698 results about "Structural rigidity" patented technology

The invention relates to the technical field of structure optimization design, and particularly discloses a box-type beam structure lightweight design method based on topological optimization, which comprises the following steps: constructing a multi-physics field coupled three-dimensional parameterized model, and performing cross-scale analysis on integrated structure rigidity, thermal deformation, vibration mode and fatigue life to obtain a three-dimensional parameterized model; a variable density method and level set method mixed topological optimization strategy is adopted, and an initial material distribution scheme meeting the structural function integrity is generated by modeling the relationship between density and stress strain; starting a quantum genetic algorithm and deep reinforcement learning fused intelligent optimization engine; according to the method, through the multi-physics field coupled three-dimensional parameterized model, a variable density method and level set method mixed topological optimization strategy is combined, the relation between the structural lightweight target and the additive manufacturing process is effectively balanced, multi-physics field analysis of thermal response, vibration, fatigue and the like is introduced, and the structural lightweight target is obtained. And it is guaranteed that the box-type beam meets the mechanical property and other functional requirements in actual application.

The invention relates to the technical field of design analysis, in particular to a soft soil deep foundation pit earth excavation construction scheme planning method and system.The soft soil deep foundation pit earth excavation construction scheme planning method comprises the following steps that a three-dimensional geological model is built based on geological exploration data, and rheological parameters, shear strength parameters and permeability coefficients of all soil layers are extracted to serve as layering parameters; according to the layering parameters and preset supporting structure rigidity parameters, a soil body rheological rate compensation coefficient is calculated, and an earthwork block excavation scheme with the grading thickness difference is generated; and in the excavation process, the displacement rate and pore water pressure data of the supporting structure are collected in real time, and when a monitoring value exceeds a preset threshold value, a dynamic adjustment instruction of the block excavation scheme is triggered. According to the method, the layering thickness and the blocking form are intelligently controlled according to different sensitivity levels, the matching coping capacity for soft soil instability inducements is improved, and the limitation that a single physical parameter dominates in traditional blocking design is broken through.

The invention provides a thermal-mechanical coupling topological optimization method for a thin-wall non-uniform filling structure, and the method comprises the steps: 1, building a finite element model according to design requirements, and determining a non-design domain and a design domain; 2, initializing a design variable, and then obtaining a local volume fraction polymerization field through one-step filtering; 3, describing the distribution of a material in a design domain; 4, thermal coupling finite element calculation is carried out, and a structural displacement field U is solved; step 5, performing corresponding sensitivity analysis; 6, submitting the sensitivity to a moving asymptote algorithm solver to update an overall topology field and a dot matrix density field; and step 7, checking whether an iteration stop condition is met or not. According to the invention, the lightweight design of the power battery module bracket structure facing the thermal elasticity problem is realized; according to the power battery module support with the thin-wall non-uniform filling structure characteristic, the structural rigidity is improved, and meanwhile, the good heat dissipation performance is shown.

The invention discloses a dynamic compensation intelligent formwork real-time regulation and control method and system, and relates to the technical field of building intelligent control. According to the method, pulse signal sensing and cooperative compensation between nodes are realized by constructing a distributed neural unit network, and a three-level compensation mechanism is triggered when displacement or stress is detected to exceed a threshold value. A generative adversarial network is innovatively adopted to construct a virtual scene library to simulate extreme working conditions, a cross-scene migratable strategy library is generated through feature alignment, and intelligent strategy matching of a new construction site environment is realized. A full-structure rigidity field is dynamically generated based on an elastic mechanical model, a supporting arm rigidity switching path is optimized in combination with an ant colony algorithm, and directional dissipation of wind vibration energy is achieved through triangular rigid network construction. The system adopts a biological heuristic self-organizing algorithm to realize redundant network reconstruction when nodes fail, a supporting arm adopts a shape memory alloy and carbon fiber composite structure, and a micro strain sensor is integrated to realize directional release of corrosion stress. According to the method, the adaptive capacity of the formwork system under the complex working condition is effectively improved, and the structural failure rate is reduced through multi-modal compensation strategy fusion.

