38 results about "Transient kinetics" patented technology

A worm and worm gear pair heat-fluid-solid coupling analysis method comprises the following steps that 1, a heat-fluid-solid coupling simulation analysis model of a worm and worm gear pair is built, and a three-dimensional geometric model is built based on the worm and worm gear meshing principle; 2, parameterized grid division is carried out on the simulation analysis model, a tetrahedral unstructured grid is adopted for a fluid domain, and a worm and worm gear tooth surface area is densified; 3, based on the fluid dynamics theory and an RNG # imgabs0 # turbulence model, establishing an oil-immersed lubricating oil gas two-phase flow transient simulation model, and solving fluid dynamic pressure and a convective heat transfer coefficient through a pressure-speed coupling algorithm; 4, establishing a three-dimensional transient dynamic simulation model based on a solid mechanics theory, combining a temperature-stress coupling field equation, adopting an explicit dynamic algorithm, and iteratively solving thermal deformation and stress strain of the worm and the worm gear through a finite element method; and 5, bidirectionally transmitting the pressure of the fluid domain, the convective heat transfer coefficient and the thermal deformation data of the solid domain through the fluid-solid interface, and carrying out iterative solution until convergence.

The invention relates to the technical field of precision transmission, and discloses an impact resistance design method for a harmonic gear transmission mechanism, which is used for constructing an impact performance evaluation model by analyzing an impact force change rule in an engaging impact process. The method comprises the following steps: firstly, establishing a harmonic gear transmission impact model based on an improved kinematics method, calculating a contact force when a flexible gear is engaged with a rigid gear based on a Hertz contact theory and an elastic thin plate theory, solving a hysteresis damping coefficient in a collision process by combining a Hunt-Crossley hysteresis model with a damping coefficient and an energy conservation law, and calculating a harmonic gear transmission impact model according to the hysteresis damping coefficient. According to the method, a harmonic gear transmission collision process impact force model is established, an engaging-in impact force and impact duration conforming to a Hunt-Crossley hysteresis loop are obtained, an impact slow release index (IRI) is constructed, and the impact resistance of a harmonic gear transmission mechanism is evaluated. Through a transient dynamics analysis method, the accuracy of a theoretical impact model calculation method is verified. The method can effectively predict the shock resistance of the harmonic reducer, and provides a theoretical basis for the flexible gear profile design of the harmonic reducer.

The invention provides a failure safety topology optimization design method under a dynamic load. The method comprises the following steps: step 1, defining a design domain and design parameters of a structure; 2, performing transient dynamic analysis on the structure; 3, calculating to obtain an equivalent static load of the dynamic load; 4, performing failure safety topological optimization design on the model under the equivalent static load; the maximum flexibility of the minimization structure under the local failure condition is taken as an optimization target; carrying out optimization iteration on the design variable unit density by using a moving asymptote method until the internal loop failure safety topological optimization process is finished; and 5, according to the design variable updated after the failure safety topological optimization, judging whether an outer circulation convergence condition is met or not. According to the method, the possible local failure condition of the structure is fully considered in the design process, and the performance of the structure under the local failure condition is improved; the dynamic load under the original working condition is converted into the static load through the equivalent static load method, and the calculation efficiency of the optimization process is effectively improved.

The application discloses a grid-construction converter parallel system transient stability evaluation and enhancement method, and belongs to the technical field of power system transient stability evaluation; the evaluation method comprises the following steps: a differential-algebraic model of a hybrid system is established and is converted into a state space form, time variables are eliminated by performing quotient operation on equations to establish a time domain separation reduced-order model; a multivariable alternating iteration algorithm is used to solve implicit space trajectory integral equation groups, and a generalized transient kinetic energy is used to find a farthest point of a phase orbit, so that instantaneous generalized acceleration torque at the point is calculated to quantitatively evaluate transient stability margin of the system. The enhancement method comprises the following steps: a frequency deviation signal of a local phase-locked loop of the grid-construction converter is collected, and an active current reference value is dynamically reduced by a feedback controller to adjust output current. The application breaks through the order limitation of a traditional equal-area criterion, realizes accurate evaluation of a high-order hybrid system, and the control strategy can spontaneously reduce acceleration torque without station communication, thereby improving system synchronous stability.

