Abstract
Viscoelastic dampers are a kind of classical passive energy dissipation and vibration control devices which are widely utilized in engineering fields. The mechanical properties and energy dissipation capacity of the viscoelastic damper are significantly affected by ambient temperature. In this work, dynamic properties tests of the sandwich type viscoelastic damper at different environmental temperatures are carried out. The equivalent fractional Kelvin model which can characterize the mechanical behavior of the viscoelastic damper with varying frequencies and temperatures is introduced to describe the dynamic properties and energy dissipation capability of the sandwich viscoelastic damper. The self-heating phenomenon of the sandwich viscoelastic damper is studied with a numerical simulation, and the dynamic properties and energy dissipation variation of the viscoelastic damper with self-heating processes are also analyzed. The results show that the dynamic properties of the viscoelastic damper are significantly affected by temperature, excitation frequency and the internal self-generated heating.
Highlights
Viscoelastic dampers are a kind of representative passive energy dissipation and vibration control devices, which are widely used in aerospace, mechanical engineering, civil engineering, high precision instruments, etc. [1,2,3,4,5,6]
It can be seen that the mechanical properties and energy dissipation of the viscoelastic damper are greatly influenced by the excitation frequency, displacement amplitude and ambient temperature
The results show that the viscoelastic damper has better performance of dynamic properties and energy dissipation capacities at low temperature
Summary
Viscoelastic dampers are a kind of representative passive energy dissipation and vibration control devices, which are widely used in aerospace, mechanical engineering, civil engineering, high precision instruments, etc. [1,2,3,4,5,6]. It can be seen that the mechanical properties and energy dissipation of the viscoelastic damper are greatly influenced by the excitation frequency, displacement amplitude and ambient temperature. Tsai et al [7] proposed the finite element model which can consider the strain/displacement amplitude, frequency and ambient temperature influence on the mechanical properties of the viscoelastic dampers. Lewandowski et al [24] utilized the generalized Kelvin and Maxwell model together with the W-L-F equation to characterize the properties of the viscoelastic damper considering the frequency and temperature influence. Inaudi et al [32] experimentally studied the mechanic properties change of the viscoelastic damper caused by heat generation during cyclic external loading, and the seismic responses of the structure with supplemental viscoelastic dampers considering self-generated heating are investigated by numerical simulation. This demonstrates that the dynamic properties of the viscoelastic damper are significantly affected by temperature, excitation frequency and the internal self-generated heating
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