具有主、被动约束层阻尼的拉压型结构研究

On Active-passive Constrained Layer Damping in Extension and Compression Structures

粘弹性材料已广泛用于阻尼结构的弯曲振动。具有主动与被动相结合的约束层 阻尼技术研究目前也多集中于梁、板等结构的弯曲振动，而主、被动约束层阻尼拉压 型结构则很少研究。本文给出了一种主、被动约束层阻尼拉压型结构模型，推导了一 些数学表达式，给出了优化设计方法及分析结果。

Viscoelastic materials are used extensively to damp fiexural vibrations of metallic structures; nowadays a lot of research is focused on controlling fiexural vibrations of metallic structures. But active-passive constrained layer damping treatment, used in damping extend-compressed vibrations of structures is less considered. An analysis model of active-passive constrained layer treatment used in attenuating extendcompressed vibrations of structures is presented; structural complex loss factor and the optimized cover length formulas are given out. Finally, a numeric example is discussed. The numeric analysis results show that extend-compressed damping treatment is very effective in vibration control.