GB/T 22157-2018Acoustics -- Specification of test tracks for measuring noise emitted by road vehicles and their tyres (English PDF)

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This standard replaces GB/T 22157-2008 "Technical Specification for Acoustic Test Lanes for Measuring Road Vehicle Emission Noise".

Compared with GB/T 22157-2008, the main technical changes of this standard are as follows.

--- Based on the original standard requiring the use of pure asphalt, the use of polymer modified asphalt (see 4.3);

--- The specific flatness test method is clearly defined (see 5.1);

--- The original standard uses the sanding method to measure the average structural depth (MeanTextureDepth, MTD) as a structural depth indicator, instead

Measure the average section depth (MeanProfileDepth, MPD) (see 5.2.1);

--- Further specification of the measurement and representation of sound absorption (see 5.3).

This standard uses the translation method equivalent to the ISO 10844.2014 "acoustic test vehicle technology for measuring road vehicles and tire noise.

Specifications.

The documents of our country that have a consistent correspondence with the international documents referenced in this standard are as follows.

---GB 1495-2002 Vehicle acceleration noise limits and measurement methods (ISO 362.1998).

This standard has made the following editorial changes.

--- According to the application of engineering in China, 3.7 has increased the note (see 3.7 note 2);

--- Added an example of China's test lane engineering (see Appendix NA);

--- Appendix A, formula (A.2), (A.3) for calculating the ENDT (expectedpass-bynoiseleveldifference) indicator

The original texts (A.6) and (A.10) were incorrect and revised (see Appendix A).

This standard was proposed by the Chinese Academy of Sciences.

This standard is under the jurisdiction of the National Acoustic Standardization Technical Committee (SAC/TC17).

This standard was drafted. Institute of Acoustics, Chinese Academy of Sciences, Highway Science Research Institute of the Ministry of Transport, Yixing City product quality supervision and inspection

Institute, Tongji University, Beijing Labor Protection Science Research Institute, Zhejiang University, Shanghai Jiaotong University, Shanghai Academy of Environmental Sciences, China Metrology

Institute of Science, Anhui Vocational and Technical College, Hefei University of Technology.

Introduction

In general, pavement construction and sound absorption characteristics are the main factors affecting vehicle noise. At the same time, the mechanical resistance and slip resistance of the pavement surface layer

Can also affect the noise measurement results.

In order to reduce the variation of tire/road noise and vehicle emission noise values measured at different locations, it is necessary to specify relevant road surface characteristics.

Advice on the material, design and construction of the test pavement.

The primary purpose of this standard is to revise the pavement specification to improve measurement repeatability.

In the design method of this standard, the test lane complying with this standard is compatible with GB/T 22157-2008, but the characteristics are reduced.

Variability.

It should be noted that the test of different sites should have high repeatability, and the pavement design should not only reduce the road noise of the tires between the test sites.

The changes should also ensure that noise propagation is not affected by the pavement used. The consideration of the latter should exclude the use of non-density with sound absorption performance on the road surface.

Grading roads and other related types of pavements.

This revision includes more roadway specification constraints and recommendations for test lane construction and maintenance methods. The basic characteristics of the road surface

Seek to remain unchanged.

Users of this standard are encouraged to measure ENDT and transmit the data to ISO /TC43/SC1 for the next periodic review.

Analyze before the trial.

In addition, this standard recommends a non-destructive test method for periodic inspection of pavement characteristics.

Acoustic measurement of road vehicles and tire noise

Test lane specification

1 Scope

This standard specifies the basic characteristics of the test pavement used to measure vehicle and tire/road noise.

The pavement design given in this standard.

--- Can guarantee a variety of tire/road noise propagation under different working conditions (including those suitable for vehicle noise testing)

To be sexual

--- Can minimize the difference between the venues;

--- Only weak sound absorption for vehicle noise sources;

--- Consistent with the practical application of road construction.

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 edition (including all amendments) applies to this document.

