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BSI PD IEC/TR 62131-2:2011

BSI PD IEC/TR 62131-2:2011

$167.15

Environmental conditions. Vibration and shock of electrotechnical equipment – Equipment transported in fixed wing jet aircraft

Published By Publication Date Number of Pages
BSI 2011 44
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IEC/TR 62131-2, which is a technical report, reviews the available dynamic data relating to electrotechnical equipment transported in fixed wing jet transport aircraft. The intent is that from all the available data an environmental description will be generated and compared to that set out in IEC 60721.

For each of the sources identified the quality of the data is reviewed and checked for self consistency. The process used to undertake this check of data quality and that used to intrinsically categorize the various data sources is set out in IEC/TR 62131-1.

This technical report primarily addresses data extracted from a number of different sources for which reasonable confidence exist as to their quality and validity. The report also presents data for which the quality and validity cannot realistically be reviewed. These data are included to facilitate validation of information from other sources. The report clearly indicates when it utilizes information in this latter category.

This technical report addresses data from several different transport aircraft1. Although one of these aircraft is no longer used commercially, data from it are included to facilitate validation of information from other sources.

Relatively little of the data reviewed has been made available in electronic form. To permit comparison, a quantity of the original (non-electronic) data have been manually digitized in this technical report.

PDF Catalog

PDF Pages PDF Title
4 CONTENTS
6 FOREWORD
8 1 Scope
2 Normative references
9 3 Data source and quality
3.1 Lockheed Tristar KC Mk 1
3.2 BAe VC10 K
10 3.3 Boeing 747 Combi (freight and passengers)
12 3.4 Supplementary data
4 Intra data source comparison
4.1 General remark
4.2 Lockheed Tristar KC Mk 1
13 4.3 BAe VC10 K
14 4.4 Boeing 747 Combi (freight and passengers)
5 Inter data source comparison
15 6 Environmental description
6.1 Lockheed Tristar KC Mk 1
6.2 BAe VC10 K
6.3 Boeing 747 Combi (freight and passengers)
7 Supplementary data
7.1 General remark
7.2 McDonnell Douglas DC8 Cargo
16 7.3 Lockheed C5A (Galaxy), Lockheed C-141 (Starlifter) and Boeing NC-135 (707)
8 Comparison with IEC 60721
17 9 Recommendations
19 Figures

Figure 1 – Schematic of Tristar aircraft
Tables

Table 1 – Tristar flight conditions and measured r.m.s. values
20 Figure 2 – Tristar noise measurements
Figure 3 – Tristar vibration measurements – Take-off, power and roll
21 Figure 4 – Tristar vibration measurements – Low altitude climb
Figure 5 – Tristar vibration measurements – High altitude cruise
22 Figure 6 – Tristar vibration measurements – Landing
Figure 7 – Tristar vibration measurements – Low altitude decent
23 Figure 8 – Tristar vibration measurements – C of G take-off/climb
Figure 9 – Tristar vibration measurements – Forward take-off/climb
24 Figure 10 – Tristar vibration measurements – Centre of gravity cruise
Figure 11 – Tristar vibration measurements – Forward cruise
25 Figure 12 – Tristar vibration measurements – Centre of gravity landing
Figure 13 – Tristar vibration measurements – Forward landing
26 Figure 14 – Tristar vibration measurements – Cruise environment
Figure 15 – Tristar vibration measurements – Take-off/landing environment
27 Figure 16 – Schematic of VC10 aircraft
Table 2 – VC10 flight conditions
Table 2a – VC10 measurement locations
28 Table 3 – Overall g r.m.s. (3,25 Hz to 2 000 Hz) for VC10 airframe/container
Table 4 – Overall g r.m.s. (3,25 Hz to 399 Hz) for VC 10 container measurements
29 Figure 17 – VC10 vibration measurements – Cruise
Figure 18 – VC10 vibration measurements – Maximum airframe severity
30 Figure 19 – VC10 vibration measurement – Forward container during reverse thrust
Figure 20 – VC10 vibration measurement – Rear container during reverse thrust
31 Figure 21 – VC10 measurements – Overlaid worst case spectra
32 Table 5 – Summary of 747 air transport data
Table 6 – Summary of 747 acceleration levels (g) expectedto be exceeded for 1 % of the time of the trial
33 Figure 22 – Vibration measurements on a pallet in a Boeing 747 Combi aircraft (transducer V1)
Figure 23 – Vibration measurements on a pallet in a Boeing 747 Combi aircraft (Transducer V2)
34 Figure 24 – DC8 vibration measurements reverse thrust
Table 7 – Summary of DC8 air data
35 Figure 25 – DC8 vibration measurements acceleration and take-off
Figure 26 – DC8 vibration measurements cruise
36 Figure 27 – Foley representation of environment for NC-135, C-141 and C-5A aircraft
Figure 28 – Foley landing shock environment
37 Figure 29 – Foley test severity for take-off/landing
Table 3 – Foley test severity for take-off/landing – Sine components
38 Figure 30 – Foley test severity for cruise
Table 10 – Foley test severity for cruise – Sine components
39 Figure 31 – IEC 60721-3-2:1997 – Stationary vibration random
Figure 32 – IEC 60721-3-2:1997 – Non-stationary vibration including shock
40 Figure 33 – Test severities – ASTM D 4728-91
Figure 34 – Test severities – Mil Std 810 issue F and G
41 Figure 35 – Test severities – AECTP 400 (Editions 2 and 3)
Figure 36 – Test severity – Def Stan 00-35, issues 3 and 4
42 Bibliography

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