85 results about "Structural rigidity" patented technology

The application discloses a numerical control rotary table integrated structure, which comprises a linear slide rail, a linear slide table and a rotary shaft table. The linear slide rail is arranged along a preset direction and is provided with slide rail grooves which are parallel to each other on the two side walls. The linear slide table is symmetrically provided with slide blocks which are matched with the linear slide rail at the bottom, and the slide blocks are embedded in the slide rail grooves. A circular groove is formed in the middle of the linear slide table, and a plurality of positioning holes are formed in the groove bottom of the circular groove. The rotary shaft table is provided with positioning columns which are matched with the positioning holes at the bottom, and the rotary shaft table is installed in the circular groove through the cooperation of the positioning columns and the positioning holes, and the outer peripheral wall of the rotary shaft table is tightly combined with the inner wall of the circular groove. Through the structural optimization and the innovative design of the linear slide rail, the linear slide table and the rotary shaft table, the assembly error in the traditional structure is eliminated, the overall height of the rotary table is reduced, the structural rigidity is improved, and the machining precision, the stability and the service life of the numerical control rotary table are improved.

This invention provides a method for analyzing assembly deviations in ultra-large structures with non-uniform stiffness condensation, comprising the following steps: S1: dividing the ultra-large structure into a plastic region and an ultra-large stiffened elastic region; S2: constructing a model for the non-uniform stiffness condensation of ultra-large structures suitable for the network-like concentrated distribution characteristics of assembly deviations; S3: establishing an overall stiffness model of the ultra-large structure described by the weld region and its interface; S4: considering the influence of welding deformation during the welding process, introducing a welding stress field, and establishing a welding deviation analysis model based on the deformation coordination relationship before and after assembly in the plastic region; solving for the welding deviations of the ultra-large structure, thereby realizing the prediction and analysis of assembly deviations in ultra-large stiffened structures. This invention's method for analyzing assembly deviations in ultra-large structures with non-uniform stiffness condensation enables the prediction and analysis of assembly deviations in ultra-large structures with overall flexibility and local rigidity, providing a theoretical basis for compensation and control of assembly deviations in ultra-large structures, and improving product assembly quality.

The application provides a transformer fault monitoring method and system, which comprises the following steps: collecting multi-source monitoring data at a risk monitoring section in a tunnel; calculating a first state index reflecting structural stiffness degradation and a second state index reflecting a structure-seepage field coupling stability coefficient under the action of seepage water; calculating a comprehensive state index of the monitoring section at a target time through a preset dynamic evaluation model, and generating corresponding structure state grades and early warning information. Through the fusion of multi-source heterogeneous monitoring data and the construction of a dynamic evaluation model, more accurate and forward tunnel structure state perception and early warning can be realized, the limitations of traditional single threshold alarm are overcome, the lining mechanical property attenuation, groundwater seepage activity and water corrosion effect are coupled and quantitatively evaluated through the calculation of the structural stiffness degradation index and the seepage-structure coupling stability index, and the accuracy of state discrimination is significantly improved.

The application belongs to the technical field of robot control, and relates to a robot collision-free trajectory dynamic planning method and system for a machining unit, which comprises the following steps: obtaining kinematic parameters of each rigid arm segment and operating temperatures of each joint motor; constructing a space-dependent chain for determining minimum geometric gaps between each rigid arm segment and an environmental obstacle based on the kinematic parameters; determining an effective approaching speed according to a gap change rate of the minimum geometric gaps, combining equivalent structural stiffness mapped by the operating temperatures and preset dynamic parameters, and deducing a composite dynamic safety bottom line composed of a physical deceleration distance, an inertial sliding distance and an inertial flexure intrusion distance; and performing anti-collision control intervention on the robot based on a trajectory convergence index determined by the minimum geometric gaps and the composite dynamic safety bottom line. The application can realize dynamic compensation of multi-dimensional limit displacement, perceive over-travel collision risks in advance, and improve the precision of anti-collision intervention under complex limit working conditions.

