Sensitivity Analysis of the GIF² Hydraulic Impulse System to Parameter Variations: Allowable Limits, Compensation Mechanisms, and Cyclic Stability Assessment

Abstract

This article presents a sensitivity analysis of the GIF² hydraulic impulse system to deviations of key parameters: closing angles of valves V2, V4, V7, water hammer pressure, rarefaction phase depth, and water level in the RTM tank. Allowable variation limits within which the system remains operational are determined. Compensation mechanisms are described: disc stops, accumulator-stabiliser, spring pressure damper, and W‑shaped hydraulic seal. It is shown that even under simultaneous deviations of several parameters within the allowable limits, the system remains stable. The results are based on numerical modelling (method of characteristics) and data from previous works [1–3].

Keywords: hydraulic impulse system, GIF², stability, sensitivity, allowable deviations, valves, rarefaction phase, hydraulic accumulator, compensation mechanisms.