摘要
Experiments involving a sonar platform with a sound absorption wedge were carried out for the purpose of obtaining the low frequency acoustic characteristics. Acoustic characteristics of a sonar platform model with a sound absorption wedge were measured, and the effects of different wedge laid areas on platform acoustic characteristic were tested. Vibration acceleration and self-noise caused by model vibration were measured in four conditions: 0%, 36%, 60%, and 100% of wedge laid area when the sonar platform was under a single frequency excitation force. An experiment was performed to validate a corresponding numerical calculation. The numerical vibration characteristics of platform area were calculated by the finite element method, and self-noise caused by the vibration in it was predicted by an experiential formula. The conclusions prove that the numerical calculation method can partially replace the experimental process for obtaining vibration and sound characteristics.
基金
Supported by Harbin Talents of Science and Technology Innovation Special Fund(2011RFQXG021)
作者简介
Danzhu Yu has a master degree in design and construction of naval architecture and ocean structures. Her research interests include structural dynamics, vibration and noise control, and design of structural intelligent systems for prevention of vibration.Xiongliang Yao is a professor. His research interests include structural analysis and control and fluid mechanics of ocean architecture. He is currently involved in the following research areas： hydrodynamic properties, fluid-structure interaction analysis, design of structural intelligent systems for prevention of vibration and impact.
