GB/T 5170.21-2023Inspection methods for environmental testing equipments—Part 21:Hydraulic vibrating type system for vibration (random) test (English PDF)
环境试验设备检验方法 第21部分：振动（随机）试验用液压式振动系统
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
September 7, 2023
Implementation date
April 1, 2024
Scope
GB/T 5170.21-2023 is the English-translated version of 环境试验设备检验方法 第21部分：振动（随机）试验用液压式振动系统.
GB/T 5170.21-2023 is the Chinese national inspection method for hydraulic vibration systems used in random vibration testing, and is Part 21 of GB/T 5170.
It sets the inspection items, the measuring instruments for lateral vibration, random acceleration root-mean-square value and acceleration spectral density, the inspection conditions, inspection load and accelerometer mounting, and the inspection methods for transverse vibration ratio, acceleration root-mean-square error, spectral density indication error, control accuracy tolerance and rated parameters.
Its contents list also covers measurement uncertainty, the inspection report and the inspection cycle. Clause 1 applies it to the inspection of hydraulic vibration systems used for the vibration tests of GB/T 2423.56 and GB/T 2424.25, and to similar test equipment.
It replaces GB/T 5170.21-2008, was issued on 7 September 2023 and has applied since 1 April 2024.
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Document preview — GB/T 5170.21-2023
National Standard of the People's Republic of China
- ICS
- 19.040
- Classification
- A 21
- Replacing
- GB/T 5170.21-2008
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Preface
- Introduction
- 1 Scope
- 2 Normative reference documents
- 3 Terms and Definitions
- 4 Inspection item
- 5 Measuring instruments
- 5.1 Lateral vibration measuring instruments
- 5.2 Random acceleration root mean square value measuring instrument
- 5.3 Random acceleration spectral density measuring instrument
- 6 Inspection conditions
- 6.1 Environmental conditions
- 6.2 Appearance and safety conditions
- 6.3 Inspection load
- 6.4 Installation of accelerometer
- 7 Inspection method
- 7.1 Inspection of appearance and working environment conditions
- 7.2 Install load
- 7.3 Install sensor
- 7.4 Transverse vibration ratio
- 7.5 Acceleration root mean square error
- 7.5.1 Indication error of acceleration root mean square value
- 7.5.2 Ratio of root mean square acceleration value inside and outside the band
- 7.5.3 Uniformity of acceleration root mean square value
- 7.6 Acceleration spectral density indication error
- 7.7 Acceleration control accuracy tolerance
- 7.7.1 Acceleration root mean square value control accuracy
- 7.7.2 Acceleration power spectral density control accuracy
- 7.8 Rated parameter inspection
- 7.8.1 Test of the root mean square value of maximum acceleration
- 7.8.2 Inspection of maximum random thrust
- 7.8.3 Inspection of maximum load
- 8 Measurement uncertainty
- 9 Inspection report
- 10 inspection cycle
- Appendix A (Informative) Basic Parameter Allowable Error
- Appendix B (informative) Description of measurement uncertainty in inspection
- B.1 Calculation of expanded uncertainty of measurement (U)
- B.2 Expanded uncertainty of acceleration measurement over the entire acceleration range
- Reference
Foreword
This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents" Drafting.
This document is Part 21 of GB/T 5170.GB/T 5170 has released the following parts.
