Abstract
Considering the axial, lateral and torsional vibrations and considering the effect of Poisson coupling in the axial vibration, ignoring the effect of friction, based on the Timoshenko beam model, a dynamic model of the lubricating oil pipeline system with force and speed as variables is established. Using lubricating oil pumps and valves as vibration sources, the vibration characteristics of multi-branch lubricating oil pipeline systems including elbows are studied. The results show that due to the coupling of lubricating oil and pipeline structure, the vibration peak and peak frequency of pipeline system are significantly reduced, but the frequency lateral vibration response amplitude increases significantly at some characteristic frequency; when the pipeline support stiffness increases, the natural frequency of the pipeline increases, causing the peak frequency of pipeline vibration to shift to high frequency, and the peak frequency resolution increases.
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