The invention relates to a reaction cavity assembly for a diffuse reflection in-situ pool and a design method thereof, the reaction cavity assembly comprises an air inlet pipe, a dome upper cover and a reaction cavity which are connected in sequence, the reaction cavity is of a hemispherical shell structure made of a light-transmitting material, and the dome upper cover is of a flying saucer-shaped structure and comprises a circular ring part and a hollowed-out hemispherical shell with three hollowed-out areas. And the gas inlet pipe is axially and vertically arranged, so that reaction gas can axially and vertically enter a cavity formed by the diffuse reflection in-situ pool platform along the reaction cavity. Compared with the prior art, the gas flow field distribution uniformity is effectively improved through the axial gas inlet mode, the flow stagnation area and the large-scale vortex phenomenon caused by traditional lateral gas inlet are eliminated, gas flow is closer to the ideal plug flow state, and the accuracy of transient dynamic measurement is remarkably improved.

The application provides a length simulation calculation method for metal hoses for engines based on a finite element method, comprising the following steps: S1, importing a metal hose model into finite element software; S2, establishing a connection relationship between components; S3, calculating the maximum displacement of a servo actuator in the X direction under a follow-up coordinate system according to the maximum swing angle requirement of the engine; S4, setting the displacement-time load of the lower support point of the first servo actuator in the X direction under the first follow-up coordinate system, setting the displacement-time load of the lower support point of the second servo actuator in the X direction under the second follow-up coordinate system, and setting the total analysis step time; S5, performing transient dynamics analysis to simulate the maximum angle circle swing of the engine under the double servo actuators; and S6, observing the swing animation diagram according to the calculation result to analyze whether the length deformation of the metal hose is coordinated.

The invention discloses a starting noise control method and system of a hybrid electric vehicle and the hybrid electric vehicle, and relates to the technical field of vehicles. The method comprises the steps that relevant structure parameters of a hybrid engine are collected, and a thermodynamic simulation model of the hybrid engine is established and calibrated; different initial phase angles of the crankshaft are adjusted as input boundaries, and an engine cylinder pressure curve and torque fluctuation data are calculated; the method comprises the following steps: collecting parameter information of a hybrid engine, a dual mass flywheel and an all-in-one transmission, constructing a hybrid assembly dynamic model, and performing transient dynamic analysis and calibration to obtain a hybrid assembly transient dynamic model; adjusting the initial phase angle of the crankshaft, calculating the fluctuation of the output torque of the engine and the surface vibration amplitude of the junction surface of the gearbox to obtain the optimal initial phase angle, and calibrating and controlling the crankshaft to stop at the optimal initial phase angle when the hybrid engine flames out. The technical problem that in the prior art, when a hybrid engine is started, the abnormal sound phenomenon exists can be solved.

The invention provides a pumping detection TAP instrument, and relates to the field of transient dynamics and catalytic surface and interface research. The pumping detection TAP instrument provided by the invention comprises a sample injection pulse system, a micro reactor, a liquid nitrogen cooling system, a mass spectrum system and a vacuum system. Through the arrangement, the experiment of continuous pulse or intermittent pulse or pump-probe pulse of one or two gas molecules can be realized, so that surface chemistry and microdynamics information related to element steps can be obtained.

