Author(s): Mauri Maattanen
Linked Author(s): Mauri Määttänen
Keywords: No Keywords
Abstract: The bottom-founded tubular steel cylinder-type lighthouse is very sensitive to ice-crushing-induced vibrations. The structure tends to vibrate to the frequencies of its natural modes. Resonant condition is always possible for an ice force with a suitable ice drifting speed. To bring the vibration level down low enough for conventional types of lantern equipment, it is more economical to arrange vibration isolation for the overwater structures than to stiffen underwater structures. An efficient vibration isolation system has been developed and tested using a scale model. Design work is in process for the first full-scale vibration-isolated lighthouse.
Year: 1975