1、AECIA PREN*Z591- 428 95 = LOL23LL 0009529 T70 Edition approved for publication 1995-09-30 AECMA STANDARD NORME AECMA AECMA NORM Comments should be sent within six months C2 Chairman Mr. Pezzetta after the date of publication to AECMA Guliedelle 94 B-1200 BRUXELLES prEN 2591 -428 Edition P 1 Septembe
2、r 1995 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES (AECMA) Guliedelle 94 - 8-1200 BRUXELLES - Tel. (32) 2 775 81 10 - Fax. (32) 2 775 81 11 ICs : Descriptors : Aircraft industry, aircraft equipment, electrical connection equipment, test ENGLISH VERSION Aerospace series Elements of
3、electrical and optical connection Test methods Part 428 : Sinusoidal vibrations with passage of current for crimped terminal lugs Srie arospatiale Luft- und Raumfahrt Mthodes dessais Verbindungselemente Organes de connexion lectrique et optique Partie 428 : Vibrations sinusodales avec passage de cou
4、rant pour cosses serties Elektrische und optische Prfverfahren Teil 428 : Vibration, sinusfrmug bei Stromflu fr gecrimpte Kabelschuhe This “Aerospace Series“ Prestandard has been drawn up under the responsibility of AECMA (The European Association of Aerospace Industries). It is published on green p
5、aper for the needs of AECMA-Members. It has been technically approved by the experts of the concerned Technical Committee folio wing comment by the Member countries. Subsequent to the publication of this Prestandard, the technical content shall not be changed to an extent that interchangeability is
6、affected, ph ysically or functionally, without re-identification of the standard. After examination and signature of the AECMA Standard Checking Centre INPSI and formal agreement of the Official Services of the Member countries it will be submitted as a draft European Standard to CEN (European Commi
7、ttee for Standardization) for formal vote. AECMA PREN+2591- 428 95 W 1012311 0009533 629 Page 3 prEN 2591-428 : 1995 1 Scope This standard specifies a method for determining the ability of crimped terminal lugs to withstand sinusoidal vibrations when a current is passing through them. It shall be us
8、ed together with EN 2591 2 Normative references EN 2591 Aerospace series - Elements of electrical and optical connection - Test methods - General EN 2591-403 Aerospace series - Sinusoidal and random vibrations ) TR 4257 Aerospace series - Elements of electrical and optical connection - Relationship
9、between the numbering systems for parts of EN 2591 2 3 Preparation of specimens The specimens shall be fitted with their normal accessories, wired up in accordance with the technical specification. The following details shall be specified in the technical specification : - number of specimens; - typ
10、e of cable; - installation and wiring of specimens; - initial measurements and requirement. 4 Equipment in accordance with EN 2591 -403. 5 Method 5.1 Initial measurements These shall be carried out in accordance with the technical specification. 5.2 Level The vibration test level shall be given by c
11、ombining five parameters : frequency range, vibration amplitude, duration of the endurance test, ageing temperature and current. 5.2.1 Frequency range 10 Hz to 2 O00 Hz. 5.2.2 Vibration amplitude Below certain frequencies called transition frequencies, amplitudes shall be specified by constant displ
12、acement, whilst above these frequencies amplitudes shall be specified by constant acceleration. The values to be applied are 0,75 mm, 15 gn, unless otherwise specified in the technical specification. 1) Published as AECMA Prestandard EN 2591-D3 at the date of publication of this standard. See 2) Pub
13、lished as AECMA Technical Report at the date of publication of this standard TR 4257 AECMA PREN*257L- 428 75 = LO12311 0009532 565 Page 4 prEN 2591 -428 : 1995 5.2.3 Duration of test The entire frequency range from 10 Hz to 2 O00 Hz and back to 10 Hz shall be run through in 20 min. This cycle shall
14、be carried out 12 times in each of three directions at right angles to each other (.e. 36 times in total), so that the total duration of the test is approximately 12 h. 5.2.4 Ageing current During vibration a current enabling the ageing temperature (maximum temperature sustained by the cable) to be reached in the cable core shall be passed through the sample. The ageing current shall be determined for each type of cable. 5.3 Assembly The assembly shall be specified in the technical specification.
