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首页> 外文期刊>Archives of acoustics >The Radiation Efficiency Measurements of Real System of a Thin Circular Plate Embedded Into a Thick Square Baffle
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The Radiation Efficiency Measurements of Real System of a Thin Circular Plate Embedded Into a Thick Square Baffle

机译：嵌入厚方形挡板的圆形薄板实际系统的辐射效率测量

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摘要

Most of sound sources are complex vibroacoustic objects consist of numerous elements. Some coupled vibrating plates of different shapes and sizes can be easily found in urban environments. The main aim of this study is to determine the sound radiation of coupled plates system of practical importance. The investigated vibroacoustic system consist of a thin circular plate coupled with a thick flat baffle with a circular hole. The circular plate has been mounted to the baffle's hole using screws and two steel rings. The measurement setup was located inside a semi-anechoic chamber to assure the free field conditions. It was necessary to take into account the whole system surface to obtain the radiation efficiency based on the Hashimoto's method. Such an approach can be troublesome and time-consuming. Therefore, the criterion has been proposed which allows the vibration velocity measurements and calculations to be performed only for the thin plate's area. An alternative approach has been proposed based on the classical Rayleigh integral formula. Its advantage is a simpler implementation in a computer code. The obtained results have been compared with the theoretical results obtained for the elastically supported circular plate. A good agreement has been obtained at low frequencies.
机译：大多数声源是复杂的振动声物体，由许多元素组成。在城市环境中很容易找到一些不同形状和大小的耦合振动板。这项研究的主要目的是确定具有实际意义的耦合板系统的声辐射。所研究的振动声学系统由薄的圆形板和厚的带有圆孔的平坦挡板组成。圆形板已使用螺钉和两个钢环安装到挡板的孔中。测量装置位于半消声室内，以确保自由场条件。基于桥本法，必须考虑整个系统表面以获得辐射效率。这样的方法可能麻烦且耗时。因此，提出了仅允许对薄板区域进行振动速度测量和计算的标准。已经提出了一种基于经典瑞利积分公式的替代方法。它的优点是在计算机代码中实现更简单。将获得的结果与弹性支撑圆形板的理论结果进行了比较。在低频下已经获得了很好的协议。

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