238 results about "Elastic plastic" patented technology

The invention relates to the technical field of computer-aided engineering, in particular to a nonlinear efficient iterative solving method for thermal strain load, which is used for solving an obtained finite element equation by using a modified Newton-Raphson method and comprises the following steps of: firstly, establishing a geometric model to be analyzed and performing grid division; the method comprises the following steps: firstly, setting a model to be analyzed, then setting boundary conditions and temperature field change conditions of the model to be analyzed, finally, inputting the conditions into an algorithm solver, solving a nonlinear equation set, iteratively inputting a load continuously according to a modified Newton-Raphson method in the solving process, calculating node displacement until convergence, and solving stress-strain conditions in the welding process according to a material constitutive relation. In the solving process, by judging the size of the two norms of the displacement increment obtained in the adjacent increment step heuristic stage, the convergence of nonlinear solving of the structure is enhanced through the calculation mode, and the solving speed of the nonlinear problem in the thermal elastic-plastic constitutive structure is increased.

The invention relates to the technical field of structural design and strength evaluation of nuclear fusion devices, and discloses an elastic-plastic analysis and strength verification method, device and equipment under multiple working conditions and a medium. Firstly, basic parameters, unit partitions and conditional constraints of a target structure are obtained; next, based on basic parameters, unit partitions and conditional constraints, static nonlinear solution is carried out, a target data set and a load-displacement curve are obtained, different stress stages are abstracted into a continuous gravity loading path, the strength and deformation of multiple working conditions are synchronously evaluated through a set of elastic-plastic analysis process, and the dynamic performance of the gravity loading path is improved. The method is not limited to linear elasticity checking calculation of a single working condition any more, and the actual stress state of the structure is reflected more truly. Then, an allowable gravity amplification factor is determined based on the load-displacement curve. Further, a safety strength elastoplasticity result and a high-risk region are determined based on an allowable gravity amplification coefficient, a target data set, and a load-displacement curve. And finally, based on the high-risk area and a preset reinforcement rule, obtaining a reinforcement scheme.

The invention discloses an integrated fan pneumatic-hydrodynamic-servo-elastic-plastic coupling analysis system and method, and belongs to the technical field of offshore fan numerical simulation calculation. According to the method, a coupling model of an offshore wind turbine under the environment load effect is established, a rotor cabin assembly is simulated through a multi-body dynamics method, and interaction of a supporting structure and pile soil is simulated through a finite element method. By introducing a prediction correction loose coupling algorithm, joint simulation between a multi-body system and a finite element system is realized. The method is not only suitable for coupling dynamic response analysis of the offshore wind turbine under the action of conventional wind wave load, but also suitable for elastic-plastic coupling analysis of the offshore wind turbine under the action of extreme typhoon load or earthquake load. In addition, the method not only can be used for coupling analysis of the offshore wind turbine of a traditional steel supporting structure, but also is suitable for integrated coupling analysis of the wind turbine of a novel steel-concrete structure on land or on the sea.

The invention discloses a finite element simulation method for evaluating the reliability of a battery structure, a product and a storage medium. The method comprises the following steps: constructing a battery finite element model comprising a shell and a sealing structure; defining elastoplastic material properties for the shell; applying a pressure load for simulating internal gas production and / or a mechanical load for simulating external impact; after solving, extracting a plastic strain result of the sealing structure area; and evaluating the integrity of the sealing function based on the result. According to the method, the elastic-plastic model is adopted, the limitation that a calculation result is distorted after a material is yielded in traditional linear simulation is overcome, and the plastic failure risk can be accurately predicted; meanwhile, a sealing function failure criterion based on plastic strain is innovatively established, and the problem that sealing performance evaluation of key connection structures such as riveting cannot be achieved is solved. According to the method, a systematic and quantitative safety boundary defining tool is provided for the battery structure design, and the reliability and efficiency of the design are remarkably improved.

The invention relates to the technical field of precision spring manufacturing and automatic control, in particular to a spring forming online control system and method. The system comprises a dynamic modeling module, a disturbance observation module, an impedance decoupling module and a trajectory correction module. The system calculates disturbance torque by constructing a mechanical transmission dynamics reference model and collecting servo parameters; the core of the method is to decouple a material deformation impedance component representing transient rheological characteristics of a wire rod from a disturbance torque, generate a position correction instruction based on an elastic-plastic compensation model, and dynamically adjust a forming track in a current period; according to the invention, the servo motor is multiplexed as a virtual probe, the hysteresis of visual detection is eliminated, the strength fluctuation of the wire rod can be effectively handled, and the product consistency is obviously improved.