The invention relates to the technical field of bridge health monitoring, and discloses a method for judging rigidity change of a bridge structure based on bridge health monitoring deformation data. The method comprises the following steps: establishing an initial data set of bridge deformation monitoring data and performing multi-scale decomposition processing to generate deformation component data of different time scales; inputting the deformation component data of different time scales into a pattern recognition engine, and recognizing a characteristic pattern data stream associated with the structural rigidity; constructing a rigidity influence factor sequence based on the characteristic mode data flow, and calculating a statistical characteristic quantity of the rigidity influence factor sequence through a sliding time window; performing multi-dimensional matching analysis on the statistical characteristic quantity and a historical reference database, and outputting a stiffness anomaly probability index; and activating a hierarchical verification mechanism according to the stiffness anomaly probability index, and confirming a stiffness change trend through a cross validation algorithm. Reliable data support is provided for bridge structure health condition evaluation.

The invention relates to the technical field of mine safety, and provides a cross-layer roadway multi-rock-stratum rigidity matching collaborative segmented supporting method which comprises the steps that plastic zone ranges of different rock stratum areas in a cross-layer roadway are determined, and rock stratum joint fissure zones and weak intercalated layers are identified; monitoring the elastic zone rigidity and the plastic zone weakening rate of the surrounding rock, constructing a surrounding rock mechanical model, obtaining the supporting structure rigidity for inhibiting the expansion of the plastic zone through the surrounding rock mechanical model, and constructing a supporting structure according to the supporting rigidity; and the reinforcing material is sprayed to the surface of the surrounding rock through high-pressure jet flow to form a protective layer. Through the cooperative control thought of weak layer control, rigidity adjustment and resistance transfer, breakthrough transformation of crossing roadway support from passive defense to active control is achieved, according to a scientific surrounding rock mechanical model, the rigidity of the support structure can effectively inhibit expansion of a plastic zone, the stability of a system is maintained, and the stability of the system is improved. And finally, an ultrahigh strength performance and gradient spraying layer structure technology is adopted, so that the compression strength and the shear strength of the surrounding rock are remarkably improved.

The invention provides a bridge structure monitoring system and method combined with active early warning, and the method comprises the steps: obtaining dynamic stress data and static stress data of each bridge monitoring point in a bridge section, and constructing a plurality of fatigue stress spectrums according to the dynamic stress data of each bridge monitoring point; determining a damage accumulation coefficient of a bridge structure at each bridge monitoring point according to a stress distribution difference between the fatigue stress spectrums, and extracting a plurality of monitoring key points by combining all the damage accumulation coefficients with dead load characteristics of a bridge section; determining the rigidity of the bridge structure corresponding to each monitoring key point according to the static stress data of each monitoring key point, and determining a confidence interval for performing active early warning on the structural damage of the bridge section according to all the rigidity of the bridge structure; and performing structural damage early warning on the bridge section based on the confidence interval and the current bridge stress at each bridge monitoring point. Accurate early warning of bridge structure damage can be realized under the influence of multi-dimensional load response.

The invention discloses a high-rise shear wall structure anti-seismic effect evaluation method and system, and particularly relates to the technical field of high-rise shear walls. The method comprises the following steps: accurately collecting low-cycle fatigue parameters, constructing a concrete and steel bar degradation model considering a fatigue effect, applying the model to anti-seismic analysis of a shear wall structure, simulating the influence of main shock and multiple aftershock loading on structural performance, drawing a bearing capacity degradation curve according to multiple loading results, and analyzing a degradation speed abnormal state. The risk that the structural rigidity and the bearing capacity are abnormal is judged by combining the change of the residual rigidity and the bearing capacity, the risk is divided into high, medium and low levels, and proper reinforcement or prevention measures are provided for different risk levels, so that the defect that the material fatigue effect is not fully considered in the existing anti-seismic evaluation is effectively overcome, and the anti-seismic evaluation accuracy is improved. According to the method, the damage accumulation condition of the high-rise shear wall structure in frequent aftershocks can be predicted more accurately, so that the risk of premature failure of the structure is reduced, and the durability and safety of a building in an earthquake are improved.

