Abstract
A novel coated damping structure for metal rubber (MR) of bellows is designed based on large-size metal rubber sheets. This structure is dynamically tested in the bending direction at normal temperature. According to the test results, a model of the nonlinear elastic restoring force is set up, which describes the dynamic characteristics of the coated damping structure for metal rubber of bellows, and identifies the parameters of the model. The results show that the coated damping structure for metal rubber of bellows has a strong damping energy dissipation ability, its dynamic vibration characteristics are related to the vibration amplitude and frequency, and it is a complex nonlinear hysteretic system with multiple damping components. After identification of the parameters, the model of nonlinear elastic restoring force shows highly accurate results.
Highlights
A flexible connection can properly insulate from the noise produced by vibration of the pipeline system and structures of ships
To achieve more vibration reduction and energy dissipation of bellows, a common viscoelastic damping material: rubber, is often used to improve the vibration and noise reduction performance of bellows based on viscoelastic damping technologies
Ma et al reported that the loss factor of bellows can be increased by using a rubber material with a large thickness and an elastic modulus of 200 MPa through the finite element model of bellows [5]
Summary
A flexible connection can properly insulate from the noise produced by vibration of the pipeline system and structures of ships. Liu et al researched the stiffness and damping of the sandwich damping metal bellows through simulation and experiments. Their results provided a basis for the design of damping bellows [6]. Zhao et al took the nominal diameter 219 mm (DN219) laminated damping bellows as the research object of a vibration test. They pointed out that the viscoelastic damping material can effectively reduce the high frequency vibration of the bellows [7,8]
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