45 results about "Buckling instability" patented technology

The invention discloses a strength simulation and checking method for a vacuum chamber Sector lifting appliance of a nuclear fusion device, which comprises the following steps of: S1, acquiring structural data of the vacuum chamber Sector lifting appliance, establishing a corresponding geometric data model, and establishing a finite element model to simulate the geometric data model, wherein the geometric data model is set as a lifting appliance three-dimensional model containing all key force bearing components; s2, defining a specified load working condition set, and performing stress analysis and buckling instability analysis operation on the specified component model under the specified load working condition; s3, the safety margin of the specified component model is calculated and evaluated so as to check and judge whether the specified structure meets the specified strength requirement or not, and the safety margin of the specified component model has the following double-threshold combined criterion. According to the invention, systematic mechanical evaluation of key structures such as a lifting lug, a pull rod and a bridge can be realized, so that the structural safety and reliability in a lifting process are guaranteed.

The invention discloses a compression test clamping tool, system and method for a variable-thickness beveled laminated plate composite material, and relates to the technical field of aviation composite material mechanical property testing. The first long chuck and the second long chuck are respectively mounted on a variable-thickness side and an equal-thickness side of the beveled laminated plate sample, and the first long chuck mounted on the variable-thickness side is gradually thickened on a conical beveled layer and a thin section of the beveled laminated plate sample. According to the invention, the additional bending moment caused by eccentricity of a neutral shaft is effectively inhibited through the gradually-changed thickening design of the variable-thickness side long chuck in cooperation with gap control, and active inhibition of buckling instability of a beveling area is realized in combination with rigid fixation and surface roughening treatment of the short chuck; the method has the advantages that buckling instability is restrained, a failure area is accurately positioned, and samples of different configurations are adapted.

The invention provides a method for evaluating the stability of an inner steel pipe of a round hollow interlayer steel pipe concrete member, and relates to the technical field of constructional engineering. An inner steel pipe buckling model of the concrete member is established through mechanical analysis of the concrete member; sandwich concrete can be regarded as an elastic foundation, an inner steel pipe is a thin-wall structure on the foundation for mechanical analysis, and compression resistance and tensile elastic foundation bed coefficients of the interlayer concrete regarded as the elastic foundation are deduced and simplified; introducing a bending wavelength calculation formula of the werkel elastic foundation long beam to calculate the bending wavelength of the inner steel pipe; and based on the thin-shell theory, a critical stress expression of the inner steel pipe is solved by utilizing an energy method. Therefore, the critical stress value of local buckling instability of the inner steel pipe in the circular hollow interlayer steel pipe concrete member can be determined, the stability of the inner steel pipe is evaluated, local instability of the inner steel pipe is prevented, the good mechanical property of the whole member is guaranteed, and design guidance is provided for engineering practice.

The utility model relates to the technical field of low-cycle fatigue tests, and discloses an anti-buckling tool for a low-cycle fatigue test sheet metal structure, which comprises a fixing assembly and a guide assembly, the fixing assembly comprises an upper fixing piece I, an upper fixing piece II, a lower fixing piece I and a lower fixing piece II, two screws are connected between the first upper fixing piece and the second upper fixing piece, two screws are connected between the first lower fixing piece and the second lower fixing piece, and cushion blocks are arranged on the inner side faces of the first upper fixing piece, the second upper fixing piece, the first lower fixing piece and the second lower fixing piece. Through the fixing assembly, the sample can be conveniently and quickly assembled, the low-cycle fatigue test requirement of the sheet metal structure can be met, and the lateral buckling instability phenomenon between a clamping part of equipment and the buckling-restrained tool can be reduced; through the guide assembly, when the sample bears a tension and compression cyclic load, the lateral buckling instability phenomenon in the thickness direction is prevented, and the stability of the sample is further enhanced.

