数字海洋与水下攻防2025，Vol.8Issue(2)：167-174,8.DOI:10.19838/j.issn.2096-5753.2025.02.008
浸没圆柱壳振动性能计算耦合模型对比研究
Comparative Study of Coupled Models for Vibration Performance Calculation of Submerged Cylindrical Shells
聂睿 1王小康 1张明 1侯新保1
作者信息
- 1. 宜昌测试技术研究所,湖北 宜昌 443003||清江创新中心,湖北 武汉 430076
- 折叠
摘要
Abstract
Existing research has indicated that both fluid-structure interaction(incompressible fluid)and acoustics-structure interaction(compressible fluid)models can be used to derive the coupled vibration equations for cylindrical shell structures submerged in an infinite water domain.Furthermore,within the low-frequency range,there is no significant difference in the calculated results of the same-order natural frequencies of the coupled system when using either type of equation.On the basis of the above research,the influence of fluid compressibility on low-frequency forced vibrations within a coupled system is further analyzed.The coupled vibration equations for cylindrical shell structures in compressible and incompressible fluid fields are derived respectively,and the forced vibration response is solved.The findings reveal that when dealing with compressible fluids,it is possible to explain the damping effect resulting from fluid compressibility through a concept involving complex attached water mass.Moreover,at lower excitation frequencies,Rayleigh damping effects are relatively weak and both model types exhibit consistent vibration responses.As excitation frequency increases,overall damping tends to rise,and peak vibration response levels reduce notably in acoustic-structure models compared to those in fluid-structure models.Based on these outcomes,engineering researchers may opt for computationally less expensive fluid-structure interaction analysis models during assessments of vibrational performance.They can then adjust the fluid mass matrix to account for dampening effects arising from fluid compressibility,thus achieving a balance between computational cost and precision.关键词
圆柱壳/受迫振动/流体压缩性/流固耦合/声固耦合Key words
cylindrical shell/forced vibration/fluid compressibility/fluid-structure interaction/acoustic-structure interaction分类
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聂睿,王小康,张明,侯新保..浸没圆柱壳振动性能计算耦合模型对比研究[J].数字海洋与水下攻防,2025,8(2):167-174,8.
