GB/T 4857.23-2021 PDF English
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Packaging - Basic tests for transport packages - Part 23: Vertical random vibration test method
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| GB/T 4857.23-2012 | English | 180 |
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Packaging -- Basic tests for transport packages -- Part 23: Random vibration test method
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GB/T 4857.23-2021: Packaging - Basic tests for transport packages - Part 23: Vertical random vibration test method
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GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 55.020
CCS A 83
Replacing GB/T 4857.23-2012
Packaging – Basic Tests for Transport Packages
– Part 23.Vertical Random Vibration Test Method
(ISO 13355.2016, Packaging – Complete, Filled Transport Packages
and Unit Loads – Vertical Random Vibration Test, MOD)
Issued on. OCTOBER 11, 2021
Implemented on. MAY 01, 2022
Issued by. State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword... 3
Introduction... 8
1 Scope... 10
2 Normative References... 10
3 Terms and Definitions... 10
4 Test Principle... 11
5 Test Equipment... 11
5.1 Vibration bench... 11
5.2 Vibration measurement control system... 11
6 Test Procedure... 12
6.1 Preparation of the test sample... 12
6.2 The No. of each part of the test sample... 12
6.3 Pre-treatment of test sample... 12
6.4 Temperature and humidity conditions during the test... 12
6.5 Test procedure... 12
7 Test Report... 13
Appendix A (Normative) Power Spectral Density Curve and Data for Random
Vibration of Generic Transportation... 15
Appendix B (Informative) Power Spectral Density Curve and Data from the
Actually-Collected Random Vibration... 16
Appendix C (Informative) Power Spectral Density Curve and Data for Testing in
Related International Random Vibration... 19
Appendix D (Informative) Power Spectral Density Curve and Data for Random
Vibration of China's Highway Transportation and Beijing-Shanghai Railway
Transportation... 22
Bibliography... 26
Foreword
This document was drafted as per the rules specified in GB/T 1.1-2020 Directives for
Standardization – Part 1.Rules for the Structure and Drafting of Standardizing
Documents.
This Document is Part 23 of GB/T 4857.GB/T 4857 has published the following parts.
--- Packaging – Basic tests for transport packages – Part 1.Identification of parts
when testing;
--- Packaging – Basic tests for transport packages – Part 2.Temperature and
humidity conditioning;
--- Packaging – Basic tests for transport packages – Part 3.Stacking tests using
static load;
--- Packaging – Basic tests for transport packages – Part 4.Compression and
stacking tests using a compression tester;
--- Packaging –transport packages – fall test methods;
--- Packaging –transport packages – rolling test methods;
--- Packaging – Basic tests for transport packages – Part 7.Sinusoidal vibration test
method at constant frequency;
--- Packaging – Basic tests for transport packages – Part 9.Water spray test;
--- Packaging – Basic tests for transport packages – Part 10.Sinusoidal vibration
test method using a variable vibration frequency;
--- Packaging – Basic tests for transport packages – Part 11.Horizontal impact test
methods;
--- Packaging –transport packages – Immersed water test method;
--- Packaging – Basic tests for transport packages – Part 13.Low air pressure test
method;
--- Packaging –transport packages – Topping test method;
--- Packaging – Basic tests for transport packages – Part 15.Controlled horizontal
impact test method;
--- Packaging – Basic tests for transport packages – Part 17.General rules for the
compilation of performance test;
--- Packaging –transport packages – Information record of the flow test;
--- Packaging –transport packages – Crash test method;
--- Packaging –transport packages – Stability test method for unit loads;
--- Packaging – Basic tests for transport packages – Part 23.Vertical random
vibration test method.
