摘要
本文用声强法在工作现场对大型汽轮发电机组中的发电机部分进行了声功率级测量。介绍了声强测量理论、声强测量仪器以及所选定的初始测量条件(测量点数、测量距离等)。按照国际标ISO/DIS9614对测量进行了验证。结果表明,声强法特别适合于像电厂这类在发电机附近有强噪声干扰源存在的情况下对发电机进行较高精度的声功率级测量的场所。
In this paper, the sound power level of large turbogenerator in operating site is determined by means of sound intensity measurement. The sound intensity theory,the instrument for its measurement and the initial measured condition selected (e.g. number of measured point, measured distance etc.) are introduced. The measured results are verified in accordance with international standart ISO/DIS 9614.It is shown, that the sound intensity method is especcially suitable to power plant, where the sound power level of generator is measured with higher accuracy under conditions of significant noise interference source near generator.
出处
《大电机技术》
北大核心
1991年第6期9-15,共7页
Large Electric Machine and Hydraulic Turbine
基金
国家自然科学基金No5870317
关键词
汽轮发电机
声功率级
测量
声强
sound power level
sound intensity
sound field immunity index
