36 results about "Lateral stiffness" patented technology

The application provides a spring bidirectional composite metal rubber damper and a working method thereof. The spring bidirectional composite metal rubber damper comprises a vertically arranged outer sleeve, one end of the outer sleeve is closed, the other end of the outer sleeve is internally provided with an inner sleeve, one end of the inner sleeve is closed, the other end of the inner sleeve is movably connected with a core shaft, an annular clamping shoulder is arranged in the middle of the inner sleeve, the annular clamping shoulder divides the inner sleeve into an upper damping cavity and a lower damping cavity, the shaft section of the core shaft located in the upper damping cavity is externally provided with an upper damping pad, the shaft section of the core shaft located in the lower damping cavity is externally provided with a lower damping pad, a lower connecting mechanism is arranged on the closed end of the outer sleeve, the end of the core shaft extends out of the open end of the inner sleeve, and an upper connecting structure is arranged on the extending end. The application is convenient for damping of aerospace, aviation, nuclear industry and military instruments, can solve the poor rigidity adjustability of the current single metal rubber damper, that is, it is difficult to realize the coordination between low rigidity and high durability, meanwhile, the structure has high lateral rigidity and compact structure.

The application discloses a spatial spiral compliance mechanism with a variable stiffness characteristic, comprising a variable stiffness component, a bending component and a fixed base, wherein the variable stiffness component comprises a rigid element, two first leaf-shaped flexible hinges and a variable stiffness module, the two first leaf-shaped flexible hinges are oppositely arranged, and opposite ends of the two first leaf-shaped flexible hinges are respectively connected with the rigid element and the fixed base; the rigid element, the two first leaf-shaped flexible hinges and the fixed base enclose a containing space, the containing space is provided with the variable stiffness module, the fixed base is provided with a containing groove, the bending component is connected with the inner wall of the containing groove, and opposite ends of the variable stiffness module are respectively connected with the rigid element and the bending component; the rotation angle of the variable stiffness module is controlled by input displacement of a driver, the continuous and accurate adjustment of the lateral stiffness of the rigid element can be realized, the variable stiffness module can be quickly adjusted to a suitable stiffness value according to different working requirements, and the adaptability of the spatial spiral compliance device is greatly improved.

The invention discloses a design method of an integral swing self-resetting structure for mounting a tension-compression energy-dissipation support, and relates to the technical field of civil engineering earthquake resistance, and the integral swing self-resetting structure comprises a tensile limiting device and a compression limiting device; the method specifically comprises the steps that a structural mechanical model is established, and the lateral stiffness of a traditional fixed foundation is calculated; setting a rigid body displacement ratio to determine the vertical and horizontal rigidity and strength of the support; carrying out finite element push-and-cover analysis to verify a rigid body displacement ratio; setting an additional damping ratio; carrying out seismic response spectrum analysis on the vertical seismic isolation structure; calculating the vertical natural vibration period of the structure and adjusting the rigidity according to the response spectrum; carrying out elastic-plastic time-history analysis to detect an interlayer displacement angle, acceleration and structural damage; checking the consistency of the additional damping ratio and the actual energy consumption; and finally, anti-overturning checking calculation under extremely rare earthquake is carried out to ensure that the support and the limiting device are in an elastic state. The energy dissipation capacity and anti-seismic safety of the structure can be effectively improved, and the structure is suitable for various building structures needing vertical and horizontal seismic isolation.

The utility model belongs to the technical field of flexible structure design, and particularly relates to a height-variable supporting column structure which comprises a shell, a series butterfly-shaped flexible device and a driving device. The shell is in a regular hexagon shape, the interior of the shell is of a hollow structure, the top of the shell is open, the series butterfly-shaped flexible device and the driving device are both arranged in the shell, the series butterfly-shaped flexible device comprises multiple sets of flexible plates stacked up and down, round holes are formed in the centers of the flexible plates, and the flexible plates and the shell are coaxially arranged; the driving device and the shell are coaxially arranged; when the height of the supporting column needs to be adjusted, the driving device drives the multiple sections of column bodies to slide up and down, meanwhile, the flexible plate stretches or contracts under the elastic force of the flexible plate, and therefore height adjustment of the supporting column is achieved, the structure is simple, and control is stable. Meanwhile, in the process of changing the height, the height-variable supporting column has enough lateral rigidity to resist lateral load and torque load, and the process is simple and easy to implement.