The invention provides a laser cladding process parameter determination method based on finite element analogue simulation, and relates to the technical field of surface treatment. Comprising the following steps: importing a substrate material and a cladding layer material into finite element three-dimensional software to construct a corresponding finite element model; setting laser power, a preset temperature and a scanning path of the finite element model to obtain a finite element model of a variable process parameter set; performing finite element simulation by utilizing the final finite element model, and acquiring stress-strain data corresponding to each process parameter by utilizing a nonlinear heat conduction equation and an elastic-plastic stress-strain equation; and determining an optimal process parameter combination according to the stress-strain data. The method solves the problems that in the prior art, laser cladding Ni-60% WC composite powder lacks a systematic and accurate process parameter determination method when applied to the 45 steel surface, so that cracks, air holes and other defects are prone to being generated in a coating, and the comprehensive performance is difficult to stably improve.

The invention discloses an intelligent prediction method for welding deformation of a steel bridge deck based on physical-virtual double-domain collaboration and CNN-LSTM fusion modeling, relates to the technical field of welding process optimization and intelligent manufacturing, and aims to solve the problem that traditional welding deformation control mainly depends on empirical formula derivation and finite element thermoelastic-plastic analysis. However, the former is difficult to accurately reflect a nonlinear relation of a complex welding condition, and the latter has the problems of high computing resource consumption, low modeling efficiency and the like, and particularly, the prediction precision and the real-time performance are difficult to meet intelligent manufacturing requirements in the face of a multi-welding-seam coupling effect and a large-scale structure. The invention provides an intelligent prediction method for welding deformation of a steel bridge deck based on physical-virtual double-domain cooperation and CNN-LSTM fusion modeling, and the method comprises the steps: deeply fusing the dynamic mapping capability of the physical-virtual double-domain cooperation and the spatial-temporal feature modeling advantages of a CNN-LSTM fusion model, and synchronously integrating an NSGA-II algorithm to construct a process optimization closed-loop system; and high-precision prediction and process dynamic optimization of the welding deformation of the steel bridge deck are realized.

The invention discloses a heavy haul railway tunnel disease inversion evaluation method, and relates to the technical field of tunnel safety. Comprising the following steps: generating 216 working conditions by adopting an L27 (38) orthogonal table according to 8 types of key variables; establishing a tunnel three-dimensional elastic-plastic damage model based on an ABAQUS platform, wherein the tunnel three-dimensional elastic-plastic damage model is coupled with a dynamic load, a temperature field and a seepage field; inputting 216 working conditions into the three-dimensional elastic-plastic damage model of the tunnel to obtain structural response data; analyzing the structure response data through a Python script, and extracting key features; constructing a disease label data set based on the key features; and constructing a deep learning forward model and a deep learning inversion model containing physical constraints. The technical problems that in the prior art, data sets under the influence of multiple factors are lacked, and an inversion model lacks physical constraints are solved.

This invention discloses a method and system for real-time stress monitoring during laser additive repair of fatigue long cracks in turbine casings. The method includes: preparing a high-temperature resistant speckle pattern in the pre-treated repair area; simultaneously acquiring a sequence of speckle images and a sequence of temperature field images during the laser repair process; calculating the strain field based on digital image correlation and calculating the real-time stress evolution using thermo-elastic-plastic stress-strain increment theory. The real-time stress value is compared with a dynamic threshold set based on the material's yield strength, and the laser power or scanning speed is controlled based on the feedback of the result to achieve closed-loop control of the repair stress. This invention achieves high-precision real-time online monitoring of stress under extreme repair environments, providing a basis for optimizing and intelligently controlling repair process parameters, effectively suppressing residual stress and the risk of secondary cracks, and significantly improving the repair quality and reliability of turbine casings.

The invention relates to a nuclear power plant main pipeline damage tolerance establishment method. The method comprises the following steps: S1, determining the critical crack size of the main pipeline of the nuclear power plant at the end of the life; and S2, performing finite element calculation based on the established finite element model of the crack-free structure of the main pipeline so as to obtain stress distribution of the crack-free structure under each load working condition. S3, according to the initial crack size and the finite element calculation result, stress intensity factor calculation, transient pairing, elastic-plastic correction and fatigue crack propagation calculation are conducted in sequence, and the life end crack size of the main pipeline is obtained. And S4, when it is judged that the life end crack size of the main pipeline is smaller than the critical crack size, the step S3 is executed again to conduct iterative calculation on the initial crack size. And when the final crack size of the service life of the main pipeline is judged to be greater than the critical crack size, taking the initial crack size updated by the last iteration as the structural damage tolerance. The nuclear power pipeline defect evaluation period can be shortened, and the evaluation efficiency is improved.

