IEC 61400-11 噪声测量技术

IEC 61400-11 噪声测量技术

IEC 61400-11

风力发电机组,

第11部分:噪声测量技术

1 范围

这个程序介绍的方法能够以一致的和正确的方式确定单个风力机噪声发散的特性。这个程序包括以下部分:

, 特定的声学测量位置;

, 获得声学、气象学和相关风力机运行数据的必要条件;

, 分析获得的数据和数据报告的内容;

, 分析特殊声学发散参数和环境评估中的相关描述。

2 方法大纲

应用这个国际表标准描述的方法提供视在有利声功率级、频率和在整数风速6到10m/s时单独风力机的声值。可选的，方向性也可能被决定。

为了受到地形影响、大气条件或风力产生的噪声的最小影响测量在靠近涡轮的特定位置进行。在试验、参考距离R基于风力机使用的尺寸的情况下说明风0 力机的尺寸。

通过放置在地面上的甲板上的麦克风进行测量能减少麦克风产生的风力噪声和最小化不同地面类型产生的影响。

在短时间周期和大范围风速中同时测量声压级和风速。标准风速被修改成相应的参考高度10m和参考在粗糙长度0.05m的风速。声音级在标准风速6、7、8、9和10m/s时被决定和用于计算视在有利声功率级。

通过比较在参考位置测量到的涡轮周围其它三个方向的声级确定方向性。

附件情报包括:

, 风力机噪声发散和它们的量的其它可能特性(附件 A); Details of green

to introduce "the art of bonsai" concept, plant morphology, leaf color, aromas to create different moods and charms. (B) improving air pollution prevention and control. …… Air p ollution sources in the four areas, a dust pollution and industrial enterprises of coal-burning pollution. A significant proportion of gypsum, stone processing enterprises and use of glass furnace standards of environmental protection facilities. Second, poor dust control, wide range of construction dust, road dust capacity. Three is to build coal-fired boilers in the region,

particularly within the city's outdoor barbecue gas discharge seriously. Four motor vehicle exhaust is not inIn particular the greening of urban areas, it is necessary to carefully select the species suited to local soils, reflecting ... ... Features also allow for the evergreen trees, so that people walking in the shade. On one handTo expand green areas, improve planting quality fuss; but also to focus on simplicity and generosity of the green on the other hand, to enhance the Visual effect of green scale. Big green landscape according to the terrain the moderate, plant communities in natural, varied colors, flowers and clear principles, reflect the level, color and seasonal change.

, 录音/重放设备标准(附件 B);

, 湍流强度评估(附件 C);

, 测量不确定性评估(附件 D)。 3 使用仪器

声学工具

确定等价连续声级的设备

确定三分之一倍频程波段范围的设备

确定窄波段范围

有测量甲板和挡风玻璃的麦克风

声学口径测量器

数据录音/重放系统

非声学工具

风速计

电能传感器

风向传感器

其它使用仪器

可追踪的刻度

以下设备将被有规律的选定和由一个国家或首要标准实验室进行校准。

最后刻度的最大时间将被规定为各个项目中设备的要求:

, 声学口径测量器(12月)

, 麦克风(24月)

, 整体声级表(24月)

, 频谱分析器(36月)

, 数据录音/重放系统(24月)

, 风速计(24月)

, 电能传感器(24月)

4 测量和测量程序

Details of green to introduce "the art of bonsai" concept, plant morphology, leaf color, aromas to create different moods and charms. (B)

improving air pollution prevention and control. …… Air pollution sources in the four areas, a dust pollution and industrial enterprises of coal-burning pollution. A significant proportion of gypsum, stone processing enterprises and use of glass furnace standards of environmental protection facilities. Second, poor dust control, wide range of construction dust, road dust capacity. Three is to build coal-fired boilers in the region, particularly within the city's outdoor barbecue gas discharge seriously. Four motor vehicle exhaust is not inIn particular the greening of urban areas, it is necessary to carefully select the species suited to local soils, reflecting ... ... Features also allow for the evergreen trees, so that people walking in the shade. On one handTo expand green areas, improve planting quality fuss; but also to focus on simplicity and generosity of the green on the other hand, to enhance the Visual effect of green scale. Big green landscape according to the terrain the moderate, plant communities in natural, varied colors, flowers and clear principles, reflect the level, color and seasonal change.

测量位置

声学测量位置

风速和方向测量位置

声学测量

声学测量要求

, 完整的测量链将包括测量前和测量后至少在一个频率，或如果麦

克风在重新配置期间时不连贯的。