Models of Dynamic Force Generation in Pipeline Compensators Caused by Working Fluid Pressure Pulsations

This article examines the results of computational and experimental studies of models for the generation of dynamic forces from pressure pulsations in the compensator working fluid in a frequency range of up to hundreds of hertz. It is shown that pressure pulsations and dynamic forces generated in the compensator are related to the frequency of its vibrational deformation by a quadratic relationship and, with increasing frequency, can increase the compensator stiffness by three to four orders of magnitude over a wide frequency range compared to low frequencies. An increase in the vibrational stiffness of the compensator proportional to the square of the disturbance frequency can be a diagnostic indicator of the predominance of this stiffness model component in the compensator. Proposals are developed for reducing pressure pulsations, dynamic forces, and vibration transmission through liquid-filled compensators over a wide frequency range.