Inverse and reciprocity methods for experimental determination of radiation modes.
Inverse and reciprocity methods for experimental determination of radiation modes.
复制标题
用于实验确定辐射模式的逆法和互易法。
DOI：
--
复制
发表时间：
2001
期刊：
影响因子：
--
通讯作者：
C. Hansen
中科院分区：
文献类型：
--
作者：
A. P. Berkhoff;E. Sarajlic;B. Cazzolato;C. Hansen
提出了实验方法来解决寻找最有效地辐射声音的结构的振动模式的问题。这些振动模式，即所谓的辐射模式，使声辐射算子对角化，因此独立辐射。所考虑的方法是互易法、逆法以及这些方法的组合。互易技术应用于寻找对外壳中的势能有贡献的速度感测辐射模式的问题。测量结果与模拟结果一致。使用逆向技术，表明可以找到用于利用压电贴片传感器阵列进行传感的辐射模式。通过将反演方法与倒数技术相结合来测量某些传递函数，可以获得改进的结果。
Experimental methods are presented for the problem of finding the vibration patterns of a structure that radi-ate sound most efficiently. These vibration patterns, the so-called radiation modes, diagonalize the acoustic radiation operator and therefore radiate independently. The methods that are considered are reciprocity methods, inverse methods and a combination of these methods. The reciprocity technique is applied to the problem of finding the radiation modes for velocity sensing that contribute to the potential energy in an enclosure. Measured results agree with simulated results. Using an inverse technique, it is shown that the radiation modes for sensing with an array of piezoelectric patch sensors can be found. Improved results can be obtained by combining the inverse method with a reciprocal technique for measuring some of the transfer functions.