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首页> 外文会议>International Congress on Recent Developments in Air- and Structure-Borne Sound and Vibration >USING COMBINED FINITE ELEMENT AND BOUNDARY ELEMENT METHODS FOR PREDICTING ACOUSTIC RADIATION FROM A SUBMERGED RING-STIFFENED CYLINDER
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USING COMBINED FINITE ELEMENT AND BOUNDARY ELEMENT METHODS FOR PREDICTING ACOUSTIC RADIATION FROM A SUBMERGED RING-STIFFENED CYLINDER

机译：采用组合有限元和边界元方法来预测浸没环加强圆柱的声学辐射

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摘要

Experiments were performed at the Defence Research Establishment Atlantic (DREA) and at the DREA Acoustic Calibration ISarge to measure the natural frequencies of a ring-stiffened steel cylinder in air and in water and to measure acoustic radiation directivity patterns for the submerged cylinder under point-excitation. These experiments were performed to obtain data against which DREA structural and acoustic computer codes could be evaluated. The predicted in-air and submerged natural frequencies from finite element models of the cylinder and surrounding fluid matched the measured values quite well. Results of predictions of the directivity patterns at the resonant frequencies using a boundary element acoustic radiation prediction program were also in very good agreement with the experiment.
机译：实验在国防研究建立大西洋（DEA）和DREA声学校准中进行，以测量空气和水中环形加强钢缸的自然频率，并在点下测量浸没式圆筒的声辐射指向率图案励磁。进行这些实验以获得可以评估DREA结构和声学计算机代码的数据。从气缸和周围流体的有限元模型的预测的空中和浸没式固有频率良好地匹配测量值。使用边界元声辐射预测程序的谐振频率在谐振频率的方向性模式的预测也与实验非常好。

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