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在标准材料制备工艺条件下,可用材料的密度表征材料的微结构构型。基于该思想,以不同的阻尼层材料密度代表不同的阻尼层材料微结构,针对阻尼层的两种优化构型和优化前的构型,从材料和结构两个尺度层面,实验研究了实际工程中的一种圆形阻尼层合结构的阻尼比随阻尼层材料密度与阻尼层构型的变化。测试得到了给定阻尼层构型时,不同激励幅值和负载质量加载下,结构阻尼比随阻尼材料密度的变化曲线,以及给定阻尼层材料密度时,含有三种不同构型阻尼层的结构的阻尼比随载荷激励幅值的变化曲线。两尺度的实验结果表明:适当的材料设计和结构拓扑优化可以提高圆形阻尼层合结构的阻尼特性;同时也表明:满足工程要求的拓扑优化构型存在多个。
Under standard material preparation process conditions, the material’s microstructure configuration can be characterized by the density of the material. Based on this idea, different damping layer material densities are used to represent the microstructure of different damping layer materials. According to the two optimization configurations of damping layer and the pre-optimization configuration, the practical engineering The damping ratio of a circularly-damped laminated structure varies with the density of the damping layer and the configuration of the damping layer. The damping curves of a given damping layer with different excitation amplitudes and load masses were obtained with different damping amplitudes and the densities of the damping layers with a given damping layer. Structure damping ratio with load excitation amplitude curve. Experimental results at two scales show that proper material design and structural topology optimization can improve the damping characteristics of circular damped laminated structures and also show that there are many topological optimization configurations that meet the engineering requirements.