FLOATING WARNING SIGN OF PRESET STABILITY AND SURGEPROOF Russian patent published in 2008 - IPC B63B22/00 B63B22/16 

FIELD: engines and pumps.

SUBSTANCE: architecture design and major dimensions of a floating warning sign (FWS) are determined by necessity to partially neutralize tearing-off wave forces and roll of FWS by means of a passive-active leaf damper not deeply submerged. A draft T_SB of FWS is accepted within 0.6-1.2 of a specified wave amplitude depending on the preset ratio of neutralization 0≤n≤0.5 of wave forces The damper has a cone shape and is made of a thin sheet with a bias of 20-30° to horizon An outer edge of the damper is rounded with a radius of 0.05-0.1 of the radius of the damper surface horizontal projection A middle of the damper cone surface is distanced from undisturbed water surface at T_LD =(0.7÷0.8)T_SB. A core disk of solid ballast is attached to the bottom of the FWS and additional disks are attached to the core disk by means of pins The middle value of the FWS case diameter, dimensions of dampers, a required number of solid ballast and displacement of FWS as a whole are specified by sequential decision of algebraic equation system.

EFFECT: to decrease mass of a floating warning sign at preset surge proof.

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