Method and system for calculating ocean internal wave design parameters based on short-term measured data

The invention belongs to the technical field of offshore oil platforms, and relates to a method and system for calculating ocean internal wave design parameters based on short-term actual measurement data, and the method comprises the steps: collecting the actual measurement ocean current data of each layer at different depths, and carrying out the power spectrum analysis; filtering the actually measured ocean current data in a layered manner; separating the filtered actually measured ocean current data into a tidal current component and an internal wave current component according to a power spectrum analysis result; calculating tide flow velocity values and internal wave flow velocity values in different return periods for the separated tide components and internal wave flow components; and combining the maximum tidal current flow velocity value of each layer with the internal wave flow velocity values in different recurrence periods to obtain full-profile internal wave design parameters in different recurr