80 results about "Rigidity matrix" patented technology

The invention discloses a hydrodynamic analysis method for a floating structure with multi-body and multi-coupling characteristics, which comprises the following steps of: acquiring geometric characteristics of each floating body, and dividing boundary element computational grids; wave excitation force, additional mass and radiation damping of each floating body are calculated, and a mass matrix and a rigidity matrix of each floating body are obtained; determining a connection mode and a coupling factor of the floating body; according to a connection mode and coupling characteristics of the system, establishing displacement connection conditions among the floating bodies; constructing a motion constraint matrix according to the displacement continuity condition and the motion constraint relation; determining a frequency domain motion equation of the multi-floating-body system according to a Lagrange multiplier method; and solving the motion equation to obtain the motion response of the multi-floating-body system, and further systematically analyzing the wave energy capture power according to the coupling characteristics of the system. According to the analysis method, the problem that the motion response of each degree of freedom cannot be accurately described when the hydrodynamic response characteristics of the complex multi-body system are obtained through an existing simulation method is solved.

The invention discloses a thin-wall structure topological optimization design method, device and system, and a storage medium. The method comprises the following steps: calculating any unit density in a design domain according to a structure topological optimization model; calculating a displacement vector according to the density of any unit in the design domain, the total stiffness matrix and the external load vector; calculating the structural flexibility according to the element stiffness matrix and the displacement vector; according to the unit density and the structural flexibility, obtaining the sensitivity of the target function and the constraint function to design variables; establishing a topological optimization model by taking the minimum structural flexibility as a target function, taking the welding spot area as a constraint condition and taking a design variable as a normalized height; and according to the sensitivity of the target function and the constraint function to the design variables and the topological optimization model, performing updating iteration on the design variables by utilizing an MMA algorithm to obtain an optimized structure. By the adoption of the technical scheme, on the premise that the technological constraint of the superplastic forming technology is met, the structure with the excellent mechanical property is obtained.

The invention discloses a welding thermal stress simulation method, device, equipment and medium based on a crystal plasticity finite element, and relates to the technical field of welding thermal stress finite element simulation. The method comprises the steps that a sample is prepared according to a specific multi-phase metal material, and phase distribution and crystal orientation information of a two-dimensional plane of the material are obtained through a metallographic experiment; and a three-dimensional multi-grain model is constructed based on the two-dimensional information. According to the method, a crystal plastic constitutive model is adopted to describe the flowing behavior of the material at high temperature, crystal slippage and polycrystal interaction are considered, the influence on the material performance is reflected from the microstructure evolution level, and the problem that the influence on the macroscopic mechanical performance of a microstructure is difficult to capture in welding multiphase metal material simulation is solved; two-dimensional representation is obtained through a metallographic experiment, the Young modulus and rigidity matrix parameters are accurately calculated by combining forward stretching and shear simulation, the rigidity matrix precision is improved, a temperature field area is divided, stress evolution and residual stress are calculated by combining a thermal-elastic-plastic model, and the welding thermal stress calculation precision is improved.

The invention discloses a cross-domain coupling control method for an air suspension and an active stabilizer bar. The cross-domain coupling control method comprises the steps that a signal input layer collects and fuses data and transmits the data to a decision-making layer; the decision-making layer forms a control instruction based on a model predictive control algorithm, and comprises the steps of constructing an automobile three-degree-of-freedom coupling dynamic model, and iteratively solving a cost function minimum value in a rolling time domain to obtain the control instruction; the three-degree-of-freedom coupling dynamic model quantifies multi-dimensional motion association through a stiffness matrix off-diagonal term, can accurately predict the cross influence of air pressure adjustment of the air suspension on the roll motion, and provides a nonlinear prediction basis for model prediction control. According to the invention, by cooperating with the multi-dimensional dynamic signal and the dynamic arbitration control logic, the complex composite working condition is adapted, and the cooperative optimization of the vertical comfort, the roll stability and the pitching dynamic characteristic of the vehicle is realized.

