51results about How to "Reduce horizontal stiffness" patented technology

A composite vibration isolation system utilizes isolators with negative-stiffness mechanisms to produce low vertical and horizontal natural frequencies to the system by allowing both the horizontal stiffness and horizontal natural frequencies to be adjusted, for example, by turning adjustment screws.

The invention relates to a novel swing self-reset bridge pier with an energy dissipation device and an application thereof, belonging to the technical field of anti-seismic and seismic mitigation andisolation of bridges. The novel swing self-reset bridge pier with the energy dissipation device comprises a cap beam (1), a pier body (2), a bearing cap (3), pile foundations (4), prestressed steel bars (6) and shear anchor bolts (7). The bearing cap (3) is anchored to the ground through the pile foundations (4), and the cap beam (1) is anchored to the bearing cap (3) through the pier body (2), the prestressed steel bars (6) and the shear anchor bolts (7). The novel swing self-reset bridge pier with the energy dissipation device further comprises a tension-compression combined energy dissipation device (5) and the tension-compression combined energy dissipation device (5) is installed and fixed at the junction of the bottom of the pier body (2) and the top surface of the bearing cap (3). The swing self-reset bridge pier has the obvious advantages of no damage after earthquake, small residual deformation and recoverable structure.

The invention relates to a roll shaft type metal shock-insulating supporting seat which is used for base shock insulation in house buildings. The roll shaft type metal shock-insulating supporting seat comprises an upper connection plate, a roll shaft, a roll shaft frame, a middle end plate, an L-shaped pull-resisting connection plate, a pretightening force base plate, a lower connection plate, friction type high-strength bolts and high-strength pull-resisting bolts. The roll shaft type metal shock-insulating supporting seat can be used as a base shock-insulating element to be applied to low-rise building structures, high-rise building structures and super high-rise building structures. When the earthquake action is too large, and the shock-insulating supporting seat is enabled to bear pull force, the L-shaped pull-resisting connection plate and the high-strength pull-resisting bolts play roles in pull resistance. Meanwhile, polyfluotetraethylene plates with extra-low friction coefficient slide between each other, and the roll shaft type metal shock-insulating supporting seat still can play the shock-insulating role when the roll shaft type metal shock-insulating supporting seat is pulled.

The invention relates to a vibration isolator that includes a coil spring. In a horizontal direction, the coil spring is rigidly connected to the base or to the load to be isolated.

The invention discloses an earthquake-isolation energy dissipator for an ultra-high-voltage converter transformer. The earthquake-isolation energy dissipator comprises a plurality of earthquake-isolation supports, steel plates and thin rubbers which are arranged horizontally are arranged on the earthquake-isolation supports from top to bottom at intervals, and central holes are arranged at centers of the earthquake-isolation supports and provided with lead cores inside. The earthquake-isolation energy dissipator is characterized by further being provided with a squared foundation valve plate composed by steel beams, an upper connecting plate and a lower connecting plate, wherein the plurality of earthquake-isolation supports are installed at steel beam nodes of the foundation valve plate, the upper connecting plate and the lower connecting plate are parallel, and the upper and lower surfaces of the earthquake-isolation supports are connected with the centers of the upper connecting plate and the lower connecting plate respectively. According to the earthquake-isolation energy dissipator, the stability is guaranteed, simultaneously, the horizontal stiffness is small, the earthquake-isolation damping effect can be improved, soft limiting and anti-falling functions are provided, the safety of the earthquake-isolation energy dissipator under the action of earthquakes can be guaranteed, when the earthquake-isolation fails, a certain damping effect is also provided, and the safety function is provided in case of failure. The earthquake-isolation energy dissipator is low in construction cost, simple in construction and provided with good social benefits.

The invention relates to a laminated rubber support reinforced by combining fine high-strength steel wire meshes with steel fibers. The laminated rubber support consists of rubber bodies, fine high-strength steel wire meshes, outer-layer protecting rubber and steel fibers, wherein the fine high-strength steel wire meshes are thick meshes woven by high-strength steel wires, and the fine high-strength steel wire meshes are closely distributed in the rubber bodies layer by layer to restrain the side deformation of the rubber bodies, so that the support has rigidity and load-bearing capacity required by normal use; steel fiber materials are distributed in rubber in disorder, so that the mechanical property of the rubber bodies is improved, the connection of the fine high-strength steel wire meshes and composite rubber materials is closer, and the restraining effect is enhanced; favorable deformation capacity of the fine high-strength steel wire meshes and the connection action of the steel fibers ensure that the rubber bodies and the high-strength steel wire meshes can still synergistically work under the condition of extreme deformation, and the problems of adhesive failure and the like cannot occur. Under the action of earthquake, the laminated rubber support allows larger shearing deformation until upper and lower surfaces completely break away from a contact surface to present an overturning state and even generate horizontal scrolling, the earthquake force of an upper structure is prevented from being transmitted to a lower structure, the effect of earthquake insulation is exerted, and the safety of a bridge structure is ensured.

