Multicell interlacing IWP lattice metamaterials with superior low-frequency vibration isolation performance fabricated by laser powder bed fusion

Abstract

Lattice metamaterials have been proven to be effective for vibration reduction and isolation, but they do not perform well in the low-frequency bands. In this work, inspired by traditional Chinese Taoist concept, multiple IWP-type TPMS lattices are interlaced with each other to achieve low-frequency vibration isolation. The normal IWP lattice (NIL), double interlacing IWP lattice (DIIL), and quadruple interlacing IWP lattice (QIIL) are designed and prepared by the laser powder bed fusion (LPBF) technique. The frequency response and vibration isolation performance of the TPMS lattice metamaterials are analyzed through the dynamic vibration testing and shaft system vibration testing, respectively. The results reveal that the multicell interlacing IWP lattice metamaterials have better low-frequency vibration isolation performance than body centered cubic (BCC) and normal IWP lattices. With the increase of the interlacing-cell number, IWP lattice metamaterials have a better vibration isolation effect in the low-frequency band. Notably, the 316 L QIIL metamaterials have superior vibration isolation performance with the maximum vibration level difference of 47.44 dB. This study offers a new perspective for the application of lattice metamaterials in low-frequency vibration reduction and isolation.