The invention discloses a semi-active particle vibration damping device with a truss structure. The truss structure is connected with a structure to be damped, the vibration damping device comprises magnetic-permeable
metal particles, a coil, a current control module, a vibration
pickup sensor and a direct-current
power module, the magnetic-permeable
metal particles are filled in a hollow
steel tube of the truss structure, the coil is wound on the outer wall of the hollow
steel tube, the current control module is connected with the coil, the vibration
pickup sensor is disposed on the structure to be damped, and the current control module receives vibration signals picked up by the vibration
pickup sensor and controls the direct-current
signal module to output corresponding current to the coil after the vibration signals are processed. The vibration frequency of the structure to be damped can be tracked, the optimal
damping ratio of a particle
damper can be quickly adjusted, and accordingly the
vibration attenuation performance of the semi-active particle vibration damping device within a broader
frequency band range is improved. In addition, the semi-active particle vibration damping device is simple in structure and high in adaptability, and an extra space is omitted.