Abstract
Pressure hydraulic pipeline vibration is a type of solid-liquid coupling in fluid-conveying pipes, with obvious instability characteristics in its development. Structural vibration caused by changes in oil flow velocity and pressure in the pressure transmission hydraulic pipeline have significant impact on the efficiency, noise, safety, and many other characteristics of the hydraulic system. Therefore, research in the vibration characteristics of pressure pipe bares important engineering significance. In this paper, an empirical method was used to study the fundamental frequency variation and vibration characteristics of a hydraulic pipe under pressure transmission. Experiments were carried out on a pressure transmission hydraulic pipeline vibration simulation experiment platform. TV400 type vibrometer was used to collect signals. The vibrometer adopts signal processing and fault diagnosis technology, which are characteristics of stringent technical parameters and powerful data management. The natural frequency of the pipeline was obtained by solving the eigenvalues of the fluid pipe vibration correction equation. The influence of flow and pressure on the natural frequency of the pipeline was analyzed, and the vibration characteristics under different rotational speeds and pressures were analyzed. The results show that the natural frequency of pipeline decreased with the increase of flow rate. Under constant flow rate, the natural frequency of the pipeline increased with the increase of pressure at an extremely small magnitude, which was negligible. This is the style of paper required for the Chinese Control Conference. The authors shall and must provide normalized electronic documents to allow convenient search and read by readers.
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