SU607911A1 - Arrangement for damping structure vibrations - Google Patents

Description

one

The invention relates to construction and is intended for damping resonant vibrations of structures.

A dynamic vibration damper of the mantling type is known; it has tilters suspended from the construction on multi-strand cables and a support device made in the form of a plate having holes tightly connected with the construction, having holes through which the cables are fixed and rigidly attached. The length of the cables is such that the natural frequency of the mass is equal to the frequency of the fundamental tone of the natural oscillations of the structure 1 j.

A device for damping oscillations containing an oscillating mass in the form of a tandem or a ball is also known. 2.

However, such devices are not; can dampen vibrations of structures that occur simultaneously in two mutually perpendicular directions with different frequencies.

The closest in technical essence and the achieved result to the image is a device for damping vibrations of high-rise structures such as smoke

pipes, masts and radio towers, oscillating under the action of wind load, have a bracket, a t-bar with a rod, a bout and a friction clutch. The plinths are suspended in the upper part along the perimeter of the structure on the brackets. The length of the pendulums of this device is such that their partial frequency is equal to half the frequency of the OSNO tone of the natural oscillations of the structure. The blows of the pendulums are perceived by a boom device, made in the form of a steel ring rigidly attached to the structure's hull and fitted with wooden pads 3J.

However, for damping horizontal oscillations of structures, which occur simultaneously in two mutually perpendicular directions with different frequencies, a separate oscillation damper is required for each direction.

Claims (1)

To increase the efficiency of vibrations of structures in two mutually perpendicular directions and with different frequencies in the device for damping vibrations, having brackets, a bow with a rod. Combat device and friction clutch for coa (Daniia attenuation, aa bracket hinged the frame on which the four clutch is fixed, and the tang rod is clamped in the friction clutch and in its upper part fixed to the hinge frame, which axis is horizontal and perpendicular to the hinge axis frame attachment. In addition, the friction clutch is made in the form of plates in contact with the upper part of the core under the pressure of the spring held by the clamping screw, and the relative position of the hinge of the frame attachment to the brackets and The hinge of the attachment rod to the frame determines the ratio of damped oscillations In Fig. 1, the proposed device is shown, the general view (part of the friction cut on); Fig. 2 shows section A-A in Fig. 1. The device contains a letter 1, Which has a rod 2 attached to the hinges 3 to the frame 4 connected by the hinges 5 to the brackets 6 attached to the structure 7} freeAc It includes the plates 8, the spring 9 and the clamping screw the engaging device 11. The device for damping the oscillations works as follows. In case of low frequency oscillations 7 in the direction of the tangent to the striker part 11, the pilot 1a tuned in this direction to this frequency as a dynamic damper oscillates in the indicated direction, the rod 2 turning in the bows 3, and thanks to The friction 8 in the oscillation-1 (as a dynamic damper) is attenuated. When the structure 7 oscillates with high frequency in the direction perpendicular to the striker 11, | a trunk 1, triple in the STOM direction at this frequency as a shock absorber, oscillates with a collision 9, the structure is perpendicular to the striking part, while the rod 2 with the frame rotates at the hinges 5, the oscillations occur at different amplitudes as simultaneously in two mutually perpendicular directions, hook and separately independently of each other. Compared with existing devices, the use of this device provides effective damping of different-frequency oscillations of building structures and structures in two equally perpendicular directions using a single device that has one master in both directions, which saves in the consumption of materials and structures for manufacture of the device and improves the conditions of placement on the construction of the damper, performing the functions of two dampers. Claim 1, A device for damping vibrations of structures, having a bracket, master with a rod, lively; adaptation and friction to create a damping, which is due to the fact that, with a chain for increasing the efficiency of the shaking of structures in two mutually perpendicular directions and with different frequencies, the frame is hinged on the bracket, on which the friction clutch is fixed, and the mandrel rod is clamped in the friction clutch and in its upper part is fixed to the frame on a hinge, the axis of which is spread in a horizontal plane and perpendicular to the axis, of the hinge of the frame fastening. 2, The apparatus according to claim 1, wherein the clutch is made in the form of plates in contact with the upper part of the rod-under pressure. the spring held by the clamping screw. 3, the Device according to claim. 1, 2, that is, so that when the ratio of the frequency of damping is less than two, the hinges of the frame to the bracket are located above the hinges of the attachment of the rod to the frame. 4, Gruppostao on PP. 1, 2, that is, so that with a ratio of frequencies of suppressed oscillations greater than two, the hinges of the frame fastening to the brackets are located below the hinges of the attachment of the rod to the frame. Sources of information taken into account in the examination: 1, USSR Copyright Certificate No. 38618О, class, F 16 F 15/28, 1973. 2, UK Patent No. 469864, cn, F 2 S, 1935. 3, USSR Author Certificate No. 92985, cl. E O4 B 1/98, 1951. H A-l d) fig.Ch / / I I one ./