---GB/T 5170.1-2016 Inspection methods for environmental testing equipment for electrical and electronic products Part 1: General principles;
---GB/T 5170.2-2017 Environmental test equipment inspection methods Part 2: Temperature test equipment;
---GB/T 5170.5-2016 Inspection methods for environmental testing equipment for electrical and electronic products Part 5: Humidity and heat testing equipment;
---GB/T 5170.8-2017 Environmental test equipment inspection methods Part 8: Salt spray test equipment;
---GB/T 5170.9-2017 Environmental test equipment inspection methods Part 9: Solar radiation test equipment;
---GB/T 5170.10-2017 Environmental test equipment inspection methods Part 10: High, low and low pressure test equipment;
---GB/T 5170.11-2017 Environmental test equipment inspection methods Part 11: Corrosive gas test equipment;
---GB/T 5170.13-2018 Inspection methods for environmental testing equipment Part 13: Mechanical vibration for vibration (sinusoidal) testing system;
---GB/T 5170.14-2023 Inspection methods for environmental testing equipment Part 14: Electric vibration for vibration (sinusoidal) testing system;
---GB/T 5170.15-2018 Environmental test equipment inspection methods Part 15: Hydraulic vibration for vibration (sinusoidal) testing system;
---GB/T 5170.16-2018 Environmental test equipment inspection methods Part 16: Centrifuge for steady-state acceleration test;
---GB/T 5170.17-2005 Verification method for basic parameters of environmental testing equipment for electrical and electronic products Low temperature/low pressure/damp heat Comprehensive sequential testing equipment;
---GB/T 5170.18-2022 Environmental test equipment inspection methods Part 18: Temperature/humidity combined cycle test equipment;
---GB/T 5170.19-2018 Environmental test equipment inspection methods Part 19: Temperature, vibration (sinusoidal) comprehensive test equipment;
---GB/T 5170.20-2022 Inspection methods for environmental testing equipment Part 20: Water testing equipment; system.
This document replaces GB/T 5170.21-2008 "Vibration (random) test method for basic parameter inspection of environmental testing equipment for electrical and electronic products" "Hydraulic Vibrating Table for Inspection", compared with GB/T 5170.21-2008, in addition to structural adjustments and editorial changes, the main technical changes are as follows.
---For ease of use, some terms and definitions in GB/T 5170.1 are repeatedly listed (see 3.2);
---The inspection items have been changed. According to the test requirements of GB/T 2423.56 and the relevant standards of the appendix "Standard Test Spectrum", the vibration control has been deleted.
As for the inspection content of the system, the vibration controller and the vibration table are combined into a vibration system for inspection; the root mean square of the acceleration of the vibration system is increased.
Test items for value uniformity (see Chapter 4, Chapter 4 of the 2008 edition);
---Changed the vibration system spectral type in the inspection method (see Chapter 7, Chapter 8 of the 2008 edition);
---For ease of use, the environmental conditions during specific inspections are listed (see 6.1);
---According to the requirements of GB/T 5170.1, "the inspection report shall include at least the following information" (see Chapter 9).
Introduction
GB/T 5170 "Environmental Test Equipment Inspection Methods" is mainly applicable to GB/T 2423 "Environmental Testing Part 2: Test Methods" The purpose of inspection of test equipment used in sub-standards and similar test method standards is to confirm whether the test equipment complies with the test method. requirements of the law. GB/T 5170 is intended to consist of the following parts.
---Part 1: General principles. The purpose is to stipulate common terms, inspection conditions, inspection cycles, etc. for environmental test equipment inspection. Require.
---Part 2: Temperature test equipment. The purpose is to specify the inspection methods of temperature (including low temperature, high temperature and temperature change) testing equipment and related requirements.
---Part 5: Damp heat test equipment. The purpose is to specify the inspection methods and related requirements for damp and heat test equipment.
---Part 8: Salt spray test equipment. The purpose is to specify the inspection methods and related requirements for salt spray test equipment.
---Part 9: Solar radiation test equipment. The purpose is to specify the inspection methods and related requirements for solar radiation test equipment.
---Part 10: High-low-temperature and low-pressure test equipment. The purpose is to specify high, low and low pressures (including low pressure, low temperature and low pressure and high pressure).
Temperature and low pressure) test equipment inspection methods and related requirements.
---Part 11: Corrosive gas testing equipment. The purpose is to specify the inspection methods and related requirements for corrosive gas testing equipment.
---Part 13: Mechanical vibration system for vibration (sinusoidal) testing. The purpose is to specify mechanical vibration for vibration (sinusoidal) testing Systematic inspection methods and related requirements.
---Part 14: Electric vibration system for vibration (sinusoidal) testing. The purpose is to specify electric vibration tables for vibration (sinusoidal) testing inspection methods and related requirements.
---Part 15: Hydraulic vibration system for vibration (sinusoidal) testing. The purpose is to specify hydraulic vibration for vibration (sinusoidal) testing Systematic inspection methods and related requirements.
---Part 16: Centrifuge for steady-state acceleration testing. The purpose is to specify the inspection methods of centrifuges for steady-state acceleration tests and related requirements.
