【摘要】 根据模态应变能理论建立约束阻尼结构有限元模型,基于粘弹性层的厚度和部分材料参数随机性分析,对约束阻尼结构的振动特性进行研究,分析粘弹性层的厚度和部分材料参数的随机性对约束阻尼结构模固有频率和模态损耗因子的影响。研究结果证明粘弹性结构参数随机性分析的必要性,分析方法和得出的相关结论对工程实践有一定参考。更多还原

【Abstract】 In this paper the finite element model of constrained damping structure was established based on modal strain energy theory.In study of vibration characteristics the effects of the thickness of viscoelastic layer and randomness of material parameters on natural frequencies and modal loss factors of constrained damping structure were analyzed.The results show that the analysis of material parameter rendomness of constrained damping structure is necessary,the analysis method and conclusions made in this paper may be benefits for engineering practice.更多还原