94 results about "Lateral stiffness" patented technology

The invention relates to the technical field of molds, and particularly discloses a multi-point forming mold which comprises an upper mold and a lower mold, the upper mold and the lower mold each comprise a mold base, a plurality of pressing head assemblies and a plurality of guiding pieces, the multiple pressing head assemblies are fixedly connected into the mold bases in a rectangular array mode, each pressing head assembly comprises a motor, a screw, a thread sleeve and a forming pressing head, and the motor is used for driving the screw to rotate; the screw is in threaded connection with the threaded sleeves, the forming pressing head is arranged at the end, away from the motor, of the screw and extends out of the threaded sleeves, the multiple guiding pieces are fixedly connected into the mold base in a rectangular array mode, the threaded sleeves are connected to the two sides, in the first direction and the two sides, in the second direction, of the guiding pieces correspondingly, and the threaded sleeves are slidably connected with the guiding pieces and can slide in the height direction of the guiding pieces. The first direction is perpendicular to the second direction. The multiple pressing head assemblies can be connected into a whole through the multiple guiding pieces, so that the transverse rigidity of the multi-point forming die is improved, meanwhile, the guiding pieces guide ascending and descending of the threaded sleeve, and the accuracy of the ascending and descending action of the threaded sleeve is guaranteed.

The invention provides a ship crane capable of stabilizing and a crane jib assembly, and relates to the technical field of ship cranes, the ship crane comprises a tail end rotating arm, a damping stabilizer is arranged below the tail end of the tail end rotating arm, and an anti-shaking lifting hook is arranged under the damping stabilizer; a lifting hook driving assembly for driving the anti-shaking lifting hook to ascend and descend is arranged in the tail end rotating arm, and stabilizer driving assemblies for driving the damping stabilizer to ascend and descend are arranged at the positions, close to the front end, of the two side walls of the tail end rotating arm. Different stages of cargo hoisting are dealt with in a sectional hoisting mode, in the initial stage of cargo hoisting, tearing or deformation of a hoisting point structure caused by transverse impact is avoided in a flexible connection mode by matching single-rope hoisting with high motion inertia of marine cargos, and after the cargos reach the target height, the hoisting point structure is lifted to the target height. The damping stabilizer drives the goods to be further lifted, the anti-shaking lifting hook adopts the double-rope design, the transverse rigidity is remarkably improved, and the high-precision positioning requirement for goods alignment is met.

A damping partition wall design method having variable friction energy dissipation, comprising the following steps: establishing an empty frame model which does not consider the lateral stiffness resistance of a partition wall, and calculating the inter-story shear force and inter-story displacement of a structure under the action of an earthquake; calculating the elastic strain energy of the structure, and determining an expected additional damping ratio provided by the damping partition wall for the structure; determining a friction damping force-sliding displacement curve of a single group of damping partition walls, and establishing a relational expression of total friction hysteresis energy dissipation and the friction damping force and target sliding displacement of the single group of damping partition walls; comparing a calculated additional damping ratio and the expected additional damping ratio to obtain the relationship thereof, and determining the friction damping force requirement of the single group of damping partition walls; designing elastic pieces; designing anti-shearing connecting pieces; and carrying out damage control verification. According to the damping partition wall having variable friction energy dissipation, parametric design and adjustment are carried out on the basis of the design goal of the structure, so that there are regulations to follow in the design of such a damping partition wall, and the anti-seismic toughness of the partition wall and structure can be synergistically improved.

The invention provides a wheel which comprises an outer spoke, an inner spoke and a rim, the outer spoke and the inner spoke are sequentially and fixedly connected with the inner wall of the rim in the axis direction of the rim, a plurality of mounting through holes are formed in the outer spoke, a plurality of connecting through holes are formed in the inner spoke, and the connecting through holes correspond to the mounting through holes in position in a one-to-one mode. And the outer spoke is fixedly connected with the inner spoke at the connecting through holes and the corresponding mounting through holes. According to the wheel, the hub spoke part is of a double-layer structure formed by combining the outer spoke and the inner spoke, and the multiple connecting sleeves are arranged at the positions needing to be connected, so that the outer spoke and the inner spoke do not need to bear too much torque, the lateral rigidity of the wheel can be remarkably improved, meanwhile, the material of the hub spoke of the wheel and the total weight of the wheel can be reduced, and the service life of the wheel is prolonged. Therefore, the material cost of the wheel is reduced, and light weight of a vehicle is achieved.