The invention discloses a viscoelastic boundary verification method, device and equipment based on isoparametric elements and a medium, and the method comprises the steps: building a three-dimensional geometric model of a target structure according to geometric dimensions and material attributes, discretizing the three-dimensional geometric model into initial three-dimensional subunits, and then building an initial finite element mesh model; after identifying a target boundary surface to be applied with an artificial viscoelastic boundary, assigning boundary parameters to obtain each three-dimensional subunit and form a finite element model; all the three-dimensional subunits are mapped to a standard unit through equal-parameter coordinate transformation, an equivalent stiffness coefficient matrix and an equivalent damping coefficient matrix are obtained through calculation and then stacked and assembled, and an overall stiffness matrix and an overall damping matrix are formed; and calculating displacement response data based on the overall stiffness matrix and the overall damping matrix. According to the embodiment of the invention, by introducing the isoparametric coordinate transformation, the irregular boundary form can be directly processed without introducing an additional boundary unit, and the calculation requirement of an actual complex engineering model is met.

The invention provides a thermal elastic structure joint topological optimization method based on MATLAB and ABAQUS, and belongs to the technical field of thermal elastic structure optimization design. Firstly, finite element models of mechanical loads and thermal loads are established in ABAQUS, and files are exported; then calling an ABAQUS operation model in MATLAB, extracting core data such as nodes, units and a stiffness matrix, and constructing a parameterized thermodynamic finite element model based on an SIMP method; calculating a function value and sensitivity by taking volume minimization as a target and taking global stress and temperature constraint as conditions; and finally, iteratively optimizing the design variables by adopting a moving asymptote algorithm, and obtaining a final topological configuration through a filtering method. Through deep cooperation of MATLAB and ABAQUS, core finite element data of commercial software is extracted at a time for optimization iteration, repeated data generation and interaction are avoided, the calculation efficiency is greatly improved, and an efficient solution is provided for processing the topological optimization problem of stress and temperature constraints under complex heat-force loads.

The invention relates to the technical field of nuclear reactor fuel element analysis, in particular to an irradiated zirconium alloy plasticity limit prediction method based on a crystal plasticity finite element, which comprises the following steps: establishing a three-dimensional polycrystalline representative body cell model conforming to the actual grain size of zirconium alloy; based on a crystal plasticity theoretical model, zirconium alloy material parameters are obtained through calculation; boundary conditions and load conditions are determined, finite element calculation is executed in combination with material parameters, and an element stiffness matrix of each increment step is output; assembling the unit stiffness matrix, and obtaining a macroscopic stress-strain matrix of the three-dimensional polycrystal cell model through a homogenization method; and substituting the macroscopic stress-strain matrix into the Rice theoretical criterion, traversing the macroscopic stress-strain matrix of each increment step, and determining the plastic strain meeting the judgment critical condition. According to the method, accurate finite element plastic limit analysis can be carried out on the irradiation material, and the plastic limit strain of the zirconium alloy under the irradiation condition can be accurately judged.

The invention discloses a wing structure multi-level modeling method, device, equipment and medium, and relates to the field of structure modeling simulation and wing structure analysis, and the method comprises the steps: decomposing a target wing into a 0-level simplified beam model, a 1-level unit cell model and a 2-level sub-model; performing order reduction analysis on the 1-level unit cell model, constructing an equivalent section attribute matrix, and establishing a wing simplified model matched with the beam element finite element stiffness matrix; building a sub-model simulation database based on multi-working-condition simulation, applying a generalized load and a typical external load, and obtaining displacement field data under each working condition; according to the displacement field data, extracting a displacement field boundary condition and a POD coefficient of the stress field data, and constructing a data driving sub-model; and performing multi-level model analysis on the target wing according to the wing simplified model and the data driving sub-model. The mechanical property and response of the wing structure under different working conditions can be efficiently and accurately simulated and analyzed.