According to the low-friction rotary necking forming method, a clamping mechanism, a necking die and the like are included, the clamping mechanism comprises a square limiting block, a rotary disc, a screw rod, a driven gear, a driving gear, an outer clamp, an inner clamp, a base and a rotary rod, a cavity is formed in the necking die, and a die inlet is formed in the cavity and used for allowing a pipe blank to be axially placed into the cavity; the diameter of the cavity is gradually reduced from the die inlet to the inside, a plurality of rollers are distributed on the inner wall of the cavity and are in rolling friction fit with the outer surface of the pipe blank, the pipe blank rotates under clamping of the clamping mechanism, the necking die moves downwards, and when the upper end of the pipe blank makes contact with the first circle of roller of the necking die, the rollers are driven by the pipe blank to rotate in a driven mode; and the rollers synchronously extrude the pipe blank to start reducing deformation, along with descending of the necking die, the contact area of the pipe blank and the rollers is gradually increased, more rollers rotate in a driven mode, and the deformation amount of the material is larger and larger till necking is completed. According to the method, the risk of buckling instability of a force transfer area of the pipe blank in the forming process can be reduced, the forming difficulty is reduced, and the forming efficiency is improved.

The invention provides a plate tension-compression buckling-restrained clamping device and a working method, relates to the field of tension-compression tests, and aims to solve the problem that data errors are easy to introduce by adopting a buckling-restrained structure during compression of a plate in a tension-compression cycle test. The elastic piece acts on the lower clamping plate through elastic force, so that the working area continuously restrains the parallel section of the sample, buckling instability of the parallel section in the thickness direction during compression is prevented, it is guaranteed that deformation is in-plane deformation all the time, the sample slides relative to the working area during tension and compression circulation, and sliding friction force can be reduced through the antifriction layer at the contact position of the lower clamping plate. The constraint force transmitted by the elastic piece is measured by the force sensor in real time, and the data can reflect the constraint strength and potential friction influence, so that subsequent correction of compression deformation data is facilitated, and errors are reduced.

The utility model discloses an ultra-high-performance cement-based thin overlay anti-crack structure which comprises a thin overlay additionally laid on an old cement concrete pavement, and the thin overlay is made of ultra-high-performance concrete. The crack isolating layer is paved on the pavement crack in advance and is positioned below the thin overlay; uHPC (Ultra-High Performance Concrete) and crack isolation are adopted as an anti-crack structure of a thin overlay, and the pavement slotting (slotting along the full length or local part of the crack) or / and the crack isolation layer are / is adopted to adapt to the shrinkage and expansion of the concrete, so that the expansion of the reflection crack is prevented, and the anti-crack performance of the thin overlay is improved. And meanwhile, pavement slotting is beneficial to avoiding buckling instability damage of the UHPC thin overlay and bonding failure of an interlayer interface caused by expansion of adjacent plates at the cracking part of the old pavement. By means of the structure, the thin overlay has good stability, crack resistance and durability, and the problems of buckling and disengaging of the thin overlay and early fracture, fatigue failure and the like under the heavy load effect can be effectively solved.

The invention discloses a flexible roll bending forming device for a ribbed integral panel, which comprises a flexible upper roller and two rigid lower rollers, a rolling channel for a panel is formed between the flexible upper roller and the two rigid lower rollers, the flexible upper roller comprises a rigid transmission shaft and an elastic layer, and the rigid transmission shaft is coated with the elastic layer. The invention further discloses a flexible roll bending forming method of the integral ribbed panel. According to the flexible roll bending forming device and method for the integral wall plate with the ribs, the problems that in the prior art, in the bending process of the integral wall plate, the surface of a skin is concaved inwards, and buckling instability and deformation of the ribs exist are solved.

This application relates to the field of vehicle simulation technology, and particularly to a method and apparatus for simulating the compressive instability of vehicle exterior panels. The method includes: performing finite element modeling of the body-in-white to obtain a body-in-white model; dividing the exterior panel into multiple regions and assigning different thickness attributes to each region to obtain a target body-in-white model; applying constraints to the target body-in-white model to obtain a first target body-in-white model, and setting a pressure head on the exterior panel in the first target body-in-white model; establishing a surface-to-surface contact pair between the pressure head in the first target body-in-white model and the exterior panel to obtain a second target body-in-white model; and controlling the displacement of the pressure head based on the second target body-in-white model to perform compressive instability analysis on the exterior panel to generate compressive instability analysis results. This method can quickly and accurately assess the compressive instability of passenger vehicle exterior panels through preliminary simulation, reducing the risk of compressive instability on the sheet metal surface of passenger vehicle exterior panels.

