Disclosed in the present invention is an integrated cost-reducing optimization design method for a support structure of an offshore wind
turbine. Under the condition that a full-field design is given, a cost-reducing optimization design is performed to provide an implementation process and technical means; according to existing
design control factors of an actual project, targeted improvement and an
iterative design are performed by adopting multiple technical means such as: (1) selecting a suitable
machine site, and a wind parameter, a
water depth and a
geological exploration parameter thereof; (2) an integrated load; (3) an
optimal control policy; (4) improving a
damping ratio; (5) a
damper; (6) using a novel
shoot-nail connection; (7) a mud-surface accumulative deformation
algorithm; (8) a large-
diameter pile-soil effect; (9) adjusting a
tower configuration; (10) adjusting a
tower, a basic
diameter and a root distance; (11) releasing a frequency range to 1P and 3P control; (12) refining the
geological exploration parameter; (13) increasing a
diameter-to-thickness ratio; and (14) shortening a
pile length, and a unit-control-
tower-foundation
integrated design can be performed in order to seek a
global optimal design, such that a
design load of the support structure can be effectively reduced, the construction cost of the support structure is reduced, and the kilowatt-hour cost of
offshore wind power is reduced.