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1、BRITISH STANDARD AEROSPACE SERIES BS EN 2591-403:1998 Elements of electrical and optical connection Test methods Part 403: Sinusoidal and random vibration The European Standard EN 2591-403:1998 has the status of a British Standard ICS 49.060 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 02 18:
2、03:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 2591-403:1998 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 November 1998 BSI 05-1999 ISBN 0 580 3070
3、9 3 National foreword This British Standard is the English language version of EN 2591-403:1998. The UK participation in its preparation was entrusted by Technical Committee ACE/6, Aerospace avionic, electrical and fibre optic technology, to Subcommittee ACE/6/3, Aerospace connectors, which has the
4、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 promulgate them in the UK
5、. A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “I
6、nternational 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. Compliance wit
7、h 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, pages i and ii, the EN title page, pages 2 to 8 and a back cover. This standard has been updated (see copyright date) and may have had amendm
8、ents incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 02 18:03:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 2591-403:1998 BSI 05-1999i Contents Pa
9、ge National forewordInside front cover Foreword2 Text of EN 2591-4033 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 02 18:03:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 02 18:03:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEA
10、N STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2591-403 August 1998 ICS 49.060 Descriptors: Aircraft industry, aircraft equipment, connecting equipment, test English version Aerospace series Elements of electrical and optical connection Test methods Part 403: Sinusoidal and random vibration Srie aros
11、patiale Organes de connexion lectrique et optique Mthodes dessais Partie 403: Vibrations sinusodales et alatoires Luft- und Raumfahrt Elektrische und optische Verbindungselemente Prfverfahren Teil 403: Sinus- und rauschfrmige Schwingungen This European Standard was approved by CEN on 23 February 199
12、8. 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 national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained o
13、n application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretaria
14、t has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN Europea
15、n Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1998 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 2591-403:1998 E Licensed Co
16、py: sheffieldun sheffieldun, na, Thu Nov 02 18:03:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 2591-403:1998 BSI 05-1999 2 Foreword This European Standard has been prepared by the European Association of Aerospace Manufacturers (AECMA). After inquiries and votes carried out in accordance with th
17、e rules of this Association, this Standard has received the approval of the National Associations and the Official Services of the member countries of AECMA, prior to its presentation to CEN. This European Standard shall be given the status of a national standard, either by publication of an identic
18、al text or by endorsement, at the latest by February 1999, and conflicting national standards shall be withdrawn at the latest by February 1999. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Sta
19、ndard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword2 1Scope3 2Normative references3 3Preparation of specimens3 4Apparatus3 5Me
20、thod4 Figure 1 Sinusoidal vibrations5 Figure 2 Spectral shape6 Figure 3 Random vibrations7 Table 16 Table 27 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 02 18:03:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 2591-403:1998 BSI 05-19993 1 Scope This standard specifies a method of determinin
21、g the ability of elements of connection to withstand sinusoidal or random vibrations of specified severities. It shall be used together with EN 2591. 2 Normative references This European Standard incorporates by dated or undated reference provisions from other publications. These normative reference
22、s are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the late
23、st edition of the publication referred to applies. EN 2591, Aerospace series Elements of electrical and optical connection Test methods General. EN 2591-101, Aerospace series Elements of electrical and optical connection Test methods Part 101: Visual examination. EN 2591-201, Aerospace series Elemen
24、ts of electrical and optical connection Test methods Part 201: Contact resistance Low level. EN 2591-202, Aerospace series Elements of electrical and optical connection Test methods Part 202: Contact resistance at rated current. EN 2591-204, Aerospace series Elements of electrical and optical connec
25、tion Test methods Part 204: Discontinuity of contacts in the microsecond range. EN 2591-408, Aerospace series Elements of electrical and optical connection Test methods Part 408: Mating and unmating forces1). 3 Preparation of specimens 3.1 Specimens shall be prepared according to the technical speci
26、fication. 3.2 Unless specified in the technical specification, the following details shall be stated: mounting method, type of cable and definition of specimen wiring; specimens mated or unmated and fitted with protective covers (if applicable); number of mating and unmating operations (if applicabl
27、e); type of accessories to be fitted on specimens; initial measurements and requirements, (if applicable); fixing points of sensors on specimens (if applicable); test severity: 1) sinusoidal or random vibration curve (method A Figure 1 or method B Figure 2 or Figure 3); 2) temperature (maximum, mini
28、mum and ambient); 3) duration; mating and unmating forces; applicable contact resistance test (EN 2591-201 or EN 2591-202); final measurements (if applicable). 4 Apparatus When the vibration apparatus is loaded with a mass equivalent to that of the specimens, the characteristics required for the tes
