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组合参数对频变自由型垫高阻尼结构振动性能的影响
Effect of combined parameters on the vibration performance of frequency-varying unconstrained stand-off layer damping structure
- DOI:
- 作者:
- 易少强, 吴晓阳, 赵晓明, 魏维
YI Shao-qiang, WU Xiao-yang, ZHAO Xiao-ming, WEI Wei
- 作者单位:
- 武警海警学院 机电管理系, 浙江 宁波 315801
Department of Electromechanical Management, China Coast Guard Academy, Ningbo 315801, China
- 关键词:
- 分数导数模型;自由型垫高阻尼结构;模态应变能迭代法;组合参数;阻尼特性
fractional derivative model; unconstrained stand-off layer damping structure; modal strain energy iteration method; combine parameters; damping characteristics
- 摘要:
- 选择分数导数模型来拟合粘弹性材料的频变特性，通过Matlab与Ansys的相互调用，实现频变悬臂自由型垫高阻尼结构的仿真计算。利用模态应变能迭代法，分析附加层组合参数对系统振动特性的影响，讨论附加层厚度、附加层材料参量对前2阶模态频率和模态损耗因子的影响。分析结果表明：附加层厚度对系统阻尼特性的影响包括垫高层的增益以及阻尼层的耗能总量两方面的综合作用，附加层材料参量对系统阻尼特性的影响主要体现在垫高层弹性模量对阻尼层耗能水平的影响，而垫高层密度影响系统的附加质量，进而影响系统的模态频率，对于系统的模态损耗因子的影响很小。
The fractional derivative model is selected to fit the frequency conversion characteristics of the viscoelastic material, and the simulation calculation of the unconstrained stand-off layer damping structures of the frequency-variable cantilever is realized through the mutual invocation of Matlab and Ansys.The influence of the combined parameters of the additional layer on the vibration characteristics of the system is analyzed by the modal strain energy iterative method, and the influence of the thickness of the additional layer and the material parameters of the additional layer on the modal frequency and modal loss factor of the first two orders is mainly discussed. The analysis results show that the influence of the thickness of the additional layer on the damping characteristics of the system includes the gain of the stand-off layer and the total energy consumption of the damping layer, and the influence of the material parameters of the additional layer on the damping characteristics of the system is mainly reflected in the influence of the elastic modulus of the stand-off layer on the energy consumption level of the damping layer, while the density of the stand-off layer affects the additional quality of the system, which in turn affects the modal frequency of the system, and the influence on the modal loss factor of the system is very small.
2023,45(9): 47-50 收稿日期：2022-11-02
DOI：10.3404/j.issn.1672-7649.2023.09.010
分类号：U668.3
作者简介：易少强(1993-),男,硕士,助教,研究方向为舰船机械振动与噪声控制
