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GB 11871-2009 English PDF

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GB 11871-2009: Limits of airborne noise emitted by marine diesel engines
Status: Valid

GB 11871: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB 11871-2009English149 Add to Cart 2 days [Need to translate] Limits of airborne noise emitted by marine diesel engines Valid GB 11871-2009
GB 11871-1989English199 Add to Cart 2 days [Need to translate] Limits of airborne noise emitted by marine diesel engines Obsolete GB 11871-1989

PDF similar to GB 11871-2009


Standard similar to GB 11871-2009

GB/T 37452   CB/T 4197   GB/T 11865   GB/T 43122   GB/T 43123   GB/T 42328   

Basic data

Standard ID GB 11871-2009 (GB11871-2009)
Description (Translated English) Limits of airborne noise emitted by marine diesel engines
Sector / Industry National Standard
Classification of Chinese Standard U44
Classification of International Standard 47.020.20
Word Count Estimation 4,410
Date of Issue 2009-03-09
Date of Implementation 2009-08-01
Older Standard (superseded by this standard) GB 11871-1989
Quoted Standard GB/T 9911
Regulation (derived from) Announcement of Newly Approved National Standards No. 2 of 2009 (total 142)
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary This Chinese standard specifies the marine diesel engine bench test of radiation in the air noise A-weighted sound power level limits. This standard applies to marine diesel bench.

GB 11871-2009: Limits of airborne noise emitted by marine diesel engines

---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.
Limits of airborne noise emitted by marine diesel engines ICS 47.020.20 U44 National Standards of People's Republic of China Replacing GB 11871-1989 Noise limits for marine diesel engine air radiation Posted 2009-03-09 2009-08-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

Chapter 3 of this standard are mandatory, the rest are recommended. This standard replaces GB 11871-1989 "marine diesel engines emitted airborne noise limits." The main technical differences between standard compared with GB 11871-1989 are as follows. --- Noise limit is given by the table method to the formula, and the value is changed from the nearest whole number to the nearest decimal place; --- For marine diesel engines emitted airborne noise limits have been fixed. The standard proposed by China Shipbuilding Industry Corporation. This standard by the National Standardization Technical Committee diesel marine machinery Technical Committee. This standard was drafted. China Shipbuilding Industry Corporation seventh eleven Institute. The main drafters of this standard. Hanyan Min, Zhu Zhenhai, Ji Wen, Herring, Tao Longhai. This standard replaces the standards previously issued as follows. --- GB 11871-1989. Noise limits for marine diesel engine air radiation

1 Scope

This standard specifies the marine diesel engine air radiated noise in the bench when A sound power level limits. This standard applies to marine diesel engine test bed.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. Air noise measurement method GB/T 9911 marine diesel engine radiation

3 noise limits

3.1 formula Marine diesel engine air radiated noise at rated power and rated speed A LW sound power level should be less than the formula (1) Calculated Numerical calculation results are accurate to one decimal place. LW = 10lg (like r · Pr) + C (1) Where. LW --- air calibration conditions of radiation noise A sound power level limit in decibels [dB (A)]; R --- like calibration value speed, in revolutions per minute (r/min); Pr --- power calibration value, expressed in kilowatts (kW); C --- constant decibels [dB (A)]. When Pr < 736kW, C = 62.0. When Pr≥736kW, C = 64.1 (Like r≤300r/min); or C = 63.0 (like r > 300r/min). 3.2 Measurement Methods This standard applies to the measurement method executed by GB/T 9911 law specified in the project. If the environmental conditions are not met the test of acoustic engineering Requirements law, agreed by both parties also executed according to GB/T 9911 stipulated quasi-engineering method, it should be described in the test report.

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