This Document replaced GB/T 4857.23-2012 Packaging - Basic tests for transport
packages - Part 23.Random vibration test method. Compared with GB/T 4857.23-
2012, this Document made the following technical changes as follows besides the
structural adjustments and editorial modifications.
a) Change the scope of application and change random vibration into vertical
random vibration (see Clause 1 of this Edition; Clause 1 of the 2012 Edition);
b) Delete equalization, σ drive signal clipping and closed loop in "Terms and
Definitions" (see 3.1, 3.3, 3.4 of 2012 Edition);
c) Add 3 kinds of devices that can be equipped with the vibration table to limit the
test sample state (see 5.1 of this Edition);
d) Change the frequency resolution from 2Hz to 1Hz (see 5.1 of this Edition; 5.2.3
of 2012 Edition);
e) Delete the closed-loop control system (see 5.2.1, 5.2.2 of 2012 Edition);
f) Change the statistical degrees of freedom [see 5.2c) of this Edition; 5.2.3 of 2012
edition];
g) Delete the choice of test intensity (see 6.5 of 2012 Edition);
h) Delete equipment calibration (see 6.6 of 2012 Edition);
i) Add the limit of horizontal vibration component (see 6.5.3 of this Edition);
j) Add the requirement of collecting power spectral density for testing (see 6.5.7 of
this Edition);
k) Add the requirements for the acceleration root mean square value and power
spectral density deviation (see 6.5.8 of this Edition);
l) Delete the requirements for samples to be placed in an unfixed way and fixed way
on the vibration table (see 6.7.4 and 6.7.5 of 2012 Edition);
m) Delete the requirement to stop the test when the test sample has predetermined
damage (see 6.7.7 of 2012 Edition);
n) Delete the requirement to increase the test intensity for shortening the test time
(see 6.7.8 of 2012 edition).
This Document uses the redrafting method to modify and adopt ISO 13355.2016
Packaging – Complete, filled transport packages and unit loads – Vertical random
vibration test.
Compared with ISO 13355.2016, this Document has the structural changes.
a) Add the Clause 3 “Terms and Definitions”.
b) Adjust the Clause 3 of ISO 13355.2016 into Clause 4 of this Document.
c) Adjust the Clause 4 of ISO 13355.2016 into Clause 5 of this Document; adjust
4.1 and 4.2 of ISO 13355.2016 into 5.1 and 5.2 of this Document, respectively.
d) Adjust “The installation of test sample on vibration bench shall comply with the
provisions of 9.1.3.5 in GB/T 4857.17-2017” specified in Clause 4 of ISO
13355.2016 into 6.5.2 of this Document.
e) Adjust 5.1 of ISO 13355.2016 into 6.1 of this Document; adjust 5.2 of ISO
13355.2016 into 6.3 of this Document; and adjust Clause 6 of ISO 13355.2016
into 6.5 of this Document.
f) Add the Appendixes C and D.
The technical differences and causes between this Document and ISO 13355.2016
are as follows.
a) Regarding Normative References, this Document has made adjustments with
technical differences to adapt to China’s technical conditions. The adjustments
are reflected in Clause 2 Normative References. The specific adjustments are
as follows.
Add the quotation of GB/T 4122.5 (see Clause 3 of this Edition);
Use GB/T 4857.1 that modifies and adopts the international standard to
replace ISO 2006 (see 6.2 of this Edition);
Use GB/T 4857.2 that modifies and adopts the international standard to
replace ISO 2233 (see 6.3 of this Edition);
Use GB/T 4857.3 that equivalently adopts the international standard to
replace ISO 2234 (see 6.5.2 of this Edition);
Add the quotation of GB/T 4857.17-2017 (6.5.2, 6.1 of this Edition);
b) Add the Clause 3 “Terms and Definitions”; give specific definitions on PSD and g
rms;
c) Delete the provisions of frequency range 2Hz ~ 200Hz specified in 4.1 of ISO
13355.2016, and the vibration frequency is changed into meeting the frequency
range required by the test. The test frequency range shall be determined
according to the actual needs, and there is no mandatory requirement. Add 5.1c)
"A device used to simulate the fixing of the package during transportation", the
transportation package may be fixed during transportation;
d) CHANGE the requirements for vibration testing under conditions close to the pre-
treatment temperature and humidity in other cases specified in Clause 6 of ISO
13355.2016 INTO "Temperature and humidity conditions during the test" of 6.4
in this Document. If the pre-treatment conditions are not met, then the test shall
be started within 5 min of the test sample leaving the pre-treatment condition.
This is because the general laboratory environment is difficult to meet the
temperature and humidity conditions specified in GB/T4857.2;
e) Add the instructions on test safety in 6.5.4.It facilitates the personal safety of
testers during the test and to protect the safety of test equipment and test
samples;
f) Add the size of the test sample [see Clause 7 k)]; the size and quality are basic
elements for describing the test sample.