The invention relates to the technical field of monitoring, in particular to a method and system for detecting and evaluating the corrosion risk of an offshore wind power steel structure. The method comprises the following steps: acquiring corrosion environment parameters and corrosion response parameters of a corrosion area in the offshore wind power steel structure; according to the corrosion environment parameters and the corrosion response parameters, the real-time corrosion rate of the corrosion area is determined; determining a local stress concentration factor of the corrosion area according to the three-dimensional scanning characteristics of corrosion deposits in the corrosion area; the dynamic pressure parameters of the marine environment serve as dynamic boundary conditions, the real-time corrosion rate and the local stress concentration factor serve as the basis, and the structural rigidity degradation amount of the steel structure in the corrosion area is determined through finite element iteration; according to the structural rigidity degradation amount, the structural safety coefficient of the steel structure in the corrosion area is determined; and determining the corrosion risk of the steel structure in the corrosion area according to the dynamic pressure fluctuation range of the marine environment and the structure safety coefficient of the steel structure in the corrosion area.

The invention discloses a space flexible mechanical arm rope cluster active and passive hybrid driving module and method.The space flexible mechanical arm rope cluster active and passive hybrid driving module comprises a rope cluster multi-axis driving module, the rope cluster multi-axis driving module comprises a plurality of rope cluster driving modules, each rope cluster driving module comprises a rope driving mechanism and a driving rope, one end of each driving rope is connected with the corresponding rope driving mechanism and is driven by the corresponding rope driving mechanism to linearly move, and the other end of each driving rope is driven by the corresponding rope driving mechanism; the other end of the driving rope is connected with a kinematic pair of any arm section in the arm section; and the segmented equal-curvature linkage module provides constraint for all the arm sections in the arm sections, the same-direction moving shafts of all the arm sections in the arm sections are coupled together through linkage ropes, and all the arm sections are driven to synchronously move at equal angles under the driving action of the rope cluster multi-shaft driving module. The problems that the motion state of the under-actuated flexible mechanical arm is not unique, and the number of driving units of the full-drive flexible mechanical arm is large are fundamentally solved, and the overall number, quality and power consumption of the driving units are greatly reduced while the motion flexibility, the tail end precision and the structural rigidity are guaranteed.

The invention discloses a wind vibration actual measurement analysis method for a large-span steel structure roof, and belongs to the field of steel structure engineering monitoring, and the actual measurement analysis method comprises the following specific steps: I, based on the geometric and dynamic characteristics of a large-span steel structure roof structure, optimizing the arrangement of each sensor, and constructing a multi-modal heterogeneous sensing network; iI, acquiring wind speed and wind direction time sequence data according to the multi-mode heterogeneous sensing network, establishing a reconstruction model of a non-stationary wind field, and predicting time-varying distribution of wind pressure on the surface of the structure; according to the method, high-fidelity dynamic reconstruction of the wind field is realized, the authenticity of wind load input is improved, the data quality and information diversity are improved, the prediction precision and timeliness of the wind pressure field are improved, and the scientificity and the monitoring effect of an overall layout strategy are enhanced; according to the method, the accuracy of long-term performance evaluation can be improved, environment coupling simulation of structural response is achieved, the dynamic adaptive capacity of analysis is enhanced, the structural rigidity evolution rule is depicted finely, and the robustness and local recognition capacity of the model under uncertain data are enhanced.

The invention discloses a composite material multi-dimensional variable-rigidity casing structure, and relates to the field of aero-engines. The cartridge receiver structure has the multi-dimensional variable stiffness characteristic of in-plane and out-plane variable stiffness; the in-plane rigidity is changed, the laying angle of the composite material fibers is changed in a continuous curve form, and when the continuous curve fibers are wound, the fibers have tension stress to provide prestress for the structure of a casing containing area; the out-of-plane variable stiffness is achieved, two or more materials are alternately laid to achieve stiffness change of the composite material in the thickness direction, the in-layer fiber laying angle is alternately changed, and the number of laid layers, the thickness of the laid layers and the density degree of the fibers can be adjusted to achieve the optimal mechanical property. According to the method, the variable stiffness characteristics of each region of the cartridge receiver structure are optimized according to numerical simulation and experimental test results, so that fine regulation and control of multi-dimensional variable stiffness and local strength are realized on the premise of ensuring the structural strength safety and the lightweight target; the problems that a traditional metal engine case structure is insufficient in rigidity strength and weight reduction space are solved.

