Dynamic stiffness, or the product of the modal stiffness and damping ratio, is an important consideration for the design of additively manufactured parts that will experience dynamic loading. This paper describes a demonstration component which was designed and manufactured in two configurations using a metal wire arc additive process. The first configuration was an open channel structure, while the second contained a dynamic absorber in the internal cavity. Frequency response measurements of the two components showed a significant magnitude reduction for the modified component at the original open channel structure's natural frequency and an overall increase in dynamic stiffness. Polymer damping material was then added to further increase the dynamic stiffness.

动态刚度，或模态刚度与阻尼比的乘积，是承受动态载荷的增材制造零件设计的重要考虑因素。本文介绍了一个演示组件，该组件使用金属电弧添加工艺以两种配置设计和制造。第一种配置是明渠结构，而第二种配置在内腔中包含动态吸收器。这两个组件的频率响应测量显示，在原始明渠结构的固有频率下，修改后的组件的幅度明显减小，动态刚度总体上增加。然后添加聚合物阻尼材料以进一步增加动态刚度。