The utility model discloses a primary suspension system and a railway vehicle. The primary suspension system comprises a framework; the axle box body is arranged on the inner side of the side beam of the framework; the two primary rubber springs are connected between the top of the axle box body and the framework and arranged side by side in the longitudinal direction of the framework, and each primary rubber spring is of at least two-layer conical structure formed by a metal layer and a rubber layer; and the lower mounting seat is of an integrated structure, the two primary rubber springs are respectively connected with the lower mounting seat, and the lower mounting seat is connected with the axle box body. The primary rubber spring is an axle box overhead type primary rubber spring, and is compact in structure and small in occupied space; the two primary rubber springs are connected into a whole through the lower mounting base of the integrated structure, so that the two primary rubber springs have good consistency and have enough wheel set axle box positioning rigidity and vertical rigidity. The primary rubber spring is of at least two-layer conical structure formed by a metal layer and a rubber layer, and the vertical rigidity, the transverse rigidity and the longitudinal rigidity of the primary rubber spring can be well matched.

A friction damping-disc spring self-resetting support comprises a sleeve, a disc spring, a pressed limiting plate, a pulled limiting plate and a resetting-friction device. The reset-friction device is parallel to the sleeve in the length direction, and a brass friction plate is arranged in the middle of the reset-friction device. The number of the disc springs, the number of the pressed limiting plates and the number of the pulled limiting plates are all two, the pressed limiting plates and the pulled limiting plates are installed on the sleeve and the reset-friction device, and the two pressed limiting plates are located between the two pulled limiting plates. The brass friction plate is located between the two pressed limiting plates, and the disc spring is arranged on the sleeve in a sleeving mode and located between the pressed limiting plates and the pulled limiting plate. The functions of dissipating earthquake energy and self-resetting are achieved by means of compression and recovery of the disc spring, and meanwhile, relative displacement can be generated through friction damping, and friction energy dissipation is achieved. And the internal structure of the support is simple, the usage amount of steel is greatly reduced, and the bearing capacity and lateral stiffness of the reinforced structure can be improved.

The invention discloses a parameter optimization and reliability evaluation method for an active suspension control system of a high-speed train, and the method comprises the steps: combining a kinetic model with a multi-objective optimization algorithm; an active suspension secondary vertical stiffness parameter, an active suspension secondary transverse stiffness parameter, an active suspension primary radial stiffness parameter and an anti-snaking shock absorber stiffness parameter of the high-speed train are respectively used as design variables, and curve passing performance, a sperling index and a critical speed in the operation of the high-speed train are optimized; and when the optimization reaches the maximum iteration parameter and the obtained pareto optimal parameter combination meets the constraint condition, verifying the safety, stability and stability of the high-speed train until reaching the standard, thereby verifying the reliability of the active suspension control system, and finally evaluating the reliability of the active suspension control system of the high-speed train. Therefore, the running performance and the line adaptability of the train are improved.

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.

A pocketed spring assembly comprises a plurality of parallel strings of individually pocketed springs. A dimensionally stabilizing substrate is secured to at least some of the strings on one of the top and bottom surfaces of the strings. A scrim sheet is secured to at least some of the strings on an opposed surface of the strings to maintain the positions of the strings. The dimensionally stabilizing substrate is laterally rigid enough to maintain length and width dimensions of the coil spring assembly. However, the dimensionally stabilizing substrate is flexible enough to allow the pocketed spring assembly to be roll packed for shipping.

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.

One embodiment relates to a tyre with a bead profile structure, comprising a tread, sidewalls, and beads 10 for improving lateral stiffness, wherein the bead (10) has a range in which the X-coordinate is 8.8-9.7 mm and the Y-coordinate is 19.2-21.7 mm from origin (O), which is a common European Tyre and Rim Technical Organization (ETRTO) rim standard reference point of a bead outermost point (P) that is in contact with a wheel rim.

The RC column concentrated plastic hinge model research method based on lateral stiffness relates to the structural seismic technology field; the method aims to solve the problem that the simulation precision of the existing concentrated plastic hinge model is influenced by the value of the multiplier n, and the function relationship between the spring rotation stiffness and the component lateral stiffness is established, without defining the multiplier n; the specific steps include deducing the concentrated plastic hinge series model unit stiffness matrix of the cantilever column, establishing the function relationship between the rotation stiffness and the lateral stiffness, designing the state updating algorithm based on the displacement loading control, verifying the accuracy of the new model, and comparing the precision of the existing model; the experimental results show that the simulation precision of the model is improved significantly, the nonlinear behavior of the RC column can be accurately simulated without the multiplier n, and the method has important practical significance; the method has been successfully applied to the seismic analysis of a plurality of typical RC frame structures, not only simplifies the calculation process, but also improves the calculation efficiency, provides a more reliable and convenient tool for the structural seismic design, and has high popularization value.