The invention belongs to the field of computer aided design, and discloses a design method of a multistable metamaterial with an ideal energy absorption characteristic, which comprises the following steps of: firstly, carrying out theoretical analysis on a buckle to establish a mathematical model; then, according to the theoretical solution of the rigidity value of the buckle structure, reverse topological optimization design is carried out on the curved beam, so that a force displacement curve of the curved beam has negative rigidity and peak force corresponding to the buckle. The buckle structure and the optimized and customized curved beam are assembled through the functional part, and the multistable metamaterial unit cell with the ideal energy absorption characteristic can be obtained. And programming design is carried out on the unit cells, so that the required metamaterial can be constructed to meet the energy absorption requirement under the complex load. The technical scheme is widely applicable to the fields of aerospace, automobile industry, building protection and the like, and excessive rebound of impact energy is avoided while the impact resistance of equipment is improved.

The invention relates to a transformer vibration reduction method based on particle damping, which comprises the following steps of: finding out the maximum vibration deformation position of a transformer by using modal analysis, arranging a hole-shaped cavity on a radiating fin of the transformer, and filling particles in the hole-shaped cavity; the vibration reduction amplitude values corresponding to the multiple sets of design parameters are obtained through simulation, iteration is conducted on the design parameters by establishing a linear regression model, and the design parameters with the optimal vibration reduction effect are obtained on the premise that the structural rigidity is met; the hole-shaped cavities in the cooling fins extend from the sides, away from the transformer, of the cooling fins to the transformer, and the cooling effect of the cooling fins cannot be affected. A discrete element method and a finite element method are used for conducting simulation analysis on various particle dampers of different design sizes. And after a result is obtained, establishing a regression model by utilizing data obtained by simulation, optimizing parameters, and carrying out iterative simulation to obtain an optimal scheme.

The invention discloses an offshore single-pile structure foundation and a construction method thereof, the offshore single-pile structure foundation is composed of a main pile, a suction barrel assembly and a grouting sealing cover, the outer part of the main pile is annularly sleeved with the suction barrel assembly, and the top of the suction barrel assembly is provided with the grouting sealing cover. The structural form that the variable-diameter single pile and the multi-subdivision annular suction barrel are combined is adopted, the advantages of extremely high vertical bearing of the single pile and horizontal reinforcing supporting of the suction barrel are fully played, the horizontal swing load resisting capacity of the single pile on the mud surface section is effectively improved, and the horizontal swing load resisting capacity of the single pile on the mud surface section is effectively improved through horizontal reinforcing of the external suction barrel structure. Meanwhile, the structural rigidity is improved, the stability is improved, and long-term use is stable and reliable; the independent center supporting sleeve is arranged in the middle of the suction barrel assembly, so that when a single pile is scoured, the inner ring of the suction barrel can avoid a scouring pit, self-sinking sealing is achieved without being affected, the suction barrel can smoothly sink to the designed depth, and the bearing requirement is met.

The invention discloses an eccentric quasi-static loading device for the structural rigidity of an existing brick masonry and a testing method, and relates to the technical field of quasi-static loading testing of the brick masonry, the eccentric quasi-static loading device comprises a loading pedestal, a loading assembly is arranged above the loading pedestal, a load distribution assembly is arranged above the loading assembly, and the loading assembly is connected with the loading pedestal. The reaction walls are arranged at the two ends of the load distribution assembly and the two ends of the loading assembly, the loading assembly is connected with the reaction wall on one side, the portal is arranged between the reaction walls on the two sides, and the portal is connected with the load distribution assembly. By the adoption of the existing brick masonry structure rigidity eccentric pseudo-static loading device and the testing method, the authenticity of the load condition in the simulated wall pseudo-static test process in the test is guaranteed, the vertical load loading position is adjusted and refined, the load applying mode is optimized, the loading device is adjusted, and the test efficiency is improved. The influence of a vertical load on a horizontal dynamic load is reduced, and the overall precision of the test is improved.

The embodiment of the invention provides a three-degree-of-freedom waist structure and a humanoid robot, and relates to the technical field of humanoid robots. The three-degree-of-freedom waist structure of the humanoid robot comprises a first joint mounting piece and a second joint mounting piece. And a waist turnover joint is arranged in the first joint mounting piece. The output end of the waist turnover joint is connected with the robot lower limb structure. And the second joint mounting piece is rotationally connected with the first joint mounting piece. And a waist side-sway joint and a waist pitching joint are arranged in the second joint mounting piece. The waist side-sway joint and the waist pitching joint are sequentially arranged in the direction of the output shaft of the waist pitching joint. And the output end of the waist side sway joint is connected with the first joint mounting piece through a crank connecting rod mechanism. The output end of the waist pitching joint is connected with the robot chest structure. A full series connection mode can be adopted, the whole structure is compact, the structure is prevented from being bloated, good structural rigidity is achieved, kinematics calculation and control of the series connection structure are simple, and the motion control difficulty is reduced.