The invention provides a wood structure truss type reinforcing system with composite energy consumption and self-resetting, which belongs to the technical field of ancient building wood structure reinforcement and comprises a wood upper cross beam, a wood lower cross beam, a viscous damping device, a spring device and a friction energy consumption device. The additional wooden upper cross beam is rigidly connected with the common square columns on the two sides, so that the transverse rigidity and integrity are remarkably enhanced, and weak links at the joints of the bracket set and the common square columns are eliminated; through cooperative work of a plurality of adjustable viscous damping devices, spring devices and friction energy dissipation devices, the energy dissipation capacity is improved in a grading mode, and meanwhile the swinging and self-resetting functions of the wooden column are reserved.

The application discloses a deformation controlled corner brace with external metal energy absorber, which comprises an inner metal rod, an outer metal tube, a standby pull rod system, a connecting plate, a compression elastic pad and an external metal energy absorber. The inner metal rod is inserted into the inner part of the outer metal tube and is connected by the standby pull rod system in the inner part, and is connected by the external metal energy absorber on the outer surface. The inner part of the outer metal tube is provided with the compression elastic pad at the bottom end. The standby pull rod system limits the maximum tensile deformation of the inner metal rod relative to the outer metal tube, and the compression elastic pad reduces the impact of the inner metal rod on the outer metal tube. The application has the beneficial effects that when the structure bears the design expected earthquake effect, the application can dissipate the earthquake energy by the plastic deformation of the external metal energy absorber, when the structure bears the great earthquake effect and the structure deformation is large, the corner brace can be degraded into a force bearing support, the maximum deformation of the structure is limited, the lateral stiffness of the structure is improved, and the anti-collapse performance is improved.

The invention relates to the technical field of tire finite element simulation design, in particular to a method, a system, a medium and a software product for calculating contribution of a tire part to radial rigidity. The method comprises the steps that a two-dimensional tire finite element model is established, inflation pressure is applied, a three-dimensional model is generated, a load is applied, and the radial rigidity of a complete tire is calculated; the Young modulus of the target part is reduced to 0.01%-5% of a design value, simulation is repeated, and rigidity after modification is calculated; and calculating a rigid contribution value and a contribution rate of the component through a difference value between the two values. The system comprises a finite element modeling module, a simulation module, an attribute adjustment module and a rigidity analysis module. On the premise of ensuring the continuity of a simulation structure and the consistency of working conditions, the method can accurately peel off the contribution of the component, is suitable for different tire structures, and has the advantages of high precision, high universality, low cost and the like.

The utility model discloses a wheel which comprises a spoke and a rim, the outer edge of the spoke is fixedly connected with the rim of the rim, the wheel further comprises a lateral reinforcing piece arranged on the inner side of the rim, a center connecting hole is formed in the center of the spoke, and the lateral reinforcing piece is arranged on the inner side of the rim. The first end of the lateral reinforcing piece is fixedly connected with the spoke to form a first connecting part, the first connecting part is located between the center connecting hole and the outer edge of the spoke, the second end of the lateral reinforcing piece is fixedly connected with the inner wall of the rim to form a second connecting part, and the second connecting part is located between the center connecting hole and the inner wall of the rim in the axis direction of the rim. And a space is formed between the second connecting part and the connecting part of the spoke and the rim. The wheel provided by the utility model has better lateral rigidity.

The utility model relates to the technical field of brake pedals, and discloses a shaft sleeve structure for increasing the lateral rigidity of a brake pedal, which comprises a pedal arm and a bracket for mounting the pedal arm, and further comprises a main shaft body for connecting the pedal arm and the bracket, and two shaft sleeves sleeved on the side surfaces of the main shaft body, the shaft sleeve comprises main shaft sleeves arranged on the side faces of the main shaft body in a sleeving mode and an extrusion ring located between the pedal arm and the support, first assembly grooves matched with the two main shaft sleeves are formed in the opposite side faces of one end of the pedal arm in a penetrating mode, and second assembly grooves matched with the main shaft body are formed in the opposite side faces of the support in a penetrating mode. According to the utility model, the widened and enlarged extrusion ring is arranged, and the extrusion ring is trumpet-shaped, so that interference fit assembly is realized for the distance between the bracket and the pedal arm during assembly, the requirement on a required size chain is reduced, a certain force lag is provided, the rigidity of the two sides of the pedal arm is improved, and the driving comfort is improved.

