Characteristics of the function of ice force on vertical cylindrical piles

A lot of tests on ice forces on vertical cylindrical piles are conducted in the ice basin of ice laboratory in Tianjin University to identify the char acteristics of ice forces on fixed platforms in the Bohai Gulf. A function of ice forces is simplified on basis of test data, and the characteristics of the ice forces including the amplitude of the force and the breaking fre quency of the ice sheet is detailed by use of the Fast-Fourier-Transform me thod, The results show that the ice breaking frequency presents a linear re lationship with the ratio of ice moving velocity to ice thickness at low ve locities. At high velocities, the frequency remains constant with the incre ase of the ratio of ice moving velocity to ice thickness. These conclusions are compared those published in literature.