The utility model discloses an embedded continuous support damping device for a track system, which realizes the solution of continuous support of a steel rail and can continuously provide vertical, longitudinal and transverse support stiffness of the steel rail. By configuring particle damping, the problems of Pinned-Pinned resonance of the steel rail, large wheel rail noise radiation, natural vibration of the steel rail and the like in the prior art are solved; the device continuously provides lateral limiting for the steel rail, the stress concentration problem of the fastener and the steel rail is relieved, and the problems that the fastener structure is large in maintenance amount and the like are greatly solved; according to the continuous support, the continuity of the transverse rigidity of the fastener system is guaranteed, the transverse stability of the steel rail is improved and enhanced, and therefore the defect that the transverse stability of the fastener system is poor is effectively overcome.

The invention provides a secondary suspension device, a bogie and a locomotive, a first spring element group and a second spring element group of the secondary suspension device are symmetrically arranged on a framework, and the first spring element group and the second spring element group are arranged between the framework and a supporting beam in the elastic force direction of springs; the first connecting piece and the second connecting piece are symmetrically hung at the two ends of the supporting beam, the upper ends of the first connecting piece and the second connecting piece are hinged to the two ends of the supporting beam respectively, and the lower ends of the first connecting piece and the second connecting piece are hinged to edge beams on the lower portion of the side edge of a vehicle body respectively. A supporting beam is additionally arranged above a first spring element set and a second spring element set which are symmetrically arranged on a framework of the bogie of the secondary suspension device, and edge beams on the lower portion of the side edge of a vehicle body are hung at the two ends of the supporting beam through a first connecting piece and a second connecting piece. And the transverse rigidity of the secondary suspension is reduced, and the transverse stability of the locomotive is improved.

Provide a snap - lock type vibration - damping fastener and its design method, including the snap - lock type vibration - damping fastener. On the one hand, the snap - lock type vibration - damping fastener solves the problem of unstable stiffness by using the method of isolation and limitation. On the other hand, the Z - shaped snap - lock method is adopted to ensure that when the adhesive force of the rubber layer of the composite cushion plate is insufficient, the connection between the various components of the composite cushion plate can still be maintained, avoiding the overall failure of the vibration - damping fastener due to the reduction of the adhesive force. The Z - shaped snap - lock structure design of the present invention effectively prevents the overall failure of the vibration - damping fastener, and the vertical stiffness of the fastener system is not affected by the torque of the cushion plate bolts; the lateral stiffness of the fastener system has the function of isolation and limitation and maintaining, and the stiffness is not affected by the torque of the cushion plate bolts, effectively reducing rail corrugation; the Z - shaped snap - lock structure design or the detachable structure design improves the anti - overturning and anti - torsion capabilities of the fastener system, which is suitable for popularization.

The present application relates to a new type of shock control structure system, which is mainly applied to frame structure, the system first sets negative stiffness device to reduce the lateral stiffness of the structure, prolongs its period, and reduces the seismic action; then sets viscous damper to improve the damping ratio of the first floor, controls displacement and damage; finally, in order to further control the damage of the first floor column, the first floor beam and column adopt high-performance materials, such as high-performance concrete, high-strength steel bars, high-strength steel, etc. Compared with the prior art, the present application adopts a kind of shock absorption technology, and the shock absorption effect is higher than that of the prior art; in addition, through high-performance materials and damping, the deformation and damage of the first floor are controlled, compared with shock isolation, the structure is simple, and there is no need to set up shock isolation ditch, shock isolation joint and other structural measures. The technology combines the characteristics of shock absorption, shock isolation and seismic resistance, improves the shock absorption effect, reduces the complex structural measures, and can adjust and control the shock absorption effect by increasing or decreasing the negative stiffness and damping device, so as to achieve the purpose of "controlling shock".

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 application aims to provide an improved method for considering the lateral stiffness and the corner stiffness of the spline coupling with misalignment, comprising the following steps: establishing a schematic diagram of the load and deformation of the misaligned spline coupling, deducing the load and deformation balance equation of the misaligned spline engagement state according to the deformation geometry of the misaligned spline; deducing the single-tooth engagement stiffness according to the energy method, correcting the gear tooth engagement stiffness; bringing the single-tooth engagement stiffness of the spline obtained in step (2) into the engagement force balance equation obtained in step (1), and calculating the lateral stiffness and the corner stiffness of the misaligned spline coupling. Through comparison with the finite element results, the calculation results of the application are more efficient, and the vacancy of the calculation method of the lateral stiffness and the corner stiffness of the spline coupling under the misalignment condition at the present stage is made up.

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 application discloses a multi-dimensional vibration isolation support, which comprises a horizontal vibration isolation support, a conversion base and a constraint box arranged in sequence from top to bottom; the horizontal vibration isolation support is fixed on the upper end of the conversion base; the constraint box is filled with an elastic deformation component; the lower end of the conversion base extends into the constraint box, the lower end of the conversion base is tightly matched with the inner wall of the constraint box, and the lower end of the conversion base is in contact with the upper surface of the elastic deformation component; the horizontal vibration isolation support has small lateral stiffness, can produce large deformation under the action of horizontal earthquake or vibration, and realizes the transmission of horizontal force to the top; the elastic deformation component is filled in the constraint box, and the conversion base is in contact with the elastic deformation component, the elastic deformation component can produce deformation under the action of vertical force, effectively reduces the transmission of vertical high-frequency vibration to the top, and realizes the control of horizontal earthquake and vertical vibration, so that the mechanical equipment or building is not affected by vibration.