This invention provides a vibration isolator suitable for a satellite momentum wheel vibration isolation support, comprising a first retaining block (2a), a connecting block (3), and a second retaining block (2b) arranged sequentially; it also includes two symmetrically arranged first elastic components (1a) connected between the first retaining block (2a) and the connecting block (3), and two symmetrically arranged second elastic components (1b) connected between the connecting block (3) and the second retaining block (2b); damping energy dissipation materials (5) are respectively provided between the symmetrically arranged first elastic components (1a) and between the symmetrically arranged second elastic components (1b). This invention has low lateral stiffness, high axial stiffness, and large damping characteristics. By reasonably arranging and installing it between the support and the momentum wheel, it can effectively meet the vibration isolation requirements of the momentum wheel; this invention has advantages such as simple and compact structure, convenient processing and assembly, high design freedom, stable and reliable performance, light weight, and low cost.

The application discloses a primary suspension system and a railway vehicle, which comprises a framework, an axle box body arranged on the inner side of a side beam of the framework, a rubber node assembly connected between the top of the axle box body and the framework, used for providing longitudinal and transverse positioning stiffness and releasing vertical stiffness, two steel spring assemblies connected between the top of the axle box body and the framework, and the two steel spring assemblies are respectively arranged on the two sides of the rubber node assembly along the longitudinal direction, used for providing vertical stiffness, and a positioning pull rod connected between the bottom of the axle box body and the framework, used for providing longitudinal stiffness and releasing vertical stiffness and transverse stiffness. The vertical stiffness, the transverse stiffness and the longitudinal stiffness are decoupled, the stiffness in the vertical direction, the longitudinal direction and the transverse direction is respectively realized independently, the primary suspension system has sufficient wheelset axle box positioning stiffness and small vertical stiffness, the critical speed and the ride comfort of the vehicle are ensured, and the high-speed stability and the smoothness requirement of the vehicle are met.

The invention relates to a splicing structure of adjacent new and old main beam diaphragm plates for widening a bridge and a splicing method thereof, in particular to the technical field of bridge construction. The steel-UHPC combined diaphragm plate comprises the early-formed steel-UHPC combined diaphragm plate and the middle later-stage UHPC poured into the early-formed steel-UHPC combined diaphragm plate, the high tensile capacity of the steel plates and the steel bars and the ultrahigh strength of the UHPC are fully played, and adjacent new and old main beams of an existing bridge and an extended new bridge are temporarily spliced into a whole through the diaphragm plate; the requirements for transverse tension and vertical shearing of the spliced transverse partition plate are met, meanwhile, weak vertical rigidity and transverse rigidity are temporarily formed, and large transverse bridge deformation and vertical warping generated by concrete shrinkage creep difference after splicing are coordinated; the structure is simple, the design is reasonable, construction is convenient, the splicing time is shortened, the method can be widely applied to splicing of adjacent new and old main beam diaphragm plates of an existing bridge and an extended new bridge in a broadening and extension project, and the construction efficiency is improved.

This application proposes a method for the online identification of wheel lateral stiffness. The method comprises the following steps: Step S1: creation of a lateral kinematic model of the vehicle with respect to the parameters to be identified, taking into account the lateral stiffness of the front and rear wheels of the vehicle; Step S2: discretization of the lateral kinematic model of the vehicle to obtain a discrete model with respect to the parameters to be identified; and Step S3: fitting the output of the discrete model using a water circulation algorithm to determine the parameters to be identified online. This application also proposes a device for the online identification of wheel lateral stiffness and a computer program product. This application uses a heuristic algorithm to identify the wheel lateral stiffness online.This takes into account the temporal variability of the wheel lateral stiffness, which significantly improves vehicle stability control.