The invention discloses a circumferential contour prediction method based on cutting force and deformation field space-time correlation, and relates to the field of aerospace, and the method comprises the following steps: 1, carrying out the spatial discretization of a circumferential contour region of a target workpiece; step 2, establishing a lightweight structure stiffness matrix; 3, constructing an elastic mechanism model and solving delta-F mapping; 4, introducing the time sequence correlation of the cutting load into the elastic mechanism model; step 5, constructing a Boolean relationship between the tool path and the workpiece envelope; step 6, fusing actual measurement process signals, and performing state correction; step 7, iterating the elastic model again by using the corrected load; and step 8, reconstructing full-field deformation based on spatial correlation. According to the method, online prediction of the station-level circumferential deformation field is achieved, the method can be used in the multi-procedure machining process, deformation in-situ compensation of the procedure is achieved, a clamping positioning strategy of the next procedure is output, and the manufacturing quality and the production efficiency are improved.

The application discloses a kind of deformation stress increment acquisition method and system of extremely thin layered soft surrounding rock;It is related to the technical field of tunnel engineering;The strain increment matrix of extremely thin layered soft surrounding rock under overall coordinate system is obtained, and under the elastic assumption theory, the stress tensor matrix of extremely thin layered soft surrounding rock under overall coordinate system is calculated by combining rotation matrix and element stiffness matrix, and the deformation stress increment is calculated according to the stress tensor matrix after characteristic correction;The method is improved on the basis of traditional extremely thin layered surrounding rock mechanics characteristic simulation technology, and under the elastic assumption theory, the stress increment matrix of extremely thin layered soft surrounding rock under overall coordinate system is calculated based on strain increment matrix, rotation matrix and element stiffness matrix;The deformation stress increment is calculated after the characteristic correction of stress increment matrix, and the stress deformation characteristics of extremely thin layered soft surrounding rock are accurately and reasonably described, and the efficiency of extremely thin layered soft surrounding rock engineering analysis is improved.

The invention provides a temperature-stress-based welding finite element rapid stiffness matrix assembly solving method, and relates to the technical field of welding process finite element simulation, and the method optimizes a stiffness matrix updating strategy through double variables of temperature and stress based on local heat input characteristics of a welding process. In the elastic area, the calculation strategy is flexibly adjusted according to the temperature change amplitude, and in the plastic area, iterative correction is carried out aiming at the nonlinear behavior of the material. By intelligently identifying the key area and avoiding unnecessary global updating, the algorithm greatly reduces the calculation amount and significantly improves the simulation speed. Besides, in combination with a sequential solution method of thermal-mechanical coupling, the algorithm can provide rapid and accurate stress solution for a complex welding process on the premise of ensuring precision, and is particularly suitable for efficient simulation analysis of large weldments. The problem that in the welding process of large weldments, the rigidity matrix assembling efficiency is low is solved.

The invention relates to the technical field of noise prediction, in particular to a vibration noise correction method and device based on a structural rigid body mode. The method comprises the following steps: constructing a primary function of elastic displacement to form a first vibration mode matrix, and introducing a rigid body mode into the first vibration mode matrix to form a second vibration mode matrix; and obtaining a structural modal mass matrix, a modal stiffness matrix and a modal force by using the second vibration mode matrix, and deducing a modal participation coefficient and a modal frequency. Performing a simulation test in combination with the deduced modal parameter coefficient and the complete vibration mode matrix to obtain vibration responses of the structure under different frequencies, and predicting the structure according to the vibration responses to obtain simulation data; and dynamically correcting the modal matrix according to the difference between the actual test data and the simulation data of the structure. By introducing the degree of freedom of rigid body motion, the displacement function of the structure can more accurately describe the actual behavior of the structure, so that a more accurate basis is provided for simulating the actual vibration behavior.

The invention relates to an engineering algorithm for predicting post-buckling load of a composite stiffened wallboard, and belongs to the field of composite engineering algorithm calculation. The method comprises the steps of constructing a stiffness matrix of the composite laminated plate, providing a skin local buckling correction engineering algorithm of the composite stiffened wall plate, and providing a post-buckling calculation method of the composite stiffened wall plate based on a skin correction buckling load, and specifically, through constructing the stiffness matrix of the composite laminated plate and through the corrected engineering algorithm, the post-buckling calculation method of the composite stiffened wall plate based on the skin correction buckling load is provided. According to the method, accurate prediction of the post-buckling load performance of the composite material stiffened wall plate is realized, rapid and accurate prediction of the composite material stiffened wall plate under a complex configuration can be realized, and the deficiency of the post-buckling load performance of the traditional stiffened wall plate in prediction accuracy can be made up; and theoretical support is provided for design optimization and engineering application of the composite stiffened wall plate.

