1、BRITISH STANDARDBS 6140-2: 1982ISO 6070:1981Incorporating corrigendum no. 1 Test equipment for generating vibration Part 2: Methods of describing g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3
2、g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58characteristics of auxiliary tables for test equipment for generating vibrationISO title: Auxiliary tables for vibration generators Methods of describing equipment characteristicsICS 19.060BS 6140-2:1982Cooperating organizationsThe MechanthifollAssociate
3、d OfAsAssociationManAssociationMechBrBrBrThis British Standard, having been prepared under the direction of the Mechanical Engineering Standards Committee, was published under the authority of the Board of BSI and comes into effect on 29 October 1982 BSI 2007The following BSI references relate to th
4、e work on this standard:Committee reference MEE/158Draft for comment 80/72507 DCISBN 978 0 580 59194 5The 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 British Standard
5、:of Mining Electrical and Energy Industries Councilanical Engineers Engineering Equipment Users Association*itish Compressed Air Society Federation of Manufacturers of Constructionitish Constructional Steelwork Association Equipment and Cranesitish Electrical and Allied Manufacturers Health and Safe
6、ty Executive*Association (BEAMA) Institution of Gas EngineersBritish Gas Corporation Institution of Mechanical Engineers*British Gear Manufacturers Association Institution of Plant EngineersBritish Internal Combustion Engine Institution of Production EngineersManufacturers Association* Lloyds Regist
7、er of ShippingBritish Pump Manufacturers Association London Transport ExecutiveBritish Steel Corporation* Machine Tool Industry Research Association*British Steel Industry Ministry of Defence*British Valve Manufacturers Association Ltd. National Coal BoardChartered Institution of Building Services O
8、il Companies Materials Association*Crown Agents for Oversea Governments and Process Plant AssociationAdministrations Society of Motor Manufacturers and TradersDepartment of Industry (Mechanical LimitedEngineering) Telecommunication Engineering andDepartment of Industry (National Engineering Manufact
9、uring Association (TEMA)Laboratory)* Water-tube Boilermakers AssociationDepartment of the Environment (PSA)British Ship Research Association Power Generation Association (BEAMA)Institute of Sound and Vibration Research Society of British Aerospace CompaniesInstitution of Electronic and Radio Enginee
10、rs LimitedMotor Industry Research Association Society of Environmental EngineersNorth East Coast Institution of Engineers and Coopted memberShipbuildersAmendments issued since publicationAmd. No. Date of issue Comments17141Corrigendum No. 1 29 June 2007 See national forewordical Engineering Standard
11、s Committee, under whose direction s British Standard was prepared, consists of representatives from the owing: fices Technical Committee Department of Trade (Marine Division)sociation of Consulting Engineers Department of Transportof Hydraulic Equipment Electricity Supply Industry in England andufa
12、cturers Wales*BS 6140-2:1982 BSI 2007ContentsPageCooperating organizations Inside front coverNational foreword ii1Scope 12 Field of application 13Symbols 14Units 25 Definitions 26Test loads mt57 Characteristics to be supplied by the manufacturer 68 Measurement of common dynamic characteristics 119Op
13、erating instructions 11Figure 1 Example of coupling of an auxiliary table to single vibration generator Typical arrangement 3Figure 2 Moving table reference axis system 4Table 1 Characteristics shared by all table types 7Table 2 Special characteristics for flat spring tables 8Table 3 Special charact
14、eristics for oil film or air cushion tables 9Table 4 Special characteristics for mechanical slide tables 9Table 5 Special characteristics for ball, roller or needle bearing tables 9Table 6 Special characteristics for hydraulic slide tables 9Table 7 Special characteristics for hydrostatic bearing tab
15、les 10Table 8 Special characteristics for magnetic bearing tables 10Table 9 Special characteristics for dry bearing tables with hydrostatic compensation 10iBS 6140-2:1982iiconcerned with test equipment for generating vibration. It is identical with ISO 6070:1981 “Auxiliary tables for vibration gener
16、ators Methods of describing equipment characteristics” published by the International Organization for Standardization (ISO).Part 1 of this British Standard was published by BSI. It is the UK implementation of 5344:1980 “Test equipment for generating vibration” Part 1 “Methods of describing characte
17、ristics of electrodynamic test equipment for generating vibration”, incorporating corrigendum September 2006. A further Part of this standard, dealing with hydraulic test equipment for generating vibration, is in course of preparation.The start and finished of text introduced or altered by corrigend
18、um is indicated in the text by tags . Text altered by ISO corrigendum 1 is indicated in the text by .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.
