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1、BRITISH STANDARD BS 6140-1: 1981 ISO 5344:1980 Test equipment for generating vibration Part 1: Methods of describing characteristics of electrodynamic test equipment for generating vibration ISO title: Electrodynamic test equipment for generating vibration Methods of describing equipment characteris
2、tics UDC 620.178.5:534.1.082.74:621.318.3 Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 05:18:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6140-1:1981 This British Standard, having been prepared under the direction of the Mechanical Engineering Standards Committee, was published under t
3、he authority of the Executive Board and comes into effect on 30 September 1981 BSI 02-2000 The following BSI references relate to the work on this standard: Committee reference MEE/158 Draft for comment 78/72468 DC ISBN 0 580 12262 X Cooperating organizations The Mechanical Engineering Standards Com
4、mittee, under whose direction this British Standard was prepared, consists of representatives from the following: The organizations marked with an asterisk in the above list, together with the following, were directly represented on the Technical Committee entrusted with the preparation of this Brit
5、ish Standard: Associated Offices Technical CommitteeDepartment of the Environment (PSA) Association of Consulting EngineersDepartment of Trade (Marine Division) Association of Hydraulic EquipmentDepartment of Transport ManufacturersElectricity Supply Industry in England and Association of Mining Ele
6、ctrical andWales* Mechanical EngineersEngineering Equipment Users Association* British Compressed Air SocietyFederation of Manufacturers of Construction British Electrical and Allied Manufacturers Equipment and Cranes Association (BEAMA)Health and Safety Executive British Gas CorporationInstitution
7、of Gas Engineers British Gear Manufacturers AssociationInstitution of Mechanical Engineers* British Internal Combustion EngineInstitution of Plant Engineers Manufacturers Association*Institution of Production Engineers British Pump Manufacturers AssociationLloyds Register of Shipping British Steel C
8、orporationLondon Transport Executive British Steel Industry*Ministry of Defence* CbmpeNational Coal Board Chartered Institution of Building ServicesOil Companies Materials Association* Crown Agents for Oversea Governments andProcess Plant Association AdministrationsSociety of Motor Manufacturers and
9、 Traders Department of Industry (MechanicalLimited Engineering)Telecommunication Engineering and Department of Industry (NationalManufacturing Association (TEMA) Engineering Laboratory)*Water-tube Boilermakers Association British Ship Research AssociationNorth East Coast Institution of Engineers Ins
10、titute of Sound and Vibration Researchand Shipbuilders Institution of Electronic and Radio EngineersPower Generation Association (BEAMA) Machine Tool Industry Research AssociationIndividual expert Motor Industry Research Association Amendments issued since publication Amd. No.Date of issueComments L
11、icensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 05:18:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6140-1:1981 BSI 02-2000i Contents Page Cooperating organizationsInside front cover National forewordii 0Introduction1 1Scope and field of application1 2References1 3Symbols1 4Units and quanti
12、ties2 5Definitions2 6Characteristics to be supplied by the manufacturer4 7Electrodynamic vibration generators8 8Power amplifiers16 9Electrodynamic vibration generator and amplifier system20 Annex A Typical arrangement of an electrodynamic vibration generator26 Annex B Methods of measurement or calcu
13、lation of various components of electrodynamic vibration generators29 Figure 1 Curve of maximum apparent power versus frequency3 Figure 2 Total harmonic distortion as a function of apparent power at a given frequency3 Figure 3 Total harmonic distortion as a function of frequency at the rated apparen
14、t power4 Figure 4 Acceleration per unit current in the moving element coil11 Figure 5 Acceleration per unit voltage across the moving element coil terminals12 Figure 6 Apparent random power Pb19 Figure 7 Typical arrangement of an electrodynamic vibration generator with vibrating table26 Figure 8 Typ
15、ical arrangement of an electrodynamic vibration generator with force take-off (exciter)27 Figure 9 Typical arrangement for coupling an electrodynamic vibration generator to an auxiliary table28 Figure 10 Installation diagram30 Table 1 Vibration generator5 Table 2 Power amplifier6 Table 3 Generator/a
16、mplifier system7 Publications referred toInside back cover Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 05:18:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6140-1:1981 ii BSI 02-2000 National foreword This Part of this British Standard has been prepared under the direction of the Mechan