The utility model discloses a screw rod cast-in-place pile body reinforcing structure assembly, and relates to the technical field of screw rod cast-in-place piles, the screw rod cast-in-place pile body reinforcing structure assembly comprises two reinforcing frames, a connecting frame is arranged between the two reinforcing frames, each reinforcing frame comprises a plurality of stiffening hoops, the stiffening hoops are vertically arranged, the stiffening hoops are fixedly connected with a plurality of main reinforcements, and the main reinforcements are fixedly connected with the connecting frame. The multiple main reinforcements are arranged along the inner circle edge of the stiffening hoop, a stable structure is arranged on the multiple main reinforcements, and the stable structure comprises spiral stirrups and triangular reinforcements; the spiral stirrups are tightly wound on the outer sides of the main reinforcements to form a continuous spiral structure, and when the spiral stirrups are subjected to shear force, the spiral stirrups can effectively resist shear damage, so that the overall shear resistance of the reinforcement frame is improved; the triangular ribs are arranged in a triangular shape and connected between the main ribs of the reinforcing frame to form a stable supporting structure, and the transverse rigidity of the reinforcing frame is improved due to the triangular ribs, so that the reinforcing frame can better bear lateral pressure or bending moment.

The utility model discloses a weak lateral stiffness vehicle-bridge coupling vibration damping device which comprises a plurality of vibration damping mechanisms arranged between two track beams, a plurality of steel cross beams are arranged between every two adjacent vibration damping mechanisms, each vibration damping mechanism comprises a support, a hydraulic damper, a spring and a positioning pipe, the positioning pipes are fixed on the track beams, and the hydraulic dampers are arranged on the support. The support is connected with the positioning pipe in a sliding mode, the two ends of the hydraulic damper located in the positioning pipe are connected with the support and the track beam respectively, and the hydraulic damper is sleeved with a spring. Compared with the prior art, on the basis of the design of the emergency channel, the damping mechanism serves as a part of the emergency channel, the damping effect is achieved while the requirement of the emergency channel is met, meanwhile, the damping mechanism plays a strong connection role for the track beams on the two sides, the safety of the structure is guaranteed, and the running safety and comfort of a vehicle are improved. Compared with a traditional emergency channel design, laying of steel longitudinal beams is omitted, and the material consumption is reduced.

The invention belongs to the technical field of anti-seismic reinforcement of building structures, and discloses a method for calculating lateral stiffness of an externally-attached energy dissipation frame reinforcement system based on a virtual work principle. The problem that in the prior art, a quick and reliable theoretical calculation method for quantizing contribution of the bending type damper to the lateral stiffness of the attached frame column is lacked is effectively solved. The method aims at a frame reinforcing system composed of an existing frame, an externally-attached frame and a bent metal damper connected to a beam-column joint of the externally-attached frame. The method comprises the following steps that (1) a damper rotating rigidity model is established and solved; (2) establishing an equivalent linear stiffness model of the reinforced combination column and solving the equivalent linear stiffness model; and (3) establishing and solving an overall frame lateral stiffness resistance model. The closed analysis method is clear in physical concept and simple in calculation, parameter design and structural scheme optimization of the damper can be efficiently guided, and the design efficiency is remarkably improved.

This invention discloses a self-balancing lapped column transfer structure with a diagonal web truss, belonging to the field of structural engineering technology. It solves the problems of abrupt changes in lateral stiffness caused by existing transfer structures and the narrow applicability of existing lapped column transfer structures. The self-balancing lapped column transfer structure of this invention includes an lapped upper column, an lapped lower column, an lapped block, connected vertical members, an upper chord, a lower chord, and diagonal web members. The upper chord, lower chord, and diagonal web members constitute a self-balancing truss. The upper chord, lower chord, and diagonal web members are all connected to the lapped block and surrounding vertical members. The introduction of the self-balancing truss can self-balance the axial forces of the floor slabs above and below the lapped block, thereby greatly reducing the shear force of the connected vertical members. It also reduces abrupt changes in lateral stiffness, improves the seismic performance of the transfer structure, and is particularly suitable for high-rise transfers. This invention can be used for various high-rise and super high-rise transfer structures.