This invention discloses a method for near-net-shape forming of complex thin-walled irregular-shaped rings based on a dissimilar material cladding, relating to the field of material plastic forming technology. The method includes: determining the required blank material and cross-sectional allowance of the same material for ring rolling forming of the target ring; determining the dissimilar material cladding based on the cross-sectional allowance; the dissimilar material having a higher stiffness than the blank material; fabricating the blank material and the dissimilar material cladding; covering the blank material with the dissimilar material cladding and performing ring rolling to obtain an initial ring; and removing the cladding from the initial ring to obtain the target ring. This invention solves problems such as buckling instability, loss of dimensional accuracy, uneven wall thickness, excessive ellipticity, and large subsequent machining and low material utilization under large allowance design during the rolling process of thin-walled rings. It achieves high-precision near-net-shape forming of large-diameter, thick-walled titanium alloy irregular-shaped rings, improving material utilization and reducing material costs.

A method for calculating the critical value of thermal buckling of a composite metal connection structure includes: obtaining the deformation relationship of the composite metal connection structure based on the stiffness ratio of the connection parts; then correcting the thermal expansion coefficient of the metal in the composite metal connection structure to obtain the corrected thermal expansion coefficient α of the metal in the composite metal connection structure. ′ 2; Based on the critical theory of structural thermal buckling, the modified thermal expansion coefficient α of the metal in the composite metal connection structure is used. ′ 2. The critical temperature difference for buckling instability of the composite metal connection structure was calculated: where ΔT is the critical temperature difference for buckling instability of the composite metal connection structure; μ2 is the Poisson's ratio of the metal material in the composite metal connection structure; m and n are the buckling half-wave numbers of the composite metal connection structure in the length and width directions; and a and b are the length and width of the composite metal connection structure.

The application discloses a kind of super-long pile buckling instability test methods under the action of multiple load combination, comprising: through special data comprehensive computing platform, the multiple load parameters of stratum physical mechanics characteristics, pile structure geometry and axial pressure, lateral thrust and torque are collected, and the interaction relationship of clear parameters is handled by multiple load pile buckling coupling model;Using non-uniform load pile buckling deformation prediction model to deduce the deformation trend of each section of pile body, with the help of super-long pile buckling instability tracing analysis algorithm, locate the key parameters and action interval of instability;Through platform dynamic capture actual deformation and stress distribution data, after comparing and calibrating with deduced result, the critical state parameters of buckling instability and full-range deformation law are optimized and output.The method realizes the accuracy and systematicness of test under multiple load and complex stratum condition, and provides reliable technical support for super-long pile engineering safety design.

The invention relates to a numerical calculation method and device for buckling instability of a cylindrical shell structure, and belongs to the technical field of marine engineering, the numerical calculation method for buckling instability of the cylindrical shell structure comprises the steps of constructing a reinforced cylindrical shell geometric model and a water area model, and constructing a deepwater explosion model based on the reinforced cylindrical shell geometric model and the water area model; acquiring a load time history curve in a deepwater explosion scene, applying an explosion load to the deepwater explosion model based on the load time history curve, and performing numerical simulation on the deepwater explosion model by taking set boundary conditions, fluid-solid coupling and acoustic parameters of the deepwater explosion model as simulation conditions to obtain a simulation calculation result of buckling instability of the reinforced cylindrical shell. The load time history curve is used for representing underwater explosion shock waves and bubble pressure load values, and the dynamic response and structural damage characteristics of the reinforced cylindrical shell under the combined action of multiple loads are accurately reflected.

