Semi-active shock insulation support and shock insulation system

The invention belongs to the technical field of vibration control, and particularly relates to a semi-active shock insulation support and a shock insulation system. The energy dissipation device comprises a first energy dissipation part and a second energy dissipation part, the two energy dissipation parts each comprise a lower support plate and an upper support plate matched with the lower support plate through an arc-shaped guide face, the upper support plate of the first energy dissipation part and the lower support plate of the second energy dissipation part form an integrated piece, and a rotating shaft is rotationally matched with the upper plate face of the lower support plate; a helical gear section is arranged at the shaft body of the rotating shaft, an arch-shaped helical gear is fixed at the lower plate surface of the upper support plate, and the diameter of the arch-shaped helical gear is consistent with that of the arc-shaped guide surface; rotation power of the rotating shaft is given by one of