The ice-induced structural vibration is basically controlled by the value and period of dynamic ice force. For the conical structure, the value of ice force on the upward cone is larger than downward cone and the ice force period is much more complex. Field measurements in the Bohai Sea indicate that the ice force period and broken length of sea ice are mainly determined by the cone shape (upward or downward, width). When the cone is narrow, the dynamic ice force period is significantly different between the upward and downward cones. When the cone is wide, the difference is not significant.

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