周期支撑管路横向振动波传播特性分析

管道系统在船舶行业中应用广泛,其振动及声辐射特性一直以来都是研究的热点.基于Timoshenko梁理论,本文首先利用传递矩阵法计算了单根充液管道的横向振动响应,并通过有限元计算和实验对比验证了计算方法.在此基础上,对管道系统的传递矩阵取特征值得到波传播参数,从而进一步分析了周期支撑的充液管道系统的振动波传递特性.由本文的计算结果可见,基于Timoshenko梁理论的横向振动响应比基于Euler-Bernoulli梁理论的结果更为精准,尤其是在较高频域内.此外,弹性支撑的刚度和间距会影响波阻和波传播带.本文工作将为周期支撑管系的减振提供一定的技术参考.

Wave Propagation Analysis of Transverse Vibration of Pipeline with Periodic Supports

The extensive application of pipeline systems in ship industry has attracted growing re?search attentions on the vibration and acoustic radiation of fluid-filled pipes. In this paper, the trans?verse vibrations of pipes conveying fluid, based on Timoshenko beam theory, are calculated by using the transfer matrix method. The periodic characteristics of wave propagation, i.e. wave stop and wave bands are investigated for fluid-filled piping systems with periodic supports. Through validations against FEM and experiments, the present model considering shear deformation proves to be more ac?curate than the traditional slender body theory, especially in higher frequency domains. Meanwhile, it is found that the wave stop and propagation bands are significantly affected by the stiffness and equi?distance of periodic spring supports. This work will provide some guidance for the vibration reduction of pipeline structures with periodic supports.