The invention discloses a design method of an integral swing self-resetting structure for mounting a tension-compression energy-dissipation support, and relates to the technical field of civil engineering earthquake resistance, and the integral swing self-resetting structure comprises a tensile limiting device and a compression limiting device; the method specifically comprises the steps that a structural mechanical model is established, and the lateral stiffness of a traditional fixed foundation is calculated; setting a rigid body displacement ratio to determine the vertical and horizontal rigidity and strength of the support; carrying out finite element push-and-cover analysis to verify a rigid body displacement ratio; setting an additional damping ratio; carrying out seismic response spectrum analysis on the vertical seismic isolation structure; calculating the vertical natural vibration period of the structure and adjusting the rigidity according to the response spectrum; carrying out elastic-plastic time-history analysis to detect an interlayer displacement angle, acceleration and structural damage; checking the consistency of the additional damping ratio and the actual energy consumption; and finally, anti-overturning checking calculation under extremely rare earthquake is carried out to ensure that the support and the limiting device are in an elastic state. The energy dissipation capacity and anti-seismic safety of the structure can be effectively improved, and the structure is suitable for various building structures needing vertical and horizontal seismic isolation.

A method, apparatus, and software for an in-situ mechanical testing system to characterize heterogeneous deformation at microscale are disclosed. The current intellectual property landscape shows the in-situ mechanical testing of metals and alloys is severely limited to a maximum of about 1% macroscopic strain due to the optical microscopy's low depth of focus. To address this challenge, we disclose a smart imaging system consisting of several novel techniques. The techniques include digitally enhanced effective depth of field, real-time targeting and maintaining of a region of interest to image within the field of view and focus, and a panoramic imaging method to digitally widen the field of view. We also disclose a deformation quantification subsystem to analyze the collected data and quantify deformation characteristics. Finally, an expert system to extract the influence of microstructural features on the elastic-plastic and fracture properties is also disclosed.

The application is suitable for the technical field of machine tool combination assembly, and provides a micro contact joint surface static friction coefficient calculation method, which comprises the following steps: obtaining joint surface characteristic parameters; based on fractal theory and elastic theory, constructing base additional deformation and micro convex body normal deformation equation, through micro stress analysis, establishing single micro convex body deformation geometric parameters; considering three deformation stages of micro convex body, obtaining joint surface contact area and contact load; using modified island distribution function to integrate joint surface real contact area and contact load in different deformation stages, obtaining joint surface real contact area and contact load; considering the influence of static friction coefficient on contact surface characteristics, establishing joint surface static friction coefficient model. The application establishes surface static friction coefficient model from the micro contact angle, and simultaneously considers the interaction of micro convex body and base and three stages of material elastic, elastic-plastic and complete plastic deformation.

The utility model relates to the field of plastic runways, and discloses a combined type plastic runway buffer structure which comprises a supporting assembly and a positioning assembly, the positioning assembly is installed at the bottom of the supporting assembly, the supporting assembly comprises a bottom plate and a waterproof film, the top of the waterproof film is coated with a bonding layer, and the bonding layer is arranged on the bottom plate. Sealing sleeves are connected to the positions, close to the two sides, between the bottom plate and the waterproof film, the top of the bottom plate is filled with an elastic plastic layer, the top of the elastic plastic layer is filled with a rubber particle layer, and a plurality of rubber columns are installed in the elastic plastic layer and the rubber particle layer in a penetrating mode. The rubber columns are sealed, so that the overall buffering is improved, external moisture is prevented from entering, and the expansion can be adapted in the buffering process; and through the grating plate and the leveling layer, the adhesive force of the grating plate is increased, overall supporting and fixing are improved, and separation caused by sliding between the grating plate and the ground is prevented.

