Effect of skew on the tonal noise characteristics of a full-scale submarine propeller

Yu, Kukhwan; Park, Daejin; Choi, Jihun; Seol, Hanshin; Park, Il-Ryong; Lee, Soogab

doi:10.1016/j.oceaneng.2023.114218

Cited by 12 publications

(1 citation statement)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Secondly, the substantial rise in seawater pressure below 300 m diminishes the air bubble effect created by the submarine propeller operating at high speed. Additionally, all kinds of turbulence generated by the submarine in high-speed motion are easily compressed and diluted by the water pressure [13][14][15][16]. Thirdly, once the submarine submerges to a depth of 400-500 m, most of the anti-submarine means in the world today would have difficulty attacking it effectively [7].…”

Section: Introductionmentioning

confidence: 99%

Failure Behavior of Corrugated Pressure Cylindrical Shells with Variable Wall Thickness under Uniform External Pressure

Sun,

Zhang,

Zhang

et al. 2024

JMSE

View full text Add to dashboard Cite

The main load-bearing structure of submarines is the pressure shell. Shell failures are usually caused by high hydrostatic pressure and its own potential geometric imperfections. This paper proposes a cylindrical shell with a strong corrugated stiffening structure. Two theoretically geometrically identical shells are fabricated using CNC machining to ensure the reproducibility and reasonableness of the results. Firstly, the point cloud data of all the geometric parameters of the corrugated pressure cylindrical shells were obtained using a 3D scanner. Geomagic Control X 3D inspection software was used to determine the geometric deviations of the shells. Geometric reconstruction was performed using Geomagic Design X reverse modeling software to capture potential imperfections of the shells. The aluminum shells were then welded and placed in the pressure chamber. Failure loads were obtained for all shells by constant water injection and pressurization. Considering the confined nature of the pressure chamber, a nonlinear finite element analysis of the corrugated pressure cylindrical shell was carried out using Abaqus/Riks, taking into account actual fabrication imperfections. Finally, the failure behavior of the shells under uniform external pressure was determined. The results show that both corrugated pressure cylindrical shells have high machining accuracy. The numerical simulation results of the critical buckling load of the corrugated pressure cylindrical shells were in good agreement with the test results. The corrugated structure has additional advantages in retarding the generation and expansion of shell surface defects. The equilibrium path of the corrugated pressure cylindrical shell can be maintained in a smooth and continuous state, showing stable buckling behavior. This study will provide new inspiration for the structural design and failure prediction of the submarine pressure shell.

show abstract

Section: Introductionmentioning

confidence: 99%