GB/T 2423.56-2023 PDF EnglishUS$560.00 · In stock · Download in 9 seconds
GB/T 2423.56-2023: Environmental testing - Part 2: Test methods - Test Fh: Vibration, broadband random and guidance Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 2423.56: Historical versions
Similar standardsGB/T 2423.56-2023: Environmental testing - Part 2: Test methods - Test Fh: Vibration, broadband random and guidance---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT2423.56-2023 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 19.040 CCS K 04 GB/T 2423.56-2023 / IEC 60068-2-64.2019 Replacing GB/T 2423.56-2018 Environmental testing - Part 2.Test methods - Test Fh. Vibration, broadband random and guidance (IEC 60068-2-64.2019, Environmental testing - Part 2-64.Tests - Test Fh. Vibration, broadband random and guidance, IDT) Issued on: SEPTEMBER 07, 2023 Implemented on: APRIL 01, 2024 Issued by. State Administration for Market Regulation; Standardization Administration of the People’s Republic of China. Table of ContentsForeword... 4 Introduction... 6 1 Scope... 7 2 Normative references... 7 3 Terms and definitions... 9 4 Requirements for test apparatus... 17 4.1 General... 17 4.2 Basic motion... 18 4.3 Cross-axis motion... 18 4.4 Mounting... 19 4.5 Measuring systems... 19 4.6 Vibration tolerances... 20 4.7 Control strategy... 23 4.8 Vibration response investigation... 24 5 Severities... 24 5.1 Test frequency range... 25 5.2 RMS value of acceleration... 25 5.3 Shape of acceleration spectral density curve... 25 5.4 Test duration... 26 6 Preconditioning... 26 7 Initial measurements and functional performance test... 26 8 Testing... 26 8.1 General... 26 8.2 Initial vibration response investigation... 27 8.3 Low-level excitation for equalization prior to testing... 28 8.4 Random testing... 29 8.5 Final vibration response investigation... 30 9 Recovery... 30 10 Final measurements and functional performance... 30 11 Information to be given in the relevant specification... 30 12 Information to be given in the test report... 32 Annex A (Informative) Standardized test spectra... 34 A.1 Transportation... 34 A.2 Stationary installation... 35 A.3 Equipment in wheeled vehicles... 36 A.4 Equipment installed in airplanes and helicopters... 38 Annex B (Informative) Guidance... 40 B.1 General introduction... 40 B.2 Requirements for testing... 41 B.3 Testing procedures... 43 B.4 Equipment normally used with vibration isolators... 43 B.5 Test severities... 44 B.6 Equipment performance... 44 B.7 Initial and final measurements... 44 Annex C (Informative) Guidance on non-Gaussian distribution/high kurtosis tests.. 45 C.1 Non-Gaussian random vibration... 45 C.2 Methods to generate non-Gaussian random vibration... 45 C.3 Additional analysis... 48 C.4 Frequency range... 49 Annex NA (Informative) Constituent documents of GB/T 2423... 50 Bibliography... 54ForewordThis document is drafted in accordance with the rules provided in GB/T 1.1-2020 Directives for standardization - Part 1.Rules for the structure and drafting of standardizing documents. This document is part 56 of GB/T 2423.See Annex NA for the published parts of GB/T 2423. This document replaces GB/T 2423.56-2018 Environmental testing - Part 2.Test methods - Test Fh. Vibration, broadband random and guidance. Compared with GB/T 2423.56-2018, except for structural adjustments and editorial changes, the main technical changes are as follows. a) Add the term “kurtosis” (see 3.39); b) Add the term “skewness” (see 3.40); c) Add the term “beta distribution” and “Figure 4” (see 3.41); d) Add relevant provisions for “parameters determined during non-Gaussian vibration testing” (see Clause 5); e) Add “For non-Gaussian vibration testing, the time history shall be recorded and the kurtosis, skewness (if applicable) and amplitude probability density shall be established as required by the relevant specification” and “Figure 5” (see 8.4.1). This document is identical to IEC 60068-2-64.2019 Environmental testing - Part 2-64. Test - Test Fh. Vibration, broadband random and guidance. This document makes the following minimal editorial changes. a) In order to coordinate with the existing standards, change the standard name to Environmental testing - Part 2.Test methods - Test Fh. Vibration, broadband random and guidance; b) Add Annex NA. Please note that some of the contents of this document may involve patents. The issuing organization of this document is not responsible for identifying patents. This document was proposed and managed by the National Technical Committee on Environmental Conditions of Electric and Electronic Products and Environmental Test of Standardization Administration of China (SAC/TC 8). Drafting organizations of this document. Guangzhou University, The Fifth Institute of Electronics, Ministry of Industry and Information Technology, Beijing University of Aeronautics and Astronautics, Shanghai Institute of Quality Inspection and Technical Research, Suzhou Sushi Testing Group CO., LTD., Zhongyuan Mechanical Instruments Ltd., China Aviation Technology Research Institute, Guangdong Labtone Testing Equipment Co., Ltd., Guangzhou Ceprei Information Technology Co., Ltd., Suzhou Xinke Testing Technology Co., Ltd. Main drafters of this document. Xu Zhonggen, Ji Chunyang, Chen Bochen, Wu Sa, Guo Xuan, Liu Fangfei, Xu Yi, Huang Xiaoguang, Zhang Yue, Sun Jianyong, Yang Guofu, Wang Miao, Wu Huan. This document was first published in 2006, and first revised in 2018.This is the second revision.1 ScopeThis document demonstrates the adequacy of specimens to resist dynamic loads without unacceptable degradation of its functional and/or structural integrity when subjected to the specified random vibration test requirements.2 Normative referencesThe following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 2041, Vibration and shock – Vocabulary Note. GB/T 2298-2010, Mechanical vibration, shock and condition monitoring – Vocabulary (ISO 2041.2009, IDT) IEC 60050-300, International Electrotechnical Vocabulary – Electrical and electronic measurements and measuring instruments – Part 311.General terms relating to measurements – Part 312.General terms relating to electrical measurements – Part 313. Types of electrical measuring instruments – Part 314.Specific terms according to the type of instrument GB/T 2421-2020, Environmental testing – General and guidance (IEC 60068- 1.2013, IDT) GB/T 2423.10-2019, Environmental testing – Part 2.Test methods – Test Fc. Vibration (sinusoidal) (IEC 60068-2-6.2007, IDT) GB/T 2423.43-2008, Environmental testing for electric and electronic products – Part 2.Test methods – Mounting of specimens for vibration impact and similar dynamic tests (IEC 60068-2-47.2005, IDT) GB/T 2424.26-2008, Environmental testing – Supporting documentation and guidance – Selecting amongst vibration tests (IEC 60068-3-8.2003, IDT) GB/T 2422-2012, Environmental testing – Guide to drafting of test methods – Terms and definitions (IEC 60068-5-2.1990 IDT) GB/T 4798 (all parts), Classification of environmental conditions – Classification of groups of environmental parameters and their severities [IEC 60721-3 (all parts)]3 Terms and definitionsFor the purposes of this document, the following terms and definitions, as well as those given in IEC 60050-300, IEC 60068-1, IEC 60068-2-6, IEC 60068-5-2 and ISO 2041, apply. 3.1 cross-axis motion motion not in the direction of the stimulus; generally specified in the two axes orthogonal to the direction of the stimulus 3.2 actual motion motion represented by the wideband signal returned from the reference point transducer4 Requirements for test apparatus4.1 General The required characteristics apply to the complete vibration system, which includes the power amplifier, vibrator, test fixture, specimen and control system when loaded for testing.5 SeveritiesThe test specifies an acceleration spectral density curve with increasing, decreasing and flat horizontal portions.6 PreconditioningIf the relevant specification calls for preconditioning it shall then prescribe the conditions.7 Initial measurements and functional performance testThe specimen shall be submitted to visual, dimensional and functional and any other checks as prescribed by the relevant specification.8 TestingTesting follows the sequence prescribed by the relevant specification. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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