The invention discloses a cold stamping part drawing forming structure, a die and a springback control method, and belongs to the technical field of automobile cold stamping, and the cold stamping part drawing forming structure comprises a cold stamping part; the first end of the pre-forming model is arranged at the edge ridge of the cold stamping part; the first end of the craft model is arranged at the second end of the pre-forming model; and the flange edge is horizontally arranged at the second end of the craft model. The pre-forming model is designed at the edge ridge line of the cold stamping part, the pre-forming model converts elastic-plastic deformation of the open positive springback area of the curved surface of the cold stamping part into plastic deformation, closed control over the tangential ridge line is achieved, open positive springback within the contact angle range of the formed A surface is optimized, and the forming quality of the cold stamping part is improved. The open type positive springback within the 45-degree contact angle range of the forming A face is smaller than 1 degree, meanwhile, the overall open type positive springback of the forming A face is optimized, the forming quality of a cold stamping part is effectively improved, and therefore the quality of the whole automobile is improved.

The application discloses a viscoelastic-plastic simulation method based on a Bingham model, and comprises the following steps: obtaining a geometric model, material constitutive parameters and boundary conditions of a target geological body; constructing a complementary energy functional containing a viscous dissipation potential, and converting a Bingham viscoelastic-plastic constitutive relation into a mathematical programming problem constrained by a Drucker-Prager yield criterion; discretizing the geometric model space and introducing a time step, and discretizing the mathematical programming problem into a second-order cone complementary problem with a block-sparse structure, which contains a normalized second-order cone constraint equivalent to the Drucker-Prager criterion; performing smoothing treatment and solving by block elimination using the block-sparse structure to obtain a displacement field and a stress field. The application solves the problem that the existing convex programming solving framework cannot handle viscoelastic-plastic effects by introducing the viscous dissipation potential into the complementary energy functional.

The invention relates to the technical field of simulation, and provides a pressure-bearing equipment structure cracking analysis method and system based on key-type near-field dynamics, and the method comprises the steps: geometric modeling, material parameter definition and initial parameter definition; discretizing the model; modeling a heat conduction process; modeling a deformation damage process; initial boundary condition configuration; the temperature field and the displacement field are solved in an explicit-implicit mixed mode; and calculating integral values of a plastic zone, damage distribution and a crack tip. According to the method provided by the invention, the high-precision advantage of a heat conduction model based on a near-field dynamic differential operator, the high-efficiency and high-precision characteristics of a key-type near-field dynamic thermoelastic-plastic model and the high-efficiency advantage of an explicit-implicit thermal staggered solution algorithm can be fully played; and a scientific method can be provided for accurate analysis of thermal elastic-plastic damage fracture of a typical pressure-bearing equipment structure.

The invention discloses a wear-resistant antibacterial elastic plastic floor and a preparation method thereof, and relates to the technical field of polypropylene. The wear-resistant antibacterial elastic plastic floor is prepared from the following raw materials in parts by mass: 70 to 80 parts of polypropylene master batch, 15 to 35 parts of modified montmorillonite, 10 to 15 parts of elastomer flexibilizer, 3 to 5 parts of compatilizer, 0.1 to 1 part of antioxidant and 1 to 3 parts of lubricant, wherein the elastomer flexibilizer comprises a styrene elastomer and a propenyl elastomer in a mass ratio of 1: (3-4). According to the invention, the problems of poor compatibility and general toughening effect when the styrene elastomer and the allyl elastomer are used as elastomer toughening agents are solved, the use of the styrene elastomer with higher cost is reduced, and the synergistic improvement of excellent toughness, antibacterial property and aging resistance is realized under the condition of low elastomer addition amount.

The utility model discloses an escalator operation performance measuring instrument, and specifically relates to the escalator technology field, the escalator operation performance measuring instrument comprises a box body, the front side wall of the box body is fixedly connected with a plurality of first fixing plates, the tops of the first fixing plates are fixedly connected with a first limiting plate, two sides of the first limiting plate are provided with second limiting plates, and the second limiting plates are fixedly connected with the box body. And the outer side wall of one second limiting plate is fixedly connected with a lock rod, the outer side wall of the other second limiting plate is fixedly connected with a pull plug, a plurality of fixing rods are arranged in the second limiting plates in parallel, and a cover plate is arranged above the fixing rods. Through a series of reasonable arrangement of the lock ring, the lock groove, the lock rod and the like, the box body is firm and durable, and the situation that the box body and the box cover are generally clamped through elastic plastic, and the elastic plastic is prone to damage after long-time use, so that the box body cannot be sealed and is inconvenient to carry is avoided.

