约束阻尼结构约束材料优化选择研究

Optimal Selection Study on Constrained Material of Constrained Damping Structure

在自由阻尼结构的基础上,建立了约束阻尼结构的振动方程并对方程进行求解。对比约束阻尼结构和自由阻尼结构的振动特性,证明了附加一层约束层可大大提高结构的损耗因子。研究了约束层材料力学性能参数对结构振动特性的影响,结果表明约束层弹性模量对结构振动特性影响较大,材料优化选择的结果也与工程实际中应用的材料基本一致,研究结果可对结构阻尼减振设计时约束材料的选择提供理论支持。

Based on the free damping structure, the vibration equations of constrained damping plate are established,and the equations are solved. The vibration performance of constrained damping structure is compared with that of free damp-ing structure, and it is proved that the loss factor can be improved greatly with an additional restraint layer. The influence ofmechanical property parameters of constrained material on structure vibration performance is analyzed. The results show thatthe elastic modulus of restraint layer have great influence on structure vibration performance. The optimal material selected bythis study is in accord with engineering practice, so this research can provide a theoretical support for the selection of con-strained material in vibration reduction design of structure damping.