19、 In British Standards it is current practice to use a full point on the baseline as a decimal marker.Wherever the words “International Standard” appear, referring to this standard, they should be read as “British Standard”.This publication does not purport to include all the necessary provisions of
20、a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.National forewordThis Part of this British Standard has been prepared under the direction of the Mechanical Engineering Standards Committee and is one of a s
21、eries of standards BSI 2007BS 6140-2:19821 ScopeThis International Standard defines the content of the information flow to be established between manufacturers and users of auxiliary tables with a view to working out related specifications and possibly to comparing in an objective way, the character
22、istics advertised by the various manufacturers of auxiliary tables and associated guidance systems.2 Field of applicationThis International Standard applies to auxiliary tables associated with one or several vibration generators working along axes which are parallel to the longitudinal axis of the t
23、able.1)The tables dealt with in this International Standard are of the following types: flat spring tables; oil film or air cushion tables; mechanical slide tables; ball, roller or needle bearing tables; hydraulic slide tables; hydrostatic bearing tables; magnetic bearing tables; dry bearing tables
24、with hydrostatic compensation;or a combination of two or more of the above types.This International Standard provides three levels of description to be used in describing test equipment, as follows:a) minimum level of description;b) medium level of description;c) high level of description.This Inter
25、national Standard gives for each level of description a list of the characteristics to be described by the manufacturer either in his tender or in his literature.3 SymbolsCLimiting pitching torqueCLimiting rolling torqueCLimiting yawing torqued Total harmonic distortion of accelerationFaForce measur
26、ed in direction z to overcome static (stiction) friction (possibly for various test loads and various positions of the moving table along longitudinal z axis)FgForce measured in direction z to overcome dynamic frictionFsStatic load limitFx Fy FzLimiting forces which can be withstood by the moving au
27、xiliary table along the three axesf FrequencyfmaxMaximum operational frequencyfminMinimum operational frequencyIx Iy IzMoments of inertia of the moving table with respect to axes parallel to the reference axes through the centre of gravityKx Ky KzTranslational stiffness of guidance system along the
28、three axesK K KRotational stiffness of guidance about the three axesm Total mass of moving table including moving components of guidance systemmtTest load (index t = 0, 1, 2, 3, 4 and 5, see clause 6)VzRated rms velocity along z axisXc Yc ZcCoordinates of centre of test table surface (see 5.2, Figur
29、e 2)XG YG ZGCoordinates of moving table centre of gravity Pitch angle (rotation about y axis) Roll angle (rotation about z axis) Yaw angle (rotation about x axis) BSI 2007 11) Auxiliary tables with several degrees of freedom are not covered by this International Standard which applies specifically t
30、o the more common types of auxiliary tables where the surface of the table is horizontal; however, if suitable means for counteracting the force of gravity are provided, the table may have any orientation.BS 6140-2:19824 UnitsWhen the manufacturer, or user, specifies values for the parameters requir
31、ed in this International Standard, the units to be used shall be clearly defined and it shall be stated, where applicable, whether quantities are expressed as rms, peak or peak-to-peak values.5 DefinitionsAn auxiliary table is a mechanical system intended for transmitting vibration generated by one
32、or more vibration generators to equipment under test.The table is fitted with its own guidance system which shall be compatible with the guidance system of the vibration generator(s).The auxiliary table is composed of: the moving table including the test table and the coupling (or couplings) to the
33、vibration generator (or generators); the guidance system; levelling blocks.5.1 Types of auxiliary tables5.1.1 flat spring tablesthe connection between the moving table and the fixed part of the guidance system is achieved by metallic flat springs, the stiffness of which is low in the longitudinal di
34、rection and high in the other five degrees of freedom5.1.2 oil or air cushion tablesthe moving table lies on a face plate, the two opposite faces being separated by an oil or grease film or by an air cushion to reduce the friction coefficient. (It is not possible to define the degree of stiffness of
35、 the connection between the moving table and the fixed part of the guidance system for this type of table)5.1.3 mechanical slide tablesthe connection between the fixed part of the guidance system and the moving table is ensured by a system of slides and connecting links. The stiffness is very low in
36、 the longitudinal direction. The stiffness for the other degrees of freedom is very high except for any clearances which may exist5.1.4 ball, roller or needle bearing tablesthe principle is the same as for mechanical slide tables but friction reduction is obtained by ball, roller or needle bearing5.
