or from a vibration generator system. If provided by a vibration generator system,

44、the systemmanufacturer, model number, serial number, and date of calibration shall be provided. Other specifications shallbe provided as applicable.EXAMPLE Specifications may include type of vibration generator system (electrodynamic, mechanical direct-drive,hydraulic, unbalanced mass, piezoelectric

45、, impact hammer or other), force output, displacement, linearity, size, mass andattachment method.5.2.4 Other equipment not related to vibration measurementsA list of other equipment required to conduct the vibration test, but not related to the vibration measurement,shall be made. The list shall co

46、ntain manufacturer and model number of all equipment. If applicable, serialnumbers and dates of calibration shall be provided. Any special requirements for the equipment shall bespecified.EXAMPLE Other equipment may include equipment required to provide control of test conditions, for the acquisitio

47、n ofnon-vibration for quantification of test conditions or to allow proper operation or control of the test object.5.3 Data acquisition and processing parameters5.3.1 Data productsThe data products, describing the data to be collected, stored, plotted, or arranged, shall be specified.EXAMPLE The dat

48、a products may include time history, spectrum, frequency response function, coherence function orother types, including specially designed data products unique to the measurement being specified.NOTE 1 Data products are the result of applying signal processing methods to vibration data. In some case

49、s, real-timesignal processing methods are applied to measured data as they are collected, resulting in data products from the vibrationtest. In other cases, vibration data are recorded and post-processed to provide data products after testing has beencompleted. In the second case, greater flexibility is achieved, since data can be reprocessed using different parameters ifrequired.NOTE 2 See ISO 18431-1 for additional standards applicable to signal processing parameters for vibration te