吸声尖劈对板柱组合结构水下声学特性影响的试验研究

为考察吸声尖劈对船舶声纳平台水下声学环境的影响,开展了吸声尖劈对板柱组合结构水下声学特性影响的模型试验研究。通过对板柱组合结构0%、36%、60%、100%敷设吸声尖劈材料,在声波以0°、90°、180°方向入射板柱组合结构时,研究了尖劈敷设方式、声波入射角度对板柱组合结构水下声场及散射声场的影响,得到了不同工况下板柱组合结构典型部位的声场分布。研究表明:吸声尖劈可明显改变板柱组合结构的声场分布,降低板柱组合结构的自噪声;但其抑制效果随考核位置、声波频率、敷设密度的不同而各有变化。

Experimental investigation of the effects of sound absorption wedges on the underwater acoustic characteristic within a Compound Plate & Cylindrical Shell Structure

In order to study the influence of sound absorption wedge on the underwater sound environment of a ship sonar platform,the experiment investigation of sound absorption wedge on the underwater acoustic characteristic within a Compound Plate & Cylindrical Shell Structure (CPCSS) is carried out. By supposing sound incident wave’s entry angle is 0°, 90°, 180°, respectively; while the arrangement density of sound absorption wedge is 0%, 36%, 60%, 100%, sound pressure distribution of hotspot points is obtained. Study shows that sound absorption wedge can change pressure distribution of CPCSS, and reduce self-noise level of the CPCSS. However, the effect varies with hotspot location, with the frequency of incident wave, and with the arrangement density of sound absorption wedge.