The present invention belongs to the technical field of wind-induced vibration control study of bridges, and provides a dangling net cloth device for suppressing flutter of a sea-crossing bridge, i.e., a large-area dangling net cloth equipped with multiple balance weights, which is suspended below a girder by ropes and is immersed in water . When wind-induced vibration occurs on a bridge, the device is driven to move in the water, and gravity of the device as well as a huge additional mass force and an additional damping force produced by the water on the net cloth will do negative work on the girder to consume vibration energy of the bridge and effectively suppress large vibration of the bridge. The device adopts lightweight standardized components which are convenient to install, detach, transport, and store, and has the advantages of safety, reliability, economy, and practicality.

An anti-vibration device is provided with: an anti-vibration device body, in which an insulator is disposed between a first attachment member and a second attachment member; and a bracket, which has opposing wall portions and to which the anti-vibration device body is fixed by press-fitting via the second attachment member between the wall portions. The second attachment member is provided with interlocking portions that interlock with the wall portions and restrain the anti-vibration device body from moving in the direction opposite the press-fitting direction when the anti-vibration device body is press-fitted to the bracket. Each of the interlocking portions is configured so as to have an arm part extending in the direction opposite the press-fitting direction, and a hook part provided to the extension-direction end of the arm part and caused to interlock with a to-be-interlocked part of one of the wall portions.

A temporary damper assembly for use during vertical storage and/or vertical transport of a tower: includes a liquid damper tuned to the natural frequency of vibration of the tower; a tower cover realized to cover an annular upper opening of the tower during storage and/or transport; a mounting interface configured to suspend the liquid damper from the annular upper opening of the tower; and a load transfer interface for the transfer of loads between the liquid damper and the tower. A method of suppressing vortex-induced vibration in a tower during vertical storage and/or vertical transport of the tower is also provided.

The invention relates to a damping arrangement (100) for a cable (102) extending in a tensioned manner from an anchorage (108), said damping arrangement (100) comprising a rigid damping action transfer device (112) which is positively connected to the cable (102) at a predetermined distance (L1) from said anchorage (108), and at least one damping device (110) extending in a damping manner between said damping action transfer device (112) and a constructional element (106) rigidly connected to said anchorage (108), and connected to said damping action transfer device (112) at a further predetermined distance (L2) from said anchorage (108), said further predetermined distance (L2) being shorter than said predetermined distance (L1).

A multi-mode air shock is disclosed herein. The air shock includes an air spring having a primary air chamber, and a damper having an insertion end to telescope within the primary air chamber and a coupler to couple with a portion of a vehicle. An adjuster housing is fixedly coupled to an end of the air spring opposite of the damper, the adjuster housing having a secondary air chamber in communication with the primary air chamber and a mounting structure to couple with a different portion of the vehicle. There is a bulkhead with a valve to open or close the fluid communication between the primary air chamber and the secondary air chamber. The air shock also includes a tertiary air chamber in fluid communication with the secondary air chamber but not in fluid communication with the primary air chamber except via the secondary air chamber.

A dynamic damper includes: a mass body that is disposed inside a rotation shaft and extends along a shaft center of the rotation shaft; and an elastic body interposed between the mass body and the rotation shaft. Further, the mass body is allowed to vibrate to a linear motion state, the elastic body includes: first and second contact surfaces, when the gear generates vibration so as to fall from a radial direction of the rotation shaft to an axial direction side of the rotation shaft, compressive stress acts on the elastic body by the mass body vibrating so as to push the first contact surface in response to the vibration, and when the gear generates vibration along the axial direction, compressive stress acts on the elastic body by the mass body coming in the linear motion state and vibrating so as to push the second contact surface.

A shock absorber having a shock absorber tube (10) is disclosed and has an external module tube (11) which is connected to the shock absorber tube (10) via a flange (12), wherein the flange (12) has one or more fluid ducts (13, 14) which fluidically couple the module tube (11) to the shock absorber tube (10). The flange (12) has at least one metallic support cage (15) which forms a retentive connection between the shock absorber tube (10) and the module tube (11), and the flange (12) has a plastics body (16) in which the fluid duct (13, 14) for the fluidic coupling of the module tube (11) to the shock absorber tube (10) is formed.

A method of manufacturing a hollow coil spring which is made of a hollow wire in which a terminal sealed portion is formed on an end portion of the wire. The terminal sealed portion has a rotationally symmetric shape in which an axis passing through the center of the wire is the symmetric axis. The hollow coil spring includes an end wall portion, and an end face arc-shaped curved surface. The end wall portion includes an end face perpendicular to the axis. A distal-end-center closure portion is formed on the axis at the center of the end wall portion. A spring seat includes a base member and a sheet member. An end turn portion of the hollow coil spring is in contact with the sheet member. The end face of the end turn portion is opposed to a stopper wall of the spring seat.

A damper unit for use in a vibration-reducing assembly for a steering wheel is disclosed. The damper unit includes a slider configured, upon horn activation, to slide on a guide shaft. A damper element made from an elastomeric material is arranged on a first part of the slider. A molded horn spring element is molded directly on a second part of the slider and is configured to exert a spring force on the slider. The damper unit provides a unitary structure providing both a vibration damping function and a horn spring function in one single assembly unit, reducing the number of components to assemble. A vibration-reducing damper assembly including one or more such damper units is also disclosed, as well as a method of making such a damper unit.

A frictional damper is designed with a tubular housing having a longitudinal axis, with a tappet, which is displaceable in the housing along the longitudinal axis and is led out at an open end of the housing, with a frictional element lying against the tappet and with a cap attached to the open end of the housing with axial prestressing relative to the longitudinal axis.