This invention discloses a multi-section strain balance assembly integrated into an object, belonging to the field of hydrodynamic testing force measurement technology. It addresses the problems of traditional force balances, such as the need to disassemble the test model, numerous connection points, large installation errors, limited available force measurement sections, susceptibility to flow field interference, and difficulty in accurately measuring strain in thick-walled models. The balance assembly uses a hollow cylindrical section as the main body of the test substrate, with multiple sets of force measurement sections spaced along the substrate's axial direction. Each force measurement section is formed by thinning and slotting / perforating the inner and outer surfaces of the substrate to create load-bearing columns. Strain gauges for acquiring strain signals are attached to the inner and outer surfaces of these columns, enabling multi-dimensional force load measurement. The force measurement sections and the test substrate are integrally formed, allowing for flexible adjustment of the number of load-bearing columns. A single set of force measurement sections can be used independently as a multi-dimensional force balance. This invention achieves simultaneous multi-section force measurement without compromising the integrity of the model, balancing structural stiffness and force measurement sensitivity, significantly improving measurement accuracy, testing efficiency, and versatility.

The application discloses a design method of a multi-working-condition-constrained additive manufacturing point array light-weight structure mirror, and simultaneously faces multiple scenes of machining stress, detection gravity action and assembly stress, so that the surface shape errors under different stresses are balanced and meet design indexes; the point array period, the point array rod diameter and the mirror surface thickness are determined according to the machining stress deformation; the back plate thickness and the side plate thickness are determined according to the detection gravity deformation; and the point array flexible structure is determined according to the assembly stress deformation. The design method of the multi-working-condition-constrained additive manufacturing point array light-weight structure mirror adopts the above steps, fills the structure and the flexible structure based on the point array structure design, compared with the existing mirror light-weight structure design method, the light-weight mirror obtained by the design balances the structure stiffness under different stresses, balances the surface shape errors of the mirror under different stresses, and the design parameters have a clear corresponding relationship with the stress scenes, and have the characteristics of easy parameter adjustment.

The application discloses a multi-degree-of-freedom cooking mechanical arm, which comprises a base and a stabilizing mechanism, wherein the upper end of the front side of the base is provided with three deflectable joints I, the upper end of the upper joint I is provided with a rotatable joint II, the upper end of the joint II is provided with a rotatable chuck, and the stabilizing mechanism comprises a limiting column, a limiting hole, a damper, a steering wheel I and a stabilizing assembly; the limiting column is arranged on the left and right sides in the interior of the joint I respectively, the limiting holes are arranged on the left and right sides of the lower end in the interior of the joint II and the upper two joints I, the limiting column is arranged in cooperation with the limiting hole, the dampers are arranged on the left and right sides of the upper two joints I, and the placing grooves are arranged in the middle of the upper end in the interior of the joint I. The multi-degree-of-freedom cooking mechanical arm can obviously improve the structural rigidity and the anti-vibration capacity of the whole mechanical arm through the rotating support of the bearing, the stepless energy absorption of the damper and the hard locking of the limiting column.

The application discloses a front suspension system of a heavy truck cab and relates to the technical field of suspension systems.The front suspension system comprises a connecting rod and front suspensions arranged at the two ends of the connecting rod, wherein the front suspensions comprise a frame connecting frame, a swing arm adapter frame, a swing arm body, a cab connecting frame and a shock absorber, and the frame connecting frame comprises an installation seat in an inverted L-shaped structure.The application realizes systematic functional integration and structural optimization on the frame connecting frame, the swing arm adapter frame, the swing arm body and the cab connecting frame.In terms of functional integration, the functions of frame connection, swing arm support, limiting, shock absorber connection, height valve installation, cab connection and swing arm hinging are realized in a concentrated manner, so that the overall weight of the system is reduced.In terms of structural strength and light weight, the components are provided with optimized cross-sectional shapes, reinforcing rib layouts and weight-reducing hole distributions, so that the overall structural rigidity and strength are ensured, and remarkable system weight-reducing effects are achieved.

