Active feedforward control of flexural waves in an Acoustic Black Hole terminated beam
نویسندگان
چکیده
Abstract Acoustic Black Holes (ABHs) are structural features that typically realised by introducing a tapering thickness profile into structure results in local regions of wave-speed reduction and corresponding enhancement the damping. In ideal theoretical case, where ABH tapers to zero thickness, reaches wave entering can be perfectly absorbed. practical realisations, however, taper thus remain finite. this obtain high levels damping, is combined with passive damping material, such as viscoelastic layer. This paper investigates potential performance enhancements achieved replacing complementary material an active vibration control (AVC) system beam-based ABH, creating (AABH). The proposed smart consists piezo-electric patch actuator, which integrated place wave-based, feedforward AVC strategy, aims minimise broadband flexural reflection coefficient. To evaluate relative AABH, identical strategy also applied beam constant termination. It demonstrated through experimental implementation, AABH able achieve equivalent system, but lower computational requirement effort, offering significant benefits.
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ژورنال
عنوان ژورنال: Smart Materials and Structures
سال: 2021
ISSN: ['0964-1726', '1361-665X']
DOI: https://doi.org/10.1088/1361-665x/abd90f