This Document made the following editorial modifications.
a) Change the standard name of ISO 13355.2016; in order to coordinate the
standard name of the parts, CHANGE Packaging – Complete, filled transport
packages and unit loads – vertical random vibration test INTO Packaging – Basic
tests for transport packages – Part 23.Vertical random vibration test method.
b) Delete the content of NOTE in Clause 1 of ISO 13355.2016; the provisions of
test sample are made requirements in 6.1 ~ 6.3;
c) Delete the content of NOTE in Clause 3 of ISO 13355.2016, which is duplicated
with the requirements of 6.5.2;
d) Change the name of Clause 4 in ISO 13355.2016 into “Test Equipment”;
e) Change the name of 4.2 in ISO 13355.2016 into “Vibration measurement control
system”;
f) Delete the acceleration spectral density and slope data in Table A.1 of ISO
13355.2016; delete acceleration spectral density data in Table B.1; delete
acceleration spectral density data in Table B.3.And only retain the frequency and
power spectral density data in each table. The random vibration test of the
transportation package uses the power spectral density instead of the
acceleration spectral density.
Please note some contents of this Document may involve patents. The issuing agency
of this Document shall not assume the responsibility to identify these patents.
This Document was proposed by and under the jurisdiction of National Technical
Committee for Standardization of Packaging (SAC/TC 49).
Drafting organizations of this Document. China Packaging Research & Test Centre;
Zhongshan Torch Polytechnic; SGS-CSTC Standards Technical Services Co., Ltd.;
Suzhou Zhongbao Packaging Testing Technology Co., Ltd.; Shandong Jiaotong
University; Anhui Mys Zg Technology Co., Ltd.; and China Packaging Research
Institute Co., Ltd.
Chief drafting staffs of this Document. Chen Zhenqiang, Tao Liangyi, Yu Jun, Yang Lin,
Wang Jun, Chen Like, Zhang Weihong, Gao Yanfei, Li Yang, Li Peng, Xu Shouzhi, and
Chen Jianling.
The historical editions replaced by this Document are as follows.
--- GB/T 4857.23-2003 was first-time published in 2003; first-time revised in 2012;
--- This is the second-time revised hereby.
1 Scope
This Document specifies the vertical random vibration test principles, test equipment,
test procedures and test reports of transport packages.
This Document is applicable to the vertical random vibration test of transport packages
or unit loads
2 Normative References
The provisions in following documents become the provisions of this Document
through reference in this Document. For the dated documents, only the versions with
the dates indicated are applicable to this Document; for the undated documents, only
the latest version (including all the amendments) is applicable to this Document.
GB/T 4122.5 Packaging terms - Part 5.Inspection and test
GB/T 4857.1 Packaging - Basic tests for transport packages - Part 1.Identification
of parts when testing (GB/T 4857.1-2019, ISO 2206.1987, MOD)
3 Terms and Definitions
For the purposes of this Document, the terms and definitions given in GB/T 4122.5 and
the following apply.
The square mean value of the acceleration signal of random vibration at unit frequency.
The square root value of the PSD integral value in the entire frequency range.
4 Test Principle
Under the specified environmental conditions, the test sample is placed on the
vibration bench in a predetermined direction and fixed manner, and within a certain
frequency range, a vertical random vibration test is carried out for a certain period of
time according to the predetermined test intensity.
5 Test Equipment
The vibrating bench shall have a sufficiently large size, sufficient strength, rigidity and
load-bearing capacity. The structure shall be able to ensure that the surface of the
vibration bench remains horizontal when vibrating. And its lowest resonance frequency
shall be higher than the highest test frequency.
The vibration bench can be equipped with the following auxiliary devices.
6 Test Procedure
According to the provisions of GB/T4857.2, select a condition to pre-treat the
temperature and humidity of the test sample.
The test shall be started with a vibration lower than the predetermined PSD 6dB, so
that the control system is balanced at a lower test intensity; and then the test intensity
is increased in one or more steps until it reaches the predetermined value and
completes the random vibration for the predetermined time. The adjustment time of
vibration intensity is not included in the test time.
7 Test Report
The test report shall include the following information.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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