GB/T 2423.48-2018 PDF EnglishUS$565.00 · In stock · Download in 9 seconds
GB/T 2423.48-2018: Environmental testing - Part 2: Test methods - Test Ff: Vibration - Time-history and sine-beat method 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 2423.48: Historical versions
Similar standardsGB/T 2423.48-2018: Environmental testing - Part 2: Test methods - Test Ff: Vibration - Time-history and sine-beat method---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/GBT2423.48-2018 NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 19.040 K 04 GB/T 2423.48-2018 / IEC 60068-2-57.2013 Replacing GB/T 2423.48-2008, GB/T 2423.49-1997 Environmental testing - Part 2.Test methods - Test Ff. Vibration - Time-history and sine-beat method (IEC 60068-2-57.2013, Environmental testing - Part 2-57.Tests - Test Ff. Vibration - Time-history and sine-beat method, IDT) Issued on. DECEMBER 28, 2018 Implemented on. JULY 01, 2019 Issued by. State Administration for Market Regulation; Standardization Administration of the People's Republic of China. Table of ContentsForeword... 4 Introduction... 6 Figure 1 -- Sequence of five sine beats with five cycles... 7 1 Scope... 8 2 Normative references... 8 3 Terms and definitions... 8 Figure 2 -- Number of cycles per sine beat... 15 Figure 3 -- Typical time history... 15 Figure 4 -- Typical logarithmic plot of a required response spectrum, test response spectrum and tolerance zone... 16 4 Test requirements and associated parameters... 16 4.1 General... 16 4.2 Requirements for testing... 16 Table 1 -- Comparison of tolerances... 17 4.3 Vibration response investigation... 17 4.4 Time-history testing... 20 4.5 Sine-beat testing... 21 4.6 Mounting... 22 5 Severities... 23 5.1 General... 23 5.2 Time history... 24 5.3 Test frequency range... 24 Table 2 -- Recommended test frequency ranges... 24 5.4 Required response spectrum... 24 5.5 Number and duration of time-histories... 25 Figure 5 -- Typical response of an oscillator excited by a specific time history during a test (70% of specified limit)... 26 5.6 Sine-beat test level... 26 Table 3 -- Recommended test levels with a crossover frequency of 0.8 Hz (see Figure 6) ... 27 Figure 6 -- Recommended test level with crossover frequency at 0.8 Hz... 28 Table 4 -- Recommended test levels with a crossover frequency of 1.6 Hz (see Figure 7) ... 28 Table 5 -- Recommended test levels with a crossover frequency of 8 Hz (see Figure 8). 28 Figure 7 -- Recommended test level with crossover frequency at 1.6 Hz... 30 Figure 8 -- Recommended test level with crossover frequency at 8 Hz... 30 Figure 9 -- Amplification factors of different sine beats, continuous sine and a typical natural time-history... 32 6 Preconditioning... 32 7 Initial measurements... 32 8 Testing... 33 8.1 General... 33 8.2 Vibration response investigation... 33 8.3 Time-history testing... 34 8.4 Sine-beat testing... 34 8.5 Multi-axis testing... 34 9 Intermediate measurements... 35 10 Recovery... 35 11 Final measurements... 35 12 Information to be given in the relevant specification... 35 13 Information to be given in the test report... 36 Annex A (informative) Guidance for time-history and sine-beat methods... 38 Figure A.1 -- Recommended shape of a required response spectrum in generalized form ... 41 Figure A.2 -- Standardized presentation of matched sine beats of acceleration, velocity and displacement (five cycles within the sine beat of acceleration)... 45 Bibliography... 46ForewordGB/T 2423 “Environmental testing - Part 2” is divided into several parts according to test methods. This Part is Part 48 of GB/T 2423. This Part was drafted in accordance with the rules given in GB/T 1.1-2009. This Part replaces GB/T 2423.48-2008 “Environmental testing for electric and electronic products - Part 2.Test methods - Test Ff. Vibration- Time-history method” and GB/T 2423.49-1997 “Environmental testing for electric and electronic products Part 2.Test methods Test Fe. Vibration-sine-beat method”. Compared with GB/T 2423.48-2008 and GB/T 2423.49-1997, in addition to editorial modifications, the main technical changes are as follows. - combined the contents of GB/T 2423.48-2008 and GB/T 2423.49-1997; rearranged the structure of this Part; - deleted GB/T 2423.5-1995, ISO 266.1997 and ISO 2041.1990, GB/T 2298-1991 as references; - noted the sources of the terms and definitions; modified some definitions and explained the modification; - modified the definition for “damping”; added the terms “viscous damping”, “high stress cycles”, “natural time history”; added the note of the term “signal tolerance”; deleted the terms "response peak", "random motion sample", "sampling frequency", "distortion", and "strong part of the specified response spectrum"; - modified the content of “general requirements”; - modified the content of “test frequency range”; - added the requirements for test tolerance; - deleted “parasitic movement”; separated the concepts of "lateral motion" and "rotational motion"; - modified “signal tolerance” and “vibration amplitude tolerance”; - deleted "calculation of test response spectrum"; - modified "number of response high peaks", "vibration response check" and "time history test"; - deleted Annex B “Test frequency range” of GB/T 2423.48-2008; - modified Annex A “Guidelines” of GB/T 2423.49-1997; - added Clause 13 "Information to be given in the test report". This Part uses translation method to identically adopt IEC 60068-2-57.2013 “Environmental testing - Part 2-57.Tests - Test Ff. Vibration - Time-history and sine- beat method”. The Chinese documents which have consistency with the international normative references in this Part are as follows. - GB/T 2421.1-2008, Environmental Testing for Electric and Electronic products - General and Guidance (IEC 60068-1.1998, IDT); - GB/T 2423.10-2008, Environmental testing for electric and electronic products - Part 