【摘要】 输流管路振动是引起工程结构振动噪声的重要原因之一，输流管路的弯管将导致非定常流场，引发壁面压力脉动产生流致噪声。为了研究压力脉动对输流管道振动特性影响，本文对某一空间三维管道建立有限元模型，利用Ansys Workbench进行双向耦合计算，分析管路在不同压力脉动条件下和不同位置的振动情况。结果表明，压力脉动远小于静压力时可以忽略压力脉动对管路振动的影响，在简单管路条件下，当脉动压力增大以后，振动加速度级和压力脉动之间存在近于线性的增长关系，这些结论对抑制管路振动噪声具有重要意义。更多还原

【Abstract】 The vibration of the transmission pipeline is one of the important causes of the vibration and noise of engineering structures, the bend of the transmission pipeline will lead to unsteady flow and cause the pressure fluctuation on the wall to generate flow induced noise. In order to study the influence of pressure pulsation on the vibration characteristics of flow transmission pipeline, a finite element model is established for a three-dimensional pipeline in a space, and bidirectional coupling calculation is carried out using Ansys Workbench to analyze the vibration of the pipeline under different pressure pulsation conditions and at different positions. The results show that when the pressure pulsation is far less than the static pressure, the influence of the pressure pulsation on the pipeline vibration can be ignored. Under the condition of simple pipeline, when the pulsation pressure increases, the total vibration level and the pressure pulsation have a nearly linear growth relationship. These conclusions are of great significance for suppressing the pipeline vibration noise.更多还原