ISO 13473-4:2024 通过表面剖面的使用描述路面纹理 第4部分：表面剖面的三分之一倍频带光谱分析

标准编号：ISO 13473-4:2024

中文名称：通过表面剖面的使用描述路面纹理 第4部分：表面剖面的三分之一倍频带光谱分析

英文名称：Characterization of pavement texture by use of surface profiles — Part 4: One third octave band spectral analysis of surface profiles

发布日期：2024-04

标准范围

本文件描述了可用于执行路面表面轮廓光谱分析的方法。它规定了一种用于执行二维表面轮廓的空间频率分析（或纹理波长分析）的方法，该二维表面轮廓将路面纹理振幅描述为沿着路面上的直线或曲线轨迹的距离的函数。它还详细描述了获得这些光谱的替代(非优选)方法:A）？通过数字滤波（标准方法）获得的恒定百分比带宽；b）？通过离散傅立叶变换（DFT）进行恒定窄带宽频率分析，然后将窄带频谱转换为倍频程或三分之一倍频程频谱（信息丰富）。频率分析的结果将是恒定的空间频率（或纹理波长）光谱-八度或三分之一八度带宽的百分比带宽。本文件的目的是标准化路面表面轮廓的光谱特征。通过为那些参与路面表征但不熟悉随机信号频率分析的一般原理的人提供分析方法和相关要求的详细描述来实现这一目标。这些方法和要求一般适用于所有类型的随机信号；然而，本文详细阐述了它们在路面轮廓分析中的应用。笔记？本文件中规定的光谱分析不能表达所研究表面轮廓的所有特征。特别地，轮廓不对称的影响，例如。g.“正”和“负”轮廓的某些功能质量的差异不能用功率谱密度来表示，因为它忽略了信号的任何不对称性（见附件？B）.

This document describes the methods that are available to perform a spectral analysis of a pavement surface profile. It specifies a method for performing spatial frequency analysis (or texture wavelength analysis) of two-dimensional surface profiles that describe the pavement texture amplitude as a function of the distance along a straight or curved trajectory over the pavement. It also details an alternative (non-preferred) method to obtain these spectra:

a)       constant-percentage bandwidth obtained by digital filtering (normative method);

b)       constant narrow bandwidth frequency analysis by means of discrete Fourier transform (DFT), followed by a transformation of the narrow-band spectrum to an octave- or one-third-octave-band spectrum (informative).

The result of the frequency analysis will be a spatial frequency (or texture wavelength) spectrum in constant-percentage bandwidth bands of octave or one-third-octave bandwidth.

The objective of this document is to standardize the spectral characterization of pavement surface profiles. This objective is pursued by providing a detailed description of the analysis methods and related requirements for those who are involved in pavement characterization but are not familiar with general principles of frequency analysis of random signals. These methods and requirements are generally applicable to all types of random signals; however, they are elaborated in this document for their use in pavement surface profile analysis.

NOTE            The spectral analysis as specified in this document cannot express all characteristics of the surface profile under study. In particular, the effects of asymmetry of the profile, e.g. the difference of certain functional qualities for “positive” and “negative” profiles cannot be expressed by the power spectral density, as it disregards any asymmetry of the signal (see Annex B).

标准预览图