The invention relates to a protection and damping device for an ocean platform, and belongs to the technical field of ocean structures. The device comprises a scissors type displacement magnifying unit, a lamination rubber support, an upper part support platform, a middle part support platform, a lower part support platform, a spacing unit, an ice breaking conical surface body, a groove-shaped connection plate and a bolt. The device is axially symmetric when taking the middle part support platform as a symmetric axis, and is also axially symmetric when taking a pile leg as a symmetric axis. The device can reduce horizontal stiffness of a conical body less, has better resilience and energy consumption damping performance, can reduce compression, friction and vibration effects of ice and wave excitation on the structure effectively, the response of the platform is reduced, and ice-excited vibration problem of the ocean platform is fundamentally solved.

A horizontal-motion vibration isolator utilizes a plurality of bent flexures to support an object to be isolated from horizontal motion. Each bent flexure includes a fixed end coupled to a base and a floating end which is cantilevered and coupled to the object being isolated. The arrangement of bent flexures allows the vertical height of the isolator to be reduced without compromising vibration isolation performance. Compressed springs or spring-like elements can be added to bear some of the weight of the object being isolated thus increasing the payload capacity of the isolator.

The invention discloses a liquid-bag type shock isolator for shock isolation of cultural relics and showcases and belongs to the field of cultural relic shock isolation. The liquid-bag type shock isolator comprises a top steel plate, a rubber bag, a bottom steel plate, an oil filling hole, silicon oil filled into the rubber bag, a groove and a raised plate. The top steel plate and the bottom steel plate are connected through the rubber bag which is filled with the silicon oil. The silicon oil is filled through the oil filling hole. The groove is formed in the top steel plate, and the raised plate is arranged on the bottom steel plate. The size of the rubber bag is equal to those of the groove and the raised plate. Different application requirements can be met by regulating shape and size of the top steel plate and the bottom steel plate, the thickness of the rubber bag and the viscosity of the silicon oil. The liquid-bag shock isolator is simple in structure, small in thickness and easy to be standardized and has both horizontal shock isolation capacity and vertical shock isolation capacity.

Disclosed herein is an engine mounting structure for reducing vibration. In particular, an engine having a mass is mounted to a damper pulley or a drive plate thereof to form an outer balancer. A roll mount is positioned on a virtual yaw axis after the virtual yaw axis is set in the engine, and an engine mount is mounted to one end of a virtual torque roll axis after the virtual torque roll axis is set in the engine. Furthermore, a transmission mount is mounted to the other end of the virtual torque roll axis. Therefore, the mounts are mounted to the engine to reduce vibration at the time of idle vibration, thereby making it possible to improve NHV performance of a vehicle and increase salability and driving convenience of a driver.

The invention provides a metal composite energy dissipater with double-order yield points for a shock insulation layer. The metal composite energy dissipater comprises a first yield energy dissipation section and a second yield energy dissipation section. The first yield energy dissipation section is formed by orthogonally arranging four groups of spiral steel bar energy dissipation units and is used for absorbing earthquake energy input in two directions; and the second yield energy dissipation section is made of a variable-cross-section yield energy dissipation lead pipe, and end plates are arranged at the upper end and the lower end of the second yield energy dissipation section to provide end restraint. The metal composite energy dissipater has the deformation capacity matched with large-earthquake displacement of the shock insulation layer, and under the action of a rare earthquake and under the condition that the shock insulation layer has larger displacement, the normal energy dissipation and shock absorption working state can still be kept; and meanwhile, the metal composite energy dissipater has the characteristic of double-order yield energy dissipation, the output of the metal energy dissipater can be increased in stages along with the increase of the earthquake action, a hysteretic energy dissipation curve of a damper is full under different earthquake magnitudes, and it is guaranteed that the metal composite energy dissipater has the excellent energy dissipation and shock absorption effect under the different earthquake magnitudes.