37、1.5 hydraulic slide tablesthe principle is the same as for mechanical slide tables but lubrication is achieved under pressure. Stiffness can be defined for very small transverse linear or rotational displacements5.1.6 hydrostatic bearing tablesthe connection between the table and the fixed parts of
38、the guidance system is achieved by fluid pressure. This ensures self-centering of the systemconnecting stiffness is negligible in the longitudinal direction. Stiffness corresponding to the other degrees of freedom can be defined2 BSI 2007BS 6140-2:19825.1.7 magnetic bearing tablesthe connection betw
39、een the table and the fixed part of the guidance system is achieved by a magnetic field, the gradient of which determines the stiffness. There is no physical contact between the moving surfaces. Stiffness and friction are negligible in the longitudinal direction. Stiffness corresponding to the other
40、 degrees of freedom can be defined5.1.8 dry bearing tables with hydrostatic compensationself-alignment and clearance compensation are ensured by fluid pressure on the outside of the contact surfacethe stiffness is very low in the longitudinal direction. Stiffness corresponding to the other degrees o
41、f freedom can be defined5.2 Axis systems5.2.1 moving table reference axis systemthe characteristic dimensions of the moving table are defined with respect to the axes constituting its Figure 1 Example of coupling of an auxiliary table to single vibration generator Typical arrangement BSI 2007 3the c
42、onnection between the table and the fixed part of the guidance system is achieved by contact of two materials with low-friction propertiesreference axis system (see Figure 2)BS 6140-2:1982OZ is the longitudinal axis (parallel to the direction of the motion induced by the vibration generator and dire
43、cted from the loading surface of the moving table to the free end)OX is the normal axis (perpendicular to the moving table plane and directed towards the equipment under test).OY is the lateral axis (constitutes a direct rectangular trihedral angle with the above-mentioned axes).the origin O of the
44、reference axis system is the intersection of the moving table loading surface with the horizontal axis of the vibration generatorin the case where the table is coupled to several vibration generators, one is selected to define the reference axis system for the moving tablemotions are defined with re
45、spect to a fixed axis system ox, oy, oz, the axes of which are parallel to the axes of the moving table reference axis system5.2.2 other moving table reference axis systemsother axis systems whose axes are parallel to the table reference axis system and where the origin is according to requirement (
46、for example, centre of gravity, centre of mounting plane, etc.) can be defined for special purposes5.3 Characteristics5.3.1 effective travelthe limits between which the moving table normally operates and beyond which performances are no longer guaranteed by the manufacturer5.3.2 rated frequency rang
47、ethe limits fminand fmaxbetween which the moving table normally operates and below and above which performances are no longer guaranteed by the manufacturer5.3.3 rated rms velocity Vzthe rated rms value of the velocity along the z-axis is the maximum value of the velocity for which the table can ope
48、rate continuously over the rated frequency range with the selected test load (pure mass)5.3.4 static load (limit) Fsthe maximum static load which can be withstood by the table without damage5.3.5 limiting axial forces Fx, Fy, FzFigure 2 Moving table reference axis system4 BSI 2007the limiting axial
49、forces, static as well as dynamic, which can be exerted on the auxiliary table along the three axes without damageBS 6140-2:19825.3.6 limiting pitching torque Cthe limiting torque in pitch due to static and dynamic forces which can be exerted on the table without damage5.3.7 limiting rolling torque Cthe limiting torque in roll due to static and dynamic forces which can be exerted on the table without damage5.3.8 limiting yawing torque Cthe limiting torque in yaw due to static and dynamic forces which c
