The invention relates to an assembly method for a vibration damper of a tower of a wind power plant, in which the vibration damper is switched into a transport state from a state of use. The vibration damper is connected to a structural component of the tower such that a damper mass of the vibration damper can be set in motion, during which movement the distance between the damper mass and a central axis of the tower varies. The vibration damper is switched into the transport state by tilting the vibration damper compared to the state of use. The invention also relates to an associated assembly system.

A system, device and method for reducing wind-induced vibration using cladding includes one or more movable panels attached to an outer façade of a high-rise building, skyscraper or any other structure subject to wind-induced vibration.

A sliding seismic isolator includes a first plate attached to a building support, and an elongate element extending from the first plate. The seismic isolator also includes a second plate and a low-friction layer positioned between the first and second plates, the low-friction layer allowing the first and second plates to move freely relative to one another along a horizontal plane. The seismic isolator also includes a lower support member attached to the second plate, with a biasing arrangement, such as at least one spring member or at least one engineered elastomeric element, which can include one or more silicon inserts, positioned within the lower support member. The elongate element extends from the first plate at least partially into the lower support member and movement of the elongate element is influenced or controlled by the biasing arrangement.

The present invention relates to an impact damper assembly for damping oscillations of an associated tower structure, the impact damper assembly comprising one or more impact dampers each comprising a suspension arrangement adapted to be suspended between at least two vertically distanced suspension positions of the tower structure, an impact mass secured to the suspension arrangement, the impact mass being adapted to collide with the tower structure in response to movements thereof, and a tensioner adapted to apply a defined tension to the suspension arrangement in order to adjust the damping characteristics of the impact damper. The present invention further relates to a wind turbine tower having an impact damper assembly attached thereto and a method for damping tower structure oscillations using an impact damper assembly.

The present invention relates to a system for identification and active control of vibrations (101) in a structure (103), 11 comprising at least one inertial device (102) associable with the structure (103), comprising at least one movable mass (104) and configured for a first controlled movement of the at least one movable mass (104) in order to excite the structure (103); one or more movement sensors (201) configured for detecting vibrations of the structure (103); at least one processing device (202, 302) operatively connected to the one or more movement sensors (201) and to the least one inertial device (102), the at least one processing device (202, 302) being configured for: identifying a set of first parameters determinable by the one or more movement sensors (201) in response to environment-induced vibrations of the structure (103); identifying a set of second parameters determinable by the one or more movement sensors (201) in response to the first controlled movement of the at last one movable mass (104); calculating a dynamic model, wherein the set of first and second parameters are made consistent taking into account the at least one movable mass (104); detecting threshold-exceeding vibrations of the structure (103) by the one or more movement sensors; controlling the at least one inertial device (102), wherein the at least one inertial device (102) is further configured for a second controlled movement of the at least one movable mass (104), based on the dynamic model. The present invention further relates to a respective method for identification and active control of vibrations in a structure.

A building earthquake resistance structure includes an integrally connected roof support frame, used for supporting a roof of a building independently from walls of the building; a plurality of support columns, fixedly connected to the roof support frame; an annular trench, arranged in the ground around the building; an annular damping came, arranged within the annular trench, lower ends of the support columns being fixedly connected to the annular damping frame; a plurality of dampers, arranged between a bottom portion of the annular trench and the annular damping frame. An earthquake resistance method for the building earthquake resistance structure prevents damage caused by the roof collapsing during an earthquake by supporting the roof of the existing building in the ground via the support columns. The building earthquake resistance structure is easy to construct and suitable for transforming traditional old buildings.

A building earthquake resistance structure includes an integrally connected roof support frame, used for supporting a roof of a building independently from walls of the building; a plurality of support columns, fixedly connected to the roof support frame; an annular trench, arranged in the ground around the building; an annular damping frame, arranged within the annular trench, lower ends of the support columns being fixedly connected to the annular damping frame; a plurality of dampers, arranged between a bottom portion of the annular trench and the annular damping frame. An earthquake resistance method for the building earthquake resistance structure prevents damage caused by the roof collapsing during an earthquake by supporting the roof of the existing building in the ground via the support columns. The building earthquake resistance structure is easy to construct and suitable for transforming traditional old buildings.

The present invention relates to a damper unit for damping oscillations of a tower structure when secured thereto, the damper unit comprising a damper unit structure adapted for attachment to the tower structure, a pendulum structure, a suspension arrangement for suspending the pendulum structure from the damper unit structure such that the pendulum structure is allowed to displace from a neutral position for the pendulum structure, the suspension arrangement comprising one or more wires for suspending the pendulum structure, a sensor adapted for measuring oscillations of the tower structure, and tuning means configured for adjusting the natural frequency of the suspended pendulum structure in response to measured oscillations of the tower structure. The present invention further relates to an associated method.

An oscillation damper may comprise a suspension having a suspension length. The oscillation damper may comprise a pendulum which may be suspended by the suspension and may have a pendulum mass. The pendulum may comprise a fixed part which may have a side face. The pendulum may comprise a slideable part for collision with a movement limiter. The slideable part may be a substantial portion of the pendulum mass. The slideable part may comprise one or more stacked plates which may be positioned on the fixed part, and the one or more plates may extend beyond the side face. The oscillation damper may comprise a movement limiter. The movement limiter may face the pendulum.

A variable acceleration curved surface spiral gear transmission mechanism for accelerated oscillator damper damping systems is disclosed. Through the orthogonal orbit planetary gear set moving along the parallel circular arc line guide rail, the concave surface spiral gear and the convex surface spiral gear are meshed at different radii, so as to realize the continuous changing of the speed ratio and changing of the acceleration of the additional mass block. The spiral curve limit guide groove is set on the surface of concave surface spiral gear and convex surface spiral gear, and the changing rate of speed changing ratio is adjusted by designing different spiral curves, and then the acceleration changing rate of additional mass block is controlled.