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GB/T 7031-2025 English PDF

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GB/T 7031-2025: Mechanical vibration - Road surface profiles - Reporting of measured data
Status: Valid

GB/T 7031: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 7031-2025English844 Add to Cart 6 days [Need to translate] Mechanical vibration - Road surface profiles - Reporting of measured data Valid GB/T 7031-2025
GB/T 7031-2005English734 Add to Cart 4 days [Need to translate] Mechanical vibration -- Road surface profiles -- Reporting of measured data Valid GB/T 7031-2005
GB/T 7031-1986English439 Add to Cart 4 days [Need to translate] Vehicle vibration--Describing method for road surface irregularity Obsolete GB/T 7031-1986

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Basic data

Standard ID GB/T 7031-2025 (GB/T7031-2025)
Description (Translated English) Mechanical vibration - Road surface profiles - Reporting of measured data
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard J04
Classification of International Standard 17.160
Word Count Estimation 42,444
Date of Issue 2025-08-01
Date of Implementation 2026-02-01
Older Standard (superseded by this standard) GB/T 7031-2005
Issuing agency(ies) State Administration for Market Regulation, Standardization Administration of China

GB/T 7031-2025: Mechanical vibration - Road surface profiles - Reporting of measured data

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ICS 17.160 CCSJ04 National Standard of the People's Republic of China Replaces GB/T 7031-2005 Report on Mechanical Vibration Road Pavement Spectrum Measurement Data (ISO 8608.2016, IDT) Released on August 1, 2025 Implementation on February 1, 2026 State Administration for Market Regulation The National Standardization Administration issued

Table of Contents

Preface III Introduction V 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Symbols 2 5 Report Type 2 5.1 Single wheel track data 2 5.2 Multi-track data 6 5.3 Report 6 Appendix A (Informative) Report Example 9 Appendix B (Informative) Fitting of Road Spectrum Characteristics and Power Spectral Density 15 Appendix C (Informative) General Guidelines for Describing Road Spectra Using Statistical Parameters 18 Appendix D (Informative) Power Spectral Density Processing and Accuracy Considerations 27 Reference 32 Preface This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting. This document replaces GB/T 7031-2005 "Mechanical Vibration Road Pavement Spectrum Measurement Data Report" and is consistent with GB/T 7031-2005. In addition to structural adjustments and editorial changes, the main technical changes are as follows. --- Deleted the symbols "s" and "λ" and related information in Table 1 (see Table 1 of GB/T 7031-2005); --- Change the symbol "y2" in Table 1 to "γ2" (see Table 1, Table 1 of GB/T 7031-2005); --- Added the symbol "σ2" and related information in Table 1 (see Table 1); --- Added "INT is integer function" (see 5.1.2); --- Change “IEC 1260” to “IEC 61260-1” (see 5.3.4.2.1, 5.3.3.2.1 of GB/T 7031-2005); --- Added "(for example, see ISO 22476-1, ISO 22476-3)" (see 5.3.5.3.2); --- Change "wherein, photos omitted" to "wherein, measurement system description and photos omitted" (see A.1, GB/T 7031-2005 Appendix A); --- Added the notes to Table B.1 (see B.2); --- Added the text content in C.1."Assume that the exponent of the fitted PSD is w = 2, so that the velocity PSD is constant" (see C.1); --- Deleted the symbol "λ" and related information in Table C.1 (see Table C.1 of GB/T 7031-2005); --- Added the symbol "L" and related information in Table D.1 (see Table D.1); --- Change "L" in the text of paragraph 2 of D.6.1 to "block size L" (record length) (see D.6.1, GB/T 7031-2005 D.6.1); --- Change "Figure D.2 shows the relationship between the regularized standard error, frequency resolution, block length and total signal length" to "Figure D.2 shows the relationship between the normalized standard error (random error), skewness error and frequency resolution" (see D.7.2, D.7.2 of GB/T 7031-2005). This document is equivalent to ISO 8608.2016 "Reporting of mechanical vibration spectrum measurement data for road pavement surfaces". The following minimal editorial changes have been made to this document. --- Added the titles "5.1.1.1 General", "5.1.1.4 Relationship between the two reporting formats", "5.3.1 General", and "A.1 General". “B.1 General”, “C.1 General”, “C.6.1 General”, “D.6.2.1 General”; --- The general characteristics and octave characteristics of Figures A.3 and A.5 are given in Table A.1, and the road descriptions in Figures A.2 to A.5 are given in Table A.1. Note given in; --- Adjust the description content in Figure A.2, Figure A.3, Figure A.4, Figure A.5, Figure C.1, Figure C.2, Figure D.1 and Figure D.2 to index symbols illustrate; --- The structures of Table B.2, Table C.2, Table C.3 and Table C.4 have been adjusted, and the sub-tables have been merged into one table. Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document is proposed and coordinated by the National Technical Committee for Standardization of Mechanical Vibration, Shock and Condition Monitoring (SAC/TC53). This document was drafted by. China Machinery Engineering Corporation Zhengzhou Machinery Research Institute Co., Ltd., Huadian Electric Power Research Institute Co., Ltd., Beijing Machinery Industry Automation Research Institute Co., Ltd., China Academy of Railway Sciences Group Co., Ltd. Energy Conservation, Environmental Protection and Labor Health Research Institute, Guizhou Transportation Tong Vocational and Technical College, Zhonglu High-Tech Traffic Inspection and Certification Co., Ltd., China Railway Seventh Bureau Group Third Engineering Co., Ltd., Changda Municipal Engineering Co., Ltd. Engineering (Guangdong) Co., Ltd., China Railway 20th Bureau Group Fourth Engineering Co., Ltd., China Communications Construction Road and Bridge Northern Engineering Co., Ltd., China Railway 23rd Bureau Group The Third Engineering Co., Ltd. of the China Railway Seventh Bureau Group Xi'an Railway Engineering Co., Ltd., China Railway Construction Bridge Engineering Bureau Group Co., Ltd., China Railway Greater Bay Area Construction Co., Ltd., China Railway 19th Bureau Group Co., Ltd., Sichuan Gaolu Information Technology Co., Ltd., China Railway 6th Bureau Group Co., Ltd. Company, the Chinese People's Liberation Army Armored Forces Academy, and Henan Jiuyu Enpai Electric Power Technology Co., Ltd. The main drafters of this document are. Ma Weiping, Dou Lisha, Bing Hankun, Liu Zengyuan, Sun Chenglong, Wang Huamin, Su Jian, Li Yulong, Tang Lingwei, Zhang Lijun, Huang Zengcai, Chen Wenping, Wang Tao, Zhang Zhiwei, Liu Yuanhui, Guo Jianfei, other group schools, Li Xingyu, Liu Guoqiang, Zhao Xiao, Hao Jinxin, Geng Qingjun, Mao Lijian, Sun Pan, Tan Hui, Yin Shengguang, Zhang Lianbing, Liang Liang, Li Xiaofei, Feng Fuzhou, and Zhang Yingshuai. The previous versions of this document and the documents it replaces are as follows. ---First published in 1986 as GB/T 7031-1986 "Method for expressing road surface flatness based on vehicle vibration input"; ---First revised in.2005 as GB/T 7031-2005 "Mechanical Vibration Road Pavement Spectrum Measurement Data Report"; ---This is the second revision.

