Horizontal Vibration Control Mechanism and Optimization for Pipeline Structures with the Placement Effect of Multi‐Cavity Particle Damper

ABSTRACT Pipeline vibrations are a major contributor to structural fatigue and leakage incidents, resulting in significant economic losses and environmental hazards. Particle dampers have demonstrated strong effectiveness in suppressing pipeline vibrations. However, existing research on pipeline vibration control has largely overlooked the impact of the placement of particle dampers, limiting their practical engineering applications. To address this challenge, the multi‐cavity particle damper (MPD) with high damping effect is taken as the research object. A mechanical model of an MPD‐controlled pipeline incorporating placement effects was first developed, alongside an innovative simulation methodology. Subsequently, horizontal vibration control tests were conducted to validate the accuracy of the mechanical model. The effects of MPD parameters and placement on the damping performance were then investigated, and the optimal parameters and placement were obtained. Finally, an optimization design process was proposed for MPD‐controlled pipelines under multi‐modal broadband excitation. The results indicate that MPDs exhibit a significant damping effect under resonant excitation, achieving a damping rate of up to 97.31%. Additionally, adjusting the placement of MPDs can effectively enhance damping performance under non‐resonant excitation. By optimizing MPD parameters and placement under low‐order modal broadband excitation, the performance of MPDs under multi‐modal broadband excitation can be significantly improved. The proposed optimization design process provides a scientific basis for designing MPD‐based vibration control solutions for pipelines operating under complex conditions. Summary Proposing a mechanical model of an MPD‐controlled pipeline, incorporating the effects of damper placement. Validating the significant damping effect of the MPD on multi‐order modes of the controlled pipeline. Exploring the influence of MPD displacement on its vibration reduction effect. Proposing an optimization method for the MPD‐controlled pipeline under multi‐modal broadband excitation. Discussing the vibration control design for the MPD‐controlled pipeline.