本文以单层环肋圆柱壳为对象，开展相关振动与声辐射模型试验，分析了力激励、声源激励对单层圆柱壳在空气中与水下的影响。通过对结构的固有频率展开试验与数值分析，基于有限元及边界元方法，探讨了单层环肋壳在不同频段的声振特性，进而对比分析了壳体振动与声辐射特性。结果表明：在中低频段，空气中与水中单层环肋壳的振动特征差别较小，频谱特征及峰值特征较为相似；但在水中振动响应衰减更快，高频段圆柱壳结构在空气中与水中的振动特性差别较大；在不同激励下，力激励对壳体的振动声辐射影响较大，声激励影响微小。
With single ring-stiffened cylindrical shell taken as an object, the model experiment was carried out to study the influence of the effects of force and sound excitation on the single cylindrical shell in air and underwater. Test and numerical analysis by the natural frequency of the shell structure, and then, by using FEM/BEM software, the characteristics of the vibration and sound radiation of cylindrical shell structure are compared and analyzed. The results show that the vibration characteristics of single ring-stiffened shells in air and water are similar in middle and low frequencies. But the vibration response attenuates faster in water, and the vibration characteristics of cylindrical shells in high frequencies are quite different in air and water. Under different excitations, the force excitation has a great influence on the vibration and sound radiation of the shell.
2019,41(10): 44-49 收稿日期：2019-04-01
DOI：10.3404/j.issn.1672-7649.2019.10.008
分类号：U663
作者简介：张远双(1970-),男,副教授,研究方向为船舶及海洋工程结构物设计
参考文献：
[1] WANG C, LAI J C S. Sound radiation efficiency of finite length acoustically thick circular cylindrical shells under mechanical excitation I:theoretical analysis[J]. J Sound Vib, 2000, 232(2):431-447
[2] WANG C, LAI J C S. Sound radiation efficiency of finite length acoustically thick circular cylindrical shells under mechanical excitation II:limitations of the infinite length model[J]. J Sound Vib, 2001, 241(5):825-838
[3] KO SUNG Hwan, SEONG Woojae, PYO Sangwoo. Structure-borne noise reduction for an infinite, elastic cylindrical shell[J]. J Acoust Soc Am, 2001, 109(4):1483-1495
[4] 骆东平, 徐治平. 环肋柱壳在流场中振动特性分析[J]. 中国造船, 1990(02):69-81
[5] 汤渭霖, 何兵蓉. 水中有限长加肋圆柱壳体振动和声辐射近似解析解[J]. 声学学报, 2001, 6(1):1-5
[6] 彭旭, 关珊珊, 骆东平, 等. 内部声激励下加筋圆柱壳的声辐射特性分析[J]. 固体力学学报, 2007, 28(4):355-361
[7] 杨德森, 张睿, 时胜国. 内部声激励下圆柱壳低阶模态声振特性研究[J]. 哈尔滨工程大学学报, 2017, 38(8):1210-1215
[8] 罗琦, 陈美霞, 关姗姗. 内部声激励下单层圆柱壳声振性能的影响规律分析[C]//船舶水下噪声学术讨论会. 2013.
[9] 庞福振. 船舶结构噪声截断模型数值预报方法研究[D]. 哈尔滨:哈尔滨工程大学, 2012.