17、ical Engineering Standards Committee and is one of a series of standards concerned with test equipment for generating vibration. It is identical with ISO 5344 “Electrodynamic test equipment for generating vibration Methods of describing equipment characteristics” published in 1980 by the Internation
18、al Organization for Standardization (ISO). It is envisaged that further Parts of this British Standard, to be published in due course, will include one dealing with auxiliary tables for vibration generators. Terminology and conventions. The text of the International Standard has been approved as sui
19、table for publication as a British Standard without deviation. Some terminology and certain conventions are not identical with those used in British Standards; attention is especially drawn to the following. The comma has been used throughout as a decimal marker. In British Standards it is current p
20、ractice to use a full point on the baseline as the decimal marker. Wherever the words “International Standard” appear, referring to this standard, they should be read as “British Standard”. The technical committee has reviewed the provisions of the following International Standards to which referenc
21、e is made in 7.1, 7.2.3 and 9.2.3 of this standard, and has decided that they are acceptable for use in conjunction with this standard. ISO/R 468:1966, which is related to BS 1134 “Method for the assessment of surface texture” Part 1:1972 “Method and instrumentation” and Part 2:1972 “General informa
22、tion and guidance”; ISO 2041:1975, which is related to BS 3015:1976 “Glossary of terms relating to mechanical vibration and shock”. 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. Com
23、pliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references International StandardCorresponding British Standard ISO 3744:1981BS 4196 Sound power levels of noise sources Part 4:1981 Engineering methods for determination of sound power levels for source
24、s in free-field conditions over a reflecting plane (Identical) IEC 268-3:1969BS 5428 Methods for specifying and measuring the characteristics of sound system equipment Part 2:1979 Amplifiers (Technically equivalent) Summary of pages This document comprises a front cover, an inside front cover, pages
25、 i and ii, pages 1 to 32, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 05:18:38 GMT+
26、00:00 2006, Uncontrolled Copy, (c) BSI BS 6140-1:1981 BSI 02-20001 0 Introduction This International Standard concerns the characteristics to be standardized for test equipment used to generate vibration by electrodynamic means and serves as a guide to the selection of such equipment. In the context
27、 of this International Standard, the term “electrodynamic” means that the vibratory force created by the generator results from the interaction of a constant magnetic field and an alternating current in a built-in coil. This International Standard applies to the following: a) electrodynamic vibratio
28、n generators (see clauses 3 to 7, and annexes); b) power amplifiers (see clauses 3, 4, 5, 6 and 8, and annexes); c) vibration generator and associated power amplifiers (see clauses 3 to 9, and annexes). A test equipment system comprises: vibration generators and amplifiers combined as in this Intern
29、ational Standard, and control consoles, auxiliary tables (see ISO 6070) and other test equipment to be standardized later. The division into separate classes, a), b) and c) above, has been made to permit the performance of vibration generators and their associated amplifiers to be predicted from the
30、 characteristics of separate portions of the test equipment. Classes a) and b) are provided primarily to permit a prospective user to calculate the performance of a vibration generator from one manufacturer with a power amplifier from another manufacturer. Class c) may be all that a prospective user
31、 requires if both the vibration generator and the power amplifier are from the same manufacturer. 1 Scope and field of application The test equipment used for the electrodynamic generation of vibration possesses many characteristics which can be evaluated in many very different ways. To permit compa
32、rison of test equipment from different sources, this International Standard establishes the following: a) a list of the characteristics; b) the standard method of obtaining certain characteristics. This International Standard provides three levels of description to be used in describing test equipme
33、nt, as follows: a) minimum level of description; b) medium level of description; c) high level of description. This International Standard gives, for each level of description, a list of the characteristics to be specified by the manufacturer in his tender and in his literature. 2 References ISO/R 4
34、68, Surface roughness. ISO 2041, Vibration and shock Vocabulary. ISO 3744, Acoustics Determination of sound power levels of noise sources Engineering method for free-field conditions over a reflecting plane. IEC Publication 268-3, Sound system equipment Part 3: Sound system amplifiers. 3 Symbols aAc
