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GB/T 42284.3-2022 (GB/T42284.3-2022)

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GB/T 42284.3-2022
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.040.10
CCS T 36
Road vehicles - Environmental conditions and testing for
electrical and electronic equipment for drive system of
electric propulsion vehicles - Part 3: Mechanical loads
(ISO 19453-3:2018, MOD)
ISSUED ON: DECEMBER 30, 2022
IMPLEMENTED ON: JULY 01, 2023
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
Introduction ... 6
1 Scope ... 8
2 Normative references ... 8
3 Terms and definitions ... 9
4 Tests and requirements ... 9
4.1 Vibration ... 9
4.2 Mechanical shock ... 20
4.3 Free fall ... 21
4.4 Surface strength/scratch and abrasion resistance ... 22
4.5 Gravel bombardment ... 22
5 Code letters for mechanical loads ... 23
Annex A (Informative) Guidelines for the development of test profiles for vibration
tests ... 25
A.1 Scope ... 25
A.2 General ... 25
A.3 Average control method ... 27
A.4 Method for determining the vibration profile and test duration on/in powertrain ... 28
A.5 Method for determining the vibration profile and test duration on body ... 37
A.6 The explanation for Basquin model ... 44
A.7 Measurement data of number of cycles ... 47
Annex B (Informative) Recommended mechanical requirements for equipment
depending on the mounting location ... 52
Bibliography ... 54
Foreword
This document was drafted in accordance with the rules provided in GB/T 1.1-2020
Directives for standardization - Part 1: Rules for the structure and drafting of
standardizing documents.
This document is Part 3 of GB/T 42284 Road vehicles - Environmental conditions and
testing for electrical and electronic equipment for drive system of electric propulsion
vehicles. The following parts have been issued for GB/T 42284:
-- Part 1: General;
-- Part 3: Mechanical loads;
-- Part 4: Climatic loads;
-- Part 5: Chemical loads.
This document adopts ISO 19453-3:2018 Road vehicles - Environmental conditions
and testing for electrical and electronic equipment for drive system of electric
propulsion vehicles - Part 3: Mechanical loads by modification.
Compared with ISO 19453-3:2018, this document makes the following structural
adjustments:
-- Delete Clause 6 of ISO 19453-3:2018.
The technical differences – between this document and ISO 19453-3:2018 – and the
reasons are as follows:
-- Remove the ISO and IEC database addresses for standardized maintenance terms,
since the terms involved in this document have nothing to do with the ISO and
IEC databases for standardized maintenance terms;
-- Add ISO 20567-1:2017 to the normative references (see 4.5.2);
-- Replace IEC 60068-2-27 (see 4.2.1.2) with the normative reference GB/T 2423.5,
between which the degree of consistency is identical, to adapt to the technical
conditions in China and improve operability;
-- Replace IEC 60068-2-31 (see 4.3.2) with the normative reference GB/T 2423.7,
between which the degree of consistency is identical, to adapt to the technical
conditions in China and improve operability;
-- Replace IEC 60068-2-14 (see 4.1.1) with the normative reference GB/T 2423.22,
between which the degree of consistency is identical, to adapt to the technical
conditions in China and improve operability;
-- Replace IEC 60068-2-64 (see 4.1.1, 4.1.2) with the normative reference GB/T
2423.56, between which the degree of consistency is identical, to adapt to the
technical conditions in China and improve operability;
-- Replace IEC 60068-2-80 (see 4.1.2) with the normative reference GB/T 2423.58,
between which the degree of consistency is identical, to adapt to the technical
conditions in China and improve operability;
-- Replace ISO 16750-1 (see Clause 3) with the normative reference GB/T 28046.1;
the degree of consistency between the two documents is modified, to adapt to the
technical conditions in China and improve operability;
-- Replace ISO 19453-1 (see Clause 3) with the normative reference GB/T 42284.1,
between which the degree of consistency is modified, to adapt to the technical
conditions in China and improve operability;
-- Replace ISO 19453-4 (see 4.1.1) with the normative reference GB/T 42284.4,
between which the degree of consistency is modified, to adapt to the technical
conditions in China and improve operability;
-- Add a test method for gravel bombardment (see 4.5.2).
This document also makes the following editorial modifications:
-- Change, in A.4.1.2, the value substituted into T1 from 60 to 600, when the
calculation is based on the Basquin model, known as a theoretical method, to
accelerate fatigue tests with equivalent damage, because it is printed incorrectly
in the original document;
-- Change 1.10 above the sum in the first column of Table A.16 to 1.15, because it is
printed incorrectly in the original document.
Please note that some of the contents of this document may involve patents. The issuing
organization of this document is not responsible for identifying patents.