This invention discloses a design and manufacturing method for a uniform cross-section explosive load simulator based on gradient elastic metamaterials, relating to the field of impact loading. Addressing the problems of high cost per use and the susceptibility of variable cross-section elastic rods to local buckling instability under high-speed impact leading to waveform distortion in existing simulators, this invention, while maintaining the macroscopic uniform cross-section shape of the simulator, derives the ideal wave impedance gradient required to achieve the target explosive load based on the one-dimensional elastic wave propagation inverse design theory; establishes the mapping relationship between the relative density of a three-period minimal surface (TPMS) metamaterial unit cell and its equivalent mechanical parameters, and inversely solves the spatial relative density distribution function; extracts the waveform through dynamic impact finite element simulation, and introduces an impedance gradient correction factor to perform nonlinear iterative correction of the density function, obtaining a final three-dimensional metamaterial geometric model that accurately matches the waveform, and uses a flexible polymer material for additive manufacturing. This invention achieves the purely elastic, non-destructive, and reusable simulator, perfectly adapting to the stable firing of light gas cannons, and exhibiting excellent anti-instability capability and waveform fidelity under strong dynamic loads.

The invention belongs to the technical field of stress monitoring of concrete structural bodies, and discloses a lateral pressure applying device for a concrete-filled steel tube structural body and a lateral loading instability judgment method. The cloud data control center adopts an ICP algorithm to perform registration on the real-time point cloud and a pre-stored initial three-dimensional model to realize deformation quantitative analysis and surface defect evaluation, and outputs a strain anomaly index; the optical signals are demodulated in real time to generate a stress distribution matrix, the stress distribution matrix is uploaded to the cloud data control center, differential operation is performed on the stress distribution matrix and a preset reference stress field matrix, a stress offset matrix is generated, and an abnormity judgment threshold value is dynamically corrected; and coupling the strain anomaly index and the stress offset matrix, constructing an anomaly probability model, outputting three-dimensional coordinates of an abnormal region, and completing positioning of the local buckling instability anomaly of the structure. The method can effectively prevent local instability damage of the concrete-filled steel tube structure body.

The invention discloses a high-performance large-span metal bottom plate support reinforcing node and a construction method thereof, the node comprises a purline, a metal bottom plate is arranged on the purline, a reinforcing cover plate is arranged above the position, corresponding to the purline, of the metal bottom plate, and fastening devices are arranged among the purline, the metal bottom plate and the reinforcing cover plate. For a large-span metal roof bottom plate, large stress can be generated at the position of a support, and local buckling instability is prone to occurring at the position of the support. The reinforcing cover plate covers the support of the metal bottom plate, the roof bottom plate at the support is thickened to a certain degree, the skin effect can be achieved, the out-of-plane rigidity of the bottom plate at the support is effectively improved, local buckling instability of the bottom plate at the support is avoided, and the stability and safety of the roof bottom plate can be greatly improved.

The application discloses an elongated component instability simulation calculation system based on double-constraint mechanical metamaterial beam electrically-driven post-buckling, which comprises an electric driving device, a double-constraint mechanical metamaterial beam structure and a deformation monitoring system. The electric driving device is composed of a programmable direct current power supply, one mobile comb electrode, two fixed comb electrodes and three wires. The double-constraint metamaterial beam structure is connected with the mobile electrode, and the mechanical metamaterial beam generates post-buckling behavior under the action of the electric driving device. The deformation monitoring system comprises a planar rectangular coordinate system grid plate and a high-speed camera, which are used for monitoring and recording the post-buckling deformation of the mechanical metamaterial beam under a certain electric potential difference. The system can quantitatively predict the actual phenomenon of buckling instability of the elongated component of a structure in the field of civil engineering, realizes the solution of differential equations through post-buckling mechanical behavior, is not limited by computer technology, and is a more efficient, convenient and intuitive differential equation solution system.

The present application provides a kind of based on welding induction heating sheet corner welding instability control method and system, it is related to ship lightweight sheet precision construction technical field, this method includes: based on the size parameter of sheet corner welding joint, constructs the finite element grid model corresponding to sheet corner welding joint;In finite element grid model, set welding heat source, solve longitudinal plastic strain and first post-weld face deformation;The integral summation of longitudinal plastic strain is carried out, obtains first welding longitudinal shrinkage force, according to the trend mode of first post-weld face deformation, judge whether welding buckling instability occurs;If sheet corner welding joint occurs welding buckling instability, introduce induction heating heat source in finite element grid model, solve residual plastic strain and second face welding deformation, calculate second welding longitudinal shrinkage force;If less than critical buckling instability condition, confirm the process parameters of the sheet corner welding joint in the process of welding induction heating, and carry out welding hot stretching treatment.