The invention belongs to the field of mechanical simulation analysis of composite material structural parts, and particularly discloses an equivalent mechanical modeling method of a variable-thickness composite material component, which comprises the following steps: acquiring a laying deformation measure, and determining deformation distribution of fiber cloth by using the laying deformation measure through a fishing net method; mapping the deformation distribution of the fiber cloth to a target structure grid by using a grid mapping method; constructing a numerical model of equivalent mechanical characteristics of the target structure grid by using a multilayer structure equivalent calculation formula; the equivalent mechanical characteristics comprise equivalent density, an equivalent stiffness matrix and an equivalent damping matrix; and determining a numerical value implementation program of the numerical value model, and performing equivalent mechanical analysis simulation on the variable-thickness composite material component by the numerical value model through the numerical value implementation program by adopting a finite element method. According to the method, the modeling accuracy of the variable-thickness composite material component is improved.

The invention discloses a coaxial electric drive axle gear microscopic modification analysis method based on MASTA and Abaqus, and belongs to the technical field of electric vehicle transmission. The method comprises the following steps: firstly, building an electric drive axle transmission model in the MASTA; secondly, creating power substructure models of key components such as a differential case, a bull gear spoke and an axle housing in Abaqus, and importing the power substructure models into MASTA to construct a high-precision flexible system model; then, a gear finite element model is generated in the MASTA, and a condensation stiffness matrix of the gear finite element model is calculated; thirdly, calculating initial gear dislocation quantity under different working conditions by utilizing advanced loading tooth surface analysis; and finally, performing targeted tooth direction and tooth shape microcosmic modification on the gear according to the dislocation quantity, and verifying whether the transmission error and the tooth surface pressure of the gear meet the design standard or not. Through deep fusion of MASTA and Abaqus, balance of precision and efficiency in system-level simulation is realized, a scientific basis is provided for gear modification, and NVH performance and reliability of the electric drive axle are remarkably improved.

The invention discloses a high-formwork multi-parameter real-time automatic monitoring system and an application method, and relates to the technical field of monitoring analysis, and the high-formwork multi-parameter real-time automatic monitoring system comprises a data stream receiving unit, a stiffness matrix determination unit, a function construction unit, a model calibration unit, a full field set setting unit, an abnormal region determination unit, a root cause analysis unit and an intervention measure output unit. Through multi-source data fusion and physical intelligence, technical optimization of high-formwork safety monitoring from passive alarm to active prevention and control is achieved, multi-source heterogeneous data such as sensors, construction and environments are aligned through precise space-time synchronization, a unified data stream is formed, meanwhile, sparse actual measurement data are utilized, and the safety of the high-formwork is improved. According to the method, parameters of a finite element digital twinborn model are dynamically calibrated, a high-fidelity model synchronous with a real structural mechanical state is generated, forward simulation is performed on the basis of the model, a complete stress field and a force flow path of an area without a sensor are perspective, and jump from point monitoring to field cognition is realized.

The application discloses a kind of prediction methods of building three-dimensional vibration response, comprising the following steps: step one, the dynamic stiffness matrix of the column, beam, floor and shear wall four components in the frame-shear wall structure of building is obtained, according to spatial geometric coordinate relationship is assembled, obtains the dynamic stiffness matrix [D] of building G ;Step two, according to external force load vector [F] G And the dynamic stiffness matrix [D] G Of building, the displacement response vector [X] G Of building is obtained;Step three, according to the displacement response vector [X] G Of building obtained, according to building displacement response, the strategy of installing damping support in the bottom of building is used to carry out damping. According to the technical scheme provided by the application, the strategy of installing damping support in the bottom of building can be used to carry out damping according to building displacement response.

