Device for protection of building structures from dynamic vibration impact

 

(57) Abstract:

Usage: protection of building structures from dynamic vibration impacts. The inventive device includes a frame mounted on legs. In the box through flexible links suspended platform. Flexible connections are arranged horizontally and are at the ends of the hinges. Equipment, stimulating dynamic vibration load placed on the platform. The options boxes assigned from the conditions under which optimum system operating mode vibration absorption. 3 Il.

The invention relates to the construction and can be used in the design of vibration isolation systems and vibration protection of structures, machines and mechanisms with dynamic or seismic responsibility.

Known vibroisolating design, including the Foundation box is rigidly secured on the brackets with the guides for the translational motion, the base block mounted in the base case with gap, sliders, each of which is mounted in the respective guide rail is rigidly connected at one end with the base unit, and the shock absorbers disposed between the base frame and the base, and vertical upper and lower harnesses and horizontal stops interacting with the radial rods, and radial rods rigidly attached to the lateral surface of the sleeve and the top and bottom strands are twisted in opposite directions and are attached respectively at one end to the upper and lower bases of the sleeve, and the other to the bracket fundamental boxes and slider [1]

The downside of it is the complexity of the design decisions, the inability to control the dynamic parameters, increased consumption.

Closest to the proposed invention, taken by the applicant for the prototype is design [2] including the outer box, in which through the spring and additional links suspended from a support block under the equipment, and the dampers are placed between the side surface of the support block and boxes. In addition, the Foundation provided a mechanism for regulating the tension links, and additional communications made in the form of filaments or rods, and a spring connection strained to the value assigned to the conditions ensure the horizontality of the support block when stationary equipment, and flexible strained to the extent of naznachyenii equipment.

The disadvantages of this device are the inability to control the dynamic characteristics of the system in a wide range, ignoring the stiffness of the outer duct, leading to inefficient allocation of materials, the use of dampers and other springs, which casts doubt on its use in conditions of high and low temperatures.

The aim of the invention is the protection of structures against dynamic effects, improving the efficiency of the device and reduce its consumption.

This objective is achieved in that the device for protection of building structures from dynamic vibration impacts, including trunking and suspended therein by means of a flexible parallel relationship with the hinges at the ends, the platform on which the equipment is installed, stimulating dynamic vibration load, has a box mounted on legs, bending stiffness which in cross-section coinciding with the attachment thereto of flexible connections, is determined from the relation:

EoIoyo-oxjR where EoIoFlexural rigidity of the shell-boxes in the longitudinal direction;

Eomodule deficient transmission dynamic component of the force, transmitted unbalanced piece of equipment on a support structure;

M the mass of the rotating parts of the equipment, shell boxes and flexible links;

R the forced oscillation frequency of the vibrator, part of the hardware;

cithe coefficient of rigidity of the flexible connection;

yo,othe deflection and the rotation angle of the left outer end wall of the enclosure;

N number of flexible links;

Rireactions in flexible connections from a single force applied at the center of mass of the system;

ri, xjthe distance horizontally from the left outer end wall of the enclosure to the flexible connection, and to determine the Flexural rigidity of the boxes, respectively.

The invention consists in that the connection device of the main structural elements in a parallel-series system stiffness with an appropriate choice of the design parameters trunking can provide optimum vibration absorption system by protecting structures from dynamic effects.

In Fig. 1 is a schematic diagram of the device of Fig. 2 is a side view, and Fig. 3 mechanical model of device.

Offer protection device p is 1, supported on the support 2, the platform-frame 3 with on her dynamic equipment 4, which by means of flexible connections 5 via a hinge 6 is attached to the shell 1.

Mechanical model of the device is represented in the form of the device with one degree of freedom, the integral stiffness coefficient which is determined by the formula:

c where C is the integral coefficient for the system;

WITHaboutthe coefficient for the shell-box;

Cithe coefficient of rigidity of the flexible connection;

N number of flexible links.

Changing the stiffness coefficient of the shell WITHaboutcan be in a wide range to change the stiffness coefficient of the system when Co__ 0 C __ 0 Cabout= Ci. (C= 0.5 Ciand when Co__ C= Ci. The smaller the coefficient of rigidity of the shell, the less the stiffness coefficient of the system.

