A technique for measurement of structure‐borne intensity in plates
A technique for measurement of structure‐borne intensity in plates
复制标题
板中结构强度的测量技术
DOI：
10.1121/1.2022237
复制
发表时间：
1985
期刊：
影响因子：
--
通讯作者：
Richard G. Fink
中科院分区：
文献类型：
--
作者：
E. Williams;H. Dardy;Richard G. Fink
一种测量技术，以确定结构承载强度（功率流）在一个点驱动，流体加载，均匀薄板演示。这种强度是唯一确定的知识，从表面的法向速度的正弦驱动板。提出了一种利用扫描式水听器在非常靠近源的平面上测量压力的非接触式方法。它显示了这种压力测量如何足以计算板内的二维结构强度矢量。我们称这种技术为SIMAP，即结构强度的声压测量。使用结构强度向量来计算从点驱动器注入板的功率。对注入机械功率的独立测量结果显示出非常一致的结果。SIMAP是近场声学全息术（NAH）的产物，它也提供了从相同的压力测量中辐射到介质中的正常声强。有限公司…
A measurement technique to determine the structure‐borne intensity (power flow) in a point‐driven, fluid‐loaded, homogeneous thin plate is demonstrated. This intensity is uniquely determined from a knowledge of the normal velocity of the surface of a sinusoidally driven plate. A noncontact method is presented which uses a scanning hydrophone to measure the pressure in a plane very close to the source. It is shown how this pressure measurement is sufficient to compute the two‐dimensional structural intensity vector inside the plate. We call this technique SIMAP for Structural Intensity from the Measurement of Acoustic Pressure. Uses of the structural intensity vectors to compute the power injected into the plate from a point driver are shown. Independent measurement of injected mechanical power is shown to be in close agreement. SIMAP, which is an outgrowth of nearfield acoustical holography (NAH), also provides the normal acoustic intensity radiated into the medium from the same pressure measurement. A co...