Equivalent model of a multiparticle damper considering the mass coupling coefficient

• Published in: Structural control and health monitoring Vol. 27; no. 8
• Main Authors: Huang, Xu‐hong, Xu, Wei‐bing, Yan, Wei‐ming
• Format: Journal Article
• Language: English
• Published: Pavia John Wiley & Sons, Inc 01.08.2020
• Subjects: Adaptability; Civil engineering; Computer simulation; connection stiffness; Coupling coefficients; Damping; dual‐mass equivalent model; Earthquake dampers; Earthquakes; Equivalence; Harmonic excitation; mass coupling coefficient; Mechanical properties; Model accuracy; multiparticle damper; Particle motion; Seismic activity; Shake table tests; Stiffness
• ISSN: 1545-2255; 1545-2263
• DOI: 10.1002/stc.2580

Summary The application of the particle damping technology in civil engineering is limited owing to the complex nonlinear mechanical properties and lack of a reasonable mechanical model. The existing equivalent single‐particle model cannot include the interactions between particles. In addition, an appropriate determination of parameters is required. In this study, to consider the influence of the interactions between particles, a dual‐mass equivalent model (DMEM) is proposed based on a particle motion state analysis. A shaking table test on a single‐story frame under a harmonic excitation was carried out to verify the rationality of the model. The variations in connection stiffness k and damping coefficient c with the filling ratio were evaluated. Experiments under earthquake excitations were carried out to verify the adaptability of the model. The comparison between the DMEM and the existing equivalent model was also conducted to verify the simulation accuracy of the model. Then, the effect and mechanism of the multiparticle damper were analyzed based on the DMEM with the optimal stiffness k. The mass coupling coefficient had significant effects on the damping and mechanism of the multiparticle damper. Although it is different from the actual multiparticle damper, the proposed DMEM is of significance for the further development and applications of multiparticle dampers in civil engineering.