The application discloses a continuous type mechanical arm in the technical field of micro mechanical arms and an acquisition method thereof, and aims to solve the problems of the continuous type mechanical arm and the acquisition method thereof in the prior art. The continuous type mechanical arm comprises two spiral bodies and engaging structures of the two spiral bodies. The two spiral bodies can be engaged with each other, and the engaging structures can meet the action requirements of the curved arm body through the engagement effect between the engaging structures, and can provide better structural rigidity, thereby significantly inhibiting the axial instability and relative slip of the framework under high antagonistic tension from the bottom layer of the configuration, breaking through the technical bottleneck of the bearing limitation of the conventional flexible framework, realizing the significant enhancement of the macro equivalent rigidity, and improving the bearing capacity of the mechanical arm. The corresponding acquisition method fully considers that the engaging structure is the primary factor influencing the bending and action capacity of the continuous type mechanical arm, and therefore, the outer diameter of the mechanical arm is taken as the primary design parameter, and the iterative design of the design parameters of the engaging structure is carried out based on the design background. The method is simple and clear, and the design efficiency is improved.

A construction method, system, device and medium for full-jacking-point synchronous unloading, relate to the field of intelligent manufacturing. In the method, the structural parameters and the site elevation of the net rack ball node of each jacking point are measured to obtain measured data, the length of the jacking equipment support pipe is adjusted, the pre-pressing load is calculated according to the structural parameters and the adjusted jacking equipment and is applied, each jacking point on the jacking equipment after pre-pressing is controlled to synchronously descend by a first predetermined descending amount and the initial contact state is monitored to obtain, the descending process of each jacking point is differentially regulated according to the deflection data to obtain the leveling state, the second predetermined descending amount is determined, each jacking point is controlled to execute synchronous staged descent according to the second predetermined descending amount, and the load transfer state, the load change amount and the structural overall deformation parameters are monitored in real time, and when the conditions are met, the unloading construction is determined to be completed. The technical scheme provided by the application can effectively solve the problem of non-uniformity of force of each support caused by structural stiffness difference.

This utility model relates to the field of Bailey beam installation technology, and provides a horizontal bracing structure at the intersection of Bailey beams, including a first support beam, a connecting beam, and a second support beam. The first support beam includes a first branch beam and a second branch beam, which are aligned on the same straight line. One end of the connecting beam is connected to the first branch beam, and the other end is connected to the second branch beam. The second support beam intersects with the first support beam, and the second support beam is at the same height as the first support beam, abutting against the connecting beam. By intersecting the first and second support beams at the same height and using the connecting beam to achieve abutment support between them, the overall height of the structure is effectively reduced. At the same time, the horizontal bracing truss enhances the stability of the nodes, offering advantages such as reduced construction costs, increased structural stiffness, and adaptability to space-constrained environments.

This utility model relates to the field of precast composite slabs. Its purpose is to provide an ultra-heavy precast composite slab, comprising a composite slab body. Within the composite slab body, a reinforcing cage, several strip-shaped reinforcing trusses, and prestressed reinforcing bars are pre-embedded. The upper part of the reinforcing cage extends beyond the top surface of the composite slab body, with both ends of the extended portion pre-cast with concrete to form reinforcing beam ends, while the middle section of the extended portion forms a reinforcing beam casting area. The strip-shaped reinforcing trusses are located around the reinforcing beams, and their upper parts also extend beyond the top surface of the composite slab body. The prestressed reinforcing bars are located below the strip-shaped reinforcing trusses, with their ends extending beyond the left and right end faces of the composite slab body. This utility model possesses excellent structural rigidity, load-bearing capacity, and superior secondary bonding with cast-in-place concrete.

This utility model provides a gear-shaping clamp, belonging to the field of clamping technology. It solves the problems of high assembly difficulty and high precision requirements caused by excessive parts in existing technologies. This utility model includes a main housing, a positioning ring, a mounting housing, an elastic chuck, a clamping rod, a spacer, and a limiting ring. Connecting rings are formed at both ends of the main housing, with a first limiting hole in each connecting ring. A first connecting step and a second connecting step are respectively formed on both sides of the main housing. A mounting protrusion is formed on one side of the main housing of the first connecting step, and the positioning ring is sleeved on the outside of the mounting protrusion. A connecting ring is formed at one end of the mounting housing, with a second limiting hole inside the connecting ring. The elastic chuck is fixedly installed inside the mounting housing, with a third limiting hole in the elastic chuck. A connecting recess is formed on one side of the spacer, with a fourth limiting hole in the spacer inside the connecting recess. A fifth limiting hole is formed on the limiting ring. The clamping rod passes through each limiting hole sequentially and connects to the elastic chuck. This utility model has the advantages of simple assembly, low installation difficulty, strong structural rigidity, and good chuck buffering effect.

