摘要
利用弹性最小势能原理和变分法,推导出弹性-粘弹性复合板的弯曲振动模态密度计算公式, 系统地分析了阻尼层厚度、温度和频率对模态密度的影响规律,得出自由阻尼板的模态密度 随阻尼层厚度增加而增大,约束阻尼板的模态密度随阻尼层厚度增加而减小；自由阻尼板的模 态密度随温度的升高而增大,而约束阻尼板的模态密度受温度影响较小等若干结论.
Based on the theory of elasticity, the formulas of modal density of bending vibration of elastic-viscoelastic composite plate were derived according to the least potential energy and variation principle. The dependence of the modal density on the thickness of damping layer, temperature and frequency parameter was discussed. With the increase of the thickness of damping layer, the modal density of free damping plate increases, but the modal density of constrained damping plate decreases. With the increase of temperature, the modal density of free damping plate increases, but the variety of the modal density of constrained damping plate is very little.
出处
《大连理工大学学报》
EI
CAS
CSCD
北大核心
2001年第1期81-84,共4页
Journal of Dalian University of Technology
基金
高等学校博士学科点专项科研基金资助项目!(1999014103).