The invention discloses a mechanical logic operation system based on multi-order buckling instability of bilateral constraint beams. The mechanical logic operation system comprises a mechanical input module, a digital output module, a storage battery and a wire. The mechanical input module is provided with two double-side constraint beam switches and a base. The digital output module is provided with an LED lamp and a bread board. The first-order buckling mode and the third-order buckling mode of the bilateral constraint beam switch are abstracted into binary bits 0 and 1 respectively, and the non-bright state and the bright state of the LED lamp are defined as digital signals 0 and 1 respectively. The mechanical input module, the digital output module and the storage battery are connected through wires to construct a circuit, and eight basic logic gates and any complex logic circuit (a half adder, a full adder and the like) can be realized. According to the system disclosed by the invention, a logical operation function under a von Neumann framework in a mechanical level is realized by utilizing conventional materials through an ingenious structural design, and a method is provided for constructing an intelligent mechanical computer with reconfigurable, repeatable programming and information processing capabilities.

The invention relates to the technical field of steel structure connecting joints, in particular to a modular steel structure buckling-restrained multi-step energy dissipation beam column joint and a transformer substation, which are suitable for connecting cross beams and stand columns and comprise hinge pieces and energy dissipation assemblies, and first energy dissipation plates comprise the first energy dissipation plate and the second energy dissipation plate; when the swing strength of the cross beam around the axis of the hinge piece relative to the stand column reaches a first threshold value, the first energy consumption plate is bent. When the swing strength of the cross beam around the axis of the hinge piece relative to the stand column reaches a second threshold value, the second energy consumption plate is bent, and the second threshold value is larger than the first threshold value. The method has the beneficial effects that by controlling the local buckling instability behavior of the beam-column joint energy dissipation plate, the bearing capacity is independently regulated and controlled while the initial rigidity of the joint is not changed, and the energy dissipation capacity of the joint is effectively improved; by means of the technical scheme, the problems that plastic hinges at the ends of the beams move outwards and the stand columns and the beams collide and conflict can be solved, and reliability is improved.

The invention relates to the technical field of vibration damping devices, and discloses a periodic yield buckling compression bar vibration damping device which comprises an upper bearing plate, a lower bearing plate, a spring and a spring. The damping devices are arranged between the upper bearing plate and the lower bearing plate, each damping device is divided into two units, each unit comprises a flexible eccentric part which is transversely arranged in a U shape and two rigid yield buckling pressing rods, and the two rigid yield buckling pressing rods are installed on the two sides of the flexible eccentric part correspondingly; the far ends of the two yield buckling pressing rods are movably connected to the close sides of the upper bearing plate and the lower bearing plate correspondingly. The combined structure of the flexible eccentric part and the yield buckling pressing rod is arranged between the upper bearing plate and the lower bearing plate, energy dissipation can be achieved through cooperation of deformation of the flexible eccentric part and buckling instability of the yield buckling pressing rod under the action of vibration loads, vibration is effectively restrained, and the stability of the structure is improved.

The invention discloses a method for simulating the buckling state of a storage tank under the combined action of typhoon and rainfall, and the method comprises the steps: obtaining the wind pressure pulsation and liquid level change characteristics of the typhoon, and generating a non-stationary load sequence; constructing a three-dimensional finite element model of the storage tank, coupling multiple physical fields, and determining initial stress distribution; the overall buckling instability process is simulated, and key node displacement is obtained; judging local stress concentration according to the displacement threshold value to obtain a stress concentration distribution diagram; calculating accumulated damage and resistance deterioration degree under multiple typhoons based on a damage accumulation model; simulating a damage extension track from integral buckling to local damage, analyzing a high-risk area formation mechanism, and predicting a failure mode; and outputting the residual service life index of the storage tank under the composite load in combination with the residual service life evaluation framework. According to the method, accurate pre-judgment and quantitative evaluation of the full-life-cycle failure risk of the storage tank under the typhoon precipitation composite load are realized.

