Method for optimizing mounting base structure of offshore platform device

摘要

#$%^&*AU2020101263A420200813.pdf#####ABSTRACT The present invention discloses a method for optimizing a mounting base structure of an offshore platform device. The method includes: by using the density of each of a base knee plate, a web plate, a longitudinal keel and a transverse keel of a double-layer bottom in the base structure as an optimization design variable, and a minimum acceleration response amplitude of an evaluation point group at an output end as an objective function, optimizing topological opening of the base under the objective function of the minimum acceleration response amplitude; and by using the thicknesses of a base panel, the knee plate, the web plate, and an upper plate and a lower plate of the double-layer bottom as well as the longitudinal keel and the transverse keel in the base structure as optimization design variables, and the minimum acceleration response amplitude of the evaluation point group at the output end as the objective function, optimizing topological reinforcement of the base under the objective function of the minimum acceleration response amplitude. The present invention has the beneficial effects that a double-layer bottom structure after topological reinforcement and opening are comprehensively optimized greatly improves the vibration damping effect compared with the original structure. 1DRAWINGS FIG.1I FIG. 2 100 ---- Input end 90 -Output end 80 -. - 70 gI ~60 I I 50 I .40 I I ~30 20 I II 10 0 0 100 200 300 400 Frequency (Hz) FIG. 3 1