A novel composite vibration control method using double-decked floating raft isolation system and particle damper

Abstract

This paper presents a composite vibration control method that uses a double-decked floating raft isolation system and particle dampers to control the severe vibration of a heavy compressor set. In view of the structural characteristics of the compressor set, a mechanical impedance method is employed to investigate the acceleration transfer ratios of the double-decked floating raft isolation system, and to design three isolating schemes. Numerical results indicate that the particle damping technology does not disturb the isolating performance of the double-decked floating raft isolation system while reducing only its acceleration amplitude. To improve the damping performance of particle dampers, an anti-resonance method and a co-simulation technique are used to optimize the installation location of the particle dampers, as the damping effect is related to the vibrating velocity at the damper’s position. Furthermore, two types of particle damper—cylindrical and cuboid—are designed, based on conclusions drawn from experiments using the anti-resonance method. The damping effectiveness of the particle damper scheme is also examined using the co-simulation technique; results indicate that the proposed installation scheme can effectively suppress the vibration of the compressor rack. In addition, the presented schemes using the composite vibration control method are verified and compared in on-site experiments, and results demonstrate that the third isolating scheme presented, combined with particle damping technology, is best in controlling vibration of the compressor set.

Vibration mitigation of L-shaped pipes in different intensity of vibration with particle dampers

“…Although the energy consumption mechanism remains unclear, this method has the advantages of a significant vibration reduction effect, severe resistance to high and low temperature environments, universal direction and high reliability [6]. This method has been widely used in gears [7], mining car cabs [8], vibration reduction raft frames [9], machine tools [10], and in the aerospace [11] field. Particle dampers can be divided into single particle dampers [12] and multi-particle dampers [13] according to the arrangement of particles.…”

Performance and Optimization of a Dual-Stage Vibration Isolation System Using Bio-Inspired Vibration Isolators

“…with complex vibration isolation systems [19][20][21][22][23][24][25], a single-stage vibration isolation system often leads to resonant peaks and standing wave effects at high frequencies [26][27][28][29], which cannot meet the vibration isolation requirements. A dual-stage vibration isolation system draws great interest owing to its better high-frequency effect and higher stability [30][31][32][33][34][35][36].…”

Nonlinear vibration behaviors of marine rotor system coupled with floating raft-airbag-displacement restrictor under ship heaving motion

“…Because the floating raft-airbag vibration isolation device has the characteristics of low natural frequency, large bearing capacity and flexible structure, it is widely applied in the vibration control of marine rotating machinery. 20 For instance, Fang et al, 21,22 Jiang et al, 23 and Lei et al 24 studied the vibration characteristics of rotating machinery coupled with floatingraft-airbag vibration isolation device. Fang et al 21,22 analyzed the vibration transmission characteristics of a floating raft isolation system on the average method to obtain the approximate theoretical solution.…”

“…And Jiang et al 23 took the floating raft active vibration isolation system as the research object and realized effective vibration control based on vibration acceleration and changes in vibration acceleration. In order to control the severe vibration problem of the heavy compressor, Lei et al 24 proposed a composite vibration control method, which used the floating raft isolation system and particle dampers to achieve effective vibration control.…”