铝蜂窝-铅复合阻尼器的试验研究

提出一种铝蜂窝-铅复合阻尼器,设计了2种类型的6个不同参数阻尼器试件,通过低周循环试验研究了其力学性能,揭示它的工作原理和耗能机制,分析了不同参数阻尼器的等效阻尼比、最大剪应力、存储剪切模量、骨架线等性能参数。结果表明,铝蜂窝-铅复合阻尼器具有屈服位移小、变形能力大、工作性能稳定与耗能性能好等特点,同时具有造价低廉、构造简单、安装方便的优点。相对A型阻尼器,B型阻尼器变形能力大,工作稳定,耗能性能优越。对于阻尼器的等效阻尼比、最大剪应力和存储剪切模量等参数,铝蜂窝/铅复合体的方向、高度和孔棱大小影响较大,复合体的片数影响很小。

Experimental Study of Cellular Aluminum Lead Composite Damper

A kind of cellular aluminum-lead composite damper is proposed in this paper. Two types of such damper and 6 damper specimens with different parameters were designed. Through low cycle experiment, its mechanical properties, working principle and energy consumption mechanism were studied. The performance parameters such as equivalent damping ratio, maximum shear stress, storage shear modulus and skeleton line of dampers with different parameters were analyzed. Results show that the cellular aluminum-lead composite damper has characteristics of small yield displacement, big deformation ability, stable working performance and good energy consumption. At the same time, this kind of damper has advantages of low cost, simple structure and easy installation. Compared with type-A damper, type-B damper has more stable working performance, better deformation ability and superior energy consumption. The direction and height of cellular aluminum-lead composite body and the hole edge size have significant impact on the equivalent damping ratio, maximum shear stress and storage shear modulus of damper. However, the number of composite body has little effect on them.