Abstract
The particle damping technology is a passive vibration control technique. The particle dampers (PDs) as one of the passive damping devices has found wide use in the field of aeronautical engineering, mechanical engineering, and civil engineering because it has several advantages compared with the forms of viscous damping, for example, structure simplicity, low cost, robust properties, and being effective over a wide range of frequencies. In this paper, a novelty simulation method based on multiphase flow theory (MFT) is developed to evaluate the particle damping characteristics using FEM combining DEM with COMSOL Multiphysics. First, the effects of the collisions and friction between the particles are interpreted as an equivalent nonlinear viscous damping based on MFT of gas particle. Next, the contribution of PDs is estimated as equivalent spring-damper system. Then a cantilever rectangular plate treated with PDs is introduced in a finite element model of structure system. Finally frequency response functions (FRFs) of the plate without and with particle dampers are predicted to study characteristics of the particle damping plates under forced vibration. Meanwhile, an experimental verification is performed. Simulation results are in good agreement with experiment date. It is concluded that the simulation method in this paper is valid.
Highlights
Passive control is preferred due to its simplicity and low power consumption
The primary objective of this paper is to develop a novelty simulation method based on multiphase flow theory (MFT) of gas particle which is capable of rapidly predicting the dynamic response for the complex continuous structure with particle dampers
A novelty simulation method based on twophase flow theory is developed to evaluate the damping characteristics for the continuum structure with particle dampers using finite element method combining discrete element method by COMSOL Multiphysics
Summary
Passive control is preferred due to its simplicity and low power consumption. A common passive control device is the particle damper. Particle damping which is a derivative of single-mass impact damper is a promising technique of providing damping with granular particles placed in an enclosure attached to the vibrating structure [1, 2]. The particle damping can perform well even in severe environments where traditional passive damping methods such as the use of viscoelastic materials are ineffective. Additional benefits of using granular materials instead of a single mass include the elimination of excessive noise and potential damage to the interior wall of the containing hole. Metal particles of high density such as lead or tungsten steel are the most common materials for better damping performance
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