IEC TR 62131-8:2022

IEC TR 62131-8 ®
Edition 1.0 2022-07
TECHNICAL
REPORT
colour
inside
Environmental conditions – Vibration and shock of electrotechnical equipment –
Part 8: Transportation by ship
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IEC TR 62131-8 ®
Edition 1.0 2022-07
TECHNICAL
REPORT
colour
inside
Environmental conditions – Vibration and shock of electrotechnical equipment

–
Part 8: Transportation by ship

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 19.040 ISBN 978-2-8322-3970-4

– 2 – IEC TR 62131-8:2022 © IEC 2022
CONTENTS
FOREWORD . 5
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Data source and quality . 8
4.1 General . 8
4.2 NAV vibration measurements . 8
4.3 RIB vibration measurements . 9
4.4 Supplementary data . 11
5 Intra data source comparison . 13
5.1 General . 13
5.2 NAV vibration measurements . 13
5.3 RIB vibration measurements . 14
5.4 Supplementary data . 15
6 Inter data source comparison . 16
7 Environmental description . 16
7.1 Conditions causing the environment . 16
7.2 Environmental characteristics . 17
7.3 Test types . 17
8 Comparison with the IEC 60721 series . 18
9 Recommendations . 21
Bibliography . 54

Figure 1 – RMAS Arrochar specification and layout [3] . 23
Figure 2 – RMAS arrochar hold vibration measurement locations [3] . 24
Figure 3 – RMAS Arrochar hold vibration levels for different sea states [3] . 26
Figure 4 – Envelope of vibration levels in forward and aft holds [3] . 26
Figure 5 – RIB speed from GPS obtained during measurement events [4] . 27
Figure 6 – RIB transducer locations [4] . 27
Figure 7 – RIB vibration severities forward deck – Fore-aft [4] . 30
Figure 8 – RIB vibration severities forward deck – Lateral [4] . 31
Figure 9 – RIB vibration severities forward deck – Vertical [4] . 31
Figure 10 – RIB vibration severities centre port deck – Fore-aft [4] . 32
Figure 11 – RIB vibration severities centre port deck – Lateral [4] . 32
Figure 12 – RIB vibration severities centre port deck – Vertical [4] . 33
Figure 13 – RIB vibration severities rear deck – Fore-aft [4] . 33
Figure 14 – RIB vibration severities rear deck – Vertical [4] . 34
Figure 15 – RIB vibration severities starboard gearbox [4] . 34
Figure 16 – RIB vibration amplitude probability density – Forward deck [4] . 35
Figure 17 – Vibration RIB amplitude probability density – Aft (rear deck) deck [4] . 35
Figure 18 – RIB vibration time history – Forward deck [4] . 36
Figure 19 – Naval supply tanker at 20 kn [5] . 36
Figure 20 – Train ferry at 20 kn [5] . 37

Figure 21 – MIL STD 810 [6] random vibration test severity for shipborne equipment . 37
Figure 22 – MIL STD 810 [6] sinusoidal vibration test severity for shipborne equipment . 38
Figure 23 – DEF STAN 00-035 [7] test severity for transportation of equipment by sea . 38
Figure 24 – DEF STAN 00-035 [7] test severity for equipment installed in large ships . 39
Figure 25 – DEF STAN 00-035 [7] test severity for equipment installed in smaller ships
– Aft locations . 39
Figure 26 – DEF STAN 00-035 [7] test severity for equipment installed in small ships –
Mid and forward locations . 40
Figure 27 – DEF STAN 00-035 [7] information – Typical acceleration power spectral
density at aft region of naval frigate . 40
Figure 28 – DEF STAN 00-035 [7] information – Overall vibration RMS variations with
power demand . 41
Figure 29 – DEF STAN 00-035 [7] information – Overall vibration RMS variations with
manoeuvre condition . 41
Figure 30 – EXACT DK 1–237 [8] composite vibration spectrum of engine room
measurements from five different ship types . 42
Figure 31 – American Bureau of Shipping recommendations for vibration severities
[10] . 42
Figure 32 – ISO 20283 [11] recommendations for passenger comfort. 43
Figure 33 – IEC 60945 [14] severity for ship installed equipment . 43
Figure 34 – Comparison of random severities . 44
Figure 35 – Comparison of sinusoidal severities . 44
Figure 36 – IEC 60721-3-2 [28] – Stationary vibration random severities . 45
Figure 37 – IEC TR 60721-4-2 [30] – Stationary vibration random severities . 45
Figure 38 – IEC 60721-3-2 [28] – Stationary vibration sinusoidal severities . 46
Figure 39 – IEC TR 60721-4-2 [30] – Stationary vibration sinusoidal severities . 46
Figure 40 – IEC 60721-3-2 [28] – Shock severities . 47
Figure 41 – IEC TR 60721-4-2 [30] – Shock severities for IEC 60068-2-27 [32] test
procedure . 47
Figure 42 – IEC TR 60721-4-2 [30] – Shock severities for IEC 60068-2-29 [33] test
procedure . 48
Figure 43 – IEC 60721-3-6 [13] stationary vibration sinusoidal severities . 48
Figure 44 – IEC 60721-3-6 [13] shock severities . 49
Figure 45 – Comparison of NAV vibrations [3] with IEC 60721-3-2 [28] . 49
Figure 46 – Comparison of RIB vibrations [4] with IEC 60721-3-2 [28] . 50
Figure 47 – Comparison of RIB vibrations [4] (less rear floor measurements) with
IEC 60721-3-2 [28] . 50
Figure 48 – Comparison of GAM-EG-13 vibrations [5] with IEC 60721-3-2 [28] . 51
Figure 49 – Comparison of EXACT DK 1–237 composite vibration spectrum of engine
room measurements (from [8]) with IEC 60721-3-2 [28] . 51
Figure 50 – Comparison of MIL STD 810 [6] and DEF STAN 00-035 [7] ship
transportation severities with IEC 60721-3-2 [28] . 52
Figure 51 – Comparison of sinusoidal installed equipment severities with IEC 60721-3-
2 [28] . 52
Figure 52 – Comparison of Sinusoidal Installed Equipment Severities with IEC 60721-
3-6 [13] . 53

– 4 – IEC TR 62131-8:2022 © IEC 2022
Table 1 – RMAS Arrochar hold low frequency (up to 10 Hz) accelerations levels [3] . 24
Table 2 – RMAS Arrochar hold vibration levels for different sea states [3] . 25
Table 3 – Definition of sea states . 25
Table 4 – RIB measurement events [4] . 28
Table 5 – RIB statistics of vibration measurements from sea segment [4] . 28
Table 6 – RIB statistics of vibration measurements riverine events – RMS [4] . 29
Table 7 – RIB statistics of vibration measurements riverine events – Maximum and
minimum [4] . 29

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ENVIRONMENTAL CONDITIONS – VIBRATION AND
SHOCK OF ELECTROTECHNICAL EQUIPMENT –

Part 8: Transportation by ship

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The o
...