The present invention discloses a method for evaluating the spatial posture of a conceptual configuration of a branched-chain driven parallel robot. First, a kinematic analysis method based on singular values ​​is used to judge the reachability of all the terminal postures of the branched-chain driven parallel mechanism, and the terminal posture of the branched-chain driven parallel mechanism in the reachable workspace is obtained; then, based on the screw theory and the principle of virtual work, the complete Jacobian matrix and the full stiffness matrix of the mechanism are obtained, and the stiffness performance parameters of all the terminal postures of the branched-chain driven parallel mechanism are calculated, and the stiffness performance parameters corresponding to the terminal postures of all the mechanisms are obtained; finally, according to the terminal posture in the reachable workspace, combined with the stiffness performance parameters corresponding to the terminal postures of all the mechanisms, the optimal posture set is screened and obtained. The present invention can not only quantitatively evaluate the optimal posture set, but also realize the innovative mechanism concept design that meets the needs by comparing the optimal posture sets of mechanisms with different configurations.

The application provides a composite cracking path calculation method based on a matrix-free pixel finite element, in which pixels of a composite image are fine meshes of finite elements, and different pixel gray values represent different material components. After coarse-grained of the fine meshes, coarse meshes are formed, the boundaries of the material components are embedded into the interior of the coarse meshes to form embedded boundary elements. The stiffness matrix of the coarse mesh elements is calculated through Gaussian integration, and the overall stiffness is not assembled. The conditional conjugate gradient algorithm is used to solve the node displacement of the coarse mesh. Based on the node displacement of the coarse mesh, the node displacement of the fine mesh is obtained through interpolation, and then the stress of the fine mesh element is obtained. The maximum tensile stress criterion is used as the element failure criterion. After the element is damaged, the element area is regarded as a crack, and corresponding material elements are added to the image boundary to maintain the conservation of mass. The calculation method of the application occupies very little computer memory and greatly reduces the demand for hardware resources for cracking calculation.

The invention discloses a modal shape and frequency identification method for a motor stator system with an inner gear ring, and the method comprises the steps: building a shell unit and beam unit mixed analysis model of the motor stator system provided with the inner gear ring, and obtaining a total stiffness matrix and a total mass matrix under a local rectangular coordinate system through a matrix displacement method, obtaining a structural stiffness matrix and a structural mass matrix under the overall cylindrical coordinate system by using coordinate transformation; and establishing a discrete free vibration model, inputting the structural stiffness matrix and the structural mass matrix into the model, and outputting modal shapes of different orders and corresponding inherent frequencies of the motor stator system, thereby completing identification. The method comprehensively considers the influence of the stator teeth and the tooth part of the inner gear ring, helps to rapidly identify the modal shape and inherent frequency of the stator system, provides guidance for subsequent vibration acquisition and optimization, and has the advantages of simple modeling, rapid identification and high precision.

This invention relates to the field of electronic digital data processing technology, specifically to computer-aided engineering calculation and numerical simulation data processing technology. This invention discloses a design method for determining the maximum hanging weight of an ultra-thin lifting beam. In incremental iterative solutions, the equivalent stress gradient and strain energy density are extracted in real time to calculate local instability characteristic values. When the rate of change of element strain energy density exceeds a threshold, a mesh reconstruction mechanism is triggered. The nodal displacement field and stress field are extracted as initial boundary conditions. The coarse mesh is split into a fine mesh, and the coordinates of newly added nodes are smoothly interpolated based on the minimum potential energy principle. The local and global mesh degrees of freedom are coupled and assembled to continue nonlinear buckling analysis iterations until the load-displacement curve shows an extreme point. The corresponding load is then extracted as the maximum hanging weight. This invention avoids stiffness matrix singularities and computational divergence caused by distortion of the fixed mesh in local instability regions, ensuring the computational convergence of determining the maximum hanging weight.