In known devices and analog prototype is considered only for the case when Cabout__ i.e., sheath-box obviously is considered to be absolutely rigid and its influence on the natural frequency is measured only by its mass. In the proposed device, sheath-box is used not only as the added mass, but also as an element of end zhestkosti">

During operation of the device sheath-box 1, joining in the General scheme of the rigidity of the device affects the natural frequency of the system. Taking as a criterion characterizing the effectiveness of vibration isolation, the transmission coefficient can limit the stiffness coefficient of the system and, given that the shell-box 1 and a flexible connection 5 form a parallel-series system, to limit the stiffness coefficient of the shell-boxes, resulting dependencies:

C MP C

The influence of the rigidity of the shell-boxes 1 to the frequency of natural oscillations of the system is estimated by moving the points of attachment thereto of flexible connections 5. Combining the coordinate system origin with the left end of the casing frame 1, determine the displacement of the j-th flexible connection 5 in the place of its attachment to the shell from a single force applied at the center of mass system, the expression:

yj=yo+xj+ R

The reciprocal movement of yithere is a stiffness coefficient of the shell WITHabout. Then the Flexural rigidity of the shell-boxes 1 corresponds to the transmission factor if

EoIoyo-oxR

Asking the gear ratio and selecting the design parameters of korobkinstilo from dynamic vibration exposure in the most rational, economically use the materials used.

DEVICE FOR PROTECTION of BUILDING STRUCTURES FROM dynamic vibration IMPACTS, including trunking and suspended therein by means of a flexible parallel relationship with the hinges at the ends, the platform on which the equipment is installed, stimulating dynamic vibration load, characterized in that the duct is installed on supports, and the Flexural rigidity of the enclosure in cross-section coinciding with the attachment thereto of flexible connections, determined from the relation

< / BR>
< / BR>
where EoIo- Flexural rigidity of the shell-boxes in the longitudinal direction;

Eo- modulus of 1 type of material of the shell-box;

Io- moment of inertia of the cross section of the shell-box;

- transfer coefficient of the dynamic component of the force transmitted unbalanced piece of equipment on a support structure;

M is the mass of the rotating parts of the equipment, shell-boxes and flexible links;

P is the frequency of forced vibrations of the vibrator, part of the hardware;

Ci- coefficient of rigidity of the flexible connection;

yo,othe deflection and the rotation angle of the left outer end wall of eloundou at the center of mass of the system;

rixj- the horizontal distance from the left outer end wall of the shell-boxes to the flexible connection, and to determine the Flexural rigidity of the shell-boxes, respectively.

 

Same patents:

The invention relates to the construction, namely, to designs of collapsible structures that are used in different sectors of the economy, for example, hangars, storage of various materials, including hazardous

Concrete base // 2055119
The invention relates to construction machinery, namely reinforced concrete machine frames and bases

The invention relates to a means of protection against vibration low-frequency horizontal vibrations of foundations for machinery

The invention relates to the construction and relates vibroisolating of foundations for dynamic loads

The invention relates to the construction, and in particular to methods of construction of foundations for equipment

FIELD: construction, particularly new building erection and existent building reconstruction under any engineering-geological circumstances.

SUBSTANCE: foundation structure comprises shallow foundation and reinforcement members. Reinforcement members are made as vertical bars of precast or cast-in-place piles having diameters less than 200 mm and arranged along foundation perimeter. The piles are spaced a distance from outer foundation faces. The distance is equal to 0.1-0.5 of reinforcement member diameter. Distance between neighboring piles is equal to 2-4 reinforcement member diameters and reinforcement member length is 15-20 diameters thereof.

EFFECT: increased load-bearing capacity due to creating compressive operational conditions under different engineering-geological circumstances, increased dynamic rigidity of foundation base and reduced foundation deformation and vibrational amplitude.

9 dwg

FIELD: mechanical engineering, particularly large electrical machines and foundations for turbogenerator and hydraulic generators.

SUBSTANCE: foundation slab comprises stator body base including support part connected with foundation. Arranged between support part and foundation is damping panel including reinforcement formed as vertical rods. Foam plastic member is put on the vertical rods and grouted with concrete grout. Vertical rods are connected one to another in horizontal plane with wire arranged at least in two levels in vertical plane of damping panel. Vertical rods extend through support part, pass into stator body base and into foundation.

EFFECT: reduced dynamic pressure applied to foundation slab and increased structural rigidity.

1 dwg

FIELD: vibration protection means for building industry, particularly vibroinulated foundations for machines, engines, or ordnance.