ISO 362-1 - Road vehicles - Accelerated noise - Methods of measurement - Part 1 . Type 1 and

ofnoiseemittedbyacceleratingroadvehicles-Engineeringmethod-Part 1.MandNCategories)

ISO 13472-2 - Measurement of noise absorption performance - Part 2.

(Acoustics-measurementofsoundabsorptionpropertiesofroadsurfacesinsitu-Part 2.Spotmeth-

Odforreflectivesurfaces)

ISO 13473-1 - Determination of pavement structure by surface appearance - Part 1 . Determination of average profile depth (Characterization of

Pavementtexturebyuseofsurfaceprofiles-Part 1.Determinationofmeanprofiledepth)

ISO 13473-3 - Characterization of pavement structures using surface appearance - Part 3. Specification and classification of profilometers

(Characterizationofpavementtexturebyuseofsurfaceprofiles-Part 3.specificationandclassifica-

Tionofprofilometers)

ISO /T S13473-4 Characterization of pavement structures using surface appearance - Part 4. Spectrometric analysis of surface contours (Characterization

ofpavementtexturebyuseofsurfaceprofiles-Part 4.SpectralanalysisofSurfaceprofiles)

EN13036-7 Test methods for surface characteristics of roads and airports - Part 7. Measurement of unevenness of pavement layer. ruler test (Road

andairfieldsurfacecharacteristics-Testmethods-Part 7.Irregularitymeasurementofpavement

Courses.Thestraightedgetest)

3 Terms and definitions

The following terms and definitions apply to this document.

3.1

Sound absorption coefficient

The ratio of the acoustic power absorbed by the plane wave incident perpendicularly to the object under test to the incident power.

Note. expressed as a percentage, called sound absorption.

3.2

Road profile surfaceprofile

3.2.1

Construction section textureprofile

When a sensor, such as a needle or laser spot, moves continuously or illuminates the road while moving along a line along the road

Two-dimensional sampling of the pavement texture produced.

Note. The construction section uses two coordinate descriptions. one coordinate is called "distance" (abscissa) along the road surface direction, and the other coordinate is located in the vertical direction of the road surface.

Called "amplitude" (ordinate).

3.2.2

Irregularity

When the flat ruler is placed perpendicular to the road surface, the maximum distance between the two sides of the road between the contacts and the flat measuring edge is measured.

Note 1. When the structural depth is greater than 0.5m, the pavement depth is different from the pavement characteristics. This standard refers to the unevenness.

Note 2. See Figure C.1.

3.2.2.1

Longitudinal irregularity

Test the unevenness of the longitudinal axis of the lane.

3.2.2.2

Transverse irregularity transversalirregularity

The unevenness of the test lane perpendicular to the longitudinal axis.

3.2.3

Flat feet straightedge

A device used to measure the distance from a plane.

3.2.4

Large construction megatexture

The deviation of the longitudinal section of the road surface with the characteristic dimension of the road surface from 50mm to 500mm with respect to the ideal plane corresponds to 1/3 octave

Contains a wavelength range from 63mm to 500mm center wavelength.

Note. For the pavement structure in this wavelength range, the amplitude between the peaks is usually 0.1mm~50mm, and the size of the wavelength is the same as the size of the ground contact area of the tire.

Levels are generally caused by damage to the road surface such as pits or crowds. This configuration is often an undesirable feature of a disease in the road surface.

The roughness of the road surface is called the unevenness when it is larger than the wavelength of the large structure.

3.2.5

Macroscopic construction macrotexture

The deviation of the longitudinal profile of the road surface along the road surface from 0.5mm to 50mm with respect to the ideal plane corresponds to 1/3 octave

Contains a wavelength range from 0.63mm to 50mm center wavelength.

Note. For the pavement structure in this wavelength range, the amplitude between the peaks is usually 0.1mm~20mm, and the size of the wavelength is the same as the size of the tread pattern.

do not. Pavement design usually maintains sufficient macrostructure to meet the needs of road surface drainage. The macrostructure is through the right aggregate and sand in the mix

The proportion of pulp or road surface treatment technology is controlled.

