GB/T 21563-2008 English PDF (GBT21563-2008)

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GB/T 21563-2008: Railway applications -- Rolling stock equipment -- Shock and vibration tests
GB/T 21563-2008
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 29.280
S 35
GB/T 21563-2008 / IEC 61373.1999
Railway applications - Rolling stock equipment -
Shock and vibration tests
(IEC 61373.1999, IDT)
ISSUED ON. MARCH 24, 2008
IMPLEMENTED ON. NOVEMBER 1, 2008
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration Committee.
Table of Contents
Foreword ... 4 
Introduction ... 5 
1 Scope ... 6 
2 Normative references ... 8 
3 Terms and definitions ... 9 
4 General ... 9 
5 Order of testing ... 10 
6 Reference information required by the test house ... 10 
7 Initial measurements and preconditioning ... 14 
8 Functional random vibration test conditions ... 14 
9 Simulated long-life testing at increased random vibration levels ... 16 
10 Shock testing conditions ... 17 
11 Transportation and handling ... 18 
12 Final measurements ... 18 
13 Acceptance criteria ... 19 
14 Report ... 19 
15 Test certificate ... 20 
16 Disposal... 20 
Annex A ... 27 
Annex B ... 33 
Annex C ... 42 
Foreword
This Standard is identical with IEC 61373.1999 Railway applications - Rolling
stock equipment - Shock and vibration tests.
This Standard is an equivalent translation of IEC 61373.1999.
For ease of use, this Standard makes the following editorial changes.
- Modified “this international standard” to “this Standard”;
- Used decimal point “.” to replace the comma “,” that acts as decimal point;
- Deleted the foreword of the international standard.
Annex A, Annex B, Annex C and Annex D of this Standard are informative.
This Standard was proposed by and shall be under the jurisdiction of National
Technical Committee on Electric Traction Equipment And Systems of
Standardization Administration of China.
The drafting organizations of this Standard. Zhuzhou CSR Times Electric Co.,
Ltd., CSR Sifang Locomotive Co., Ltd..
Main drafters of this Standard. Mao Yuanqi, Yan Wu, He Danlu.
Railway applications - Rolling stock equipment -
Shock and vibration tests
1 Scope
This Standard specifies the requirements for testing items of equipment
intended for use on railway vehicles which are subsequently subjected to
vibrations and shock owing to the nature of railway operational environment. To
gain assurance that the quality of the equipment is acceptable, it has to
withstand tests of reasonable duration that simulate the service conditions seen
throughout its expected life.
Simulated long-life testing can be achieved in a number of ways each having
their associated advantages and disadvantages, the following being the most
common.
a) amplification. where the amplitudes are increased and the time base
decreased;
b) time compression. where the amplitude history is retained and the time
base is decreased (increase of the frequency);
c) decimation. where time slices of the historical data are removed when
the amplitudes are below a specified threshold value.
The amplification method as stated in a) above, is used in this Standard and
together with the publications referred to in Clause 2; it defines the default test
procedure to be followed when vibration testing items for use on railway
vehicles. However, other standards exist and may be used with prior agreement
between the manufacturer and the customer. In such cases test certification
against this Standard will not apply. Where service information is available tests
can be performed using the method outlined in Annex A. If the levels are lower
than those quoted in this Standard, equipment is partially certified against this
Standard (only for service conditions giving functional test values lower than or
equal to those specified in the test report).
Whilst this Standard is primarily concerned with railway vehicles on fixed rail
systems, its wider use is not precluded. For systems operating on pneumatic
tyres, or other transportation systems such as trolleybuses, where the level of
shock and vibration clearly differ from those obtained on fixed rail systems, the
supplier and customer can agree on the test levels at the tender stage. It is
Annex B
(Informative)
Guidance for export of design level from random vibration test data
B.1 Introduction
During the design process, it is necessary to take measure to prevent
equipment / part failure in vibration test or later normal operation. This Annex
provides the calculation formula of vibration excitation amplitude for design
calculation. It also provides guidance on how to select random input value in
accordance with this Standard. An working example is listed in the end. Finally,
the basic formula is given in general form. An approximate formula is derived
based on Single Degree of Freedom (SDOF) system in this Annex.
Therefore, the design engineer has responsibility to choose a critical vibration
mode (SDOF system) to evaluate mechanical integrity of the design.
The calculation process described in this Annex is only for reference, not as
requirement of contract.
Suppliers and buyers shall be fully aware that evaluation on mechanical
integrity requires a certain degree of engineering judgment.
The Annex does not exclude the need of design or additional experimental
research, so as to comply with special contract or environmental requirements.
B.2 Purpose
Equipment is likely to be in shock during operation. Therefore, information
related to vibration degree is essential when calculating mechanical strength.
When there is no such information, this guidance shall provide replacement
method of deriving designed vibration excitation data in accordance with this
Standard. Thus, the design engineer shall be able to calculate stress, force or
acceleration response, so as to determine the fatigue damage. However, this
Standard does not involve special design method.
Although this Annex does not discuss shock calculation, it is recommended that
the design engineer can consider the shock excitation level of this Standard.
B.3 Definition
Peak factor. ratio of peak vibration on time domain to r.m.s. value.