---Part 17: Low temperature/low pressure/humid heat comprehensive sequential test equipment. The purpose is to specify the comprehensive sequence of low temperature/low pressure/humid heat Inspection methods and related requirements for test equipment.
---Part 18: Temperature/humidity combined cycle test equipment. The purpose is to specify the inspection of temperature/humidity combined cycle test equipment methods and related requirements.
---Part 19: Temperature, vibration (sinusoidal) comprehensive test equipment. The purpose is to specify the temperature and vibration (sinusoidal) comprehensive test equipment Inspection methods and related requirements.
---Part 20: Water testing equipment. The purpose is to specify the inspection methods and related requirements for water testing equipment.
---Part 21: Hydraulic vibration system for vibration (random) testing. The purpose is to specify hydraulic vibration tables for vibration (random) testing inspection methods and related requirements.
---Part 22: Reverberation field test equipment for acoustic and vibration testing. The purpose is to specify the inspection items of reverberation field test equipment for acoustic and vibration tests. Objectives, conditions, matrices, methods, result processing and time intervals.
The inspection methods given in this document are mainly used for inspection of hydraulic vibration systems for vibration tests in GB/T 2423.56 and GB/T 2424.25. test. The hydraulic vibration system for vibration (random) testing is a set of environmental testing equipment used to generate vibration (random) excitation and is used to test specimens.
Conduct vibration (random) tests under pre-specified conditions. The inspection method is the basic means of quality characterization. The reliable and consistent inspection method is inspection.
Guarantee of data comparability. According to the test requirements of GB/T 2423.56, document inspection of hydraulic vibration systems for vibration (random) testing The method is specified.
1 Scope
This document specifies the characteristics requirements, measuring instruments, and measuring instruments of a hydraulic vibration system (hereinafter referred to as "vibration system") for vibration (random) testing.
Quantitative uncertainty, inspection load, inspection conditions, inspection methods, inspection results, inspection cycle, etc.
This document applies to the inspection of hydraulic vibration systems for vibration tests in GB/T 2423.56 and GB/T 2424.25.
This document also applies to the inspection of similar test equipment.
2 Normative reference documents
The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document.
GB/T 5170.1 Inspection methods for environmental testing equipment for electrical and electronic products Part 1: General principles
JJF1059.1 Evaluation and expression of measurement uncertainty
3 Terms and definitions
The terms and definitions defined in GB/T 5170.1 and the following apply to this document.
3.1 amplitude uniformity
The vibration amplitude (acceleration, velocity or displacement) of any point on the vibration system table is phase with the vibration amplitude (acceleration, velocity or displacement) of the reference point. The maximum absolute value of the deviation.
3.2 transverse vibration ratio
The root mean square value of the acceleration (power spectral density value) of the vibration system or impact table moving in the direction perpendicular to the working axis and the acceleration in the direction of the working axis
The maximum ratio of the speed root mean square value (power spectral density value). [Source: GB/T 5170.1-2016, 3.3.21, modified]
3.3 Within
the interval between the lower frequency limit f1 and the upper frequency limit f2, the square root value of the average value of the square of the acceleration. Usually through acceleration spectrum density
Find the square root of the area of a degree curve.
3.4 acceleration spectral density
When the bandwidth approaches zero and the average time approaches infinity, the addition of the central frequency narrowband filter on each unit bandwidth The mean square value of the speed signal. It is used to characterize the distribution of the acceleration mean square value contained in each frequency component of the random signal in the frequency domain.
Note. The unit is m2/s3 or (m/s2)2/Hz.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 17 pages — is available in the English PDF.
Referenced standards
Similar standards
Editions of GB/T 5170.21
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 5170.21-2023 | Inspection methods for environmental testing equipments—Part 21:Hydraulic vibrating type system for vibration (random) test | current edition | Current |
| GB/T 5170.21-2008 | Inspection methods for environmental testing equipments—Part 21:Hydraulic vibrating type system for vibration (random) test | previous edition | Superseded |
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Related Standards
GB/T 5170.1-2016 — Inspection methods for environmental testing equipments for electric and electronic products—Part 1: General
GB/T 5170.10-2017 — Inspection methods for environmental testing equipments—Part 10: Combined high and low temperature/low air pressure testing equipments
GB/T 5170.11-2017 — Inspection methods for environmental testing equipments—Part 11: Corrosive gas testing equipments
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