The invention discloses a Stewart configuration-based vibration damper. The vibration damper comprises an upper platform, a lower platform, vibration damping assemblies and limiting pieces; the vibration damping assemblies and the limiting pieces are evenly distributed between the upper platform and the lower platform; and the length of each vibration damping assembly when the vibration damping assembly is compressed to the maximum extent is not greater than the limiting length of each limiting piece. The Stewart configuration-based vibration damper is a vibration damper patent of a novel passive element, and is mainly used for marine environments; dual limiting mechanisms are employed to avoid that leaf springs are destroyed by high impact, high loading or horizontal swinging; by structural optimization design, occupied area of surfaces of the platforms is reduced; and compared with a traditional Stewart configuration-based vibration damper, the Stewart configuration-based vibration damper is small in occupied area and compact in structure, and fully utilizes space between the upper platform and the lower platform.

Stewart configuration-based vibration damper

The invention discloses a spring torsion bar type negative stiffness damping device. The spring torsion bar type negative stiffness damping device comprises an outer sleeve, the outer sleeve is internally provided with a clapboard and is internally provided with a double-end screw rod in a penetrated manner, the two sides of the clapboard are provided with inner sleeves, the double-end screw rod is provided with sleeve screw plugs in a sleeved manner to be in threaded connection with the inner sleeves, is in screw thread fit with screw rod screw plugs to be connected on the outer sides of thesleeve screw plugs in an abutted manner and is provided with pressing springs in a sleeved manner with the two ends being connected to the sleeve screw plugs and a baffle in an abutted manner correspondingly, the outer sleeve is provided with strip-type openings, the positions, corresponding to the strip-type openings, on the inner sleeves are provided with lower connection bosses in a protrudingmanner, the side, back to the strip-type openings, of the outer sleeve is provided with two upper connection bosses in a protruding manner, the upper connection bosses are rotatably provided with V-shaped torsion bars, one ends of the V-shaped torsion bars are fixedly provided with transmission vertical columns, the other ends of the transmission vertical columns are hinged to the lower connectionbosses through lower connection rods, and the other ends of the two V-shaped torsion bars are connected through a pulling spring. According to the spring torsion bar type negative stiffness damping device, vibration transmission is effectively reduced by utilizing a pulling and pressing spring combining form, and the spring torsion bar type negative stiffness damping device is convenient and reliable to use.

Spring torsion bar type negative stiffness damping device

The invention discloses a vibration damping device, and relates to the technical field of vibration suppression. The vibration damping device comprises a base, a load platform, a rigidity active adjustable assembly and a damping active adjustable assembly, wherein the rigidity active adjustable assembly comprises a first electromagnetic negative rigidity assembly and a second electromagnetic negative rigidity assembly, the bottom of the first electromagnetic negative rigidity assembly is arranged on the base, the top of the first electromagnetic negative rigidity assembly is connected with theload platform through the damping active adjustable assembly, the bottom of the second electromagnetic negative stiffness assembly is arranged on the base, the top of the second electromagnetic negative stiffness assembly is connected with the load platform through a flange seat, and the damping active adjustable assembly, the first electromagnetic negative rigidity assembly and the second electromagnetic negative rigidity assembly are all powered by the outside. According to the vibration damping device, an electromagnetic negative damping device device is adopted as a damping device activeadjustable assembly, the damping active adjustable assembly is combined, resonance frequency is reduced, and therefore the working frequency band range of the vibration isolation device is widened.

Vibration damping device

The invention provides a vertical supported TMD mounting structure and a construction method. The vertical supported TMD mounting structure is characterized in that brackets are fixedly arranged belowa floor slab, a damper supporting frame is arranged at the bottom of a TMD, and the damper supporting frame is fixedly arranged on the brackets; and a damping structure is arranged between a mass block of the TMD and the damper supporting frame so that the mass block can oscillate in the vertical direction under the influence of the damping structure. During construction, at least two rope penetrating through holes are formed in the floor slab, hoisting frames are arranged above the rope penetrating through holes, and hoisting devices are arranged on the hoisting frames; steel wire ropes of the hoisting devices penetrate through the rope penetrating through holes to be fixedly connected with the damper supporting frame, and the TMD is integrally hoisted; and when the TMD is hoisted to theposition close to the brackets, the TMD is pulled from the side face, the TMD bypasses interference of the brackets in the hoisting process, hoisting continues to be carried out to hoist the TMD to the brackets, and the damper supporting frame and the brackets are fixedly connected. The mounting of the TMD is realized through the steps; the mounting structure attached to the bottom of the floor slab is adopted, and the mounting structure is more compactness and concealment.

Vertical supported TMD mounting structure and construction method

The invention discloses an electromagnetic negative stiffness vibration isolation system based on piezoelectric self-power supply and a control method thereof, and relates to the technical field of vibration suppression. The electromagnetic negative stiffness vibration isolation system based on piezoelectric self-power supply comprises a base, a cylinder, an electromagnetic negative stiffness assembly, a fixing base, a piezoelectric energy capture assembly, a load platform and a circuit system; the lower end of the electromagnetic negative stiffness assembly is connected with the base, the upper end of the electromagnetic negative stiffness assembly extends out of the upper surface of the fixing base, the piezoelectric energy capture assembly is fixed at the upper end of the electromagnetic negative stiffness assembly, and the load platform is arranged at the upper end of the piezoelectric energy capture assembly; and the piezoelectric energy capture assembly is connected with the input end of a rectifying circuit, the output end of a control circuit is connected with the electromagnetic negative stiffness assembly, and a rechargeable battery is used for supplying power to the rectifying circuit, a DC-DC voltage conversion circuit, an energy storage circuit and the control circuit. The system can effectively reduce the natural frequency of the system, not only has a good vibration isolation effect on high-frequency vibration interference, but also can effectively isolate low-frequency vibration of a foundation and the environment, and has the characteristics of self-power collection, power storage and power supply.

Electromagnetic negative stiffness vibration isolation system based on piezoelectric self-power supply and control method thereof

The invention discloses a mass center adjustable mixed type vibration damping platform. The mass center adjustable mixed type vibration damping platform comprises top platforms, a bottom platform, vibration damping units and mass center adjusting units, the plurality of vibration damping units are obliquely arranged between the top platforms and the bottom platform, one mass center adjusting unitis arranged between each vibration damping unit and the top platform, and the mass center adjusting units and the vibration damping units are arranged in the same axial direction; the mass center adjusting units comprise upper screw rods, sleeves and connecting rods, through holes are axially formed inside the sleeves, each of the top and the bottom of each through hole is provided with a thread section, the top ends of the upper screws are connected with the top platforms, the bottom ends of the upper screws are in threaded connection with threaded sections at the tops of the through holes, the top ends of the connecting rods are in threaded connection with the threaded sections at the bottoms of the through holes, and the bottom ends of the connecting rods are connected with the vibration damping units. The mass center adjusting units can realize platform mass center adjustment and pose adjustment, so that the mass center of a rigidity center and the mass center of a vibration damping system (including a vibration damping object and a rigid pedestal) are arranged on the same vertical line, and the vibration damping and vibration isolation effect can be greatly enhanced.

Mass center adjustable mixed type vibration damping platform

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Electromagnetic negative stiffness vibration isolation system based on piezoelectric self-power supply and control method thereof

Mass center adjustable mixed type vibration damping platform