SUBSTANCE: vibroinsulated foundation comprises bath and foundation block arranged in the bath so that the foundation block is spaced from bath walls and bottom. The foundation block is higedly connected with bumpers, which in turn are attached to foundation block by means of hinged lever. The lever connects foundation block with support member of bumper. The bumper has pendulum suspension means and comprises compression spring cooperating with the base and with the pendulum suspension means. The pendulum suspension means is made as threaded rod connected to spherical washer formed on one end thereof and with threaded bush also attached to spherical washer end not connected with threaded rod. The spherical washers cooperate with not less than 3 balls located on conical surfaces of support members and cooperating with upper spring end and object to be protected against vibration correspondingly. Buffer limiting elastomeric members are installed in base.

EFFECT: increased efficiency of vibration protection and simplified foundation structure.

2 dwg

FIELD: vibration protection means for building industry, particularly vibroinulated foundations for machines, engines, or ordnance.

SUBSTANCE: vibroinsulated foundation comprises bath and foundation block arranged in the bath so that the foundation block is spaced from bath walls and bottom. The foundation block is higedly connected with bumpers, which in turn are attached to foundation block by means of hinged lever. The lever connects foundation block with support member of bumper. Bumper has resilient member formed as two serially connected elastic resiliently-damping members divided with washer. Pendulum suspension means of the bumper is made as threaded pin having the first end connected to hinged lever and the second end connected to nut and thrust washer, which are connected to bush. The bush is attached to resilient member. The thrust washer is made of resilient material. Resiliently-damping member is formed as pleached strands or tangled wires.

EFFECT: increased efficiency of three-dimensional vibration protection and simplified foundation structure.

2 dwg

FIELD: vibration protection means for building industry, particularly vibroinulated foundations for machines, engines, or ordnance.

SUBSTANCE: vibroinsulated foundation comprises bath and foundation block arranged in the bath so that the foundation block is spaced from bath walls and bottom. The foundation block is higedly connected with bumpers, which in turn are attached to foundation block by means of hinged lever. The lever connects foundation block with support member of bumper. The bumper has pendulum suspension means made as threaded rod with spherical profile on one rod end and threaded bush also having spherical profile. Both spherical profiles cooperate with conical surfaces of upper and lower plates correspondingly. Resilient member is made as serially connected resilient discs connected with outer bush surface along inner disc diameters. One bush end is fixedly secured to the base, another bush end is slidably installed in guiding bush.

EFFECT: increased efficiency of three-dimensional vibration protection and simplified foundation structure.

2 dwg

FIELD: vibration protection means for building industry, particularly vibroinulated foundations for machines, engines, or ordnance.

SUBSTANCE: vibroinsulated foundation comprises bath and foundation block arranged in the bath so that the foundation block is spaced from bath walls and bottom. The foundation block is higedly connected with bumpers, which in turn are attached to foundation block by means of hinged lever. The lever connects foundation block with support member of bumper. The bumper has pendulum suspension means made as threaded rod with spherical profile on one rod end and threaded bush also having spherical profile. Both spherical profiles cooperate with conical surfaces of upper and lower plates correspondingly. Resilient member is made as serially connected resilient disc means formed as disc springs connected with each other along outer diameters by means of ring having T-shaped profile and along inner diameters by means of ring having inner surface cooperating with outer bush surface. One bush end is fixedly secured to the base, another bush end is slidably installed in guiding bush.

EFFECT: increased efficiency of three-dimensional vibration protection and simplified foundation structure.

2 dwg

FIELD: vibration protection, particularly to erect vibroinsulated foundations for machines and equipment subjected to dynamic loads.

SUBSTANCE: vibroinsulated foundation comprises bath, foundation block arranged in the bath so that the foundation block is spaced from bath walls and bottom and is pivotally connected to vibroinsulators. Each vibroinsulator is attached to foundation block by means of pivoted lever, which connects foundation block with support member of vibroinsulator. Each vibroinsulator has pendulum hanger made as threaded rod with spherical profile on one end thereof and comprises threaded bush fastened to the rod and having spherical profile. Both spherical profiles cooperate with conical surfaces of support vibroinsulator member and upper conical bush correspondingly. The resilient member of vibroinsulator is made as a number of serially connected resilient elements secured to bush along outer diameters thereof. The bush is fixedly connected to vibroinsulator base. Inner resilient element diameters are attached to bush, which encloses rod. One bush end abuts the last resilient element, another end cooperates with upper conical bush. Each annular resilient element may be formed as at least two flat resilient coaxial rings, namely inner and outer ones, which are fastened with each other by at least three resilient flat plates or resilient rods having round or polygonal sections. Each annular resilient element may be formed of at least two flat coaxial resilient rings, namely of upper and lower ones, connected with each other by at least three resilient flat plates, which are inclined to ring axes, or resilient rods having round or polygonal sections.