The application discloses a kind of four branched chain parallel structure-based bionic robot neck joint mechanism, including static platform, dynamic platform, the static platform, dynamic platform between being provided with by two SPR branch chain composition SPR branch chain group and by two SPU branch chain composition SPU branch chain group, the SPR branch chain is constraint branch chain, dynamic platform under the action of two SPR branch chain, two SPU branch chain, relative to static platform output includes three rotational degrees of freedom and one translational degree of freedom four degrees of freedom space movement.The bionic motion ability of the application is strong, adopts 2SPR-2SPU parallel topology configuration, can realize three rotational degrees of freedom, namely, pitch, lateral swing and so on, and one translational degree of freedom, namely, vertical stretch, effectively simulate the flexible posture of biological neck, satisfy the head movement demand of bionic robot.The dynamic platform of the application, static platform adopts staggered trapezoidal hinge point layout, optimizes the mechanical transmission performance, enhances the structural rigidity of mechanism.

This invention relates to the field of ultra-precision machining equipment technology, and provides a frame-to-frame cross slide and milling center, comprising: an X-axis feed mechanism including a crossbeam and a slide; the crossbeam is arranged along the X-axis and configured as a hollow frame structure with continuous inner sidewalls to form an X-axis extending installation space; the slide spans the crossbeam and is slidably connected to the crossbeam on both sides through a connecting structure; a Z-axis feed mechanism is connected to the slide and extends to the installation space at its bottom, so that the X-axis feed mechanism and the Z-axis feed mechanism form a cross. This configuration can significantly shorten the force transmission path of the feed system, reduce the equivalent overhang length of the vertical feed axis, thereby improving the overall structural rigidity and deformation resistance, and ensuring machining accuracy.

This invention provides a method for mid-span closure using a double-hanging-basin collaborative operation. The method involves moving the main bodies of the hanging baskets on both sides of the closure section to their maximum centering distance; connecting the two sliding beams as a whole and anchoring them to the pre-formed segment; disconnecting the sliding beams from the main truss to form an independent load-bearing track; disconnecting the formwork system from the main truss and suspending it on the sliding beams; synchronously moving the formwork system to the closure section position and fixing it to the main truss to create a closed pouring space; and finally, positioning the inner formwork and pouring concrete. This invention fully utilizes existing hanging basket components for in-situ reuse, eliminating the need for additional closure scaffolding. It avoids the cumbersome procedures of retracting the hanging baskets and reinstalling the formwork in traditional processes. While significantly shortening the construction period and reducing costs, it enhances the structural rigidity and safety of the construction system and effectively ensures the construction accuracy and appearance quality of the closure section.

The application discloses a large-aspect-ratio flying wing layout aircraft rigid-elastic coupling aeroelastic scaling model design method. The method is based on the rigid-elastic coupling aeroelastic equation, the key parameters to be matched are determined through dimensionless, including inertia ratio, reduced frequency and Froude number, and length, speed and density are used as basic scales to derive target scaling parameters such as mass / inertia, structural stiffness and modal frequency. When the flow similarity is difficult to meet, the iterative optimization strategy of lift and moment coefficient error minimization is introduced, and the speed ratio and mass / inertia scaling constraints are coupled into the structural arrangement variable optimization to realize the coordination of static / dynamic aeroelastic compatibility. The model design adopts the spar-pod structure system of'stiffness beam + external shape', and the mass / inertia and modal matching are completed by adjusting the beam section and counterweight, and the flutter critical speed, frequency and shape are used as the similarity verification indexes. The method can be used for early evaluation and verification of large-aspect-ratio flying wing aeroelastic phenomena.