3.2.6

Microstructure microtexture

Deviation of the longitudinal profile of the road surface with a feature size of less than 0.5 mm along the road surface relative to the ideal plane, corresponding to 1/3 octave

The wavelength range of the heart wavelength is less than or equal to 0.5 mm.

3.3

Vertical slope and gradient slope gradientandcrossfal

3.3.1

Gradient gradient

The ratio of the height difference to the length measured along the longitudinal axis of the lane is expressed as a percentage.

3.3.2

Cross slope

The ratio of the height difference to the length measured along the transverse axis of the lane is expressed as a percentage.

3.4

Propagation area propagationarea

The part of the test lane on both sides of the driveway.

Note. See Figure 1.

3.5

Driving lane drivelane

The part of the test lane where the vehicle is traveling.

3.6

Stiffness stiffness

The ratio of the normal force to the resulting displacement.

3.7

Dense asphalt concrete denseasphaltconcrete

The continuous graded aggregate particles form an interlocking structure of asphalt.

Note 1. See EN13108-1.

Note 2. According to JTGF40-2004, China is called dense grade asphalt mixture Dense-gradedbituminousmixtures (English), Dense-gradedas-

Phaltmixtures (beautiful).

3.8

Average section depth meanprofiledepth

The average height difference between the section and the highest level above the 100 mm long baseline.

Note. See 3.5.4 of ISO 13473-1.1997.

4 Test lane requirements

2 years a

(<=5mm)

2 years a

Construction depth

MPD

0.5mm+/-0.2mm

MPD

0.5mm+/-0.2mm

2 years a

Sound absorption coefficient

(8% max)

(10% max)

(8% max)

4 years a

Gradation curve sqrt - - -

Note. sqrt should be checked; - not applicable.

a Cycle length.

5 Measurement methods and data processing

6 Test report

The test report for each road surface should include all the information required for construction permit or cycle inspection.

E.g.

a) General information.

---owner;

---The name of the contractor;

---The construction date of the test driveway;

---The location of the test lane;

--- Inspection organization (if any);

---Detecting institution qualification status;

---The main use of the test drive (such as truck tire test, car pass);

--- Significant features (such as fever).

b) Size and layout.

1) Size.

i) Size of the driving lane.

---Total length (m);

---Width (m);

---la(m);

---ls(m).

i) Propagation area size.

--- Length (m);

---Width (m).

Ii) Air direction.

---radius (m);

---Salient features.

2) Layout.

i) Driving lane.

--- Horizontal and vertical unevenness (m);

--- Deviation (%) with respect to the horizontal plane.

i) Communication area.

--- unevenness (m);

---Vertical slope (%);

--- Step or discontinuity (m).

c) Pavement characteristics.

1) Material.

i) Driving lane.

--- Sound absorption coefficient;

---Maximum nominal particle size;

--- wear layer thickness;

--- Construction depth;

--- screening curve;

--- Elastic material.

i) Communication area.

--- Sound absorption coefficient.

2) Uniformity of pavement characteristics.

d) Proof of the requirements.

--- Measurement point layout sketch;

---Measure material description;

--- Description of measurement methods.

e) Uniformity of pavement characteristics.

7 country examples

Appendix C gives the production process for the test lanes in different countries.

8 Major improvements compared to GB/T 22157-2008

Appendix D gives the improvement of this standard to the previous edition (GB/T 22157-2008).

Appendix A

(informative appendix)

Calculate the expected pass noise level difference (ENDT) caused by the difference in pavement structure

A.1 Overview

ENDT is a single-valued evaluation that provides an estimate of the dB(A) total noise level change caused by structural depth changes relative to the reference pavement.

the amount. The reference pavement is characterized by a 1/3 octave structure distribution spectrum Ltx, ref, lambda (which is a function of the construction wavelength lambda) and is composed of a 1/3 octave noise spectrum.

Lmi representation (a function of frequency f).

The ENDT is estimated by using the 1/3 octave structure distribution spectrum Ltx, lambda of the lane to be tested. It includes two tire road noises

Me...