GB/T 21563-2018Railway applications—Rolling stock equipment—Shock and vibration tests (English PDF)

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.

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