This application relates to the field of variable stiffness structural design, providing a porous structure with a wide range of in-situ adjustable stiffness, including a pressure-bearing component and a supporting component. The pressure-bearing component has symmetrical elastic ribs on both sides of its transverse direction, with at least two openwork structures on each side of the elastic rib. The supporting component includes a prismatic member that slides between the elastic ribs on both sides when nested. The ratio of the inner and outer diameters of the pressure-bearing component is defined as α = d / D, and the ratio of the height of the prismatic member to the pressure-bearing component is defined as β = h / H, where both α and β are positively correlated with the structural stiffness. The supporting component slides with the pressure-bearing component, and stiffness adjustment is achieved by changing the overlap area between the prismatic member and the elastic ribs through longitudinal adjustment of the supporting component's position. This structure achieves the beneficial effects of simple structure, wide stiffness control range, and multi-dimensional adjustability through the coordinated cooperation of dimensional ratio parameters and the adjustment of the supporting component's position.

This invention discloses a biomimetic robot neck joint mechanism based on a four-branch parallel structure, comprising a static platform and a moving platform. Between the static and moving platforms are an SPR branch group consisting of two SPR branches and an SPU branch group consisting of two SPU branches. The SPR branches are constraint branches. Under the action of the two SPR branches and the two SPU branches, the moving platform outputs four degrees of freedom spatial motion relative to the static platform, including three rotational degrees of freedom and one translational degree of freedom. This invention exhibits strong biomimetic motion capabilities. Employing a 2SPR-2SPU parallel topology, it can achieve three rotational degrees of freedom (pitch, yaw, etc.) and one translational degree of freedom (vertical extension / retraction), effectively simulating the flexible posture of a biological neck and meeting the head movement requirements of biomimetic robots. The moving and static platforms of this invention adopt an interlaced trapezoidal hinge point layout, optimizing mechanical transmission performance and enhancing the structural rigidity of the mechanism.

This utility model discloses a portable five-axis parallel robot, relating to the field of machining robot technology. The utility model includes a moving platform constraint truss, a fixed platform support frame, a parallel drive guide chain assembly, and a moving platform. The fixed platform support frame consists of symmetrical side support frames, a bottom connecting frame, and diagonal support reinforcing beams, forming a high-rigidity support frame. The moving platform constraint truss forms a closed spatial structure through rigid rods and multi-directional connection nodes, with connecting plates enhancing its overall integrity. The parallel drive guide chain assembly contains five sets of drive guide chains, with guide sleeves guiding the chain transmission rods for precise movement, and multiple sets collaboratively driving the moving platform. This utility model achieves smooth five-degree-of-freedom motion of the moving platform and end effector by optimizing the rigidity of the support structure, enhancing the stability of the constraint truss, and implementing multi-chain collaborative drive, balancing portability and high precision.

This invention discloses an overload prevention control method and system for telescopic boom cranes based on boom strain, relating to the crane-related field. The method includes: arranging strain acquisition units along the length and circumference of multiple boom sections to acquire multi-dimensional strain data and construct a spatial strain distribution field; analyzing the consistency of strain response to identify local abnormal regions and determine the structural stiffness degradation state; extracting asymmetric strain components on the boom cross-section to construct force flow offset characterization parameters; performing time-series evolution analysis to obtain basic strain components and additional load components, and inverting the equivalent load and its application position on the boom; performing a prediction of the boom's true load-bearing capacity; and optimizing the control strategy based on safety constraints configured according to the prediction results. This application solves the problems of existing boom overload prevention control systems, such as inability to adapt to structural changes, incomplete monitoring, and difficulty in responding to overload risks. It achieves accurate adaptation to boom structural changes, comprehensive monitoring of the stress state, and effective response to overload risks.