The invention discloses a wheel lateral rigidity test optimization method and device, and belongs to the field of detection equipment. The device provided by the invention is composed of an axis positioning mechanism and a locking scale mechanism which are connected through a central shaft. The axis positioning mechanism utilizes a slide rail, a slide block and a positioning claw to cooperate with a slide rail mounting disc and a bottom plate to realize axis positioning of a to-be-measured wheel center hole, and realizes rapid and accurate positioning of the center of the mounting hole of the to-be-measured wheel. The locking scale mechanism ensures that excitation points are uniformly distributed through an angle dial and a length scale, and the connecting line of the two pairs of excitation points passes through the circle center of the center hole of the wheel to be measured. The device provided by the invention can be operated by a single hand, is simple in structure and convenient to operate, effectively solves the problem of measurement deviation caused by traditional visual point selection, and remarkably improves the accuracy and working efficiency of wheel lateral rigidity testing.

The utility model discloses a truss structure for improving lateral stiffness of a super high-rise building. The truss structure comprises a core tube, an outer frame, an outrigger truss and an annular belt truss, the outrigger truss comprises a plurality of first diagonal web members used for connecting the core tube and the outer frame and a plurality of X-shaped supporting bodies arranged on the end faces of the two sides of the core tube. Each X-shaped supporting body comprises a second diagonal web member, the four second diagonal web members are connected to form the X-shaped supporting body, and the ends of the second diagonal web members of the adjacent X-shaped supporting bodies are welded to the ends of the two sides of the core tube. A plurality of transverse truss girders and a plurality of longitudinal truss girders are arranged between the two sides of the core tube provided with the X-shaped supporting bodies and the outer frame, and the transverse truss girders and the longitudinal truss girders are connected in a staggered mode; the side close to the core tube is defined as the inner side, the inner end of the first diagonal web member is welded to the end of one side of the core tube, and the outer end is welded to the outer frame; the annular belt truss is arranged on the outer frame. The anti-lateral rigidity of a building can be effectively improved, and the practicability is high.

The utility model discloses a laminated wood beam column connection reinforcing structure which comprises a column body and a beam body, the top of the column body is inserted into the bottom of the beam body, reinforcing blocks are arranged on the outer side wall of the column body in an annular array mode, inserting blocks inclining downwards are arranged at the bottoms of the reinforcing blocks, adaptive inserting grooves are formed in the outer side wall of the beam body, and the tops of the reinforcing blocks extend into through grooves of the beam body. The side wall of the through groove is tightly attached. A stabilizing structure is arranged at the top of the beam body and comprises limiting blocks and a connecting plate, the limiting blocks are fixed in the through grooves through steel nails, and the connecting plate connects the limiting blocks into a whole and is embedded into the mounting groove in the top of the beam body; according to the structure, through the cooperation of the inserting blocks and the inserting grooves, the cooperation of the through grooves and the limiting blocks and the cooperation of the supporting plates and the inserting grooves, the connection stability and lateral stiffness are remarkably improved, and the structure is particularly suitable for beam-column connection reinforcement in a laminated wood structure building and has the advantages of being simple in structure, convenient to construct and high in bearing capacity.

The invention discloses a suspension structure system with small lateral stiffness of a steel structure main body and a construction method thereof.The suspension structure system comprises a main body structure and a suspension area, the suspension area comprises an overhanging truss, a lower suspension layer and suspension columns which are all prefabricated structure on-site assembly, and floor beams at the two ends of the lower suspension layer are rigidly connected with the main body structure in the overhanging direction; the rest floor beams are hinged to the main body structure, the lower chord members of the cantilever trusses are connected with the floor beams of the lower hanging layers through hanging columns, and the floor beams of the adjacent lower hanging layers are connected through hanging columns; the beam perpendicular to the floor beam is a floor secondary beam, and the floor secondary beam of the lower hanging layer is a continuous beam rigidly connected with the floor beam; in the out-of-plane longitudinal direction perpendicular to the cantilever truss, floor slab in-plane horizontal supporting rods are arranged on all spans below all layers of floor slabs in the suspension area. According to the method, the safety of structural members can be met, the rigidity participating in overall calculation can be as small as possible, meanwhile, resources are saved, and low carbon and high efficiency are achieved.

