论文部分内容阅读
以单、双层环肋圆柱壳为对象,通过模型试验分析圆柱壳内部介质与壳体的耦合对壳体声振性能的影响,进而对比分析力激励与声激励下,壳体振动与声辐射的关系以及单、双壳的声振性能.结果表明:当圆柱壳内部介质为空气时,声激励作用下声腔模态与结构模态耦合与否对壳体振动以及内部声场的影响很小;当壳体受力激励作用时,外场声辐射与壳体结构模态有关,当壳体受声激励作用时,外场声辐射与壳体结构模态、声腔模态有关;双壳的外壳对力激励和声激励时的振动与声辐射均起到屏蔽作用.
Based on the model test, the influence of the coupling between the shell and the shell on the acoustic and vibration performance of the shell was analyzed by single-layer and double-layer ring-stiffened cylindrical shell. Then the vibration and sound radiation The results show that the coupling of the acoustic cavity mode and the structural mode under the acoustic excitation has little effect on the vibration of the shell and the internal sound field when the medium inside the cylindrical shell is air. When the shell is subjected to the force excitation, the external sound radiation is related to the shell structure modal. When the shell is acoustically excited, the external sound radiation is related to the shell structure modal and cavity mode. Excitation and sound excitation vibration and acoustic radiation play a shielding effect.