Vibration suppressing using viscoelastic material

Pao Yue-kong Library Electronic Theses Database

Vibration suppressing using viscoelastic material

 

Author: Cheng, Fan
Title: Vibration suppressing using viscoelastic material
Degree: M.Sc.
Year: 2016
Subject: Vibration.
Damping (Mechanics)
Viscoelasticity.
Hong Kong Polytechnic University -- Dissertations
Department: Dept. of Mechanical Engineering
Pages: vi, 74 pages : illustrations
Language: English
InnoPac Record: http://library.polyu.edu.hk/record=b2910941
URI: http://theses.lib.polyu.edu.hk/handle/200/8595
Abstract: Optimizations of the traditional dynamic vibration absorber (DVA) in single degree of freedom (SDOF) have been well researched by many scholars. However, optimizations of viscoelastic vibration absorber haven't been completed yet. Some researchers use existing material and take the geometrical factor as the optimization parameter, which limits the design efficiency and flexibility. Some others tried to find optimal modulus curves for viscoelastic material, regardless of the limitation of material property. Derivation of fixed-points theory is presented in this thesis. Optimization of viscoelastic dynamic absorber with modified viscoelastic material is proposed, which may be guidance for material engineer to design better material for viscoelastic dynamic absorber. And viscoelastic dynamic absorber with parallel connected spring is proposed, making the viscoelastic dynamic absorber using existing viscoelastic material more effective. The optimization of viscoelastic dynamic absorber with parallel connected spring is also derived, which have been proved to perform better than traditional design, especially under low frequency.

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