GB/T 2423.47-2018Environmental testing - Part 2: Test methods - Test Fg: Acoustic vibration (English PDF)
环境试验 第2部分：试验方法 试验Fg：声振
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
December 28, 2018
Implementation date
July 1, 2019
Scope
GB/T 2423.47-2018 is the English-translated version of 环境试验 第2部分：试验方法 试验Fg：声振.
GB/T 2423.47-2018 is the Chinese standard "Environmental testing - Part 2: Test methods - Test Fg: Acoustic vibration".
Its scope clause reads: This Part of GB/T 2423 provides standard procedures and guidance for conducting acoustic tests in order to determine the ability of a specimen to withstand vibration caused by a specified sound-pressure level environment to which it is, or is liable to be, subjected.
For sound pressure level environments of less than 120 dB acoustic tests are not normally required. This Part determines the mechanical weakness and/or degradation in the performance of specimens and to use this information, in conjunction with the relevant specification, to decide on their acceptability for use.
The methods of test may also be used as a means of establishing the mechanical robustness or fatigue resistance of specimens.
Two procedures are described for conducting tests and for measurement of the sound pressure levels within the acoustic noise field and considers the need for measurement of the vibration responses at specified points on the specimen.
It also gives guidance for the selection of the acoustic noise environment, spectrum, sound pressure level and duration of exposure. The progressive wave tube method is relevant to material where aerodynamic turbulence will excite part, or all, of the total external surface.
Such applications include aircraft panel assemblies where the excitation exists on one side only. The reverberation chamber method is relevant where it is preferable to induce vibration onto the entire external surface of equipment by distributed excitation rather than fixed points by means of electro-dynamic shakers.
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Document preview — GB/T 2423.47-2018
National Standard of the People's Republic of China
Issued by: SAMR; SAC
Contents
- Foreword3
- Introduction5
- 1 Scope6
- 2 Normative References6
- 3 Terms, Definitions, and Symbols7
- 3.1 Terms and definitions7
- 3.2 Symbols and abbreviations11
- 4 Acoustic Environments and Requirements for Testing11
- 4.1 Acoustic environment for testing11
- 4.2 Sound sources13
- 4.3 Measuring apparatus14
- 4.4 Requirements for testing15
- 5 Recommended Severities18
- 6 Preconditioning19
- 7 Initial Measurements19
- 8 Testing19
- 8.1 Normal testing19
- 8.2 Accelerated testing20
- 9 Intermediate Measurements20
- 10 Recovery20
- 11 Final Measurements20
- 12 Information to be Given in the Relevant Specification20
- 13 Information to be Given in the Test Report21
- Annex A (Informative) Guidance for the Test Requirements23
- Bibliography32
1 Scope
This Part of GB/T 2423 provides standard procedures and guidance for conducting acoustic tests in order to determine the ability of a specimen to withstand vibration caused by a specified sound-pressure level environment to which it is, or is liable to be, subjected.
For sound pressure level environments of less than 120 dB acoustic tests are not normally required.
This Part determines the mechanical weakness and/or degradation in the performance of specimens and to use this information, in conjunction with the relevant specification, to decide on their acceptability for use. The methods of test may also be used as a means of establishing the mechanical robustness or fatigue resistance of specimens.
Two procedures are described for conducting tests and for measurement of the sound pressure levels within the acoustic noise field and considers the need for measurement of the vibration responses at specified points on the specimen. It also gives guidance for the selection of the acoustic noise environment, spectrum, sound pressure level and duration of exposure.
The progressive wave tube method is relevant to material where aerodynamic turbulence will excite part, or all, of the total external surface. Such applications include aircraft panel assemblies where the excitation exists on one side only. The reverberation chamber method is relevant where it is preferable to induce vibration onto the entire external surface of equipment by distributed excitation rather than fixed points by means of electro-dynamic shakers.
2 Normative References
The following documents are essential to the application of 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 27025-2008 General Requirements for the Competence of Testing and Calibration
Laboratories (ISO/IEC 17025:2005, IDT)
IEC 61672-1 Electroacoustics - Sound Level Meters - Part 1: Specifications
GB/T 2423.50 | GB/T 2423.48 | GB/T 2423.45 | GB/T 2423.56 | […]
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — all pages — is available in the English PDF.
Referenced standards
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Related Standards
GB/T 2423.48-2018 — Environmental testing - Part 2: Test methods - Test Ff: Vibration - Time-history and sine-beat method
GB/T 2423.45-2012 — Environmental testing - Part 2: Test methods - Test Z/ABDM: Climatic sequence
GB/T 2423.50-2025 — Environmental testing - Part 2: Test methods - Test Cy: Damp heat, steady state, accelerated test primarily intended for components
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