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Method for the analysis of sound sources in rotating systems

旋转系统中声源的分析方法

基本信息

批准号：
407161744
负责人：
Professor Dr.-Ing. Ennes Sarradj
金额：
--
依托单位：
Fachgebiet Technische Akustik
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2018
资助国家：
德国
起止时间：
2017-12-31 至 2021-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/407161744?language=en
关键词：
Method analysis sound sources rotating

项目摘要

Rotating machinery parts are often significant causes of noise. Accordingly, many efforts to control noise focus on noise control measures on these parts. The experimental analysis of sound generation in rotating systems often falls back to an analysis in the non-rotating system. For example, instead of a whole fan just one blade of a fan is analyzed in a wind tunnel. The conclusions from such examination cannot always be transfered to the conditions that can be found in rotating system. In some cases (for example an electric motor) such procedure is inherently impossible. Thus, the project aims at a considerable contribution to the analysis and the improved understanding of the sound generation in rotating systems. This should be accomplished by developing a new experimental method allowing detailed and reliable measurements of location, kind and strength of sound generation at rotors. Basis of the method is a measurement using a fixed, non-rotating microphone array. Using appropriate signal processing, the array is virtually rotated with the source and using various sound source and sound propagation models the properties of the rotating sound sources are estimated by a calculation method. Essential to the project is the examination of which models and methods yield reliable results. To this end various models and methods are implemented and analyzed using a Monte-Carlo-approach and various sets of synthesized test data sets. Additionally, the practical application is tested using two laboratory experiments. The importance of the project aims results from the possibility to test hypotheses, model predictions or numerical calculations of sound generation in rotating systems with much greater detail as it is possible today. This enables more focus noise control measures at the source.

旋转机械部件通常是噪声的重要原因。因此，控制噪声的许多努力集中在这些部件上的噪声控制措施上。旋转系统中声产生的实验分析常常福尔斯回到非旋转系统中的分析。例如，在风洞中只分析风扇的一个叶片，而不是整个风扇。从这种试验中得出的结论并不总是可以移植到旋转系统中可以找到的条件。在某些情况下（例如电动机），这样的程序本质上是不可能的。因此，该项目旨在对旋转系统中的声音产生的分析和更好的理解做出相当大的贡献。这应该通过开发一种新的实验方法来实现，该方法允许详细和可靠地测量转子处声音产生的位置、种类和强度。该方法的基础是使用固定的非旋转麦克风阵列进行测量。使用适当的信号处理，阵列虚拟地与源一起旋转，并且使用各种声源和声传播模型，通过计算方法估计旋转声源的属性。该项目的关键是检查哪些模型和方法产生可靠的结果。为此，使用蒙特-卡罗方法和各种合成测试数据集的集合来实现和分析各种模型和方法。此外，实际应用进行了测试，使用两个实验室实验。该项目目标的重要性在于，可以像今天这样更详细地测试旋转系统中声音产生的假设、模型预测或数值计算。这使得能够在源头处采取更多的聚焦噪声控制措施。