GB/T 4797.9-2021 English PDF

US$344.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 4797.9-2021: Classification of environmental conditions - Environmental conditions appearing in nature - Measured shock and vibration data during storage, transportation and in-use
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 4797.9-2021	344	Add to Cart	4 days	Classification of environmental conditions - Environmental conditions appearing in nature - Measured shock and vibration data during storage, transportation and in-use	Valid

Similar standards

GB/T 14092.1   GB/T 14092.2   GB/T 4798.2   GB/T 4797.3   GB/T 4797.4   GB/T 4797.1   

Basic data

Standard ID: GB/T 4797.9-2021 (GB/T4797.9-2021)
Description (Translated English): Classification of environmental conditions - Environmental conditions appearing in nature - Measured shock and vibration data during storage, transportation and in-use
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: A21
Word Count Estimation: 18,17
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 4797.9-2021: Classification of environmental conditions - Environmental conditions appearing in nature - Measured shock and vibration data during storage, transportation and in-use

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Classification of environmental conditions - Environmental conditions appearing in nature - Measured shock and vibration data during storage, transportation and in-use ICS 19.040 A21 National Standards of People's Republic of China Classification of environmental conditions The shock and impact measured during storage, transportation and use Vibration data (IEC 60721-2-9.2014, Classificationofenvironmentalconditions- Released on 2021-03-09 Implemented on 2021-10-01 State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee

Table of contents

Foreword Ⅲ Introduction Ⅳ 1 Scope and purpose 1 2 Normative references 1 3 General 1 4 Shock and vibration data 3 5 Method description 3 Appendix A (informative appendix) Case 7 Appendix B (informative appendix) Smoothing and envelope method of environmental description spectrum 9 Reference 13 Figure A.1 Comparison of curves 1-5, envelope 7 and 95/50NTL curve 6 8 Figure B.1 95/50NTL envelope of data 9 Figure B.2 95/50NTL envelope data, including 1/3 octave average data 10 Figure B.3 Standard slope 1/3 octave average 11 Figure B.4 Comparison of envelope curve and NTL curve (including different normal tolerance factors C) 12 Table 1 Normal tolerance factor C 4 Table A.1 Examples of 5 hypothetical random vibration curves 7 Table A.2 Calculation results of 5 hypothetical curves 8

Foreword

GB/T 4797 includes the following parts. ---GB/T 4797.1 Classification of environmental conditions, natural environmental conditions, temperature and humidity; ---GB/T 4797.2 Classification of environmental conditions, natural environmental conditions, atmospheric pressure; ---GB/T 4797.3 electrical and electronic products natural environmental conditions biological; ---GB/T 4797.4 Classification of environmental conditions, natural environmental conditions, solar radiation and temperature; ---GB/T 4797.5 Classification of environmental conditions, natural environmental conditions, precipitation and wind; ---GB/T 4797.6 Environmental condition classification natural environmental conditions dust, sand, salt fog; ---GB/T 4797.7 Classification of environmental conditions for electrical and electronic products, natural environmental conditions, earthquake vibration and shock; ---GB/T 4797.9 Classification of environmental conditions Shock and vibration measured during storage, transportation and use of natural environmental conditions data. This part is Part 9 of GB/T 4797. This section was drafted in accordance with the rules given in GB/T 1.1-2009. The translation method used in this part is equivalent to the IEC 60721-2-9.2014 "Environmental Condition Classification Part 2-9.Measurement of Natural Environmental Conditions" Storage, transportation and use of large amounts of shock and vibration data. This section has made the following editorial changes. ---In order to be consistent with my country's standard system, the name of the standard was changed to "Environmental Condition Classification, Storage, Transportation and Use of Natural Environmental Conditions" Shock and vibration data measured in the process". This part is proposed and managed by the National Standardization Technical Committee on Environmental Conditions and Environmental Tests for Electrical and Electronic Products (SAC/TC8). Drafting organizations of this section. Wuhu Saibao Information Industry Technology Research Institute Co., Ltd., Chongqing Saibao Industrial Technology Research Institute, Industry and Information Technology The Fifth Institute of Electronics of the Ministry of Chemical Industry, Shenzhen Youruite Testing Technology Co., Ltd., Beijing University of Aeronautics and Astronautics, Anhui University of Technology, Tianjin Aerospace Rui Lai Technology Co., Ltd., Xi'an Guangqi Technology Co., Ltd., Xi'an Jiesheng Electronic Technology Co., Ltd., Guangjiayuan Weikai (Shanghai) Testing Technology Technology Co., Ltd., Great Wall Motor Co., Ltd., Guangzhou Saibao Tengrui Information Technology Co., Ltd., Shanghai Artec Testing Technology Co., Ltd., Xi'an Rongjun General Standardization Research Institute Co., Ltd. The main drafters of this section. Hou Weiguo, Yang Chuan, Ji Chunyang, Mei Liguang, Wu Sa, Ye Jianhua, Yu Xiaoliu, Gao Wenbin, Bai Xigang, Xu Mingge, Shen Xiaoyuan, Cui Zhantuan, Wu Huan, Yu Tiangang, Yang Peng, Yan Tingting, Wang Miao, Shi Xiaowen, Xin Rong.