The invention discloses an irradiation hardening coefficient generation method and an irradiation hardening evaluation method, and relates to the technical field of irradiation hardening. The coefficient generation method comprises the following steps: performing ion irradiation on a test sample, and simulating according to ion irradiation parameters to obtain an irradiation damage depth distribution map; performing nanoindentation test on the test sample subjected to ion irradiation and a control sample of the test sample to obtain a first load displacement curve of the test sample and a second load displacement curve of the control sample; obtaining first and second simulated load displacement curves according to the first and second load displacement curves; obtaining a first elastic-plastic transition point and a second elastic-plastic transition point according to the first load displacement curve, the first simulated load displacement curve, the second load displacement curve and the second simulated load displacement curve; and obtaining the irradiation hardening coefficient according to the first elastic-plastic transition point, the second elastic-plastic transition point and the irradiation damage depth distribution map. Therefore, the radiation hardening can be quantitatively evaluated.

This invention discloses a rapid prediction method for rail rolling contact fatigue damage in the field of rail damage prediction technology. The method includes establishing a three-dimensional elastoplastic wheel-rail cyclic rolling contact finite element model, improving the cyclic plastic constitutive model, and simulating the stress-strain evolution of the rail. A rail stress-strain sample library is generated through parametric sampling and batch calculation. A Physically Constrained Generative Adversarial Network (PC-GAN) is constructed, embedding physical constraints such as contact force conservation and energy consistency into the loss function to achieve rapid and high-precision mapping from operating parameters to the stress-strain field. Based on the PC-AN prediction results, cumulative damage and fatigue life are calculated using an incremental multiaxial fatigue damage model, and a damage distribution map of the entire rail line is drawn, identifying high-risk sections. This invention deeply integrates physical modeling with intelligent algorithms, achieving an order-of-magnitude improvement in rail fatigue damage assessment efficiency while ensuring prediction accuracy, providing efficient and reliable technical support for rail life assessment and maintenance decisions across the entire rail line.

The utility model discloses a kind of line bundlers, including the first shell and second shell made of elastic plastic, the upper and lower ends of first shell and second shell are all provided with arc mouth, opposite arc mouth can form circular hole;The side of first shell is provided with integrally-formed insertion post;The side of second shell is provided with integrally-formed sleeve;When first shell and second shell are connected, insertion post can be inserted in sleeve;First elastic plastic wire fixing block is installed in first shell, and second elastic plastic wire fixing block is installed in second shell.Utilize the first elastic plastic wire fixing block and second elastic plastic wire fixing block with elasticity, with good elasticity, can be suitable for multiple line diameter difference not much cable, and the versatility is stronger;First elastic plastic wire fixing block and second elastic plastic wire fixing block are easily assembled and replaced;Through the cooperation of push button, wedge and ball, first shell and second shell are conveniently quickly disassembled, and convenient to use.

This invention relates to the field of structural design and strength assessment technology for nuclear fusion devices, and discloses a method, apparatus, equipment, and medium for elastoplastic analysis and strength verification under multiple operating conditions. First, the basic parameters, element partitions, and condition constraints of the target structure are obtained. Next, static nonlinear solutions are performed based on the basic parameters, element partitions, and condition constraints to obtain the target dataset and load-displacement curves. Different stress stages are abstracted as continuous gravity loading paths. A single elastoplastic analysis process is used to simultaneously evaluate the strength and deformation under multiple operating conditions, moving beyond the limitations of linear elastic calculations under a single condition and more realistically reflecting the actual stress state of the structure. Subsequently, based on the load-displacement curves, the allowable gravity amplification factor is determined. Further, based on the allowable gravity amplification factor, the target dataset, and the load-displacement curves, the safe strength elastoplastic results and high-risk areas are determined. Finally, based on the high-risk areas and preset reinforcement rules, a reinforcement scheme is obtained.

The application discloses a kind of theoretical model for evaluating pipeline steel macro-battery corrosion under elastic-plastic deformation, the theoretical model includes following physical field and coupling mechanism thereof: physical field: (1) stress-strain field: the elastic-plastic mechanics constitutive model based on von Mises yield criterion and isotropic hardening criterion is used to characterize the mechanical behavior of pipeline steel;(2) electrochemical field: the electrode kinetics model based on Tafel equation is used to characterize the corrosion reaction kinetics process on the surface of pipeline steel;Coupling mechanism: the mechanical-electrochemical double-path coupling mechanism for characterizing macro-battery corrosion.The model realizes the quantitative description of the macro-battery corrosion behavior induced by elastic-plastic deformation by coupling the mechanical deformation and electrochemical corrosion process of the material.The application realizes the two-way interaction of stress-strain field and electrochemical field under the background of macro-battery corrosion, and can quantitatively reveal the regulation of deformation on the intensity and evolution process of macro-battery corrosion.

