SMA-based multi-modal adaptive TMDs: model and tests

This paper describes the layout of an innovative adaptive tuned mass damper based on shape memory alloys able to change more than one eigenfrequency at the same time with a given level of independency. Therefore, the adaptive TMD is multi-modal, in the sense that it is able to damp more than one mode of the primary system, and it can also recover the possible changes of the different eigenfrequencies considered for the primary system. The paper explains how to model such a new device, provides details about how the multimode working principle is achieved and, finally, shows the experimental tests which prove the reliability of this type of device.