The present application discloses a method and device for modeling and topological optimization design of a reinforced flat plate with an embedded acoustic black hole. The method includes: dividing the design domain into units based on design variables to construct a collaborative optimization model; dividing the reinforced area with solid units and the flat plate area with variable thickness shell units to simulate acoustic black holes; coupling the variable thickness shell units with the solid units and determining the stiffness matrix; introducing maximum size constraints and / or geometric non-interference constraints and / or geometric-topological non-interference constraints and / or draft constraints in the design process; solving the sensitivity of the design variables based on the optimization target combined with the stiffness matrix to obtain the optimization result; if the optimization result does not meet the convergence condition, redefine the design variables based on the sensitivity. It solves the problem that the existing vibration reduction means are difficult to efficiently realize the lightweight vibration reduction design of thin-walled structures. It takes into account the structural stiffness and the vibration and noise reduction characteristics of the medium and high frequencies, realizes the structure-function integrated design, and reduces the dynamic response of the thin-walled structure.

The invention discloses a single-layer latticed shell structure damage identification method and system based on a direct analysis method, and the method comprises the steps: S1, constructing a numerical model according to the numerical value of a latticed shell structure, taking a key member of the latticed shell as a unit, analyzing and determining a distribution position, and preliminarily arranging a monitoring sensor measurement point for each unit; s2, updating a numerical model according to the monitoring data, performing construction analysis on each unit, determining deformation and residual construction stress, performing importance sorting on key components of the latticed shell again, and optimizing a measuring point arrangement scheme; s3, acquiring response data of each unit of the reticulated shell structure by using a monitoring sensor; s4, calculating unit unbalance force under the current reticulated shell configuration according to the response data, and calculating a structural stiffness matrix and a change matrix thereof; and S5, analyzing the change condition of the damage area by using the damage index and the structural stiffness matrix, and obtaining the damage condition of the reticulated shell key component. The structural member damage and the damage degree are accurately identified through the rigidity damage index.

The invention belongs to the technical field of tire engineering design, and discloses an engineering tire belted layer end structure finite element design analysis method and system. Comprising the steps of obtaining and preprocessing tire carcass contour data and initial belted layer parameters, conducting belted layer end parametric modeling on the basis of a standardized tire geometric model, constructing a durability finite element analysis model to obtain a stress-strain distribution field, conducting multi-parameter sensitivity analysis to determine a key influence factor weight matrix, and obtaining a stress-strain distribution field. And optimally designing a belted layer end structure based on the matrix, and finally performing durability verification and evaluation. According to the method, through accurate geometric expression, flexible parametric modeling, accurate performance analysis and multi-objective optimization design, belted layer end stress distribution uniformization and structural rigidity optimization are achieved.

The invention discloses a foundation pit excavation and support cooperative control method based on finite element dynamic feedback, which comprises the following steps: S1, establishing a foundation pit support finite element model, defining constitutive parameters of a soil body small strain hardened soil model HSS and support structure rigidity, and obtaining an initial displacement field and a stress field through step-by-step excavation simulation; and S2, iteratively calibrating parameters based on the simulation result and the field monitoring data, and constructing a construction stage dynamic adjustment threshold library which comprises a displacement warning value (UXmax), a stress safety coefficient (SF is greater than or equal to 1.3) and a support activation time sequence. According to the method, dynamic parameter iteration is achieved, a finite element model is reversely optimized through monitoring data, and the parameter solidification problem of a traditional method is solved; automatic closed-loop control is achieved, manual intervention is reduced, and the response speed is increased to the minute level; and economical efficiency is improved, waste of materials such as steel is reduced through accurate control, and the comprehensive cost is reduced by 15%-25%.

