Title: Mechanical properties and impact response of disc-spring vibration isolator combined with polyurethane pieces

Authors: Fang Jia; Hongwei Sha; Fancheng Zhang

Addresses: School of Mechanical Engineering, Southeast University, Nanjing 211189, China ' School of Mechanical Engineering, Southeast University, Nanjing 211189, China ' School of Mechanical Engineering, Southeast University, Nanjing 211189, China

Abstract: This study is focused on the mechanical properties and buffer performance of the disc-spring vibration isolator combined with polyurethane (PU) pieces. Finite element model of the isolator, considering the effect of the friction, is established and then simplified by those of its isolation components. Simulation results verified by the experiment reveal that PU piece is capable of lowering the dynamic stiffness of disc springs whilst keeping their static stiffness nearly constant. A mathematical model of the isolator is also built to research the vibration isolation and buffer performance of the variable stiffness vibration isolator. Analysis results indicate that the variable stiffness vibration isolator has a better buffer performance than the constant one. And it also reveals that an optimal damping ratio for the vibration isolation system exists under the same impact force. Our findings are supposed to provide theoretical basis for the design of new combination isolators.

Keywords: disc springs; polyurethane; variable stiffness; finite element method; FEM; damping ratio; nonlinear; mathematical modelling; mechanical properties; impact response; vibration isolation; buffer performance; friction; simulation; isolator design.

DOI: 10.1504/IJISTA.2014.059303

International Journal of Intelligent Systems Technologies and Applications, 2014 Vol.13 No.1/2, pp.117 - 137

Published online: 13 Jul 2014 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article