EFFECT: increased efficiency of volumetric vibroinsulation and simplified structure.

3 cl, 5 dwg

FIELD: construction.

SUBSTANCE: invention is related to means of protection against hazardous effect of vibration and may be used in construction, in particular in arrangement of vibration-insulated foundations for machines and equipment with dynamic loads. Foundation on vibroprotective elements comprises bath, foundation unit arranged in it with clearance versus walls and bottom and hingedly joined to vibration isolators installed in bath bottom. Vibration isolators are joined to foundation unit by means of hinged lever, which connects foundation unit to support element of vibration isolator, which comprises elastic element, body and pendulum suspension. Body is arranged in the form of box with lower base and upper plate with hole for threaded pin of pendulum suspension, which are connected to each other by three side ribs, with creation of window for accommodation of support lever, on which vibration-insulated object is arranged. Elastic element is arranged in the form of three serially connected elements: elastic ones and elastic-damping element arranged in between. Elastic elements with one of their bases are installed in bushes, which are fixed accordingly on upper plate of body and cover, and rest against washers with their other bases, and washers are joined with elastic-damping element. Pendulum suspension is arranged in the form of threaded pin, which is connected by one end to support lever for fixation of vibration-insulated object, and by other end - to nut and thrust washer, which is joined to cover attached to elastic element. Elastic-damping element is arranged in the form of steel-wire weaving or metal thread waste.

EFFECT: increased efficiency of spatial vibration insulation and simplified design.

2 dwg

FIELD: construction.

SUBSTANCE: inventions relate to the field of foundation engineering of deep burial for important objects, such as nuclear power plants. Method for erection of nuclear power plant foundation consists in engineering-geological survey with detection of soil foundation layers depth, which complies with depth of active compressing thickness H, its physical-mechanical properties: angle φ of inner friction, c - specific adhesion, γ - density, E0 - module of common deformation, µ0 - coefficient of Poisson, which correspond to design elastic compressing load under deep buried foundation, in erection of mine pit with shape that corresponds to foundation, filling of filled layer of soil onto mine pit bottom and its compaction, erection of curb with reinforcement frame inside and its filling with high grade concrete. Foundation, which is solid in plan, is given convex spherical shape, which is inscribed in plan into configuration of monolithic foundation by radius of circumference, radius of sphere is identified by given dependencies, as well as maximum angle of elastic semi-contact of foundation sphere with soil foundation, pressure of structural tensile strength of foundation, central critical pressure under center of sphere in maximum elastic base. Bottom of mine pit for concave foundation is arranged with response spherical groove.

EFFECT: improved bearing capacity of foundation, improved elastic contact interaction of foundation with underlying soil foundation.

2 cl, 7 dwg

FIELD: construction.

SUBSTANCE: method for erection of foundation under machines consists in deepening of massive reinforced concrete foundation foot of rectangular or prismatic shape in plan into ground base by ≥¼ of its height, but at least 1 m, its hydraulic insulation against hazardous effect of aggressive ground waters and arrangement of centre of gravity of machine and center of gravity of foundation foot area on the same vertical line, at the same time support surface of foundation is accepted as having area calculated according to given dependence. Support surface of foundation, which is rectangular in plan, is arranged with foot of spherical convex shape, at the same time given dependences are used to identify radius, angle of sector of elastic half-contact of sphere with ground, pressure of structural strength of ground for stretching, critical pressure under center of sphere, besides sphere of foundation is deepened. Support spherical surface is prevented against displacements with slippage and against tilting under action of external dynamic load by increasing edge horizontal support part of foundation rectangular in plan, protruding beyond edges of spherical support central surface, or by anchoring foundation to soil by means of piles. Also arrangement of foundation for machines is proposed.

EFFECT: increased bearing capacity, increased service life.

4 cl, 2 ex, 15 dwg

FIELD: composite material.

SUBSTANCE: invention relates to vibro-impact-isolation composite materials which can be used for manufacturing vibro-impact-isolators. Composite material has a thin multilayer structure, consisting of alternating elastic and viscoplastic layers, reinforced with weave. Thickness of each layer of composite material is from 50 to 200 mcm with the ration of the elastic and viscoplastic layers from 1:1 to 1:1.6 respectively.

EFFECT: obtained composite material has high elastic, strength and damping properties; makes it possible to simplify the structure of vibro-impact-isolators, improve mass-size dimensions and amplitude-frequency characteristics.