A one-way slide type vibration and noise reduction rubber support of rail transit bridge comprises an upper support plate (2) and a lower support plate (8), wherein the lower wedge fixing block I (5) and the lower wedge fixing block III (10) on the lower support plate (8) are opposite to each other, the lower wedge fixing block II (7) and the lower wedge fixing block IV (11) on the lower support plate (8) are opposite to each other, the bottom of the upper support plate (2) is correspondingly provided with four upper wedge fixing blocks (4), a vulcanized rubber plate I (6) is disposed between the lower wedge fixing block I (5) and the corresponding upper wedge fixing block (4), a vulcanized rubber plate II (12) is disposed between the lower wedge fixing block II (7) and the corresponding upper wedge fixing block (4), a vulcanized rubber plate III (13) is disposed between the lower wedge fixing block III (10) and the corresponding upper wedge fixing block (4), and a vulcanized rubber plate IV (14) is disposed between the lower wedge fixing block IV (11) and the corresponding upper wedge fixing block (4). The one-way slide type vibration and noise reduction rubber support has the advantages that sufficient vertical rigidity and vertical vibration reduction damping are guaranteed, and weak vibration of rails during operation is weakened.

The invention discloses a device capable of randomly adjusting horizontal rigidity and adapting to wind resistance and shock insulation. The device comprises a shock insulation layer which is arrangedbetween an upper structure and a lower structure and is composed of a plurality of shock insulation supporting bases and a plurality of horizontal rigidity mutation control devices, wherein the shockinsulation supporting bases are arranged below columns and shear walls of the upper structure, and provide vertical bearing force and horizontal rigidity for the columns and the shear walls of the upper structure, the horizontal rigidity mutation devices are arranged below the upper shear walls, under the action of wind loads, horizontal rigidity and horizontal bearing force provided by the horizontal rigidity mutation devices can effectively convey the wind loads to the lower structure or a foundation, and horizontal rigidity mutation of the horizontal rigidity mutation control devices is zero under the effect of an earthquake, so that the shock insulation layer plays a shock insulation effect. According to the device, a rigidity mutation control mechanism is formed by utilizing a maintenance structure of the shock insulation layer, or a mechanical principle, a hydraulic technology and an automatic control technology are used for adjusting and controlling the horizontal rigidity of the structure, the rigidity mutation is realized, and the purpose of effectively insulating the earthquake and resisting the wind loads is achieved.

The invention provides a three-dimensional shock insulation layer which comprises a vertical shock insulation layer and a horizontal shock insulation layer, a top plate is arranged at the top of the vertical shock insulation layer, and a bottom plate is arranged at the bottom of the horizontal shock insulation layer; the vertical shock insulation layer and the horizontal shock insulation layer are arranged in a stacked mode in the vertical direction, and a middle partition plate is arranged between the vertical shock insulation layer and the horizontal shock insulation layer. The three-dimensional seismic isolation device has the advantages of being low in vertical and horizontal rigidity, high in damping, high in buckling-restrained stability and high in swing resistance, a three-dimensional seismic isolation function can be achieved, an earthquake or vibration effect is effectively isolated, and seismic isolation protection is formed for buildings, structural facilities or equipment and the like.

The invention provides a vibration and shock double-control structure for a wood structure ancient building along a subway and a design method. The control structure comprises a vibration isolation layer between the bottom of the wood structure ancient building and a platform foundation and dampers arranged above square columns and connected with columns, wherein the vibration isolation layer comprises an underpinning chassis (5) located at the bottom of the building, a vibration isolation support (4) and a vibration isolation support chassis (6) located on the platform foundation and used for supporting the vibration isolation support. Meanwhile, based on numerical analysis, the complete and feasible design method is provided, and the vibration isolation support and the dampers are optimally configured. According to the double-control structure and the design method, the vibration influence of the subway can be effectively relieved, and the requirement for anti-seismic protection of the wood structure ancient building can be met.

The invention discloses a horizontal exciting device for testing a cross coupling coefficient of an inertia sensor. The device comprises a suspension structure, an exciting unit and an adjustment mechanism. The suspension structure is used for fixed connection of the inertial sensor, uses a multi-reed suspension manner, and has the advantages of low horizontal rigidity and high cross inhibition ratio; the exiting unit generates a force needed by motion by interaction between coils and permanent magnets, and angular motion in the vertical direction and horizontal movement of a non-sensitive shaft can be inhibited by controlling the magnitude of current in the driving coils and feedback control of the non-driving coils; and the adjustment mechanism is used to adjust the effective work lengths of the reeds, and ensure that the effective lengths of the reeds are consistent during work of the whole device. Via design of the suspension structure, exciting unit and adjustment mechanism, the problem that the exciting device cannot generate purely horizontal vibration due to high motion coupling in the different freedom degrees in the prior art can be solved.