SU1418435A1 - Dynamic damper of structure oscillations - Google Patents

Abstract

The invention relates to the construction of high-rise structures and can be used to reduce the level of vibrations. The aim of the invention is to provide the possibility of effective damping of the height of structures with a large amplitude and low natural frequency while reducing the dimensions of the damper and. reduce the labor intensity of manufacturing. For this, the inertia mass 1 of the quencher is installed by means of rolling supports in terms of the rollers 2 isa of the guide 3, bent in two mutually perpendicular planes. The inertial mass is connected to the center of the 4 th horizontal projection of the rail 3 by means of m 5 and cardan hinges 6 attached to the structure. The dog masses are placed on the belts 8. The axes of the rollers 2 are set with the centering 4 of the circumference of the horizontal projection of the guide, made with the possibility of changing its curvature in the vertical plane. 3 3. p. F-ly, 5 ill.

Description

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2T

The invention relates to the construction and can be used in high-rise buildings to reduce the level of the collective.

The purpose of the invention is the depletion of the efficiency of effective damping of high-rise structures with high amplitude and low natural frequency while simultaneously reducing the dimensions of damping and cutting, which is labor-intensive.

I FIG. 1 shows a damper, a general view; in fig. 2 shows section A-A in FIG. one; in fig. 3 - section BB 1cha FIG. one; in fig. 4 shows a section B-B in FIG. one; 1 and FIG. 5 - a plate with a dynamic vibration damper, general view. I A dynamic oscillation damper contains an inertial mass 1, mounted ia of the rolling bearings, made in the form of oserebord rollers 2, which move along the guides 3, bent into two interperpendicular planes. Inertial masses 1 are connected to centers 4 circles of horizontal projections of the Guides by means of m 5 and cardan hinges 6 attached to the design 7. The damper is also | equipped with additional inertia masses 8 in the form of a set of plates. The axes 9 1 of the rollers 2 have a misalignment relative to the centers of the circles of the horizontal | projections of the guides, which is provided with the help of adjusting screws 10. To change the curvature of the vertical projections of the guides, there are a number of adjusting devices 11 on which the guides 3 are installed .

In a dynamic damper, the oscillation suppression occurs due to the displacement of inertial mass 1 by means of cordless rollers 2 along curvilinear guides 3, which are inscribed in the dimensions of the site where the damper is located. The guides 3 are curved in two inter-perpendicular planes. To perceive the centrifugal forces arising when the inertial masses of the quencher move along spatial curvilinear guides, they are connected to the centers of the 4 circles of the horizontal projections of the guides by means of t 5 and cardan shafts 6 attached to the protected structure 7, thereby creating additional energy damping oscillations of inertial masses. In order to ensure optimal additional adjustment of the damper to the natural frequency of the structure and to ensure the optimal value of the inertial masses, it is equipped with additional inertial masses 8 in the form of a set of plates. These plates move along horizontal mounts g 5, connecting the main inerts 5

masses 1 with cardan joints b, located in the centers of the circles of the horizontal projections of the guides and fixed to the protected

Designs 7. Plates of additional inertial masses 8 are fixed by means of clamps on thrust 5 at different distances from the axis of the universal joint 6. As the displacement of additional masses changes the radius of the circle of their movement trajectory in the vertical plane, the frequency oscillations of the damper as a whole, due to which its more precise adjustment is carried out.

 The damping of the dynamic vibration damper is provided by friction in the axles of the cardan hinges and rollers, rolling of rollers on the guides, and also sliding of the rollers on the guides due to the alignment of the horizontal axes 9 of the rollers 2 relative to the center of the arc of the horizontal projection of the guide 3 in which the cardan joint 6 is located. The adjustment of the degree of misalignment is carried out by means of a device 10, for example an adjusting screw, which rotates the axis 9 of the roller 2 in plan.

With the help of a number of adjusting devices 11, for example, forcopes, on which the guides 3 are installed, one can change the outlines of the vertical projections of the guides from an arc of a circle whose radius is determined by a tunable natural oscillation frequency of the structure, to a curve that represents several conjugate arcs circles of different radius, providing, if necessary, non-linear characteristic of the quencher.

Claims (4)

1. Dynamic vibration damper 0 of structures, including an inertial mass mounted on rolling bearings with the possibility of moving along curvilinear guides, characterized in that, in order to ensure the possibility of effective damping of vibrations of high-altitude structures with a large amplitude and low natural frequency while reducing the dimensions of the damper and reducing the labor intensity of manufacture, the rolling bearings are made in the form of bezborordnyh Q rollers, and each guide is bent in two mutually perpendicular planes, while the damper is provided with drafts attached to inertial masses connected to the structure by means of Hooke joints installed in the centers 5 circles of horizontal projections of guides. 2. The damper according to claim 1, characterized in that it is provided with additional five 3 inertial masses in the form of a set of plates mounted on the legs with the ability to move along them. 3. The damper according to claim 1, characterized in that, in order to allow damping, the axes of the rollers are set with centering relative to the center of circles of the horizontal projections of the directions 14 1418435 and equipped with a device for controlling the degree of misalignment. 4. A damper according to claim 1, characterized in that, in order to enable it to be tuned to a given oscillation frequency, the guides are provided with adjusting devices for changing their curvature in a vertical plane. Y2 BB Aa L // Fie.2 FIG. FIG. five