针对单层壳和锥柱组合壳2种典型壳体结构内部强噪声源引起的水下辐射噪声问题，开展小比例缩比模型的振动声辐射试验，给出不同结构形式对声激励下，圆柱壳结构振动与声辐射的影响规律及主导因素。试验结果表明：相同声源激励条件下锥柱组合壳结构声辐射频段总声压级最小。低频段下，单层壳与锥柱组合壳之间总声级差值可达8 dB；500 Hz以下频段声腔模态起主导作用，500～1500 Hz频段内声腔模态和结构模态共同作用；内部声腔在其固有频率处会造成壳体的强烈耦合效应，从而出现声压级峰值。
Aiming at the problem of underwater radiation noise caused by strong internal noise sources of two typical shell structures, single-layer shell and conical composite shell, a vibration and acoustic radiation test with a small scale scaling model was carried out, and the influence law and leading factors of different structural forms on the vibration and acoustic radiation of cylindrical shell structure under sound excitation were given. The test results show that under the same sound source excitation conditions, the total sound pressure level of the cone composite shell structure sound radiation frequency band is the smallest, and the total sound level difference between the single-layer shell and the conical cylinder composite shell in the low frequency band can reach 8 dB. The acoustic cavity mode in the frequency band below 500 Hz plays a leading role, and the acoustic cavity mode and structural mode in the 500～1500 Hz frequency band work together. The internal acoustic cavity creates a strong coupling effect of the structure at its natural frequencies, resulting in peak sound pressure levels.
2023,45(11): 55-58 收稿日期：2022-12-30
DOI：10.3404/j.issn.1672-7619.2023.11.011
分类号：TB561
作者简介：曹阳(1982-),硕士,工程师,研究方向为武器装备系统工程
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