29、t installation shall meet the requirements of methods A or B. 4.1 Sinusoidal vibration 4.1.1 Basic motion It shall be sinusoidal and such that the fixing points of the specimens are moving substantially in phase, in straight parallel lines. 4.1.2 Transverse motion The maximum vibration amplitude at
30、the fixing points in any direction perpendicular to the intended direction (including any other motion) shall not exceed 25 % of the specified amplitude. 4.1.3 Distortion The total harmonic factor at the fixing points of the specimens related to the specified basic driving amplitude shall not exceed
31、 25 %. The value distortion rate shall be noted. 4.1.4 Vibration amplitude tolerances The amplitude measured at the control point closest to the fixing points in the required direction shall not exceed the specified value by: 15 % in the frequency range where displacement amplitude is specified; 10
32、% in the frequency range where acceleration amplitude is specified. 4.1.5 Frequency tolerances Measurement of frequency for determination of resonant frequencies shall be carried out with a tolerance of 0,5 % or 0,5 Hz, whichever is the greater. 1) Published as AECMA Prestandard at the date of publi
33、cation of this standard Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 02 18:03:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 2591-403:1998 4 BSI 05-1999 4.1.6 Sweep method The sweep shall be continuous and logarithmic and the sweep rate shall be approximately one octave per minute. For dete
34、rmination of resonant frequencies, the sweep may be temporarily stopped but any dwell time shall be considered in the test duration. 4.2 Random vibration 4.2.1 Power spectral density curves The output of the vibration apparatus shall be presented graphically as power-spectral density in relation to
35、the frequency. The power spectral density values shall be within the following limits: between 40 % and 30 % ( 1,5 dB) of the specified value from lower-specified frequency up to 1 000 Hz; between 100 % and 50 % ( 3 dB) of the specified value from 1 000 Hz up to the upper specified frequency. Filter
36、 bandwidth shall be a maximum of 1/3 octave or preferably shall have a frequency of 25 Hz. 4.2.2 Distribution curve A probability density distribution curve may be determined and compared with a Gaussian distribution curve. This test curve shall not differ from the Gaussian curve by more than 10 % o
37、f the maximum value. 4.2.3 Vibration measurements They shall be carried out on the vibration generator and on the installation test. If specified, measurements on the specimens shall be carried out during the test. 4.2.4 Vibration monitoring The vibration magnitude shall be monitored as near as poss
38、ible to the specimen fixing points to confirm compliance with the specified vibration curve at all measuring points. Acceleration in the transverse direction measured at the specimen fixing points shall be limited to 100 % of the applied vibration. The vibration generator shall produce random excita
39、tion that possesses a Gaussian amplitude distribution. The peak value of acceleration shall be limited to three times the r.m.s. value (three-sigma limit). The specimens shall be vibrated in each of the three axes perpendicular between them, one axis being parallel to the coupling axis. Unless other
40、wise specified measurements to EN 2591-204 (Method B) shall be carried out on contacts and (if applicable) the shielding connection. No discontinuity higher or equal to 1 4s shall be observed. Discontinuities lower than 1 4s are admissible provided their repetition rate does not exceed 1 Hz. 5 Metho
41、d 5.1 Initial measurements (if applicable) They shall be carried out as specified. 5.2 Severity 5.2.1 Sinusoidal vibration (method A) The test severity is given by the combination of four parameters: frequency range, vibration amplitude, test duration and temperature. 5.2.1.1 Frequency range 5 Hz to
42、 3 000 Hz. 5.2.1.2 Vibration amplitude The values are given in Figure 1. Below certain frequencies known as cross-over frequencies, amplitudes are at constant displacement, whilst above these frequencies amplitudes are at constant acceleration. 5.2.1.3 Test duration The entire frequency range of 5 H
43、z to 3 000 Hz and return to 5 Hz shall be swept in 20 min. This cycle shall be performed 12 times in each of three axes so that test duration shall be approximately 12 h. 5.2.2 Random vibration (method B) The test severity is given by a combination of spectral shape, spectral density, duration and t
44、emperature. 5.2.2.1 Spectral shape and density See Figure 2 and Table 1 or Figure 3 and Table 2. Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 02 18:03:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 2591-403:1998 BSI 05-19995 Figure 1 Sinusoidal vibrations Licensed Copy: sheffieldun sheffiel
45、dun, na, Thu Nov 02 18:03:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 2591-403:1998 6 BSI 05-1999 Table 1 Figure 2 Spectral shape (lower noise r.m.s. values) Characteristics LevelPower spectral density Noise r.m.s. value m/s2 A B C D E F G H J K 0,02 0,04 0,06 0,1 0,2 0,3 0,4 0,6 1 1,5 51 72 88
46、 114 161 196 226 278 359 439 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 02 18:03:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 2591-403:1998 BSI 05-19997 Table 2 Figure 3 Random vibrations (higher noise r.m.s. values) Characteristics LevelPower spectral density Noise r.m.s. value m/s2 A
47、B C D E F G H J K 0,02 0,04 0,06 0,1 0,2 0,3 0,4 0,6 1 1,5 58 81 100 129 183 223 259 317 409 501 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 02 18:03:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 2591-403:1998 8 BSI 05-1999 5.2.2.2 Test duration The specimens shall be subjected to the spe
48、cified vibration level for 8 min, 15 min, 1,5 h or 8 h as specified in each of the three axes. 5.3 Final measurements (if applicable) The specimens shall be subjected to the following test sequence: EN 2591-101; EN 2591-408; EN 2591-201 or EN 2591-202. Licensed Copy: sheffieldun sheffieldun, na, Thu
49、 Nov 02 18:03:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI blank Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 02 18:03:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 2591-403:1998 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is i