introduction

The purpose of this document is to facilitate the compilation and comparison of vertical road profile measurement data of various road surfaces. The method is applicable to single wheel track or multi-wheel track road spectrum measurement. This document specifies how to prepare a measurement report rather than how to perform the measurement. The measuring instrument may affect the measurement results and should be The report describes the characteristics of the measurement system. Appendix A. provides an example of a report that meets the minimum requirements of this document. Appendix B. In order to conveniently classify the road spectrum according to the conventional classification, the approximate classification method of typical roads is given, and the conventional road Classification, a curve fitting method for characterizing spectral data is proposed. Appendix C provides general guidelines for describing road profiles using statistical parameters. Proposed research or other related research, such as vehicle comfort, suspension, and road spectrum evaluation. Appendix D. Discusses the use of Fast Fourier Transform (FFT) techniques to process Power Spectral Density (PSD), and also discusses statistical accuracy. question. Report on Mechanical Vibration Road Pavement Spectrum Measurement Data 1 Scope This document specifies a unified method for reporting vertical track profile data, applicable to single or multiple wheel track track profile measurements. This document is applicable to vertical road spectrum data measurement reports for highways, streets, expressways and off-road roads, and is not applicable to railways. Includes equipment and methods for measurement and data processing. 2 Normative references The contents of the following documents constitute the essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. IEC 61260-1 Electroacoustics - Octave-band filters - Part 1.Specifications andfractional-octave-bandfilters-Part 1.Specifications) Note. GB/T 3241-2010 Electroacoustics Octave and fractional octave filters (IEC 61260.1995, MOD) 3 Terms and Definitions For the purposes of this document, the terms and definitions defined in ISO 2041 and the following apply. 3.1 spatial frequency The reciprocal of the wavelength. Note. Spatial frequency is expressed as the number of waves per metre (m-1). 3.2 The finite mean square value of a signal within a unit frequency range. Note. For a unilateral spectrum, the integral value of the power spectrum density function in the XY linear coordinates should be equal to the variance (σ2) of the original signal within its frequency distribution range. If only the spectrum within the frequency range of 0~∞ is counted, the spectrum value will be multiplied by 2 due to the symmetry of the spectrum. 3.3 displacementPSD displacementPSD Power spectral density of vertical displacement of the pavement. 3.4 velocity PSD velocityPSD The power spectral density of the rate of change of the vertical displacement of the road surface (the slope of the vertical displacement of the road surface) within a unit distance. 3.5 accelerationPSD The power spectral density of the rate of change of the vertical displacement slope of the road surface within a unit distance. 3.6 fading Eliminate the effects of measurement system transfer function on PSD.

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