{"id":421909,"date":"2024-10-20T06:38:40","date_gmt":"2024-10-20T06:38:40","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bsi-pd-iec-tr-62131-72020-2\/"},"modified":"2024-10-26T12:26:01","modified_gmt":"2024-10-26T12:26:01","slug":"bsi-pd-iec-tr-62131-72020-2","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bsi-pd-iec-tr-62131-72020-2\/","title":{"rendered":"BSI PD IEC TR 62131-7:2020"},"content":{"rendered":"

This part of IEC 62131, reviews the available dynamic data relating to the transportation of electrotechnical equipment by rotorcraft (helicopters). The intent is that from all the available data an environmental description will be generated and compared to that set out in IEC 60721 (all parts) [16] 1<\/sup>.<\/p>\n

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 [21].<\/p>\n

This document primarily addresses data extracted from a number of different sources for which reasonable confidence exist in its quality and validity. This document also reviews some data for which the quality and validity cannot realistically be verified. These data are included to facilitate validation of information from other sources. This document clearly indicates when utilizing information in this latter category.<\/p>\n

This document addresses data from a number of data gathering exercises. The quantity and quality of data in these exercises varies considerably as does the range of conditions encompassed.<\/p>\n

Not all of the data reviewed were made available in electronic form. To permit comparison to be made, in this assessment, a quantity of the original (non-electronic) data has been manually digitized.<\/p>\n

PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
2<\/td>\nundefined <\/td>\n<\/tr>\n
4<\/td>\nCONTENTS <\/td>\n<\/tr>\n
7<\/td>\nFOREWORD <\/td>\n<\/tr>\n
9<\/td>\n1 Scope
2 Normative references
3 Terms and definitions <\/td>\n<\/tr>\n
10<\/td>\n4 Data source and quality
4.1 Vibration of Boeing CH-47 rotorcraft <\/td>\n<\/tr>\n
11<\/td>\n4.2 Set down of underslung cargo from a Boeing CH-47 rotorcraft <\/td>\n<\/tr>\n
12<\/td>\n4.3 Supplementary data <\/td>\n<\/tr>\n
15<\/td>\n5 Intra data source comparison
5.1 General
5.2 Vibration of Boeing CH-47 rotorcraft
5.3 Set down of underslung cargo from a Boeing CH-47 rotorcraft <\/td>\n<\/tr>\n
16<\/td>\n5.4 Supplementary data
6 Inter data source comparison
7 Environmental description
7.1 Physical sources producing mechanical vibrations <\/td>\n<\/tr>\n
17<\/td>\nTable 1 \u2013 Typical structural dynamic excitation frequencies and their source <\/td>\n<\/tr>\n
18<\/td>\n7.2 Environmental characteristics and severities <\/td>\n<\/tr>\n
19<\/td>\n7.3 Derived test severities <\/td>\n<\/tr>\n
20<\/td>\n8 Comparison with IEC 60721 (all parts) [16] <\/td>\n<\/tr>\n
23<\/td>\n9 Recommendations <\/td>\n<\/tr>\n
24<\/td>\nFigures
Figure 1 \u2013 Typical vibration spectra for CH-47 rotorcraft during straight and level flight at 160 kn [1]
Figure 2 \u2013 Typical vibration spectra for CH-47 rotorcraft during hover [1] <\/td>\n<\/tr>\n
25<\/td>\nFigure 3 \u2013 Typical vibration spectra for CH-47 rotorcraft during transition to hover [1]
Figure 4 \u2013 Typical vibration spectra for CH-47 rotorcraft during autorotation [1] <\/td>\n<\/tr>\n
26<\/td>\nFigure 5 \u2013 Comparison of CH-47 vibration overall RMS for different flight conditions [1] <\/td>\n<\/tr>\n
27<\/td>\nFigure 6 \u2013 Comparison of CH-47 vibration RMS severities at rotor shaft frequency (r) for different flight conditions [1] <\/td>\n<\/tr>\n
28<\/td>\nFigure 7 \u2013 Comparison of CH\u201147 vibration RMS severities at rotor blade passing frequency (nr) for different flight conditions [1] <\/td>\n<\/tr>\n
29<\/td>\nFigure 8 \u2013 Comparison of CH\u201147 vibration RMS severities at second rotor blade passing frequency (2nr) for different flight conditions [1] <\/td>\n<\/tr>\n
30<\/td>\nFigure 9 \u2013 Comparison of CH\u201147 vibration RMS severities at third rotor blade passing frequency (3nr) for different flight conditions [1] <\/td>\n<\/tr>\n
31<\/td>\nFigure 10 \u2013 Comparison of CH\u201147 vibration RMS severities at fourth rotor blade passing frequency (4nr) for different flight conditions [1] <\/td>\n<\/tr>\n
32<\/td>\nFigure 11 \u2013 Comparison of CH\u201147 vibration RMS severities across cargo bay floor during hover [1]
Figure 12 \u2013 Comparison of CH\u201147 vibration RMS severities across cargo bay floor during transition to hover manoeuvre [1] <\/td>\n<\/tr>\n
33<\/td>\nFigure 13 \u2013 Comparison of CH\u201147 vibration RMS severities across cargo bay floor during a transition to autorotation manoeuvre [1]
Figure 14 \u2013 Comparison of CH\u201147 vibration RMS severities across cargo bay floor during straight and level flight [1] <\/td>\n<\/tr>\n
34<\/td>\nFigure 15 \u2013 CH\u201147 rotorcraft ISO container set down shock severities [2]
Figure 16 \u2013 Relative amplitude variations with airspeed for the Lynx rotorcraft [3] <\/td>\n<\/tr>\n
35<\/td>\nFigure 17 \u2013 Relative amplitude variations with airspeed for the Seaking rotorcraft [3]
Figure 18 \u2013 Relative amplitude variations with airspeed for the Chinook rotorcraft [3] <\/td>\n<\/tr>\n
36<\/td>\nFigure 19 \u2013 Airframe to airframe relative amplitude variations for the Lynx rotorcraft [3] <\/td>\n<\/tr>\n
37<\/td>\nFigure 20 \u2013 Comparison of fleet vibration statistics [5] <\/td>\n<\/tr>\n
38<\/td>\nFigure 21 \u2013 Super Frelon rotorcraft measurements for X axis [6]
Figure 22 \u2013 Super Frelon rotorcraft measurements for Y axis [6] <\/td>\n<\/tr>\n
39<\/td>\nFigure 23 \u2013 Super Frelon rotorcraft measurements for Z axis [6]
Figure 24 \u2013 Vibration test severity derived for the CH\u201147 rotorcraft using the approach of Mil Std 810 [9] <\/td>\n<\/tr>\n
40<\/td>\nFigure 25 \u2013 Vibration test severity derived for the transportation of equipment in CH\u201147 rotorcraft using the approach of STANAG 4370 AECTP 400 Method 401 Annex D [10]
Figure 26 \u2013 Vibration test severity for equipment carried as underslung loads STANAG 4370 AECTP 400 Method 401 Annex D [10] <\/td>\n<\/tr>\n
41<\/td>\nFigure 27 \u2013 Rotorcraft specific vibration test severities for Chinook (CH\u201147) from Def Stan 00\u201135 [5]
Figure 28 \u2013 Rotorcraft specific vibration test severities for Merlin from Def Stan 00\u201135 [5] <\/td>\n<\/tr>\n
42<\/td>\nFigure 29 \u2013 Rotorcraft specific vibration test severities for Lynx\/Wildcat from Def Stan 00\u201135 [5]
Figure 30 \u2013 Vibration test severities for underslung loads from Def Stan 00\u201135 [5] <\/td>\n<\/tr>\n
43<\/td>\nFigure 31 \u2013 Rotorcraft specific vibration test severities for CH\u201147 from RTCA\/DO\u2011160 [11] and EUROCAE\/ED\u201114 [12]
Figure 32 \u2013 IEC 60721\u20113\u20112:1997 [17] \u2013 Stationary vibration random severities <\/td>\n<\/tr>\n
44<\/td>\nFigure 33 \u2013 IEC TR 60721\u20114\u20112:2001 [18]\u2013 Stationary vibration random severities
Figure 34 \u2013 IEC 60721\u20113\u20112:1997 [17] \u2013 Stationary vibration sinusoidal severities <\/td>\n<\/tr>\n
45<\/td>\nFigure 35 \u2013 IEC TR 60721\u20114\u20112:2001 [18] \u2013 Stationary vibration sinusoidal severities
Figure 36 \u2013 IEC 60721\u20113\u20112:1997 [17] \u2013 Shock severities <\/td>\n<\/tr>\n
46<\/td>\nFigure 37 \u2013 IEC TR 60721\u20114\u20112:2001 [18] \u2013 Shock severities for IEC 60068\u20112\u201129:1987 [20] test procedure
Figure 38 \u2013 IEC TR 60721\u20114\u20112:2001 [18] \u2013 Shock severities for IEC 60068\u20112\u201127 [19] test procedure <\/td>\n<\/tr>\n
47<\/td>\nFigure 39 \u2013 Comparison of CH\u201147 rotorcraft vibrations [1] with IEC 60721\u20113\u20112:1997 [17]
Figure 40 \u2013 Comparison of Super Frelon rotorcraft X axis vibrations [6]with IEC 60721\u20113\u20112:1997 [17] <\/td>\n<\/tr>\n
48<\/td>\nFigure 41 \u2013 Comparison of Super Frelon rotorcraft Y axis vibrations [6]with IEC 60721\u20113\u20112:1997 [17]
Figure 42 \u2013 Comparison of Super Frelon rotorcraft Z axis vibrations [6] with IEC 60721\u20113\u20112:1997 [17] <\/td>\n<\/tr>\n
49<\/td>\nFigure 43 \u2013 Comparison of Mil Std 810 vibration test severity [9] with IEC 60721\u20113\u20112:1997 [17]
Figure 44 \u2013 Comparison of AECTP 400 vibration test severity [10] with IEC 60721\u20113\u20112:1997 [17] <\/td>\n<\/tr>\n
50<\/td>\nFigure 45 \u2013 Comparison of Def Stan 00\u201135 vibration test severity [5]with IEC 60721\u20113\u20112:1997 [17]
Figure 46 \u2013 Comparison of DO160 vibration test severity [11]with IEC 60721\u20113\u20112:1997 [17] <\/td>\n<\/tr>\n
51<\/td>\nFigure 47 \u2013 Comparison of underslung load vibration test severities [5] and [10]with IEC 60721\u20113\u20112:1997 [17]
Figure 48 \u2013 Comparison of CH\u201147 rotorcraft set down shock severities [2] with IEC 60721\u00ad3\u00ad2:1997 [17] <\/td>\n<\/tr>\n
52<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Environmental conditions. Vibration and shock of electrotechnical equipment – Transportation by rotary wing aircraft<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2020<\/td>\n54<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":421916,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2641],"product_tag":[],"class_list":{"0":"post-421909","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-bsi","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/421909","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/421916"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=421909"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=421909"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=421909"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}