GB/T 9911-2026 船用柴油机辐射的空气噪声测量方法

ICS47.020.20

CCSU44

中华人民共和国国家标准

GB/T9911—2026

代替GB/T9911—2018

船用柴油机辐射的空气噪声测量方法

Measurementofairbornenoiseemittedbymarinedieselengine

2026⁃09⁃28发布2027⁃04⁃01实施

国家市场监督管理总局

国家标准化管理委员会发布

GB/T9911—2026

目次

前言··························································································································Ⅲ

1范围·······················································································································1

2规范性引用文件········································································································1

3术语和定义··············································································································1

4测定的量及测量不确定度····························································································2

4.1测定的量···········································································································2

4.2测量不确定度·····································································································2

5声学测试环境···········································································································2

5.1测试环境修正·····································································································2

5.2工程法··············································································································2

5.3简易法··············································································································3

6测试仪器·················································································································3

6.1仪器精度要求·····································································································3

6.2校准·················································································································3

7柴油机安装和运转条件·······························································································3

7.1安装条件···········································································································3

7.2运转条件···········································································································3

8声压级测量··············································································································3

8.1基准体··············································································································3

8.2测量表面···········································································································4

8.3测量距离···········································································································4

8.4测点位置···········································································································4

8.5测量·················································································································7

9测量表面平均声压级和声功率级计算·············································································7

9.1背景噪声修正·····································································································7

9.2测量表面时间平均声压级的计算·············································································8

9.3声功率级的计算··································································································8

10测试报告···············································································································9

附录A（规范性）测试环境的鉴定方法············································································10

A.1概述···············································································································10

A.2环境条件·········································································································10

A.310

试验车间环境修正值K2的求法·············································································

Ⅰ

GB/T9911—2026

前言

本文件按照GB/T1.1—2020《标准化工作导则第1部分：标准化文件的结构和起草规则》的规定

起草。

本文件代替GB/T9911—2018《船用柴油机辐射的空气噪声测量方法》，与GB/T9911—2018相

比，除结构调整和编辑性改动外，主要技术变化如下：

——更改了适用范围（见第1章，2018年版的第1章）；

——增加了术语“声压级”（见3.1）；

——更改了简易法测定的量（见4.1，2018年版的4.1）；

——增加了简易法两种声功率级测量不确定度的适用条件（见表1，2018年版的表1）；

——更改了声级计要求及对应测量要求（见6.1和8.5.2，2018年版的6.1和8.5.2）；

——更改了测量校准的评价方法（见6.2.1，2018年版的6.2.1）；

——更改了测量仪器的校准周期（见6.2.2，2018年版的6.2.2）；

——更改了被测柴油机基准体尺寸和测点规定（见表2，2018年版的表2）；

——增加了柴油机运转时测点声压级背景噪声修正计算公式和背景噪声修正值K1的计算公式

（见9.1）；

——增加了测试环境吸声量估算法的适用条件，更改了“平均吸声系数α的近似值表”（见A.3.3

和表A.1，2018年版的A.3.3和表A.1）；

——删除了测试环境鉴定的合格要求（见2018年版的A.4）。

请注意本文件的某些内容可能涉及专利。本文件的发布机构不承担识别专利的责任。

本文件由全国船用机械标准化技术委员会（SAC/TC137）提出并归口。

本文件起草单位：中国船舶集团有限公司第七一一研究所。

本文件主要起草人：朱晓健、刘媛、童宗鹏、肖英龙、吕佩瑶、蒋吕。

本文件于1988年首次发布，2009年第一次修订，2018年第二次修订，本次为第三次修订。

Ⅲ

GB/T9911—2026

船用柴油机辐射的空气噪声测量方法

1范围

本文件描述了船用柴油机（以下简称“柴油机”）在规定的稳态工况运转时，在包络柴油机的假想矩

形六面体测量表面上测量噪声声压级和确定噪声声功率级的工程法和简易法。

本文件适用于柴油机台架试验时辐射的空气噪声测量。其他燃料内燃机参照本文件执行。

2规范性引用文件

下列文件中的内容通过文中的规范性引用而构成本文件必不可少的条款。其中，注日期的引用文

件，仅该日期对应的版本适用于本文件；不注日期的引用文件，其最新版本（包括所有的修改单）适用于

本文件。

GB/T3241电声学倍频程和分数倍频程滤波器

GB/T3785.1电声学声级计第1部分：规范

GB/T3947声学名词术语

GB/T4129声学用于声功率级测定的标准声源的性能与校准要求

GB/T15173电声学声校准器

CB/T3253船用柴油机技术条件

CB/T3254.2船用柴油机台架试验第2部分：试验方法

3术语和定义

GB/T3947界定的以及下列术语和定义适用于本文件。

3.1

声压级soundpressurelevel

声压与基准声压之比的以10为底的对数乘以20。

注1：单位为分贝（dB）。

注2：基准声压为20μPa。

3.2

声功率级soundpowerlevel

声功率与基准声功率之比的以10为底的对数乘以10。

注1：单位为分贝（dB）。

注2：基准声功率为1pW。

3.3

柴油机辐射的空气噪声airbornenoiseemittedbymarinedieselengine

柴油机结构表面向空气中辐射的噪声。

注：包括装有规定的空气滤清器或进气消声器时的进气噪声。不包括被测柴油机通过外接的进气管由舱外进气时

的进气噪声，也不包括排气噪声和试验中与被测柴油机相连的齿轮箱及任何被驱动机械所辐射的噪声。

3.4

背景噪声backgroundnoise

在测量表面上测点位置处的由被测柴油机之外的声源所产生的噪声。

1