2.Tests methods - Test Fc. Vibration (sinusoidal) (IEC 60068-2-6.1995, IDT); - GB/T 2424.26-2008, Environmental testing - Supporting documentation and guidance - Selecting amongst vibration tests (IEC 60068-3-8.2003, IDT); - GB/T 2423.56-2018, Environmental testing - Part 2.Test methods - Test Fh. Vibration, broadband random and guidance (IEC 60068-2-64.2008, IDT). For ease of use, this Part made the following editorial changes. - the name of this Part is modified to “Environmental testing - Part 2.Test methods - Test Ff. Vibration - Time-history and sine-beat method”. This Part was proposed by and shall be under the jurisdiction of National Technical Committee on Environmental Conditions and Environmental Tests of Electrical and Electronic Products of Standardization Administration of China (SAC/TC 8). The drafting organizations of this Part. The Fifth Electronic Research Institute of the Ministry of Industry and Information Technology, Chongqing Saibao Industrial Technology Research Institute, Wuhu Saibao Information Industry Technology Research Institute Co., Ltd. Main drafters of this Part. Xie Zhangyong, Zhouyang Hongsheng, Yangchuan, Hou Weiguo. Versions of standard substituted by this Standard are. - GB/T 2423.48-1997, GB/T 2423.48-2008; - GB/T 2423.49-1997.1 ScopeThis Part of GB/T 2423 provides a standard procedure for determining, by the time- history and sine-beat methods, the ability of a specimen to withstand specified severities of transient vibration.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. GB/T 2424.25-2000, Environmental testing for electric and electronic products Part 3.Test guidance Seismic test methods (IEC 60068-3-3.1991, IDT)3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply. NOTE. Some of the following terms can be found in ISO 2041 [4], IEC 60068-1 or in IEC 60068- 2-6.Where, for the convenience of the reader, a definition from one of those sources is included here, it is indicated.4 Test requirements and associated parametersThe requirements for a vibration response investigation are given in 4.3, those for time- history testing in 4.4, those for sine-beat testing in 4.5 while 4.6 deals with mounting for testing.5 SeveritiesThe test frequencies and the test frequency range are obtained as shown in 5.3. The test frequency range shall be given in the relevant specification by selecting a lower frequency from 0.1 Hz, 1 Hz, 5 Hz, 10 Hz, 55 Hz, 100 Hz and an upper frequency from 10 Hz, 20 Hz, 35 Hz, 55 Hz, 100 Hz, 150 Hz, 300 Hz, 500 Hz, 2 000 Hz. The recommended ranges are shown in Table 2.6 PreconditioningThe relevant specification may call for preconditioning as, for example, conditioning the specimen with defined temperature and/or humidity.7 Initial measurementsThe specimen shall be submitted to the visual, dimensional and functional checks prescribed by the relevant specification.8 TestingFor sine-beat testing, values for the severity are given by the relevant specification according to Clause 5.Between consecutive sine beats a pause shall be included such that no significant superposition of response motion of the specimen occurs.9 Intermediate measurementsWhen prescribed by the relevant specification, the specimen shall function during a prescribed number of time-history or sine-beat tests and its performance shall be checked.10 RecoveryIt is sometimes necessary, when prescribed by the relevant specification, to provide a period of time after testing and before final measurements to allow the specimen to attain the same conditions, for example of temperature, as existed for the initial measurements.11 Final measurementsThe specimen shall be submitted to the visual, dimensional and functional checks prescribed by the relevant specification.12 Information to be given in the relevant specificationWhen either of these tests is included in a relevant specification, the following details shall be given, in so far as they are applicable, paying particular attention to the items marked with an asterisk (*) as this information is always required. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of GB/T 2423.48-2018 be delivered?Answer: The full copy PDF of English version of GB/T 2423.48-2018 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of GB/T 2423.48-2018_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 2423.48-2018_English will be deemed to be sold to your employer/organization who actually paid for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. www.ChineseStandard.us -- GB/T 2423.48-2018 -- Click this link and select your country/currency to pay, the exact amount in your currency will be printed on the invoice. Full PDF will also be downloaded/emailed in 9 seconds.Question 5: Should I purchase the latest version GB/T 2423.48-2018?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 2423.48-2018 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.How to buy and download a true PDF of English version of GB/T 2423.48-2018?A step-by-step guide to download PDF of GB/T 2423.48-2018_EnglishStep 1: Visit website https://www.ChineseStandard.net (Pay in USD), or https://www.ChineseStandard.us (Pay in any currencies such as Euro, KRW, JPY, AUD).Step 2: Search keyword "GB/T 2423.48-2018". Step 3: Click "Add to Cart". If multiple PDFs are required, repeat steps 2 and 3 to add up to 12 PDFs to cart. Step 4: Select payment option (Via payment agents Stripe or PayPal). Step 5: Customize Tax Invoice -- Fill up your email etc. Step 6: Click "Checkout". Step 7: Make payment by credit card, PayPal, Google Pay etc. After the payment is completed and in 9 seconds, you will receive 2 emails attached with the purchased PDFs and PDF-invoice, respectively. Step 8: Optional -- Go to download PDF. Step 9: Optional -- Click Open/Download PDF to download PDFs and invoice. See screenshots for above steps: Steps 1~3 Steps 4~6 Step 7 Step 8 Step 9 |
