Vibration Analysis and Optimization of Composite Structure with Constrained-Layer Damping Treatment

doi:10.7652/xjtuxb201403020

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Vibration Analysis and Optimization of Composite Structure with Constrained-Layer Damping Treatment

更新时间：2025-04-29

- Vibration Analysis and Optimization of Composite Structure with Constrained-Layer Damping Treatment
- Vol. 48, Issue 3, Pages: 108-114(2014)
- 作者机构：
  
  天津大学内燃机燃烧学国家重点实验室,天津,300072
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201403020
  CLC： O32;TH113.1
- Online First：10 March 2014，
  
  Published：2014
- 稿件说明：
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Vibration Analysis and Optimization of Composite Structure with Constrained-Layer Damping Treatment[J]. 2014, 48(3): 108-114.
DOI：

Vibration Analysis and Optimization of Composite Structure with Constrained-Layer Damping Treatment[J]. 2014, 48(3): 108-114. DOI： 10.7652/xjtuxb201403020.

摘要

为了准确获取约束阻尼复合结构(CLD)的振动特性

依据模态应变能(MSE)理论

针对黏弹性材料的温变和频变特性

基于大型通用有限元软件ANSYS及MATLAB进行了联合仿真

研究了CLD矩形薄板的振动特性。通过分析环境温度和阻尼层厚度等设计参数对结构固有频率和模态损耗因子的影响

建立了CLD设计参数的多目标优化模型

利用遗传优化算法对CLD结构参数进行了优化。分析结果表明:随着温度的升高

CLD结构的固有频率下降并趋于稳定; 存在最佳温度点

使得CLD结构的模态损耗因子最大; 在固有频率改变较小的情况下

通过结构参数的优化能够保证CLD结构具有低成本、高模态损耗因子等特性; 联合仿真方法适用于阻尼复合结构振动特性研究

在阻尼减振技术中具有一定的理论和实用意义。

Abstract

A study on structure parameters of constrained-layer damping(CLD)plates was conducted to accurately calculate the vibration characteristics of the CLD structure. The modal strain energy(MSE)iteration method was applied to construct the finite element model of CLD

and co-simulation of ANSYS and MATLAB was adopted to calculate the natural frequencies and loss factors of a rectangular plate with CLD treatment. The effect of environmental temperature and structural parameters on natural frequency and modal loss factors of the CLD plate was analyzed. The multi-objective optimization model of CLD design parameters was established with genetic algorithm(GA). The calculation results show that the natural frequency declines and tends to be stable at a certain value with an increase in the environmental temperature. There is also an optimum temperature at which the loss factor of the plate is maximum. The structural parameters optimization can ensure the characteristics of low-cost

high loss factor for CLD structure with small change of natural frequency. It seems that the co-simulation method is feasible in the vibration characteristics analysis.

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references

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