The invention belongs to the technical field of data processing, and particularly relates to a lithium battery homogenizing equipment state monitoring method and system.The method comprises the steps that a torque signal and an angular speed of a stirring shaft, a strain signal of a slurry tank wall and a slurry solid content set value are collected, and the effective viscosity of slurry and the equivalent rigidity of equipment are calculated; constructing a stirring system kinetic equation containing a fluid damping item and a structural rigidity item, decoupling to obtain a fluid resistance component and a mechanical resistance component, performing kernel smoothing regression modeling on standard working condition data under different operation stages and solid content conditions, and matching a corresponding model according to a current working condition to obtain a dynamic state of the stirring system; a mechanical resistance reference value is obtained by combining the real-time fluid resistance component, and a mechanical resistance residual error is calculated; by comparing the difference between the residual error and historical normal distribution, the health index of the equipment is determined, and graded monitoring and fault early warning of the homogenate equipment state are achieved. According to the invention, process fluctuation and mechanical abnormity can be effectively separated, and monitoring accuracy and reliability are improved.

The invention discloses a high-strength heat-insulation aerogel structure with a dual multi-scale design and a preparation method thereof, relates to the technical field of thermal protection of spacecrafts, and in particular relates to the high-strength heat-insulation aerogel structure with the dual multi-scale design and the preparation method thereof. The invention aims to solve the problems of insufficient structural rigidity and poorer thermal protection property and thermal stability of the traditional spacecraft surface aerogel structure under the conditions of extreme high temperature and mechanical load. The structure is composed of an upper carbon-carbon composite material plate, a lower carbon-carbon composite material plate, an alloy skeleton and a filler. The method comprises the following steps: 1, preparing a multi-scale C / C composite material; 2, designing and preparing a titanium alloy honeycomb framework; 3, proportioning the multi-scale aerogel; 4, in-mold in-situ gelation; 5, drying and heat treatment; and 6, assembling and solidifying. The porosity of the aerogel is 85-98%, the structure has high rigidity and thermal protection performance, and the aerogel is applied to the field of aerospace thermal protection.

The invention discloses a solid rocket engine bearing structure lightweight determination method based on a carbon fiber composite material, and relates to the technical field of composite material structure design, and the method comprises the steps: obtaining the structure size and geometric shape of a fixed body; replacing a titanium alloy material with a carbon fiber composite material, and determining a carbon fiber composite material structure response model based on a finite element modeling method; determining an optimal layering scheme based on structural response sensitivity analysis and a multi-objective optimization method; then determining a thickness optimization scheme based on the structural size and geometric shape of the fixed body and load distribution; determining a reinforcement optimization scheme based on a parametric modeling method; determining a metal reinforcement configuration by adopting a structural rigidity-quality collaborative evaluation method; and finally, determining a lightweight structure of the fixed body based on a composite material layering process design method. The mass of the fixing body structure can be reduced, the mechanical property of the fixing body structure is improved, and the high-performance design requirement of a solid rocket engine is met.

The invention provides a lightweight harmonic speed reducer, and relates to the technical field of speed reducers. A flexible gear is respectively connected with a wave generator and an inner structural body of a crossed roller bearing through an elastic meshing interface; an inner gear matched with the flexible gear in tooth shape is arranged on the inner side of the inner structure body. The invention has the beneficial effects that the internal gear and the crossed roller bearing are integrally designed, so that the number of assembly components is reduced, the volume of parts is reduced, the axial size is reduced, the structural rigidity is improved, the stress distribution of a transmission interface is more uniform, the service life is effectively prolonged, and the assembly difficulty is reduced; the crossed roller bearing is made of a polymer composite material, and the weight of the crossed roller bearing is reduced by 30-50% compared with that of a traditional metal material, so that the weight of the harmonic speed reducer can be greatly reduced, the burden of a driving motor is reduced, the service life of the driving motor is prolonged, the elasticity is increased due to the design of the axial hollow roller, and the precision error and the assembly error of parts can be absorbed; and a gap between the roller and the track is eliminated through elastic deformation, so that transmission without a back gap is achieved.

The invention discloses a rigidity-variable rigid-flexible coupling super-redundant continuum robot which comprises a head unit continuum, a middle unit continuum, a tail unit continuum and a driving line. The head unit continuum comprises a head body section and a plurality of structural body sections which are connected in sequence, and the upper surface of the head body section is a plane and used for being connected with an end effector; the middle unit continuum is connected with the head unit continuum, and the middle unit continuum comprises a plurality of structural body sections which are connected in sequence; the tail unit continuum is connected with the middle unit continuum and comprises a tail body section and a plurality of structural body sections which are connected in sequence, and the lower surface of the tail body section is a plane and is used for being fixed to a working platform or a base; a plurality of driving wires penetrate through the tail body section and the structural body section to be connected with the head body section and are used for transmitting driving force to the head body section, the structural body section and the tail body section. The problems that due to insufficient tension of a driving line of a traditional continuum robot, the structural stability is poor, and the structural rigidity cannot be actively adjusted are solved.