The application relates to the technical field of precision mechanics measurement, and discloses a heavy-load high-precision micro-thrust measurement method based on a bionic knee joint inverted pendulum. A micro-thruster is fixed at the center of a top plate of an inverted pendulum thrust measurement device through a customized tool, a nozzle direction is perpendicular to the side of a C-shaped rigid arm and parallel to the top plate; the top plate is connected with the bottom of a lead-angle-shaped flexible hinge in the upper layer through a fixing bolt, four lead-angle-shaped flexible hinges are respectively arranged on the four corners of the top plate and are centrally symmetric; one end of the C-shaped rigid arm is connected with the top of the lead-angle-shaped flexible hinge in the upper layer, and the other end is connected with the bottom of the lead-angle-shaped flexible hinge in the lower layer. Through the structural design of the bionic knee joint inverted pendulum, the lead-angle-shaped flexible hinge in the application is in a stretching state under the action of a load, so that the measurement error caused by buckling instability is avoided, and the overall stability of the device and the precision of thrust measurement are greatly improved.

The invention discloses an optimization method for calculating the steel quantity requirement of an offshore photovoltaic support, which relates to the technical field of offshore photovoltaic supports and aims to solve the problem of inaccurate acquisition of the steel quantity of the support during the installation of the offshore photovoltaic support. Through a variety of finite element analysis methods, the invention can comprehensively evaluate the performance of the offshore photovoltaic support under different working conditions. Through buckling analysis and fatigue analysis, the bearing capacity and fatigue life of the support under extreme conditions can be evaluated, so as to avoid safety problems such as buckling instability or fatigue failure of the support during use. By accurately analyzing the performance of the support under different working conditions, the steel quantity can be more reasonably determined, avoiding cost waste caused by over-design. Setting the material properties in the geometric model according to the material data can truly reflect the mechanical properties of the support material. Dividing the geometric model into hexahedral elements can better capture the deformation and stress distribution of the structure under the action of loads.

The invention discloses a dynamic pile sinking displacement monitoring system and method based on computer vision. The method comprises the steps of scale mark manufacturing, hardware assembly arrangement, image data collection, pile body displacement analysis, pile body inclination analysis, pile body strain analysis and structural damage early warning. The scale marks are matched with the compensation light source and the high-frame-rate industrial camera, so that the problem that a traditional sensor is easily damaged and interfered in the pile body monitoring process is solved; the strain value of the pile body is obtained through inversion according to the relative distance change of the pile body scale marks at the hammering moment, and real-time, continuous and non-contact monitoring of the strain value of the pile body is achieved; three key parameters of displacement, inclination and dynamic strain are monitored at the same time through the same visual system, the construction problems of pile body inclination overrun, pile body fracture, buckling instability, pile top fragmentation and the like are accurately recognized, early warning is triggered in time, the safety of dynamic pile sinking construction is effectively improved, and the safety risk is reduced.

The invention discloses a boom structure and an aerial work platform, and belongs to the technical field of engineering machinery. The arm support structure comprises a plurality of arm sections which are sequentially arranged in a nested mode, each arm section comprises four side plates, and the long sides of the four side plates are sequentially connected through reinforcing pieces to form a box type structure. The reinforcer is of a cylindrical structure, and the axial direction of the reinforcer is the same as the length direction of the side plate, namely, the side plate is connected to the peripheral wall of the reinforcer. Furthermore, a sliding block is arranged between the four corners of every two adjacent arm sections in a profiling mode. And the two adjacent arm sections realize sliding extension and retraction through the sliding blocks. Compared with a cantilever crane structure in the prior art, the cantilever crane structure has larger rotational inertia, and the reinforcers serve as the corners of the four side plates to occupy part of the section width, so that the buckling instability resistance is enhanced. In addition, the reinforcer can bear the main pressure load of the sliding block, the bending moment received by the welding seam is obviously reduced, and obvious stress concentration of the welding seam near the sliding block is avoided.

