Progressive phase trends in multi‐degree‐of‐freedom systems
Progressive phase trends in multi‐degree‐of‐freedom systems
复制标题
多自由度系统的渐进阶段趋势
DOI：
10.1121/1.389269
复制
发表时间：
1983
影响因子：
2.4
通讯作者：
R. Lyon
中科院分区：
文献类型：
--
作者：
R. Lyon
在处理动力系统的噪声响应问题时，常常忽略动力系统对激励响应的相对相位。这是因为均方振幅函数能够预测人们感兴趣的许多数量，例如裂纹扩展，噪声辐射和间隙影响概率，而无需考虑相位。但相位在其他情况下也有重要作用，例如振动场的相位相干性，或对接收信号进行“去混响”的滤波器设计。本文描述了多自由度系统相位响应分析的一些早期结果，这些结果使用了与统计能量分析密切相关的思想，到目前为止，这些思想专门用于上面列出的那些倾向于忽略相位的问题。目前的结果表明，简单的理论和实验之间的良好协议，但更重要的是，他们提出了进一步的工作，应该有显着的回报，在未来的方向。
The relative phase of the response of a dynamical system to its excitation has been largely ignored in problems dealing with noise response of such systems. This is because mean‐square amplitude functions are able to predict many of the quantitites that one is interested in such as crack growth, noise radiation, and clearance impact probabilities without concern for phase. But phase has an essential role in other cases, such as phase coherence of vibration fields, or the design of filters to ‘‘dereverberate’’ a received signal. This paper describes some early results of the analysis of phase response of multi‐degree‐of‐freedom systems, using ideas that are closely related to statistical energy analysis, until now, used exclusively for the kinds of problems listed above that tend to ignore phase. The present results show good agreement between simple theory and experiments, but more importantly, they suggest directions for further work that should have significant payoff in the future.