GB/T 2423.56-2023

Environmental Testing Part 2: Test Method Test Fh: Broadband Random Vibration and Guidelines (English Version)

GB/T 2423.56-2023
Standard No.
GB/T 2423.56-2023
Language
Chinese, English version preview
Release Date
2023
Published By
General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest
GB/T 2423.56-2023
Replace
GB/T 2423.56-2018
Scope
This document provides a standard test method for random vibration to determine the ability of a specimen to resist dynamic loads without unacceptable functional degradation and/or structural incompleteness when subjected to a specified random vibration test. Broadband random vibration is suitable for identifying the effects of stress accumulation and degradation of specific functions. This information, combined with relevant specifications, is used to assess whether the specimen is acceptable. This document is applicable to specimens that may be subjected to random vibration during transportation or working environments, such as in aircraft, spacecraft and land vehicles. It is mainly used for unpackaged specimens and specimens whose packaging is part of the specimen itself during transportation. However, for packaged specimens, the specimen together with its packaging is considered to be the specimen.
Introduction

Standard Overview

GB/T 2423.56-2023, as an important part of the environmental test series of standards, is equivalent to the IEC 60068-2-64:2019 international standard, which specifies the methods and requirements for broadband random vibration tests. This standard is applicable to evaluating the ability of samples to resist random vibration dynamic loads in transportation or working environments, mainly for electrical and electronic products, and can be extended to other industrial fields.

Core Test Parameters

Parameter TypeOption RangeTypical Value Example
Frequency Range(f1-f2)1-5000Hz10-2000Hz
RMS Acceleration1-280 m/s²50 m/s²
Test Duration1min-24h2 hours

Application case:A certain on-board electronic equipment uses a frequency range of 20-2000Hz and a root mean square value of 35 m/s² to simulate the random vibration environment of the vehicle during driving. The test lasts for 4 hours.

Test equipment requirements

The vibration system must meet the following requirements:

  • The frequency range of the measurement system should cover 0.5f1 to 2f2
  • The acceleration spectrum density tolerance is ±3dB (f1-f2 interval)
  • The peak factor is ≥2.5, ensuring Gaussian distribution
  • The lateral movement does not exceed 50% of the main axis

The vibration table should be selected to match the sample mass and frequency characteristics, and the controller must have a resolution of at least 200 spectral lines.

Technology Evolution Analysis

Main updates compared to the 2018 version:

  1. New non-Gaussian vibration test requirements (kurtosis, skewness parameters)
  2. Added β distribution terms and diagrams
  3. Improved multi-point control strategy (average method/extreme value method)

The standard reflects the development trend from traditional Gaussian vibration to more complex vibration environment simulation, especially for high peak impact phenomena in fields such as transportation.

Implementation suggestions

1. Fixture design: Modal analysis should be performed to ensure that the first-order resonance frequency is higher than twice the upper limit frequency of the test
2. Parameter verification: Vibration response check should be performed before and after the test (sweep rate 1 oct/min is recommended)
3. Data recording: Save the original time domain data for non-Gaussian analysis
4. Safety protection: Large mass samples need to monitor lateral movement to prevent overturning

GB/T 2423.56-2023 Referenced Document

  • ISO 2041 Mechanical vibration, shock and condition monitoring - Vocabulary

GB/T 2423.56-2023 history

  • 2023 GB/T 2423.56-2023 Environmental Testing Part 2: Test Method Test Fh: Broadband Random Vibration and Guidelines
  • 2019 GB/T 2423.56-2018 Environmental Testing Part 2: Test Methods Test Fh: Broadband Random Vibration and Guidelines
  • 2006 GB/T 2423.56-2006 Environmental testing for electric and electronic products-Part 2:Test methods-Test Fh:Vibration,broad-band random(digital control) and guidance

GB/T 2423.56-2023 -All Parts

GB/T 2423.1-2008 Environmental testing for electric and electronic products.Part 2:Test methods.Tests A:Cold GB/T 2423.10-2019 Environmental testing—Part 2:Test methods—Test Fc:Vibration(sinusoidal) GB/T 2423.101-2008 Environmental testing for electric and electronic products.Part 2:Test methods.Test: Inclinations and swings GB/T 2423.102-2008 Environmental testing for electric and electronic products.Part 2:Test method.Test:combined temperature(cold and heat)/low air pressure/vibration(sinusoidal) GB/T 2423.11-1997 Environmental testing for electric and electronic products. Part 2: Test methods. Test Fd: Random vibration wide band--General requirements GB/T 2423.12-1997 Environmental testing for electric and electronic products. Part 2: Test methods. Test Fda: Random vibration wide band--Reproducibility high GB/T 2423.13-1997 Environmental testing for electric and electronic products. Part 2: Test methods. Test Fdb: Random vibration wide band--Reproducibility medium GB/T 2423.14-1997 Environmental testing for electric and electronic products. Part 2: Test methods. Test Fdc: Random vibration wide band--Reproducibility low GB/T 2423.15-2008 Environmental testing for electric and electronic products.Part 2:Tests methods.Test Ga and guidance:Acceleration,steady GB/T 2423.16-2022 Environmental testing—Part 2: Test methods—Test J and guidance: Mould growth GB/T 2423.17-2024 Environmental testing Part 2: Test methods Test Ka: Salt spray GB/T 2423.18-2021 Environmental testing—Part 2: Test methods—Test Kb:Salt mist, cyclic（sodium chloride solution） GB/T 2423.19-2013 Environmental testing.Part 2:Test methods.Test Kc:Sulphur dioxide test for contacts and connections GB/T 2423.2-2008 Environmental testing for electric and electronic products.Part 2:Test methods.Tests B:Dry heat GB/T 2423.20-2014 Environmental testing.Part 2: Test methods.Test Kd: Hydrogen sulphide test for contacts and connections GB/T 2423.21-2008 Environmental testing for electric and electronic products.Part 2 Test methods Test M:Low air pressure GB/T 2423.22-2012 Environmental testing.Part 2:Test methods.Test N:Change of temperature GB/T 2423.23-2013 Environmental testing.Part 2:Test methods.Test Q:Sealing GB/T 2423.24-2022 Environmental testing—Part 2: Test methods—Test S: Simulated solar radiation at ground level and guidance for solar radiation testing and weathering GB/T 2423.25-2008 Environmental testing for electric and electronic products.Part2:Tsets Tset Z/AM:Combined cold/low air pressure tests GB/T 2423.26-2008 Environmental testing for electric and electronic products.Part 2 Test methods TestZ/BM:Combined dry heat/low air pressure tests GB/T 2423.27-2020 Environmental testing—Part 2: Test methods—Test method and guidance: Combined temperature or temperature and humidity with low air pressure tests GB/T 2423.28-2005 Environmental testing for electric and electronic products.Part2:Test methods-Test T:Soldering GB/T 2423.29-1999 Environmental testing for electric and electronic products-- Part 2:Test methods Test U:robustness of terminations and integral mounting devices GB/T 2423.3-2016 Environmental testing—Part 2：Testing method—Test Cab:Damp heat,steady state


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