流体粘度对通孔泡沫铝水下声学特性的影响  

The effect of fluid viscosity in open-cell foam aluminum on underwater acoustic characteristics

作　　者：姚欣鹏[1] 何世平[1] 

机构地区：[1]海军工程大学机械工程系,湖北武汉430033

出　　处：《舰船科学技术》2014年第6期68-72,共5页Ship Science and Technology

摘　　要：对流体饱和状态的通孔泡沫铝的水下声学性能进行实验研究,测试500～4 000 Hz频率范围内不同粘度流体饱和状态下的水下反声系数和透声系数.结果表明,通孔泡沫铝中充入流体的粘度对其水下声学特性有非常大的影响：低粘度流体饱和的通孔泡沫铝有优良的水下反声性能,而高粘度的流体饱和通孔泡沫铝有较好的吸声性能;流体的粘度对通孔泡沫的反声性能有所降低,对吸声性能有较大的提高;通孔泡沫铝在低粘度的流体饱和状态下隔声性能较好.Experimentally investigated the underwater acoustic performance of open-cell aluminum foam within fluid saturation.Tested the reflection coefficients and absorption coefficients of the aluminum foam with different viscosity fluid saturation in the frequency from 500 Hz to 4 000 Hz.Experimental results showed that the viscosity of the internal fluid in the open-cell aluminum foam effects strongly on underwater acoustics properties.The low viscosity fluid saturation open-cell aluminum foam has excellent underwater reflected performance,and high viscosity fluid saturated one has good absorption properties.The viscosity of the fluid in the open-cell foam does not improve its reflection performance,but has greatly improved its absorption performance.Open-cell aluminum foam has better sound insulation performance in a low viscosity fluid saturation.

关 键 词：通孔泡沫铝 水下 声学性能 流体饱和 粘度 

分 类 号：O427[理学—声学]