摘要
本文实验测试了新型聚氨酯空腔尖劈不同温度下材料低频动力学参数及尖劈不同静压下吸声系数。通过绘制Wicket 图进行了数据筛选，应用时温等效原理，得到了规定温度下宽频范围内材料动态力学参数，随后讨论了尖劈吸声性能随静水压力、温度、频率的变化规律。在测试数据基础上，基于优化理论对尖劈腔型进行优化设计，开展了声呐平台区敷设空腔尖劈的应用研究，分析了敷设前后声呐平台的声振特性，验证了新型聚氨酯吸声尖劈的减振降噪效果。
Abstract
The sound absorption performance of polyurethane cavity wedges is of significant importance to vibration and noise reduction of sonar platform,the wedge material dynamic mechanical parameters of different temperature and sound absorption coefficient of different hydrostatic pressure are respectively tested through the experimental research.Wicket chart is introduced to screen the test data,and the material parameters are obtained in a broad band under a certain temperature by using the equivalence principle of time-temperature.Furthermore,the varying characteristics of sound absorption performance with temperature, frequency, and hydrostatic pressure are discussed.Based on the test data, the wedge’s sound absorption performance is optimized by applying optimum theory. The vibration and acoustic characteristics of sonar platform laying of polyurethane cavity wedge is discussed through application research.The vibration and noise reduction effects of new type polyurethane cavity wedges are verified.
关键词
聚氨酯空腔尖劈 /
静水压力 /
吸声性能 /
声呐平台
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Key words
polyurethane cavity wedges /
hydrostatic pressure /
sound absorption performance /
sonar platform
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姚熊亮;计方;庞福振;于丹竹.
聚氨酯空腔尖劈吸声性能实验研究 [J]. 振动与冲击, 2010, 29(1): 88-93
Yao Xiong-liang;Ji Fang;Pang Fu-zhen;Yu Dang-zhu.
Acoustic performance experimental research of Polyurethane cavity wedges[J]. Journal of Vibration and Shock, 2010, 29(1): 88-93
中图分类号：
U661.44
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