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GB/T 28046.3-2011 (GBT28046.3-2011)

GB/T 28046.3-2011_English: PDF (GBT 28046.3-2011, GBT28046.3-2011)
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GB/T 28046.3-2011English145 Add to Cart 0--9 seconds. Auto-delivery Road vehicles -- Environmental conditions and testing for electrical and electronic equipment -- Part 3: Mechanical loads Valid GB/T 28046.3-2011

BASIC DATA
Standard ID GB/T 28046.3-2011 (GB/T28046.3-2011)
Description (Translated English) Road vehicles - Environmental conditions and testing for electrical and electronic equipment - Part 3: Mechanical loads
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard T36
Classification of International Standard 43.040.10
Word Count Estimation 35,380
Date of Issue 2011-10-31
Date of Implementation 2012-02-01
Quoted Standard GB/T 2423.6; GB/T 2423.8; GB/T 2423.10; GB/T 2423.22; GB/T 2423.56; GB/T 2423.58; GB/T 28046.1; GB/T 28046.4
Adopted Standard ISO 16750-3-2007, MOD
Drafting Organization Shanghai Quality Inspection and Technical Research
Administrative Organization National Automotive Standardization Technical Committee
Regulation (derived from) Announcement of Newly Approved National Standards No. 15 of 2011
Proposing organization National Development and Reform Commission
Issuing agency(ies) Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China; Standardization Administration of China
Summary This standard specifies the installation on the vehicle/specific location within the system/component possible mechanical environmental load, and the provisions and requirements of the test face. This section applies to automotive electrical and electronic systems/components.