This document was proposed by the Ministry of Industry and Information Technology
of the People’s Republic of China.
This document shall be under the jurisdiction of National Technical Committee of Auto
Standardization (SAC/TC 114).
Drafting organizations of this document: China Automotive Technology and Research
Center Co., Ltd., Contemporary Amperex Technology Co. Limited, CVC Certification
& Testing Co., Ltd., BAIC Motor Corporation., Ltd., Beijing National New Energy
Vehicle Technology Innovation Center Co., Ltd., Henan Tianhai Electric Co., Ltd.,
Waltek Testing Group Co., Ltd., SAIC-GM-Wuling Automobile Co., Ltd., Chongqing
Changan Automobile Co., Ltd., Beijing Chehejia Automobile Technology Co., Ltd.,
CRRC Times Electric Vehicle Co., Ltd., Honda Motor (China) Investment Co., Ltd.,
Road vehicles - Environmental conditions and testing for
electrical and electronic equipment for drive system of
electric propulsion vehicles - Part 3: Mechanical loads
1 Scope
This document specifies requirements for the electric propulsion systems and
components with maximum working voltages according to voltage class B. This
document describes the potential environmental stresses and specifies requirements
recommended for mechanical loads under different stress levels on/in the vehicle.
This document applies to electric propulsion systems and components with maximum
working voltages according to voltage class B; this document does not apply to high
voltage battery packs (e.g., for traction) and systems and components inside.
2 Normative references
The following documents are referred to in the text in such a way that some or all of
their content constitutes requirements of this document. For dated references, only the
version corresponding to that date is applicable to this document; for undated references,
the latest version (including all amendments) is applicable to this document.
GB/T 2423.5, Environmental testing - Part 2: Test methods - Test Ea and guidance:
Shock (GB/T 2423.5-2019, IEC 60068-2-27:2008, IDT)
GB/T 2423.7, Environmental testing - Part 2: Test methods - Test Ec: Rough
handling shocks, primarily for equipment-type specimens (GB/T 2423.7-2018, IEC
60068-2-31:2008, IDT)
GB/T 2423.22, Environmental testing - Part 2: Tests methods - Test N: Change of
temperature (GB/T 2423.22-2012, IEC 60068-2-14:2009, IDT)
GB/T 2423.56, Environmental testing - Part 2: Test methods - Test Fh: Vibration,
broadband random and guidance (GB/T 2423.56-2018, IEC 60068-2-64:2008, IDT)
GB/T 2423.58, Environmental testing for electric and electronic products - Part 2:
Tests -Test Fi: Vibration - Mixed Mode (GB/T 2423.58-2008, IEC 60068-2-80:2005,
IDT)
Y – engine speed, in r/min;
Z – number of cycles in the acceleration level.
Figure A.5 – Distribution of number of cycles
Furthermore, the number of cycles in the market driving is estimated from a ratio
dividing dwell time in the market driving by one chassis dynamometer measurement at
each classed normalized engine speed. A calculation example is shown for a normalized
engine speed of 1.15 and an acceleration level of 371.2 m/s2 as follows:
-- measurement time during chassis dynamometer measurement: 1.723 min (see
A.4.2.2.2);
-- measurement time for each engine speed classed by 0.05: 0.091 min (= 1.723/19
classes);
-- dwell time in the market for a normalized speed of 1.15: 0.21 h (see Table A.6);
-- time ratio between market driving and measurement: 139 times (= 0.21 ×
60/0.091);
-- number of cycles measured on chassis dynamometer for the speed: 23 cycles (see
Table A.15);
-- number of cycles in the market driving: 3 200 cycles (≈ 23 × 139).
The calculation above takes 19 classes for normalized engine speed. Although the
number of classes in Table A.15 is 24, there is no cycle during the 4 classes from 0 to
0.15 for this measurement, and in the other 20 classes, the start and end speeds of 0.2
and 1.15 have imperfect data when measured on chassis dynamometer. Therefore, 19
classes are taken into account instead of 20. Even if classes in low-speed range with
small acceleration levels are omitted, it is expected that their influence on the final
calculation result will be limited.
The same calculations are applied for all classes of speeds and accelerations and the
number of cycles in the market driving is calculated as shown in Table A.16. The total
sum of numbers of cycles for each acceleration level shown at the bottom line of the
table is used as actually imposed stress for theoretical verification in the next step (e.g.,
number of cycles of 105 089 for an acceleration level of 371 m/s2).
A.4.2.2.5 Verification of the dominant load from the high engine speed range
Using the Palmgren-Miner hypotheses, fatigue damage, S, is generally defined as a
dimensionless quantity by the following formulae:
......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.