1 cl, 3 dwg

FIELD: machine building.

SUBSTANCE: tuning to required damping frequency is performed. Dynamic rigidity or transfer factor dip is experimentally determined at first breadboard specimen. Then on increasing damper slit width, tuning frequency is increased along with increasing damping. Thereafter, tuning frequency is decreased by decreasing damper slit width. Aforesaid reduction is performed by increasing the number of slit pairs. Proposed device comprises interconnected pendulums pivoted to protected object. Each pendulum comprises weight suspended to aforesaid object. One object is located above the points of attachment of its suspension to the object, the others being located below aforesaid points. Tight cylindrical barrel is covered with cap and filled with hydraulic fluid. Movable modular hollow piston is arranged inside aforesaid cylindrical barrel fixed between two cylindrical springs. There is a system of channels inside aforesaid piston. It consists of top and bottom covers and uneven number of round plates. Aforesaid slits are formed by flat round rings arranged between aforesaid covers and plates. Former and latter comprise central bores, while even plates have peripheral orifices arranged nearby inner cylindrical surfaces of round rings.

EFFECT: higher efficiency.

2 cl, 3 dwg

FIELD: construction.

SUBSTANCE: seismic insulator of buildings consists of foundation. Foundation is arranged in the form of reinforced concrete board with sides, where grooves are provided for bearing structures of building, filled with granite sand by height of one metre.

EFFECT: reliable safety of structures, reduced material intensity, improved reliability of structure.

1 dwg

FIELD: construction.

SUBSTANCE: quakeproof suspended wall with suspended glass panels, where the structure of the suspended wall of each floor is fully separated from the structure of the suspended walls of adjacent floors, in the area of windows there are no stands, and glass panels are suspended only onto horizontal beams of the structure. At the same time windows are freely suspended along the whole length of the floor by means of a pair of engaging hooks, at the same time one hook is installed on the upper horizontal beam of the floor window link, included into the structure of the floor arranged above, and the second hook is located on the upper profile of the window frame; the line formed by hooks makes a horizontal sliding line, by means of which the floor displacement caused by an earthquake becomes fully independent from displacement of other floors. At the same time windows are finished with the lower profile of the window frame on the lower horizontal support beam of the floor windows, to which they are rigidly fixed.

EFFECT: windows follow structure movements and form a fixed single sector or floor, interacting, concerning earthquake resistance, with according sector of the floor arranged above.

13 cl, 16 dwg

FIELD: construction.

SUBSTANCE: bracket designed for acoustic insulation of a ceiling support lathing from a frame element, comprises a flat non-detachable main part with an upper end of polygonal shape and a lower end, narrowing in direction of the lower edge, opposite to the upper end, at the same time the lower end has an accessory for lathing arrangement, and in the upper end there is a pair of mounting holes spaced in a transverse direction, an elastic bushing fixed relative to each specified hole and having a hole for a fastening part, to ensure sound insulation of a fastening part stretching via a specified hole into a frame element. Specified mounting holes and the specified accessory for lathing arrangement stretch via the specified main part perpendicularly to its defined plane, so that the bracket is located in parallel to the frame element after assembly; and the specified mounting holes have such dimensions, so that the fastening part inserted into the bushing hole and introduced into the frame element fixes the bracket and the attached main beam to the frame element.

EFFECT: invention makes it possible to increase acoustic insulation of lathing from a frame element and to reduce loss of room height.

5 cl, 3 dwg

FIELD: construction.

SUBSTANCE: dynamic damper of vibrations comprises balances connected to each other by links, hingedly connected to a secured object, each of which has a mass attached to the object with a suspension. At least one mass is located above points of fixation of its suspensions to the object, and others - below points of fixation of their suspensions. At least one mass is connected with a secured object by means of a damping device. The damping device is arranged in the form of at least two flat elastic rings arranged axisymmetrically and in parallel planes, outer and inner ones, which are rigidly connected to each other by means of at least two symmetrical elastic diametrically arranged elements with a through central slot, symmetrically arranged inside the element. Elements connecting outer and inner rings have lines of bending and may be fixed on rings by means of welding, for instance, of contact type, or by fastening threaded elements, or as a glue joint. Cavities formed by outer and inner elastic rings arranged axisymmetrically and in parallel planes are filled with an elastic damping meshy element arranged as reinforced from a meshy frame, filled with an elastomer, for instance, with polyurethane.

EFFECT: invention makes it possible to increase damping ability of a vibration damper.

3 dwg

Up!