## 1 Introduction
[15] proposed a tuned particle impact damper, analyzed the interaction between the transverse vibration and the additional damper, analyzed the damping performance using the damping coefficient predicted by the least-squares and Prony's methods, and verified the effects of the excitation force and restitution coefficient on damping capacity. [PERSON] et al. [16] combined the discrete element model with a simplified finite element model and compared it with experiments to obtain the validity of the method and revealed the influence of the position and filling rate of the particle dampers on different modal parameters of the structure. [PERSON] et al. [17; 18; 19] explored gears filled with damped particles or powder boreholes in a centrifugal force field, established an energy dissipation model of the particle system considering friction and inelastic collision based on the discrete element method, analyzed the energy consumption and damping characteristics of the system, and characterized particle filling rate and material as important parameters related to energy dissipation. [PERSON] et al. [20] provided an in-depth discussion of the stochastic response control of equivalent simplified particle damped systems under seismic excitation and combined numerical analysis as well as experimental studies to verify the feasibility of stochastic vibration analysis of particle damped systems. Based on the analysis of PCB dynamic characteristics, [PERSON] et al. [21; 22] proposed a new structural design for the vibration reduction of extension housing for PCB, in which the discrete element method is used to calculate the system energy consumption of particles, optimize the particle size, filling rate and other parameters, and is combined with experiments to study the influence of particle damping configuration schemes on PCB motion characteristics. [PERSON] et al. [23] introduced a new type of tuned particle impact damper (TPID) and the proposed semi-active damping methodology was confirmed in the cantilever beam vibration experiment, and various damping characteristics captured by the mass of the particle container and particle material with different volumes were given. [PERSON] et al. [24] proposed an energy evaluation model of a particle tuned mass damper (PTMD) attached to a Multi Degree of Freedom (MDOF) structure under wind excitation which is established based on the equivalent simplification method, and the simulation results are verified through wind tunnel tests. It is concluded that the combination of parameters has a significant impact on the energy dissipation performance of PTMD. [PERSON] et al. [25] proposed the concept of a honeycomb damping plate (HCDP) based on particle damping technology to reduce the low-frequency vibration response of wind turbines. The effects of four different particle materials and HCDP positioning on damping, and the effects of single-unit (SU) and multi-unit (MU) HCDP on the frequency response of the generator were also studied. The authors obtained good damping performance in reducing vibration amplitude when using the HCDP concept. Although some research results have been achieved in particle damping, the literature on the damping of pipeline systems is relatively small. According to the structure and load characteristics of the pipeline system, it is of great research significance and important for engineering applications to introduce particle damping technology into vibration damping. In this study, a new particle impact damper for the pipeline system is proposed, and the effect of particle material, filling rate, particle size, damper structure and boundary conditions are investigated experimentally under random excitation. This paper provides an efficient tool for the design and maintenance of pipelines for vibration reduction, which is of great significance and value for pipeline vibration reduction in harsh vibration environments such as ocean engineering, aerospace, etc.