Speed-dependent devices

The OP and OTP series fluid viscous dampers are cylinder/piston assemblies in which the lamination of a silicone fluid through an appropriate hydraulic circuit permits the dissipation of energy. The OTP series, unlike the OP series, permits thermal expansions without remarkable resistance. The typical resulting force-speed constitutive bond is not linear, i.e. F=Cvα, where F is force, C is the damping constant, v is speed, and α=0.15. Force-displacement cycles of a fluid viscous damper in an imposed displacement test with sinusoidal signal. Tests at FIP INDUSTRIALE laboratory on a fluid viscous dampers at Rion-Antirion Bridge (Greece). Fluid viscous dampers installed in the tuned mass damper at the skyscraper Taipei 101 (Taiwan).