A method for establishing a high-efficiency equivalent honeycomb numerical model relates to the field of vibration reduction, and comprises the following steps: carrying out tests of a honeycomb structure, including a mechanical parameter calibration test and a verification test; establishing a high-efficiency equivalent honeycomb numerical model according to a mechanical property test result obtained from the mechanical parameter calibration test; carrying out secondary development and verification on an elastic-plastic constitutive and damage model; in order to verify the effectiveness of the developed equivalent honeycomb model, the method can accurately represent the characteristics of anisotropy, strain rate effect, shear failure and the like of the honeycomb structure, and realizes high-precision prediction of honeycomb mechanical response, crushing deformation and shear tear failure under complex working conditions. A three-dimensional anisotropic constitutive model is established for the first time, the anisotropy of honeycomb elastic and plastic yield along with out-of-plane angle change can be accurately described, and the in-plane angle change anisotropy caused by the thickness difference of all edges of the honeycomb can be effectively reflected.

The application relates to a kind of methods for establishing elastic-plastic constitutive model based on neutral loading of granular material, comprising: using discrete element stress probing test to analyze the incremental stress-strain response of granular material under neutral loading condition;According to the strain response envelope of different states, under the framework of critical state theory, the plastic flow direction, plastic modulus and shear dilatancy coefficient suitable for the neutral loading condition are derived, and the constitutive model is constructed;The predictive ability of the constitutive model constructed under the neutral loading condition is verified by simulating stress probing test and principal stress axis rotation test.The beneficial effects of the application are that the application can accurately predict the plastic strain, shear dilatancy coefficient and plastic flow direction of granular material under the neutral loading condition, and solve the problem of inaccurate prediction of traditional models under the neutral loading condition.

This invention belongs to the field of tumbling finishing technology and aims to solve the problem that current residual stress simulations struggle to simulate workpiece surface material deformation. It provides a method for predicting residual stress in tumbling finishing based on elastoplastic deformation theory, comprising the following steps: equating a blank three-dimensional array to the workpiece's target region; constructing an EDEM simulation model and extracting contact information between the particulate medium and the workpiece; calculating the maximum overlap based on the contact information and dividing the collision into stages; calculating the contact stress distribution corresponding to the overlap at different collision stages; calculating the elastic stress field distribution of the target region at different collision stages based on the contact stress distribution and converting it into elastic loading stress for plastic correction; after loading, calculating the internal stress distribution under the cumulative action of all activated units in the blank three-dimensional array to obtain the residual strain and residual stress of the target region. This invention can simulate the deformation of workpiece surface materials, improving the accuracy of the simulation.

An insole or shoe liner for a shoe is disclosed. The shoe liner comprises at least one first layer made of a reversibly elastic plastic and at least one second layer made of a reversibly elastically deformable plastic. The second layer is connected to the first layer in sections. According to the invention, the first layer, which is arranged in sections below the second layer, is made of a plastic material that is harder than the second layer that is softer. The first layer extends from the heel of the foot of the wearer wearing the shoe to the foot hallux ball, and the second layer extends from the heel of the foot to the tiptoe and substantially follows the outer contour of the insole of the shoe. Furthermore, the first layer has, at least in the midfoot region, a lateral constriction and / or a double-sided constriction in a direction transverse to the longitudinal center axis of the shoe liner.

The invention discloses an immersed tunnel joint numerical simulation method considering a foundation differential settlement effect, and belongs to the technical field of settlement simulation, the method comprises the following steps: constructing a joint rigidity weakening equivalent PD shell model based on a near field dynamics plate shell basic theory, and obtaining a motion equation under a global coordinate system through coordinate transformation; an ideal elastic-plastic soil spring is used for representing soil-tunnel interaction, and a flexible joint is simulated through a local weakening method; dispersing the immersed tunnel by a meshless method, applying a soil spring by volume force and applying differential settlement in a quasi-static state; and solving the equation by adopting a self-adaptive dynamic relaxation format, and outputting pipe joint longitudinal deformation, joint opening amount and cracking risk results. According to the method, the pipe joint and joint deformation of the immersed tunnel under continuous and discontinuous working conditions can be evaluated more accurately, and the possible cracking risk can be effectively predicted.