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GB/T 21231.2-2018 English PDF

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GB/T 21231.2-2018: Acoustics -- Measurement of airborne noise emitted and structure-borne vibration induced by small air-moving devices -- Part 2: Structure-borne vibration measurements
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GB/T 21231.2-2018English494 Add to Cart 4 days [Need to translate] Acoustics -- Measurement of airborne noise emitted and structure-borne vibration induced by small air-moving devices -- Part 2: Structure-borne vibration measurements Valid GB/T 21231.2-2018

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Basic data

Standard ID GB/T 21231.2-2018 (GB/T21231.2-2018)
Description (Translated English) Acoustics -- Measurement of airborne noise emitted and structure-borne vibration induced by small air-moving devices -- Part 2: Structure-borne vibration measurements
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard A59
Classification of International Standard 17.140
Word Count Estimation 26,214
Date of Issue 2018-03-15
Date of Implementation 2018-10-01
Issuing agency(ies) State Administration for Market Regulation, China National Standardization Administration

GB/T 21231.2-2018: Acoustics -- Measurement of airborne noise emitted and structure-borne vibration induced by small air-moving devices -- Part 2: Structure-borne vibration measurements


---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.
Acoustics--Measurement of airborne noise emitted and structure-borne vibration induced by small air-moving devices--Part 2. Structure-borne abrasive measurements ICS 17.140 A59 National Standards of People's Republic of China Acoustic air noise emitted by small ventilation devices and Induced structural vibration measurement Part 2. Structural Vibration Measurement Part 2. Structure-borne vibration measurementments (ISO 10302-2.2011, IDT) Published by.2018-03-15 2018-10-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China National Standardization Administration released Directory Preface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Description 2 5 Measurement uncertainty 2 6 Test fixture design and performance requirements 3 7 Installation 4 8 Ventilation operation 4 9 Instrument 5 10 Measurement Step 6 11 Test Report 8 Appendix A (informative annex) Recommended report data format 11 Appendix B (informative annex) Recommended voltage for testing variable speed operating ventilation units 15 Appendix C (Informative) Technical Specification for Vibration Levels of Ventilation Devices, Acceleration Level 16 Appendix D (Informative) Guidance for the Evaluation of Uncertainty in Measurement 17 Reference 20

Foreword

GB/T 21231 "Measurement of Airborne Noise and Structural Vibration Caused by Acoustic Small Ventilation Devices" consists of the following two parts. --- Part 1. Measurement of airborne noise; --- Part 2. Structural vibration measurements. This part is part 2 of GB/T 21231. This section was drafted in accordance with the rules given in GB/T 1.1-2009. This section uses the translation method equivalent to the use of ISO 10302-2.2011 "Acoustic small-scale ventilation device emission of air noise and structural vibration Measurement Part 2. Structural Vibration Measurement." The Chinese documents that have a consistent correspondence with the normatively quoted international documents in this section are as follows. ---GB/T 3240-1982 Frequently used frequencies in acoustic measurements (neqISO 266.1975) ---GB/T 3241-2010 Electroacoustic octave and fractional octave filters (IEC 61260.1995, MOD) ---GB/T 14412-2005 Mechanical Installation of Mechanical Vibration and Impact Accelerometers (ISO 5348.1998, IDT) ---GB/T 20485.11-2006 Vibration and Shock Sensor Calibration Methods Part 11. Laser Interferometry Absolute Calibration (ISO 16063-11.1999, IDT) ---GB/T 20485.21-2007 Vibration and shock sensor calibration method Part 21. Calibration of vibration comparison method (ISO 16063-21.2003, IDT). This section was proposed by the Chinese Academy of Sciences. This part is under the jurisdiction of the National Acoustical Standardization Technical Committee (SAC/TC17). This section was drafted by. Shenzhen Zhongya Electromechanical Industry Co., Ltd., Institute of Acoustics, Chinese Academy of Sciences, Shanghai Shenhua Acoustic Equipment Co., Ltd. Division, Tongji University, Anhui Weiwei Plastic Parts Group Co., Ltd., Beijing Labor Protection Research Institute, Changsha Aobang Environmental Protection Industrial Co., Ltd., Shanghai Jiaotong University, Zhejiang University, China Institute of Metrology, Shanghai Xinhua Net Environmental Engineering Co., Ltd., Northwestern Polytechnical University, Shanghai Environmental Science Research Institute, Dalian Tomorrow Environmental Engineering Co., Ltd. The main drafters of this section. Fang Qingchuan, Li Xiaodong, Yang Jun, Cheng Mingkun, Lu Yadong, Mao Dongxing, Yu Wuzhou, Zhang Mingfa, Hu Wencheng, Li Xiaokuan, Mo Jianyan, Li Zhiyuan, Li Jun, Jiang Weikang, Yan Guoqing, He Longbiao, Chen Kean, Wang Bing, Liu Yunfeng, Wu Daozhong, Zhou Yude, Zhu Wenying, Liu Danxiao and Xu Xin. Acoustic air noise emitted by small ventilation devices and Induced structural vibration measurement Part 2. Structural Vibration Measurement

1 Scope

This part of GB/T 21231 applies to the vibration level measurement of small ventilation devices, according to the provisions of GB/T 21231.1-2018, The installation area of the full-size test box for this type of small ventilation device is less than 0.48m×0.90m, and the installation area of the scaled-1/2 test box is less than 0.18m×0.3m. This section applies to each test box that can be installed in compliance with the provisions of GB/T 21231.1-2018, with self-supporting and inlet and outlet faces. Small ventilation devices. The procedures specified in this section specify the measurement of vibration levels caused by the common structure of small ventilation units used in information and communication equipment. Quantity method. The method specified in this part can be used to determine the vibration level of a single small ventilation unit. If the vibration level is given by a series of These data are used to determine the vibration level statistics of the series of small ventilation units.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article Pieces. For undated references, the latest version (including all amendments) applies to this document. GB/T 21231.1-2018 Acoustics Measurement of airborne noise and induced structural vibration of small ventilation installations Part 1 Points. Air Noise Measurement (ISO 10302-1.2011, IDT) ISO 266 Acoustics-Preferredfrequencies ISO 5348 Mechanical Vibration and Impact Accelerometer Mechanical Installation (Mechanicalvibrationandshock-Mechanical Mountingofaccelerometers) ISO 16063-11 Vibration and Shock Sensor Calibration Methods Part 11. Laser Interferometry Absolute Calibration (Methods for thecalibrationofvibrationandshocktransducers-Part 11.Primaryvibrationcalibrationbylaserin- Terferometry) ISO 16063-21 Calibration methods for vibration and shock sensors - Part 21. Vibration calibration for comparison with reference sensors (Methodsforcalibrationofvibrationandshocktransducers-Part 21.Vibrationcalibrationbycom- Parisontoareferencetransducer) IEC 61260 Electroacoustic octave band and fractional octave band filters (Electroacoustics-Octave-bandandfractional- Octave-bandfilters) ISO /IEC Guide 98-3 Measurement uncertainty - Part 3. Guidance for the expression of measurement uncertainty (GUM..1995) (Uncer- taintyinmeasurement-Part 3.Guidetotheexpressionofuncertaintyinmeasurement(GUM.1995))

3 Terms and definitions

The terms and definitions defined in GB/T 21231.1-2018 and the following apply to this document.

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