1、BS EN 4662:2010ICS 17.160; 49.035NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDAerospace series Test specificationfor vibration controlcomponentsThis British Standardwas published under theauthority of the StandardsPolicy and StrategyCommittee on 31 March2010
2、BSI 2010ISBN 978 0 580 69531 5Amendments/corrigenda issued since publicationDate CommentsBS EN 4662:2010National forewordThis British Standard is the UK implementation of EN 4662:2010.The UK participation in its preparation was entrusted to TechnicalCommittee ACE/12, Aerospace fasteners and fastenin
3、g systems.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immuni
4、tyfrom legal obligations.BS EN 4662:2010EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 4662 March 2010 ICS 17.160; 49.035 English Version Aerospace series - Test specification for vibration control components Srie arospatiale - Spcification dessais pour des composants de contrle en vibration L
5、uft- und Raumfahrt - Prfspezifikation fr Bauteile zur Schwingungsminderung This European Standard was approved by CEN on 6 February 2010. 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 nationa
6、l standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any
7、 other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Den
8、mark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALIS
9、ATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 4662:2010: EBS EN 4662:2010EN 4662:2010 (E) 2 Contents Page Foreword 31 Scope 42 Definit
10、ion and symbols .42.1 Coordinate system.42.2 Symbols 43 Test set up 74 Static stiffness .84.1 Test parameters .84.2 Stiffness evaluation .84.3 Parasitic stiffness 95 Dynamic stiffness . 105.1 Parameters 105.2 Stiffness evaluation 10BS EN 4662:2010EN 4662:2010 (E) 3 Foreword This document (EN 4662:20
11、10) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN). After enquiries and votes carried out in accordance with the rules of this Association, this Standard has received the approval of the National Associations and the Official Services of
12、the member countries of ASD, prior to its presentation to CEN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by September 2010, and conflicting national standards shall be withdrawn at the latest b
13、y September 2010. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national stan
14、dards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
15、Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 4662:2010EN 4662:2010 (E) 4 1 Scope This standard specifies the procedure and the parameter for testing static and dynamic stiffness of vibration control components (e.g. shock mounts with bushes)
16、. This standard applies to vibration control components all installed for aircraft applications. It may be applied when referred to in the product standard or in a design specification. 2 Definition and symbols For the purposes of this document, the following definition and symbols apply. 2.1 Coordi
17、nate system The functional requirements shall be defined in a Cartesian coordinate system. The directions for translation and rotation shall be defined in the specifications of the relevant product standards. 2.2 Symbols 2.2.1 Static stiffness Due to the material damping vibration control components
18、 can have a hysteresis load versus displacement curve as shown exemplary in Figure 1.BS EN 4662:2010EN 4662:2010 (E) 5 Key FpuUpper load FplLower load SpuUpper displacement SplLower displacement F1Load value 1 F2Load value 2 F5Load value 5 F6Load value 6 S1Displacement value 1 S2 Displacement value
19、2 S5Displacement value 5 S6Displacement value 6 Figure 1 Load and displacement symbols for translation direction The symbols and parameters for the translation directions can be analogy adapted to the rotational data (see Table 1). BS EN 4662:2010EN 4662:2010 (E) 6 Table 1 Torque and angle symbols f
20、or rotation direction Symbols for Translation direction Rotation direction FpuMpuUpper torque FplMplLower torque SpupuUpper angle SplplLower angle F1M1Torque value 1 F2 2Torque value 2 F5M5Torque value 5 F6 6Torque value 6 S11Angle value 1 S22Angle value 2 S55Angle value 5 S66Angle value 6 Further s
21、ymbols are defined in Table 2. Table 2 General symbols for static test Symbols Static test FpreStatic constant load MpreStatic constant torque SpreStatic constant displacement preStatic constant angle N Number of load cycles V Test speed C1/2Secant stiffness (see Figure 1) C5/6Secant stiffness (see
22、Figure 1) C1-6Resulting stiffness CkCorrection stiffness CstatResulting static stiffness T Environmental test temperature 2.2.2 Dynamic stiffness An exemplary curve for dynamic stiffness and loss angle is shown in Figure 2. BS EN 4662:2010EN 4662:2010 (E) 7 Key 1 Loss angle 2 Dynamic stiffness f Fre
23、quency fmax. Limit test frequency CdynDynamic stiffness dynLoss angle f1Frequency value 1 Cdyn-1Stiffness value 1 dyn-1Loss angle value 1 Figure 2 General symbols for dynamic test Further symbols are defined in Table 3. Table 3 General symbols for dynamic test Symbols Dynamic testFpreStatic constant
24、 load A Amplitude T Environmental test temperature 3 Test set up The test set up shall be designed and manufactured ready to install and measure the specimens due to the specified stiffness directions. The test device shall reproduce the real aircraft installation as exact as possible and needed. If
25、 necessary surrounding original aircraft parts has to be integrated in the test set up. The test set up shall be as rigid as possible and support the maximum test loads without significant deformation (specimen and original aircraft parts excluded) or failure. BS EN 4662:2010EN 4662:2010 (E) 8 For t
26、he measure of the dynamic values the test set up shall be resonance free at minimum factor 2 over the maximum test frequency. The test set up including type of testing machine shall be in accordance with the specifications of the relevant product standards and documented by pictures and drawings. 4
27、Static stiffness 4.1 Test parameters See Table 4 Table 4 Parameter setting Control type Default parameters Requirements pre-load cycle Requirements test cycle Measurement data Force FpreIn accordance with the specifications of the relevant product standards In accordance with the specifications of t
28、he relevant product standards Load versus displacement Sample rate 100 FplFuuN V Torque MpreTorque versus angle Sample rate 100 MplMuuN V Displacement SpreLoad versus displacement Sample rate 100 SplSuuN V Angle preTorque versus angle Sample rate 100 pluuN V NOTE Temperature T in accordance with the
29、 specifications of the relevant product standards. 4.2 Stiffness evaluation See Table 5. BS EN 4662:2010EN 4662:2010 (E) 9 Table 5 Measurement values Control type Default parameters Evaluation data Requirements Force F1S1Parameters and evaluation data in accordance with the specifications of the rel
30、evant product standards Nominal values and tolerances for stiffness Cstatin accordance with the specifications of the relevant product standards F2 2F5S5F6 6Torque M11M22M55M66Displacement S1F1S2 2S5F5S6 6Angle 1M12M2 5M5 6M6 The formulae to calculate the stiffness are: 12122/1SSFFC= 65656/5SSFFC= 2
31、6/52/161CCC+=kstatCCC =61where Ck is the parasitic or correction stiffness as defined in 4.3. 4.3 Parasitic stiffness Before testing the specimen the correction factor for the test set up shall be determined. This parasitic stiffness depends on the test machine itself and on the test set up. BS EN 4
32、662:2010EN 4662:2010 (E) 10 The correction factor shall be measured by substitution of the specimen including the original aircraft parts with a rigid dummy. The same test parameters shall be applied as for the test cycle (see Table 4) and the stiffness Ckshall be calculated analogue to C1-6. 5 Dyna
33、mic stiffness 5.1 Parameters See Table 6. Table 6 Parameter setting Default parameters Measurement data Requirements test cycle Fpre fmax. A Dynamic stiffness versus frequency Sample rate 100 In accordance with the specifications of the relevant product standards Loss angle versus frequency Sample r
34、ate 100 NOTE Temperature T in accordance with the specifications of the relevant product standards 5.2 Stiffness evaluation See Table 7. Table 7 Parameter setting Default parameters Measurement data Requirements test cycle fdynCdynIn accordance with the specifications of the relevant product standar
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