The application provides a wheel with spiral spokes, comprising a rim and a spoke, the spoke being arranged at an axial end of the rim; the spoke comprises a central mounting disc, a plurality of spiral spokes and a spoke outer edge, at least one ventilation hole being formed between two adjacent spiral spokes in the plurality of spiral spokes; wherein the extending direction of the spiral spokes deviates from the radial direction of the spoke; the central mounting disc has a plurality of groups of ventilation holes, the plurality of groups of ventilation holes being arranged at intervals in the circumferential direction of the spoke, each group of ventilation holes comprising a plurality of ventilation holes; the cross-sectional areas of the hole sections of the ventilation holes in at least the same group of ventilation holes are uniform; and the cross-sectional areas of the hole sections of the ventilation holes in at least two groups of ventilation holes are different. The application solves the problems of insufficient lateral stiffness and stress concentration of the wheel in the prior art, the excessive weight of the wheel, and the unreasonable design and layout of the ventilation holes of the existing wheel, which leads to the problem of incoherent airflow through the wheel.

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.

The present invention relates to a design method for a parallel mechanism with both high normal stiffness and high lateral stiffness, comprising the following steps: S1, determining the motion freedom requirements of the parallel mechanism dynamic platform, establishing the mechanism motion spinor system and constraint spinor system, and establishing the branch constraint spinor system and motion spinor system of the parallel mechanism; S2, establishing a force transmission model of the parallel mechanism, and determining the maximum design criterion for normal stiffness; S3, establishing the force balance equation of the parallel mechanism, introducing an auxiliary configuration to provide an additional force system to adjust the overall stress state of the mechanism, and determining the design criterion for maximizing lateral stiffness; S4, combining the maximum design criterion for normal stiffness and the design criterion for maximizing lateral stiffness with the dynamic and static force model to obtain a parallel mechanism with both high normal stiffness and high lateral stiffness. The present invention establishes a design criterion for maximum normal stiffness of the parallel mechanism to maximize the normal stiffness of the mechanism, and has important application prospects in parallel mechanisms under heavy load conditions.

The present application belongs to the field of civil engineering, and relates to a method for determining the size of a circular arc cut corner of a steel frame embedded filler wall. The embedded wall plate is provided with a circular arc cutout, and the circular arc cutout is located at the corner of the embedded wall plate. The steel frame embedded circular arc cut corner filler wall has good seismic performance, can delay the cracking of the wall plate, and improve the ductility of the system. The lateral stiffness of the steel frame, the lateral stiffness of the filler wall, and the width of the equivalent diagonal strut are obtained by an equivalent diagonal strut model. A group of ABAQUS finite element models are established with the size of the circular arc cut corner of the filler wall as a parameter. The width of the equivalent diagonal strut model is corrected according to the simulation results. Then, a formula for calculating the ductility coefficient of the system is derived, and a relationship curve between the circular arc cut corner and the ductility coefficient of the system is drawn. The optimal size of the circular arc cut corner is determined by the critical point. The method for determining the size of the steel frame embedded filler wall circular arc cut corner combines theoretical analysis with finite element analysis, and provides a reasonable and reliable analysis method for the application of the steel frame embedded circular arc cut corner filler wall in actual engineering.

The present invention discloses a method for improving the ultimate load stiffness of a marine vibration isolator. The vibration isolator includes an upper mounting seat, a lower mounting seat and a rubber body. The upper mounting seat includes an upper seat plate and a downwardly protruding conical circular boss arranged on the bottom surface of the upper seat plate. The lower mounting seat includes a lower seat plate and a conical sleeve arranged on the top surface of the lower seat plate. The conical circular boss is inserted into the conical sleeve and is vulcanized and bonded between the outer conical surface of the conical circular boss and the inner conical surface of the conical sleeve by using the rubber body. The bottom of the rubber body is set to be concave. The groove formed at the bottom of the concave rubber body is the bottom space A of the rubber body; a space B is formed between the top surface of the rubber body and the bottom surface of the upper seat plate. The method is to reduce the spatial volume of the bottom space A of the bottom of the rubber body so that when subjected to the ultimate load, the bottom of the rubber body expands, deforms and contacts in the reduced bottom space A, thereby improving the lateral stiffness and vertical stiffness of the vibration isolator, thereby improving the ultimate load stiffness of the vibration isolator.

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.