Power flow analysis for a floating sandwich raft isolation system using a higher-order theory

Abstract

A higher-order sandwich theory is implemented in conjunction with an equivalent mobility-based power flow progressive method to determine power flow for a sandwich configured floating raft vibration isolation system. The power spectrum changes in whole frequency range effectively when core materials' properties change. It is also shown that the loss factors of the sandwich configured floating raft influence the power flow transmitted to the foundation effectively in the medium-to high-frequency range and that the resonant peak cannot be avoided by increasing damping only in highfrequency ranges which is not found in floating raft isolation systems with isotropic beams. r

Vibratory Power Flow Analysis of a Gear‐Housing‐Foundation Coupled System

“…Research objects have been developed from rigid models [15,16] to flexible ones [17][18][19], and the performance index has been developed from force or velocity indices [20][21][22] to power flow indices [17,18,23]. Du [24] found that the force transmissibility increased 20∼30 dB, and the noise radiated by the foundation increased about 22 dB when wave effects of isolators are considered.…”

Analysis of the input power flow characteristics of cylindrical shells with combination boundaries

“…Much of research results about vibration power flow problem were carried out. Choi et al 10 applied higher order sandwich theory in conjunction with an equivalent mobility-based power flow progressive method to determine power flow for a sandwich-configured floating raft vibration isolation system. For the submerged cylindrical shells, the wave propagation approach was often used to study the vibro-acoustic problem.…”

Vibration control of the finite L-shaped beam structures based on the active and reactive power flow

“…She found that the in-plane motions had significant effects on the power flow in median and high frequencies. Choi et al [29] presented a higherorder sandwich theory in conjunction with an equivalent mobility-based power flow progressive approach to determine power flow for a sandwich configured floating raft vibration isolation system.…”

“…As the error is inevitable in practical applications, to study the effects of the error of control force on the control results becomes necessary. Moreover, the active power flow in the beams and plates is much studied [21][22][23][24][25][26][27][28][29][30][31][32][33], with few reports on the reactive power flow in finite structures.…”