A liquid sealed damper includes: an attachment portion attached to a peripheral portion of an opening of a vehicle or an opening and closing member for covering the opening; a contact portion to which an external force is input; an insulator configured to isolate vibration and connect the attachment portion and the contact portion; a main liquid chamber in which working liquid is sealed; an auxiliary liquid chamber having a wall portion formed of a diaphragm; and an orifice passage formed in the partition member and communicating with the main liquid chamber and the auxiliary liquid chamber. The partition member has a substantially circular surface forming a wall portion of the main liquid chamber. An opening portion at one end of the orifice passage is formed in the circular surface. The opening portion is formed to extend from an outer edge portion to a central portion of the circular surface.

The present invention relates to a damper module adapted to be secured to a wind turbine tower section, the damper module comprising at least one liquid damper secured to a frame structure, wherein each liquid damper comprises a container comprising an interior volume containing an amount of liquid, wherein the amount of liquid in the interior volume of the container sets a natural frequency of the liquid damper, and wherein the frame structure comprises an interface arrangement configured for, in cooperation with a damper module suspension arrangement in a tower section, securing the damper module to said tower section, and a liquid damper fastening arrangement configured for securing said at least one liquid damper to the frame structure. The present invention further relates to a liquid damper and a tower section having at least one damper module secured thereto.

A system for damping vibration of a tower structure at a selected one or more natural frequencies of the tower structure. The system includes a tank assembly with one or more tanks, and a fluid positioned in the tank to a preselected depth above a floor. The tank includes wall(s) defining an average travelling distance of a wave through the fluid initiated by the vibration of the tower structure at the natural frequency. The system includes one or more inserts located on the floor in the tank for damping movement of the fluid. The preselected depth and the average travelling distance are selected so that the fluid is movable at the selected natural frequency and out of phase with the vibration of the tower structure, to dampen the vibration of the tower structure at the selected natural frequency.

A damper and a load-bearing enclosure having the damper are provided. The damper includes a housing forming a containing cavity and a vibration energy dissipation unit located inside the housing, and the containing cavity includes a liquid storage cavity and a mass body movement cavity located at an upper part of the liquid storage cavity; the vibration energy dissipation unit includes a damping liquid contained in the liquid storage cavity and a plurality of mass bodies located inside the mass body movement cavity; and the mass bodies float on the liquid level of the damping liquid, and an outer surface of the mass body is formed with a plurality of toothed projections for breaking waves formed in the damping liquid due to vibration and dispersing the waves in different directions.

There is provided a device for mitigating physical shock to an object to which it is attached. The device includes a body having a through-bore extending from one end to another. A sliding mass is positioned within the bore hole such that it can slide within the through-bore. A first end cap is slidingly disposed in said body hollow volume at one end of the body, and a second end cap is slidingly disposed at the other. End cap and body combination is filled with a liquid. Responsive to an impact along the body axis, one of the end caps is partially displaced into the body and at least a portion of the liquid changes phase from a liquid phase to a vapor phase.

A liquid inertia vibration eliminator unit for an aircraft having first and second components includes an outer housing coupled to the first component of the aircraft, the outer housing forming an outer housing cavity. The liquid inertia vibration eliminator unit includes a spherical bearing disposed in the outer housing cavity and forming a spherical bearing cavity. A piston is disposed in the spherical bearing cavity and coupled to the second component of the aircraft. Top and bottom fluid chambers are disposed in the spherical bearing cavity on opposite sides of the piston. A tuning passage provides fluid communication between the top and bottom fluid chambers. A tuning fluid moves between the top and bottom fluid chambers via the tuning passage to isolate vibration between the first and second components of the aircraft.

A magnetic liquid damping shock absorber includes a housing, a thermal insulating material layer, a mass block and a magnetic liquid. The housing defines a sealed cavity, the sealed cavity has a first wall face and a second wall face opposite in a first direction and a circumferential wall face located between the first wall face and the second wall face in the first direction. The thermal insulating material layer is provided on an outer surface of the housing, on a wall face of the sealed cavity or in a housing wall of the housing. The mass block is located in the sealed cavity, and the mass block and the housing define a magnetic liquid cavity therebetween. The magnetic liquid is filled in the magnetic liquid cavity.

An energy absorption system, for absorbing an impact energy imparted to a subject upon landing on a surface, includes a mass containment vessel fixed to the subject and a plurality of electromagnets disposed at fixed positions relative to the mass containment vessel. The mass containment vessel may contain one or more mass elements movably disposed therein. A controller may be configured to charge one or more of the electromagnets upon an impact of the subject with the surface to move the mass element(s) toward the surface by electromagnetic force. Alternatively, the energy absorption system may include a pulley system operable to mechanically move one or more mass elements along an axis, a multi-axis joint connecting the pulley system to the subject, and a controller configured to operate the pulley system upon an impact of the subject with the surface to mechanically move the mass element(s) toward the surface.

Stabilization system for a system subjected to external stresses, in particular for a floating support structure, the stabilization system comprising at least three damping devices (1), in form of U-shaped tubes, made up of liquid reserves (2) and a connecting tube (3). At least two of the damping devices are not parallel to one another. The invention further relates to a floating support structure comprising such a stabilization system.

Provided is a wind turbine, including a tower and a damper module, especially a slosh damper module arranged in the tower, which damper module includes a frame with at least two elongated first frame ends at one side of the frame and at least two elongated second frame ends at the opposite side of the frame, which first and second frame ends are fixed to first and second fixation elements arranged at an inner wall of the tower, wherein the first frame ends are immovably fixed to the fixation elements while the second frame ends are fixed sliding relative to the fixation elements, wherein the first and second fixation elements are first and second plates fixed to the and extending horizontal from the inner wall, on which the first and second frame ends comprising flat support areas rest.