关键词: 液压管路, 管路振动, 双向流固耦合, 卡箍约束优化, 涡结构演化

Abstract:

Amid growing demands for green manufacturing, equipment miniaturization, and high efficiency, compact hydraulic systems are critical in disassembly, assembly, and transport operations due to their high power density and flexibility. However, severe vibration in the pipeline systems significantly compromises equipment reliability. This study investigates the dynamic response mechanism of a compact on-board hydraulic pipeline system, using a specific piece of disassembly and assembly equipment with spatially constrained clamp placement as a case study, through a two-way fluid-structure interaction method, and optimizes the clamp layout. The results show that resonance occurs when the excitation frequency of the hydraulic oil pressure pulsation approaches the pipeline's natural frequency. Furthermore, the vortex intensity distribution in the flow field exhibits a positive correlation with the stress concentration areas on the pipe wall. Differences in the primary vibration mechanisms were identified across pipeline sections, and the configuration of vortex structures was directly linked to the vibration intensity, indicating that the unsteady load induced by vortex evolution is the primary excitation source. This research provides a theoretical basis for vibration control and optimal clamp arrangement in minimally constrained compact hydraulic systems.

Key words: hydraulic pipelines, pipeline vibration, two-way fluid-structure interaction, clamp constraint optimization, vortex structure evolution