The invention discloses a test method for acquiring low-temperature longitudinal and transverse stiffness of a tire, relates to the technical field of tire testing, solves the problem that longitudinal or transverse accurate loading cannot be performed on the tire in a low-temperature environment in the prior art, and has the beneficial effect that the longitudinal stiffness and the transverse stiffness of the tire in the low-temperature use environment can be acquired. According to the specific scheme, the test method for obtaining the low-temperature longitudinal and transverse stiffness of the tire comprises a test box, a cavity is formed in the test box to contain the tire, and a cooling medium inlet hole is formed in the side portion of the test box to introduce a cooling medium into the test box; the test bench comprises a driving mechanism, the driving mechanism penetrates through the test box to be in contact with the tire in the test box, and the driving mechanism drives the tire to move longitudinally or transversely along the tire; the radial loading mechanism comprises a loading shaft, the loading shaft is connected with a tire in the test box, and the radial loading mechanism applies radial force to the tire through the loading shaft; the detection mechanism comprises a first force sensor.

A multi-dimensional shock insulation support with a negative Poisson's ratio structure form, comprising a support upper connecting plate (1) and a support lower connecting plate (2), characterized in that: the support upper connecting plate (1) and the support lower connecting plate (2) are provided with a support body with a negative Poisson's ratio effect, the support body is composed of multiple corrugated steel plates (3), vertical partition plates (4) distributed longitudinally and transversely, and organic elastic material, vertical partition plates (4) are arranged between two adjacent corrugated steel plates (3) longitudinally and transversely, the corrugated steel plate (3) and the vertical partition plate (4) constitute a plurality of deformation cavities (5), and the deformation cavities (5) are filled with elastic filling blocks (6) or filled with elastic material (6), the application is convenient to install, has a long service life, the lateral stiffness and the lateral damping ratio are greatly improved, the tensile property is good, the horizontal limiting force is enhanced, and a good energy dissipation and shock absorption effect can be achieved.

A steel-timber composite shear wall with layered steel plates and timber cover plates is provided in the present disclosure, including a rubber layer, with a first thin low yield point (LYP) steel plate and a second thin structural steel plate respectively arranged on both sides of the rubber layer. A first timber cover plate and a second timber cover plate are respectively arranged outside the first thin LYP steel plate and the second thin structural steel plate. The steel plate and the timber cover plate are fixed through self-tapping screws. The grain of the first and second timber cover plates are arranged obliquely, and the oblique angles are determined based on height and width of the timber cover plate. Compared with the prior art, the shear wall has the advantages of environment friendliness, good buckling restraint performance, high lateral stiffness, multi-stage load resisting mechanism, and high prefabrication rate.

The present application belongs to the field of rail transit equipment technology, and provides a multi-stage damping spring floating slab track bed and a regulating method, comprising a floating slab, a lower-mounted vibration isolator, a side-mounted vibration isolator, a first stiffness adjusting device, a second stiffness adjusting device, a base, a drainage ditch and a shear hinge device. The structure of the present application has lower dynamic stiffness than ordinary spring floating slab, but the static stiffness is not reduced, that is, the damping effect of the rail system is improved while the carrying capacity is ensured. It also has certain lateral stiffness, so that the stress condition of the rail structure in the curve section is significantly improved. It can also achieve ultra-low frequency damping within 10 Hz, and suppress the "low frequency vibration amplification" phenomenon of traditional spring floating slab.

The application discloses an integrated squirrel-cage elastic support and a rotor axial force measuring method, and the integrated squirrel-cage elastic support comprises a connecting cylinder and a bearing outer ring which are integrally connected, and a plurality of elastic strips are connected between the connecting cylinder and the bearing outer ring; a base is arranged below the connecting cylinder; the base comprises a plurality of mounting blocks which are uniformly distributed in a circumferential direction and a plurality of arc-shaped beams which are arranged in a circumferential direction and are uniformly segmented; the arc-shaped beams are connected with the bottom wall of the connecting cylinder, there is a gap space between the top end of the mounting block and the bottom end of the connecting cylinder, and the mounting block is connected with the outer side wall of the connecting cylinder; and a force measuring unit is arranged on the bottom surface of the arc-shaped beam. Since the gap space exists between the top end of the mounting block and the bottom end of the connecting cylinder and the mounting block is connected with the outer side wall of the connecting cylinder, the force measuring unit of the arc-shaped beam does not affect the lateral stiffness and structural strength of the application, the dynamics and vibration characteristics of the traditional squirrel-cage elastic support are not changed, and the rotor axial force measuring can be satisfied.