The invention belongs to the technical field of composite material structural strength tests, and discloses an edge restraint device and method for a residual strength test of a composite material sheet after impact, and the device comprises a base, a side support, a top plate and a set of edge distributed clamping system. The system is composed of a bottom clamping module, a top clamping module and a plurality of pairs of lateral clamping modules which are arranged side by side and can be independently adjusted, and the bottom edge, the top edge and the two side edges of a test piece can be accurately and adjustably clamped in a distributed mode. Through adjusting mechanisms such as strip-shaped holes, screw holes and puller bolts on each module, optimized attachment with each edge of the test piece and clamping force control can be realized, crushing of the edge of the test piece and premature overall buckling instability in the compression test process are effectively prevented, and the accuracy and reliability of a residual strength test result after impact are ensured. The device is particularly suitable for testing the large-size composite material thin plate.

This invention discloses an electrically controlled switching valve and an air suspension system. The energy-absorbing plate of the electrically controlled switching valve is entirely embedded in an embedded groove. When the moving iron core impacts the energy-absorbing plate, the plate is not subjected to radial shear force. Simultaneously, the arc-shaped boss on the end face can quickly deform to better absorb the instantaneous impact energy upon initial contact, achieving a better energy absorption effect and mitigating the impact force on the main body area of ​​the energy-absorbing plate, thereby reducing the lateral deformation amplitude of the main body area. Furthermore, the arc-shaped boss has gaps between itself and the inner and outer edges of the energy-absorbing plate, providing ample radial expansion space. Combined with the arc-shaped design, buckling instability and localized stress concentration are avoided. Moreover, the movable shaft of the valve core can move relative to the moving iron core. When the valve core contacts the valve seat, the reaction force of the spring can decelerate the moving iron core to a certain extent, reducing the impact force of the moving iron core on the energy-absorbing plate. The combination of these design features effectively improves the service life of the energy-absorbing plate.

The invention relates to a debugging method of a compact quasi-zero stiffness vibration isolator constructed by a single inclined spring, the debugging method is based on the compact quasi-zero stiffness vibration isolator constructed by the single inclined spring, one end of the single inclined compression spring is hinged to a fixed support, and the other end of the single inclined compression spring is hinged to the top end of a vertical spring; the bottom end of the vertical spring is fixed; the inclined springs and the vertical springs are compression springs, and guide rods are arranged in the springs for supporting so as to prevent buckling instability. The single inclined spring generates negative stiffness in the vertical direction and is connected with the positive stiffness of the vertical spring in parallel, and the quasi-zero stiffness vibration isolator is constructed. The debugging method comprises the steps that the dimensionless pre-compression amount, the dimensionless projection length and the spring stiffness ratio of the oblique compression spring are determined, parameters are made to meet the quasi-zero stiffness parameter relation, and the nonlinear quasi-zero stiffness characteristic can be obtained; the quasi-zero stiffness vibration isolator is simple and compact in structure, few mechanical parts are used, and miniaturization can be achieved.

The invention discloses an additional type buckling-restrained series mechanism device which comprises a pressed component, a buckling-restrained component and a connecting component. Two rigid sheets are fixedly connected to the pressed component; at least one restraining mechanism is arranged between the two rigid sheets; the restraining mechanism comprises a plurality of rigid blocks which are hinged end to end and connected in series; the rigid blocks at the head and tail ends are respectively hinged with the two rigid sheets; the restraining mechanism and the pressed component are arranged in parallel at an interval, and the restraining mechanism is used for providing lateral restraining when the pressed component is pressed and restraining buckling instability of the pressed component. The rigid blocks and the rigid pieces are connected in series through the micro hinges, through the linkage effect between the series connection mechanisms, overall buckling of the component under the pressure effect can be effectively restrained, effective lateral constraint is provided for the pressed component, and the reliability of the component is improved. And the stress performance of the protected component in the pressed state is improved, meanwhile, the stress performance of the component in the pulled state is not affected, the device has the good buckling prevention capacity, and the ultimate bearing capacity and the energy dissipation capacity of the component are remarkably improved.