Parameter determination for the Mini-Oscillator Model of the Viscoelastic Material

2019 3rd International Workshop on Renewable Energy and Development

能源学;生态环境科学

Huang, Zhi-Cheng^1 ; Wu, Nan-Xing^1 ; Wang, Xing-Guo^1 ; Zelun, Li^2

Jingdezhen Ceramic Institute, Jingdezhen

333001, China^1

College of Mechanical and Dynamic Engineering, Chongqing University of Science and Technology, China^2

关键词: Constitutive relations;    Dynamic characteristics;    Fractional derivative model;    Parameter determination;    Passive vibration control;    Stress-strain relationships;    Thin walled components;    Viscoelastic composites;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/267/3/032100/pdf
DOI  :  10.1088/1755-1315/267/3/032100

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The viscoelastic composite structure is widely used in the vibration and noise suppression of thin-walled components. The vibration analysis of viscoelastic composite structures must involve the constitutive equation of viscoelastic materials. The form of the constitutive equation of viscoelastic material has a decisive influence on the dynamic analysis process of viscoelastic composite structures. Since the constitutive relation of the viscoelastic material changes with time, frequency and temperature, the analysis of the dynamic characteristics of the viscoelastic composite structure is greatly complicated. The mini-oscillator model considers the frequency-dependent properties of viscoelastic materials. Therefore, it is widely used in the dynamic analysis of composite structures. Aims at the need of viscoelastic material passive vibration control for viscoelastic composite structures, a method for determining the parameters of mini-oscillator model is proposed. The method obtains the viscoelastic material mini-oscillator model parameters by parameter fitting by the measured viscoelastic material complex modulus data in the frequency domain or other viscoelastic material damping model expressions obtained from experimental data. The results are compared with fractional derivative model. The results show that the mini-oscillator model can correctly describe stress-strain relationship of viscoelastic material and the parameter fitting method proposed in this paper is accurate and effective.