The invention discloses a three-cylinder type large-capacity
magneto-rheological
damper for
vibration control of a large
civil engineering structure, which comprises a
magneto-rheological damping cylinder (9), a
puddle damping cylinder (5), an auxiliary cylinder (19), a
magneto-rheological main
piston (23), a
puddle piston (6), a
piston rod (17), a sealing baffle (20), a damping channel (16), a cylinder cover (3) and a spherical
hinge joint (13), wherein magneto-rheological liquid (11) is filled in the magneto-rheological damping cylinder, and an annular
excitation coil (8) capable of generating a
magnetic field is arranged in the magneto-rheological damping cylinder; and the
puddle damping cylinder is arranged adjacent to the magneto-rheological damping cylinder, and elastic puddle (7) is filled in the inner cavity of the puddle damping cylinder, thus the
damper can generate large damping under the condition of large displacement, and the safety of the
damper can be improved. By arranging a displacement splitting mechanism (18), the magneto-rheological damper has high rigidity and large damping in a low-frequency region and has low rigidity and small damping in a high-frequency region. Compared with the traditional magneto-rheological damper with the same size, the maximum capacity of the damper of the invention is improved by more than one time, and the
vibration control of the large
civil engineering structure is more effective.