The invention belongs to the technical field of
vibration isolation, and particularly relates to a quasi-zero stiffness
metamaterial sandwich structure, a
vibration isolation device and a manufacturing method. The quasi-zero stiffness
metamaterial sandwich structure is formed by periodically arranging unit cells in the horizontal direction, and each unit
cell comprises an upper panel, a lower panel, a QZS
resonator core body and a vertical supporting column; the QZS
resonator core comprises a
central mass block, QZS
resonator units are arranged on the upper portion and the lower portion of the
central mass block in a mirroring mode, each QZS resonator unit is composed of two quasi-zero-stiffness unit cells which are arranged in a crossed mode, and each quasi-zero-stiffness unit
cell is composed of a negative-stiffness component comprising a horizontal
curved beam and a positive-stiffness component comprising an oblique straight beam. According to the sandwich structure, the quasi-zero-stiffness resonator of a novel structure serves as a core body, wider application in the ultra-
low frequency vibration reduction field can be achieved, the
band gap is adjustable, and the problems that a traditional
metal base
material structure is high in
band gap frequency and limited in application field can be solved.