35、celeration abrms acceleration in random mode bDamping coefficient of the moving element suspension dTotal harmonic distortion (see 5.9) FMaximum sinusoidal force (see 5.2) FbMaximum random force, broad band FoRated sinusoidal force (see 5.3) FobRated random force, broad band (see 5.4) FomtRated sinu
36、soidal force (see 7.2.3) (subscript t represents the various loads) fFrequency fmaxMaximum frequency for which the value of a specified parameter is never less than a specified or rated value of this parameter fminMinimum frequency for which the value of a specified parameter is never less than a sp
37、ecified or rated value of this parameter fmtFirst mechanical resonance frequency of the moving element (subscript t represents the various loads) (see 5.7) fstResonance frequency of the moving element suspension (subscript t represents the various loads) (fs0 is the particular case for no load) (see
38、 5.5) Hi (f)Acceleration per unit current in the moving element coil Hv (f) Acceleration per unit voltage across the moving element coil terminals ICurrent IbAvailable effective current under random conditions IoComplex output current Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 05:18:38 G
39、MT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6140-1:1981 2 BSI 02-2000 4 Units and quantities When the manufacturer or the user gives the values for the parameters required by this International Standard, he should clearly define the units that have been used, and state whether the quantities are gi
40、ven as rms, peak or peak-to-peak values. 5 Definitions This clause defines only some of the terms used in this International Standard. See ISO 2041 for definitions of a general nature. 5.1 force in this International Standard, force is the force developed by an electrodynamic vibration generator whi
41、ch can be delivered to a load mounted on the test table or connected to the force take-off. This force differs from the force generated by currents flowing in the moving element primarily due to the effects of moving element mass, moving element resonances, suspension stiffness, suspension damping,
42、and the limits of vibration travel 5.2 maximum force under sinusoidal conditions, F the upper limit of the force which the vibration generator is capable of delivering at a given frequency and for a specified test load 5.3 rated force under sinusoidal conditions, Fo the minimum value of all the valu
43、es of Fomt which the vibration generator is capable of delivering; expressed in another way, it is the minimum value of the function F for test loads mt 5.4 rated random force, broad band, Fob the minimum value, for any test load, of the random force, broad band. This force corresponds to a spectral
44、 power density of uniform acceleration between lower and upper frequency limits 5.5 mechanical resonance frequency of the moving element suspension, fst this frequency is determined by the effective mass of the moving element and test load and the dynamic stiffness of the moving element suspension 5
45、.6 electrical resonance frequency of the moving element the frequency at which the current in the moving coil is in phase with the voltage, and the electrical impedance is a minimum 5.7 mechanical resonance frequency of the moving element, fmt this frequency is the first mechanical resonance frequen
46、cy of the moving element found above the mechanical resonance frequency of the moving element suspension IsoRated effective current under sinusoidal conditions KDynamic stiffness of the moving element suspension meEffective mass of the moving element mtMasses of test loads (t = 0, t = 1, t = 2, t =
47、3, t = 4) PMaximum apparent sinusoidal power PbApparent random power, broad band PsoRated apparent sinusoidal power (see 5.8) PobRated apparent random power PobcRated apparent peak random power RsoResistive test load UEComplex input voltage UoComplex output voltage VgOverall output noise voltage VoR
48、ated output signal voltage VsoRated sinusoidal voltage sVelocity of moving element ZbGenerator impedance in the random vibration mode ZsoInductive test load iAcceleration/current response fFrequency bandwidth aAcceleration power spectral density FMaximum force power spectral density FoRated force po
49、wer spectral density PPower spectral density for maximum random power PoPower spectral density for rated random power Force or acceleration crest factor Phase shift (phase angle) Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 05:18:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6140-1:1981 BSI 02-20003 5.8 rated apparent power under sinusoidal conditions, Pso the minimum value of curve P (see Figure 1). This curve results from the product of the current and voltage which the amplifier can deliver within the freque