吸声尖劈对板柱组合结构水下声学特性影响的试验研究

摘要

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°方向人射板柱组合结构时,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.%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.