Vibration Transfer Path and Characteristic Analysis of Shaft-Underwater Conical Cylindrical Shell
-
摘要: 为研究轴-双层壳结构的传递特性, 基于HyperMesh-ANSYS构建流固耦合有限元模型, 模拟 “轴激励-轴承传递-壳体与液体耦合”全流程动力学行为。研究分析了舷间液密度、轴承刚度及壳体内外流体对振动传递的影响。结果表明: 舷间液通过附加质量效应降低系统共振频率, 并通过流固耦合增强声压级; 轴承刚度增加抑制轴振动, 激发壳体高频共振; 在低频段, 舷间液的强连续性增强双壳体之间振动传递, 而高频段附加质量和阻尼效应阻挡振动传递。文中研究揭示了“轴-锥柱双层壳”模型的振动传递影响, 为水下航行器声振提供了理论支撑。Abstract: In order to study the transmission characteristics of the shaft-double shell structure, a fluid-solid coupling finite element model was constructed based on HyperMesh-ANSYS to simulate the dynamic behavior of the whole process of "shaft excitation-bearing transmission-shell and liquid coupling." The effects of inter-ship fluid density, bearing stiffness and fluid inside and outside the shell on vibration transmission are studied and analyzed. The results show that the inter-ship liquid reduces the resonance frequency of the system through the additional mass effect, and enhances the sound pressure level through the fluid-solid coupling. The increase of bearing stiffness suppresses shaft vibration and excites high frequency resonance of shell. In the low frequency band, the strong continuity of the inter-ship liquid enhances the vibration transmission between the double shells, while the additional mass and damping effect block the vibration transmission in the high frequency band. This study reveals the vibration transmission effect of the 'shaft-cone double-layer shell' model, and provides theoretical support for the acoustic vibration of underwater vehicles.
-
Key words:
- undersea vehicle /
- shaft-cone double shell /
- inter-ship liquid /
- transfer path /
- fluid-solid coupling
-
图 3 轴-锥-柱双层壳流固耦合有限元模型
Figure 3. Fluid-solid coupling finite element model of shaft-cone-column double shell
图 6 各结构平均加速度幅值曲线及振级落差
Figure 6. Average acceleration amplitude curves and vibration level difference of each structure
图 7 不同模型轻外壳振动响应及声辐射分析
Figure 7. Vibration response and acoustic radiation analysis of different light shell models
图 9 轴承刚度对不同结构的加速度幅值影响
Figure 9. The influence of bearing stiffness on the acceleration amplitude of different structures
图 11 不同密度舷间液下壳体平均加速度幅值分析
Figure 11. Analysis of average acceleration amplitude of submerged shell between different densities
图 12 不同密度舷间液声辐射
Figure 12. Intership liquid acoustic radiation between different densities
图 13 有无舷间液仿真结果振动幅值对比
Figure 13. Vibration amplitude comparison of simulation results with or without intership liquid
图 14 有无舷间液声辐射结果分析
Figure 14. The results analysis of the presence or absence of intership liquid acoustic radiation
图 15 有无外流域仿真结果振动幅值对比
Figure 15. Comparison of the vibration amplitude of the simulation results with and without external watershed
表 1 不同尺寸网格
Table 1. Grids of different sizes
网格尺寸/m 0.04 0.03 0.02 0.01 单元数 251 025 565 501 1 102 051 2 052 524 
下载: 导出CSV
表 2 已有模型湿模态
Table 2. Wet modes of the existing model
阶数 固有频率/Hz 模态(m, n) 1 4.92 (1, 2) 2 9.06 (1, 3) 3 10.71 (2, 3) 4 11.24 (2, 2) 5 14.70 (3, 3) 6 18.68 (1, 4)
下载: 导出CSV
表 3 仿真模型湿模态
Table 3. Wet modes of the simulation model
阶数 固有频率/Hz 模态(m,n) 1 5.03 (1, 2) 2 9.37 (1, 3) 3 10.79 (2, 3)
下载: 导出CSV
-