The invention relates to a self-adaptive force output and energy consumption bridge vibration and vibration control inerter tuning device, and belongs to the technical field of vibration control. Comprising a roll shaft support, a spring rod, a main inerter element, a box chamber main body, a secondary inertia flywheel, a flow guide pipe, a transmission connecting rod and a flow baffle, the main inerter element penetrates through and is arranged in the box chamber main body, the outer end of the main inerter element is connected with the spring rod, the spring rod is connected with the roll shaft support, and the roll shaft support is respectively fixed with the bottom surface of a main beam and the top of a bridge pier; in addition, the flow guide pipe is arranged in the box chamber body, a flow baffle and a transmission connecting rod are further arranged in the flow guide pipe, and the transmission connecting rod is further connected with a secondary inertia flywheel. The damping device is achieved through a hydraulic mechanism, and the damping device with the self-adaptive inerter coefficient is formed through linkage of the inerter devices in the main box chamber and the auxiliary box chamber, so that the purposes of changing the inerter coefficient in real time and damping are achieved. The shock resistance, the transmission efficiency, the energy consumption effect, the structural rigidity and the stability of a vibration reduction system can be improved.

The invention discloses a three-fulcrum engine compact type main load-bearing structure rigidity design method and application, and the method comprises the steps: firstly, carrying out the iterative optimization design of the determined rotor structure fulcrum rigidity, and determining the rigidity of each fulcrum; secondly, the static strength of the initial stator assembly and the stiffness of each fulcrum are analyzed, if the static strength and fulcrum stiffness requirements are not met, the stator assembly is optimized, and a stator assembly structure determined for the first time is obtained after optimization is completed; then, the coaxiality of all supporting points of the stator assembly determined for the first time is analyzed, if the requirement is not met, the main bearing structure is optimized, and a stator assembly structure determined again is obtained after optimization; finally, static strength and fulcrum rigidity analysis is conducted on the stator assembly determined again, if the requirements are met, the final stator assembly structure is obtained, and if not, iterative optimization is conducted. The vibration performance and the structural reliability of the whole machine can be remarkably improved, and the method is suitable for engineering design of aero-engines, gas turbines and the like.

The invention provides a dynamic risk assessment method and device for a steel cofferdam construction period based on digital twinning. The method comprises the steps that actual values of all monitoring points corresponding to all evaluation indexes in an initial state and a current state are collected by applying a real-time dynamic monitoring and collecting system based on a constructed dynamic risk assessment index system; a steel cofferdam digital twinborn model is combined with finite element calculation to obtain theoretical values of all monitoring points in the initial state and the current state; calculating an actual change value and a theoretical change value of each monitoring point; according to the actual change value and the theoretical change value, the alarm value of each evaluation index and the predicted stress of the component under the most unfavorable working condition are determined, risk assessment is conducted, and the actual value of any evaluation index is the sum of the actual value of the corresponding monitoring point in the current state and the theoretical value of the corresponding monitoring point in the initial state. A digital twin system is combined with field measured data to accurately evaluate the current risk level, so that the structural rigidity is adjusted in time or water return in the weir is carried out in advance, and the structural safety is ensured.

The invention relates to the technical field of carbon fiber design, and discloses a carbon fiber composite material lightweight design method and system.The method comprises the steps that a lightweight design scheme of a carbon fiber composite material is generated based on the real-time environment of the carbon fiber composite material in combination with a carbon fiber distribution cloud atlas, determining a layering design domain of the carbon fiber composite material according to the lightweight design scheme, obtaining a main bearing direction of the layering design domain, matching a rigidity response corresponding to an angle in the layering design domain, obtaining a corresponding rigidity value of the layering design domain, and obtaining a corresponding rigidity value of the layering design domain; the deviation of the corresponding rigidity value is corrected on the basis of the main bearing direction, and the corrected corresponding rigidity value serves as the mapping relation between the laying layer angle and the structural rigidity in the carbon fiber composite material. The prior art generally has the problem of poor adaptability between a layering scheme and an actual working condition.