Introduction

This part of GB/T 4797 aims to provide a strategy for The data measured during the use of the protective field is used to formulate the environmental profile. The measured data is usually recorded in the form of acceleration-time history. Afterwards from IEC 60068-2 series [1] Select appropriate severity of vibration and shock test methods, apply the environmental level given in IEC 60721-3 [2], and Update the environmental level according to the strategy described in this section. More detailed information can be obtained from professional literature. References list some of the materials. Classification of environmental conditions The shock and impact measured during storage, transportation and use Vibration data

1 Scope and purpose

This part of GB/T 4797 aims to provide a strategy to develop an environmental profile based on the data measured during the product life cycle. Its purpose is to define the basic parameters and values of shock and vibration, as a process to determine the storage, transportation and use of the product during its life cycle It is expected to withstand the harshness of the mechanical environment.

2 Normative references

The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article Pieces. For undated reference documents, the latest version (including all amendments) is applicable to this document. no.

3 General

3.1 Overview The shock and vibration signals measured on storage, transportation platforms, and locations of use vary from basic sinusoidal characteristics to purely random characteristics. The random signal may be normally distributed or non-normally distributed. If the latter is the case, it is reasonable to assume that the process is The formula mixes the superposition of normally distributed random signals of different amplitudes. The real environment can rarely be simply classified as a sinusoidal vibration environment. Generally, it is related to discrete excitations such as rotating machinery, aeroengines, and propellers. The excitation mechanism is related and mixed with the related random vibration process. Product-related specifications need to clarify whether only random vibration tests or Conduct a mixed mode experiment. The shock environment is closely related to the vibration environment at each stage of the product life cycle. Acceleration. If the packaged product is firmly fixed on the base of the transportation platform during transportation, the packaged product will not "jump", usually these The frequency contained in the impact signal is within a bandwidth of 0 Hz to.200 Hz. Of course, higher frequencies (maybe in the kHz range) may appear during use. Surrounding), it also depends on the actual use environment. In view of the fact that random vibration test is the most common test method, the treatment method of random vibration environment is given below. Based on stochastic process The processing method can represent other processes, for example, the processing of the shock response spectrum in the shock environment, and the processing of the acceleration spectral density (ASD). It is also suitable for processing sinusoidal data in the form of acceleration-frequency. However, special attention needs to be paid to these data depending on the initial The process is the discrete value of acceleration value, root mean square value or abnormal frequency. Other factors to consider in this process include. a) The factors of the random spectrum may depend on the ultimate purpose of the test, such as robustness, appraisal level, etc.; b) Statistical characteristics of the environment; c) The statistical characteristics of the product; d) Time-life cycle profile. This article introduces some typical characteristics of the product during the storage, transportation and use stages. ......

Image     

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 4797.9-2021_English be delivered?

Answer: Upon your order, we will start to translate GB/T 4797.9-2021_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 4797.9-2021_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 4797.9-2021_English will be deemed to be sold to your employer/organization who actually pays 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+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.