Vibration Characteristics of Additive Manufactured IWP-type TPMS Gradient Lattice Structures

Lattice structures combined with light weight and better mechanical properties are widely used in the marine and aerospace industries. Therefore, the triply periodic minimal surface (TPMS) lattice structure is chosen as the object of study in this paper. Since there are few studies on the vibration of such structures, the vibration-related properties were investigated by designing positive and negative gradient volume fraction TPMS structures in conjunction with the gradient concept. The sweep and vibration tests show that the designed IWP-type structure can provide vibration isolation in the low frequency range. At resonance the positive gradient structure has a higher resonant frequency due to its higher stiffness, but the negative gradient structure has a higher damping ratio and a wide frequency isolation band gap.