Experimental Study of Hydromechanical System Pipeline Dynamic Characteristics

The article considers vibration resistance of hydromechanical system pipelines characterizing the reliability of their operation. As a rule, vibrations and noise in pipelines are caused by pressure pulsations in the flow of the working medium and structural vibrations from superchargers propagating along the pipeline structure. An experimental analysis of vibroacoustic parameters of a real complex pipeline system with a supercharger was performed to study its dynamic behavior. At this stage of the study, the stationary process of pump operation forming a turbulent flow in the pipeline, was researched. In the course of the physical experiment, a spectral analysis was performed and vibroacoustic spectra were built at the selected control points of a separate straight section of the pipeline in the frequency range of 0.5 ... 400.0 Hz. An analysis of the change in dynamic parameters along the length of a straight section was made at various flow rates of the working fluid. The influence of the operating parameters of the supercharger (supply and pressure) on the vibroacoustic characteristics of the pipeline was studied. It was found that transverse oscillations are of greater importance in the formation of the dynamic behavior of the studied area. It is determined that with increasing the flow rate, the relative vibrational displacement of the pipeline along the X axis (longitudinal vibrations) also increases.

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