Standards related to: GB/T 28046.3-2011

GB/T 28046.3-2011
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.040.10
T 36
GB/T 28046.3–2011
Road vehicles - Environmental conditions and testing
for electrical and electronic equipment -
Part 3. Mechanical loads
(ISO 16750-3.2007, MOD)
ISSUED ON. OCTOBER 31, 2011
IMPLEMENTED ON. FEBRUARY 01, 2012
Issued by. General Administration of Quality Supervision, Inspection
and Quarantine of the People’s Republic of China;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword ... 3 
1  Scope ... 5 
2  Normative References ... 5 
3  Terms and definitions ... 6 
4  Tests and requirements ... 6 
4.1  Vibration ... 6 
4.2  Mechanical shock ... 24 
4.3  Free fall ... 27 
4.4  Surface strength/scratch and abrasion resistance ... 28 
5  Code letters for mechanical loads ... 28 
Annex A (Informative) Guideline for the development of test profiles for
vibration tests ... 30 
Annex B (Informative) Recommended mechanical requirements for
equipment depending on the mounting location ... 41 
Foreword
GB/T 28046 Road vehicles -Environmental conditions and testing for electrical and
electronic equipment consists of five parts.
— Part 1. General;
— Part 2. Electrical loads;
— Part 3. Mechanical loads;
— Part 4. Climatic loads;
— Part 5. Chemical loads.
This is Part 3 of GB/T 28046.
This Part is drafted in accordance with the rules given in GB/T 1.1-2009.
This Part modifies and adopts, according to redrafting method, ISO 16750-3.2007 Road
vehicles - Environmental conditions and testing for electrical and electronic equipment -
Part 3. Mechanical loads.
Technical differences and reasons between this Part and ISO 16750-3.2007 are as
follows [Translator note. Key differences are highlighted in RED].
— Delete the description on Clause 6 in the previous standard as it has no guiding
significance;
— In order to unify the context and comprehension, add “The test and requirements
shall be negotiated by supplier and purchaser” into Sub-clause 4.5;
— The Figure 1 - 40 and Table 1 - 40 are apparent errors in the previous standard. In
order to maintain mutual corresponding and coordinating of serial standards, delete
Figure 1 - 40 and replace the Table 1 – 40 by Tmin. Meanwhile, add footnote into
Table 1. for Tmin, see GB/T 28046.4;
— Test standard is not given in 4.1.2.9.2 test of previous standard. According to other
test method, add the test that adopts GB/T 2423.10 to conduct test.
Compared with ISO 16750-3.2007, the editorial changes of this Part are as follows.
— Delete the foreword of the international standard.
This Part was proposed by National Development and Reform Commission (NDRC).
This Part shall be under the jurisdiction of National Technical Committee (SAC/TC 114) on
Road Vehicles of Standardization Administration of China.
The drafting organizations of this Part. Shanghai Quality Supervision and Inspection
Center, Chinese Automotive Technology & Research Centre, Beijing Zhongyuan Co., Ltd.,
Changsha Auto Electric Parts Research Centre, Shenzhen Hangsheng Electronics Co.,
Ltd., Dong Feng Motor Co., Ltd., Suzhou Taisite Electronic Science And Technology Co.,
Ltd., Shanghai Kostal-Huayang Automotive Electric Co., Ltd. AND Zhengzhou Yuebo
Automotive Electric Co., Ltd.
The drafting staffs of this Part. Lu Zhaoming, Xu Xiuxiang, Zhang Yue, Hu Mengjiao,
Wang Xibin, He Yujun, Sun Chengming, Gao Zhibiao and Zhang Yongying.
Road vehicles - Environmental conditions and testing
for electrical and electronic equipment -
Part 3. Mechanical loads
1 Scope
This Part describes the potential mechanical environmental stresses, and specifies tests
and requirements recommended for the specific mounting location on/in the road vehicle.
This Part applies to electrical and electronic systems/components for road vehicles.
2 Normative References
The articles contained in the following documents have become part of this Part when
they are quoted herein. For the dated documents so quoted, all the modifications
(including all corrections) or revisions made thereafter shall be applicable to this Part.
GB/T 2423.6 Environmental testing for electric and electronic products - Part 2. Test
methods - Test Eb and guidance. Bump (GB/T 2423.6-1995, IEC 60068-2-29.1987,
IDT)
GB/T 2423.8 Environmental testing for electric and electronic products - Part 2. Test
methods Test Ed. Free fall (GB/T 2423.8-1995, IEC 60068-2-32.1995, IDT)
GB/T 2423.10 Environmental testing for electric and electronic products - Part 2.
Tests methods - Test Fc. Vibration (sinusoidal) (GB/T 2423.10-2008, IEC
60068-2-6.1995, IDT)
GB/T 2423.56 Environmental testing for electric and electronic products - Part 2. Test
methods - Test Fh. Vibration, broad-band random(digital control) and guidance (GB/T
2423.56-2006, IEC 60068-2-64.1993, 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)
GB/T 28046.1 Road vehicles - Environmental conditions and testing for electrical and
electronic equipment - Part 1. General (GB/T 28046.1-2011, ISO 16750-1.2006, MOD)
GB/T 28046.4 Road vehicles - Environmental conditions and testing for electrical and
electronic equipment - Part 4. Climatic loads (GB/T 28046.4-2011, ISO 16750-4.2006,
MOD)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 28046.1 apply.
4 Tests and requirements
4.1 Vibration
4.1.1 General
The vibration test methods specified consider various levels of vibration severities
applicable to on-board electrical and electronic equipment. It is recommended that vehicle
manufacturer and supplier choose the test method, the environmental temperature and
vibration parameters depending on the specific mounting location.
The specified values apply to direct mounting in defined mounting locations. The use of a
bracket for mounting can result in higher or lower loads. If the device under test (DUT) is
used in the vehicle with a bracket, then all vibration and mechanical shock testing shall be
done with this bracket.
Carry out the vibration test with the DUT suitably mounted on a vibration table. The
mounting method(s) used shall be noted in the test report. Carry out the frequency
variation by logarithmic sweeping of 0.5 octave/minute for sinusoidal tests and the
sinusoidal part of sine on random tests. The objective of the recommended vibration tests
is to avoid malfunctions and breakage mainly due to fatigue in the field. Testing for wear
has special requirements and is not covered in this Part.
Loads outside the designated test frequency ranges shall be considered separately.
NOTE. Deviations from the load on the DUT can result if vibration testing is carried out in accordance
with this Part on a heavy and bulky DUT, as mounting rigidity and dynamic reaction on the vibrator table
excitation are different compared to the situation in the vehicle. This deviation can be minimized by
applying the average control method (see Annex A).
Application of the weighted average control method in accordance with GB/T 2423.56
shall be agreed upon.
Subject the DUT during the vibration test to the temperature cycle in accordance with
GB/T 2423.22, with electric operation in accordance with Figure 1. Alternatively, a test at
constant temperature may be agreed between customer and supplier.
Operate the DUT electrically as indicated in Figure 1 at Tmin (short functional test after the
DUT has reached Tmin completely). This functional test shall be as short as possible, i.e.
only long enough to check the proper performance of the DUT. This minimizes
self-heating of the DUT. Additional electrical operation of the DUT takes place between
210 min and 410 min of the cycle (see Figure 1).
A.5 Fatigue calculation
A.5.1 Example for passenger cars, body mounted (sprung masses)
A verification is made as to whether a 8 h random vibration test is sufficient to cover the
stress in the vehicle which occurs during the vehicle's lifetime.
NOTE. The measurements and calculations are made on an electronic control unit (ECU). This is
intended to be an example. The presented methods are neither restricted to ECUs, nor to body-mounted
components.
A.5.2 Procedure
A.5.2.1 Carry out vibration measurement in the car on the test track (road bumps) and
during the random vibration test on the ECU with at least two measurement points, one at
the ECU mounting location (input or excitation) and one to measure the response on the
printed circuit board (PCB).
A.5.2.2 Determine the load distribution on the PCB by means of a cycle counting method
(see A.5.5, A.5.6 and Figure A.2) during the measuring time.
A.5.2.3 Choose the car lifetime and the “bad road percentage” (both are selectable
parameters).
A.5.2.4 Calculate the expected PCB...
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