This invention relates to a method, device, and medium for displaying mechanical information for risk warning during impacted tooth extraction. The method includes: Step S1: Obtaining the three-dimensional modeling results of each tissue unit; Step S2: Obtaining the modeling results of each tooth segment unit; Step S3: Constructing the tooth segment and its contact constraints with surrounding tissues; Step S4: Based on the constructed contact constraints, combined with the overall finite element stiffness matrix and operational load, solving for the displacement response of each finite element mesh; Step S5: Based on the displacement response of each finite element mesh and the shape function, obtaining the displacement matrix of each element, and further obtaining the strain tensor of each element; Step S6: Based on the constitutive matrix of the tissue material corresponding to each element and the strain tensor, obtaining the stress tensor of each element; Step S7: Comparing the stress tensor of each element with its pre-configured threshold and assigning color values ​​to the finite element mesh of each element. Compared with the prior art, this invention has the advantages of real-time performance and high accuracy.

The invention relates to the technical field of railway vehicle modeling, and provides an equivalent modeling method and system for a railway vehicle body composite laminated plate, and the method comprises the steps: building an equivalent mechanical model in a sub-layer through recognizing the periodic arrangement rule of a carbon fiber and glass fiber single-layer plate, the stress-strain relation and the volume thickness parameter, and carrying out the modeling of the composite laminated plate. And analyzing the layering periodic characteristics of the composite material laminated plate, and combining repeated single layers into sub-layer units so as to simplify the complexity of the model. Then, based on a material constitutive relation and a strain energy conservation principle, deducing stiffness matrixes in a local coordinate system and a global coordinate system respectively, and obtaining the equivalent stiffness of the sublayers through coordinate transformation and volume fraction integration; and finally, converting the flexibility matrix obtained by inversion into a three-dimensional elastic constant, and directly applying the three-dimensional elastic constant to a material module of finite element software for finite element analysis.

The application discloses a kind of multi-agent preset time formation control methods based on backstepping method under distance rigidity matrix, comprising: 1) based on the double integrator dynamics model of multi-agent system is established based on rigidity graph theory, define the minimum and infinitesimal rigidity frame corresponding to the expected formation;2) introduce backstepping design framework, define virtual speed error variable;3) introduce time-varying scaling function to construct time scale transformation;4) design distributed preset time controller;5) through numerical simulation and physical platform are verified, verify the effectiveness of distance error in user preset time under different initial conditions converges to the vicinity of zero.The application is fused by backstepping and preset time scaling function, for the first time in only local relative measurement distance rigidity formation Convergence time user self-defined preset is realized, and convergence time upper bound is independent of initial condition and controller parameter, provides reliable, engineering implementation solution for time-critical multi-agent cooperative task.

The application discloses a wafer positioning-based rotary base monitoring method and device and a medium, relates to the technical field of semiconductor preparation, and comprises the following steps: acquiring real-time pressure data of a multi-axis piezoelectric sensor, performing finite element analysis of the real-time pressure data through a stiffness matrix, and obtaining rotary base clamp root stress data; based on preset rotary base clamp jaw deformation parameters, real-time deformation variable inversion is performed to determine rotary base clamp jaw body stress data; the rotary base clamp stress data and the jaw body stress data are time-synchronously processed to obtain rotary base real-time stress parameters; the rotary base real-time stress parameters are subjected to abnormal threshold determination to determine a rotary base abnormal state; the rotary base abnormal state is uploaded to a preset closed-loop controller, and an abnormal rotary base alarm signal is sent through the closed-loop controller. The application solves the technical problem of preparation precision reduction of a wafer in a wet preparation process.

The application provides a contact problem simulation method based on a virtual unit method, which comprises: (1) mesh generation, (1.1) data extraction and mesh construction; (1.2) boundary information extraction; (2) material definition: for different materials, material attribute parameters are given, a constitutive model of the material is defined, and material attribute information of a contact body is provided for subsequent iterative solving; (3) contact search, (3.1) global contact detection; (3.2) local contact detection and non-matching mesh processing; (3.3) contact constraint construction and friction parameter setting; (4) boundary condition application, (4.1) displacement constraint setting; (4.2) stress boundary setting; (5) iterative solving, (5.1) stiffness matrix assembly and residual calculation; (5.2) nonlinear solving strategy; (6) post-processing, (6.1) data extraction and result export; (6.2) visualization processing. The application has reasonable concept, high mesh adaptability, low algorithm complexity, and can realize unified solving of multiple models.