[1] Kim J S, Om C L, Kang D, et al. Dynamic analysis of laminated composite double cylindrical and conical shells with bulkheads using meshfree method[J]. Acta Mechanica, 2023, 234(10): 4775-4800. doi: 10.1007/s00707-023-03628-w [2] Reaei S, Talebitooti R. Functionally graded viscoelastic core characteristics on vibroacoustic behavior of double-walled cylindrical shells in a subsonic external flow[J]. Journal of Vibration and Control, 2023, 29(1-2): 265-285. doi: 10.1177/10775463211046728 [3] Cao X T. Acoustic radiation from stiffened double concentric large cylindrical shells: Part II Creeping Waves[J]. Journal of Vibration and Acoustics, 2023, 145(4): 041002. doi: 10.1115/1.4056634 [4] Luo X W, Zhou H B, LI L, et al. Acoustic vibrations of underwater double-walled cylindrical shells with elastically restrained boundaries[J]. Applied Ocean Research, 2025, 154: 104426. doi: 10.1016/j.apor.2025.104426 [5] 谭路, 纪刚, 周其斗, 等. 基于波数谱的双层圆柱壳外壳振动与声辐射特性分析[J]. 中国舰船研究, 2015, 10(6): 68-73.Tan L, Ji G, Zhou Q D, et al. Analysis on the vibration and sound radiation characteristics of double cylindrical shells using wave number spectrums[J]. Chinese Journal of Ship Research, 2015, 10(6): 68-73. [6] 张占阳, 吕世金, 白振国. 有限长圆柱壳水下声辐射与散射耦合特性研究[J]. 声学技术, 2019, 38(2): 76-79. [7] 曹晓明, 喻卫宁, 王磊, 等. 环向加筋夹层圆柱壳体应力计算方法[J]. 哈尔滨工程大学学报, 2023, 44(2): 181-189. doi: 10.11990/jheu.202105005Cao X M, Yu W N, Wang L, et al. Stress analysis of ring-stiffened sandwich cylindrical shells[J]. Journal of Harbin Engineering University, 2023, 44(2): 181-189. doi: 10.11990/jheu.202105005 [8] 王世彦, 俞孟萨. 舷间液舱模型声振耦合特性及声辐射控制[J]. 船舶力学, 2019, 23(1): 96-109.Wang S Y, Yu M S. Sound and vibration coupling characteristic and acoustic radiation control of water cabin[J]. Journal of Ship Mechanics, 2019, 23(1): 96-109. [9] Ye T G, Jin G Y, Su Z, et al. A unified Chebyshev-Ritz formulation for vibration analysis of composite laminated deep open shells with arbitrary boundary conditions[J]. A rchive of Applied Mechanics, 2015, 84(4): 441-471. [10] 王献忠, 林鸿洲, 江晨半, 等. 计及层间水的水下双层圆柱壳声振特性研究[J]. 华中科技大学学报(自然科学版), 2020, 48(8): 109-114. doi: 10.13245/j.hust.200819Wang X Z, Lin H Z, Jiang C B, et al. Vibro-acoustic responses analysis of submerged double-walled cylindrical shells with interlayer water[J]. Journal of Huazhong University of Science and Technology(Nature Science Edition), 2020, 48(8): 109-114. doi: 10.13245/j.hust.200819 [11] Burroughs C B. Acoustic radiation from fluid-loaded infinite circular cylinders with doubly periodic ring supports[J]. Journal of the Acoustical Society of America, 1984, 75(3): 715-722. [12] Laylagnet B. Modal analysis of a shell’s acoustic radiation in light and heavy fluids[J]. Journal of Sound and Vibration, 1989, 131(3): 397-415. doi: 10.1016/0022-460X(89)91001-8 [13] Yoshikawa S, Willams E G, WashbuRN K B. Vibration of two concentric submerged cylindrical shells coupled by the entrained fluid[J]. Journal of the Acoustical Society of America, 1994, 95(6): 3273-3286. doi: 10.1121/1.410021 [14] Sorokin S V, Ershova O A. Analysis of the energy transmission in compound cylindrical shells with and without internal heavy fluid loading by boundary integral equations and by Floquet theory[J]. Journal of Sound and Vibration, 2006, 291(1): 81-99. doi: 10.1016/j.jsv.2005.05.031 [15] 白振国, 张峰, 丁灿龙. 水下有限长双层圆柱壳舷间声功率传递特性分析[J]. 船舶力学, 2014, 18(10): 1262-1274.Bai Z G, Zhang F, Ding C L. On power transmission behavior of finite length double-layer cylindrical shells[J]. Journal of Ship Mechanics, 2014, 18(10): 1262-1274. [16] Zhang X M, Frequency analysis of submerged cylindrical shells with the wave propagation approach[J]. International Journal of Mechanical Sciences, 2002, 44(7): 1259-1273. -
下载:
点击查看大图
计量
- 文章访问数: 31
- HTML全文浏览量: 23
- PDF下载量: 15
- 被引次数: 0
