The invention discloses an
electromagnetic vibration reduction device for a quasi-cylindrical
pier of a cross-sea bridge. The
electromagnetic vibration reduction device comprises electrodes, permanent magnets, a magnetic pole connector, an
electrode connector, a housing and an
electrode controller, wherein each
electrode is connected into an annular shape through the magnetic pole connector; each permanent
magnet is connected into an annular shape through the electrode connector; the thicknesses, the inner diameters and the outer diameters of the electrode and the permanent
magnet are the same; the
magnetic poles of two semi-annular permanent magnets in the same annular permanent
magnet are opposite, the upper polarity and the lower polarity of each of two adjacent annular permanent magnets are opposite, and the polarities of two adjacent electrodes are opposite; the housing is arranged outside the electrodes; and the plurality of annular electrodes are connected with the electrode controller through conductive wires respectively. The
electromagnetic vibration reduction device disclosed by the invention is capable of bilaterally controlling a flow field around a
pier stud, effectively suppressing a wake flow vortex generated due to separation of boundary
layers at the two sides of the
pier, and then greatly suppressing the vortex generation vibration of the quasi-cylindrical pier; and meanwhile, the electromagnetic vibration reduction device further has capacities of resisting scouring, resisting an
ocean current impact force and the like to a certain extent.