The present application belongs to the field of data processing, and provides a method, system and device for optimizing stability parameters of a herringbone ladder outrigger, wherein the lateral outward movement is used as redundancy, the horizontal loading force is divided by the lateral stiffness, and the effective half-width without outward extension is obtained by subtracting the lateral outward movement from the half-width without outrigger; the minimum moment extension is the non-negative part of the difference between the required half-width and the effective half-width without outward extension, and the minimum anti-slide extension is the tangent function of the directional margin angle multiplied by the anchor point height; whether the parameters of the herringbone ladder need to be optimized is determined according to whether the maximum value in the minimum moment extension and the minimum anti-slide extension falls within the extension constraint interval. Thus, design, manufacturing and testing can be unified, trial and error can be reduced, stability can be improved, and the first-time pass rate of type testing can be improved.

The invention provides a mechanical test device and method for a lateral constant-rigidity pillar filling body of a metal mine, and relates to the technical field of mechanical simulation tests of the metal mine. According to the invention, the accurate mechanical simulation of the pillar-filling body combination under the constant lateral stiffness boundary condition is realized, and the authenticity and reliability of the test are greatly improved. An inner bearing plate and an outer bearing plate which are connected through an elastic piece (such as a spring) are arranged on the two sides of an ore pillar-filling body test piece, and a boundary condition capable of providing constant lateral rigidity is constructed. By means of the design, the mechanical behavior that the restraining effect of surrounding rock (jambs) on a filling body can be correspondingly adjusted along with deformation of the jambs in an actual mine can be dynamically simulated, the defect that a traditional rigid boundary loading mode cannot reflect dynamic changes of lateral pressure is thoroughly overcome, and the test result is closer to engineering practice. According to the invention, the integrality and integration test of the pillar-filling body-surrounding rock system is realized, and the research perspective is more scientific and systematic.

The invention provides a rotary friction joint and energy dissipation inclined strut system of an assembly type laminated wood frame. The rotary friction joint and energy dissipation inclined strut system comprises a frame body composed of laminated wood columns and laminated wood beams. The steel connecting seat at least comprises a foundation steel connecting seat arranged at the bottom of the column and a middle-layer box-shaped steel connecting seat arranged at the top of the column and used for being connected with an upper structure; and the rotary friction energy dissipation steel joints are arranged between the end parts of the laminated wood beams and the middle-layer box-shaped steel connecting seats. The problems that a traditional laminated wood frame joint is low in rotational rigidity and prone to brittle splitting of wood are effectively solved, the lateral stiffness, the energy dissipation capacity and the ductility of the structure are remarkably improved, meanwhile, the aseismic design concept of highly prefabricated assembly and'strong joints and weak components' is achieved, and the laminated wood frame joint has the advantages of being environmentally friendly and easy to repair after an earthquake.

The application discloses a kind of wheel lateral stiffness test optimization method and its device, belong to detection equipment field.The device provided by the application is composed of axis positioning mechanism and locking scale mechanism, and the two are connected by center shaft.Axial positioning mechanism utilizes slide rail, slider and positioning claw to cooperate with slide rail mounting disc and bottom plate to realize the axial positioning of the center hole of the wheel to be measured, and simultaneously realizes the quick and accurate positioning of the center of the mounting hole of the wheel to be measured.Locking scale mechanism ensures that the distribution of excitation points is uniform, and the line connecting the two excitation points of the two pairs passes through the center of the center hole of the wheel to be measured.The device provided by the application can be operated with one hand, has simple structure and is convenient to operate, effectively solves the measurement deviation problem caused by traditional visual selection, and significantly improves the accuracy and work efficiency of wheel lateral stiffness test.