This invention provides a method, equipment, and medium for predictive calculation of hanging basket structures based on multi-source data. It establishes a standardized parameter library by collecting hanging basket design parameters, actual processing data, and real-time on-site monitoring data. A complete structural mechanics model of the hanging basket is built, the overall structural stiffness matrix is ​​calculated, initial design loads are applied, and static equilibrium equations are solved. The structural stiffness matrix is ​​corrected using actual processing data, and the actual load vector is corrected using unloaded static data. Based on the corrected stiffness matrix and load vector, the structural mechanics equations are resolved, and deviations are calculated using construction dynamic data as constraints. If the deviation exceeds a threshold, the structural parameters are iteratively corrected, and the solution is re-solved and compared. This invention achieves high-precision simulation and real-time tracking of the hanging basket's stress state by integrating multi-source data from design, processing, and on-site data and introducing a dynamic correction mechanism, ultimately achieving precise control over structural safety and construction alignment.

This application belongs to the field of new energy device technology, specifically relating to a truss for a wind turbine tower and the wind turbine tower itself. The truss of the wind turbine tower includes: support legs, comprising isosceles triangular structures formed by connecting steel pipes, with the apex of the isosceles triangular structures pointing downwards to form support feet; the base ends of four isosceles triangular structures are sequentially connected to form a quadrilateral support top, which is used to connect and support a wind turbine generator; a tensioning frame, fixedly connected between two adjacent isosceles triangular structures; and a platform, including a planar structure simultaneously fixedly connected between the four support legs, with at least two platforms arranged between the four support legs, and two of the platforms being parallel to the support top. Through the above-mentioned design, this application reduces the amount of steel used, facilitates processing and transportation, lowers project costs, and provides high structural rigidity, facilitating hoisting and improving overall structural reliability.

This invention provides a composite material truss-type unmanned aerial vehicle (UAV) fuselage structure and the UAV itself, employing an inverted triangular layout. It includes a main tube, support tubes, segmented multi-port joints, wing-body joints, a nose cone, and a tail cone. The main tube consists of three carbon steel tubes with the same outer diameter and varying wall thickness, divided into multiple sections based on process feasibility. The support tubes include four types: transverse support tubes, upward-sloping support tubes, two-sided inclined support tubes, and two-sided reinforced support tubes, all with the same outer diameter. The segmented multi-port joints include four types: four-way joints, five-way joints, six-way joints, and seven-way joints, each divided into two segments and press-bonded to the main tubes and support tubes. A multi-port joint below the nose cone connects to the fuselage, while upper lugs connect to the wings and tail. The nose cone and tail cone are contoured. This invention improves the overall structural rigidity and instability resistance by coordinating the load distribution across the truss components, and allows for flexible installation of onboard equipment.

This utility model discloses a grooved rupture disc anti-fragmentation structure, relating to the technical field of safety pressure relief devices. It includes a rupture disc and a reinforcing ring. Through an integrated interlocking design of the rupture disc and reinforcing ring, this utility model ensures that after rupture, fragments are 100% confined within the reinforcing ring's rib grid without the need for external clamps, completely eliminating the risk of fragmentation. It is suitable for large-diameter, high-pressure applications and combines high-precision rupture with fragment confinement. Based on a short-bridge and radially weakening groove collaborative detonation mechanism, the short bridge acts as a precise fracture trigger point, ensuring rupture pressure deviation. The quantitative matching of the weakening groove depth and the reinforcing rib tilt angle α maintains structural rigidity while achieving directional splitting. Furthermore, the reinforcing ring adopts a full-parameter matching design with the rupture disc, reducing customized processing steps and lowering operating costs. The reinforcing ribs symmetrically span across both sides of the weakening groove, forming a topologically interlocked pressure-resistant structure. The circular holes collaboratively release central stress, improving the stability of the rupture pressure.

This application discloses a structural optimization design method for a cassette optical system to address the technical problem of image quality degradation caused by structural deformation under high-impact and high-overload conditions. The method includes: establishing a parametric finite element model comprising a primary mirror, a secondary mirror, and a supporting structure; obtaining the displacement vector through equivalent static analysis; calculating the structural stiffness characterization function and three image quality characterization functions (change in primary-secondary mirror spacing, primary mirror deformation, and secondary mirror deformation); establishing a multi-objective weighted optimization model; solving for the optimized structural element density distribution; and reconstructing the structural model. This method can effectively suppress structural deformation under high-impact and high-overload conditions, improving the stability and reliability of the system's image quality.