The invention belongs to the technical field of wallboard part assembly deviation analysis, and discloses a composite wallboard part assembly deviation calculation method considering interference connection, and the method comprises the steps: obtaining the initial manufacturing deviation of a part A and a part B, and extracting a super-element stiffness matrix of the parts and an assembly; deterministic positioning and clamping are conducted on the part, and clamping force is calculated; interference connection force is applied for connection, contact calculation is carried out at the assembly connection point, and the interference connection force and contact force are dynamically corrected in an iteration mode until the assembly connection surface reaches contact balance and is located at an ideal position; releasing the constraint of the assembly connecting point and the over-constraint positioning point, and calculating the rebound deformation of the assembly body caused by the corrected acting force; and the initial manufacturing deviation and the springback deformation are synthesized, and the final assembly deviation is calculated. According to the method, the influence of interference connection and contact nonlinearity is considered, and the accuracy of assembly deviation prediction is improved.

The invention discloses a construction method of an efficient dynamic time-history calculation model of a large-scale structure based on equivalent boundary recognition. The construction method comprises the following steps: step 1, establishing a finite element model of the structure; 2, extracting a stiffness matrix, a damping matrix and a mass matrix of the finite element model; 3, assuming a structure equivalent boundary condition and a polynomial coefficient according to the boundary shape of the structure model; 4, obtaining a corrected polynomial coefficient; 5, calculating a diagonal vector curve and a secondary diagonal vector curve according to the polynomial coefficient; step 6, the diagonal vectors are recombined into rigidity, damping and mass matrixes of equivalent boundary conditions; and step 7, generating an efficient calculation model. According to the method, small and medium seismic response data accumulated during operation of a large structure is utilized, a high-precision equivalent boundary condition recognition algorithm is established, and an optimized equivalent boundary condition is adopted to replace a huge foundation degree of freedom in a traditional model, so that a novel calculation model with both calculation efficiency and precision is constructed.

The invention provides a warping simulation method and device of a packaging structure and electronic equipment, and relates to the technical field of packaging, and the method comprises the steps: obtaining material characteristic parameters and technological parameters of the packaging structure; determining a target time point set based on the process parameters; based on the target time point set, determining a packaging structure model corresponding to each time point; determining a target stiffness matrix, a target thermal internal force and a target thermal bending moment of the packaging structure model corresponding to the current temperature according to the material characteristic parameters; obtaining a birth state of each activation layer in the packaging structure model corresponding to the current time point, and determining a birth additional load of the packaging structure model according to the birth state; and determining a target warping value of the packaging structure model corresponding to the current temperature according to the target stiffness matrix, the target thermal internal force, the target thermal bending moment and the birth additional load, so that the warping conditions of the packaging structure in different process stages can be accurately simulated, and the accuracy and reliability of warping simulation are improved.

This invention relates to the field of building structure optimization design technology, and discloses a method for energy-saving optimization design of prefabricated tower buildings. The method establishes a discrete feature database containing component cross-sections and semi-rigid node parameters; performs topology reduction analysis, eliminating redundant elements based on sensitivity coefficients and verifying connectivity to generate a skeleton model; performs stiffness and internal force co-calculation, constructing a semi-rigid element stiffness matrix using modified shape function coefficients, and bi-directionally matching component cross-sections and node stiffness according to the dominant internal force mode of the components; calculates the structural assembly entropy, constructs an objective function containing the total structural mass and assembly entropy, and uses simulated annealing algorithm for iterative optimization; finally, based on the optimization results, it outputs a bill of materials and a three-dimensional building information model containing detailed node construction parameters. This invention achieves simultaneous optimization of structural lightweighting and component standardization through the coordinated adjustment of node stiffness and component cross-sections and assembly entropy constraints.