The invention relates to the field of structural design and impact dynamic modulation of sports equipment and handheld impact tools, and discloses an inertia-elasticity coupling modulation assembly based on controlled micrometric displacement and a dynamic regulation and control method thereof. The assembly can be embedded into an internal cavity of sports equipment or a tool and comprises a mass block, an elastic body or an elastic element, a limiting structure and an optional guide structure. The mass block generates controlled micro-displacement relative to the main body structure due to the inertia effect when high-speed impact or impact operation occurs to equipment or tools, and the elastic body or the elastic element is driven to deform in a controlled range and generate elastic restoring force, so that transient dynamic response of the impact process is participated in a millisecond-level time scale, and the impact force is generated. And the time distribution, the energy transfer mode and the transient stability of the structure of the impact force are modulated. Through the inertia-elasticity coupling modulation mechanism, on the premise that the original geometric structure and macroscopic mass distribution of equipment or tools are not obviously changed, the force output consistency in the impact process can be improved, transient torsion and local deformation sudden change caused by eccentric impact are restrained, and the impact strength of the equipment or tools is improved. And the stability and the fault tolerance of the equipment or the tool under the impact working condition are improved. The assembly has various structural forms and adjustable parameters, is suitable for handheld impact tools such as tennis rackets, badminton rackets, squash rackets, baseball bat, golf clubs, hammers, axes and the like, and has good universality and industrial application prospects.

The invention relates to a transient dynamic analysis method and device for a swing check valve, a storage medium and electronic equipment. The transient dynamic analysis method comprises the following steps that parameter information and design working conditions of the check valve are obtained; constructing a three-dimensional model of the check valve based on the parameter information and the design working condition; carrying out full-circulation transient fluid mechanics calculation based on the three-dimensional model to obtain a calculation result; performing internal flow field distribution characteristic analysis according to a calculation result to obtain internal flow field distribution characteristics of the check valve; and performing statistical analysis according to a calculation result to obtain a dynamic law of the check valve. According to the method, the high-precision transient dynamic characteristic analysis of the swing check valve is realized, the multi-working-condition adaptability is improved, the motion law of the valve can be quickly predicted, the safety is enhanced, the operation and maintenance cost is reduced, and the method is obviously superior to a traditional steady-state model.

The present application provides a vibration simulation method and device for a wind turbine generator set. The method includes: constructing a finite element model of the frame, where the finite element model includes a three-dimensional model of the frame and load mass points; determining the main nodes among the load mass points; according to the main nodes, condensing the finite element model into a super-element model; respectively performing modal analysis on the finite element model and the super-element model to obtain the natural frequencies of the finite element model and the super-element model and / or the vibration modes of the finite element model and the super-element model; when the ratio of the difference between the natural frequency of the super-element model and the natural frequency of the finite element model to the natural frequency of the finite element model is within a preset ratio range, and / or the vibration modes of the finite element model and the super-element model are basically the same, applying constraint and load boundary conditions on the super-element model; performing transient dynamics analysis on the super-element after applying the constraint and load boundary conditions to obtain the vibration information of the converter and / or the transformer.

The invention relates to a finite element dynamics simulation analysis method for bearing inner ring creep influence factors, and belongs to the technical field of mechanical engineering. The method comprises the following steps: establishing a deep groove ball bearing-stepped shaft finite element dynamic model by using three-dimensional modeling software; obtaining the contact pressure of the interference fit surface of the bearing inner ring and the shaft through finite element analysis, and comparing the contact pressure with an analytic solution of the Lame equation to verify the accuracy of the deep groove ball bearing-stepped shaft finite element kinetic model; and analyzing an influence rule of the magnitude of interference, the radial load and the pre-tightening force on the creep deformation of the bearing inner ring by utilizing finite element transient dynamics. Compared with the prior art, the method has the advantages that the influence rule of different interference magnitudes, radial loads and pretightening forces on the creep of the bearing inner ring is researched, measures for improving the creep resistance of the bearing inner ring are provided according to the influence rule, the defects of an experimental method are overcome, and the method has guidance and reference significance for improving the creep resistance of the bearing in engineering practice.

The application relates to a kind of transient load under the function gradient porous structure of multiphase filling dynamics topology optimization method and system, belong to the topology optimization design field of function gradient porous structure.The technical problems to be solved by the application are: how to fully exploit design space, construct the efficient function gradient porous structure of multiphase filling dynamics topology optimization method, realize the optimal anti-vibration design of porous filling structure with high-quality transient dynamic performance.Technical points: based on characteristic orthogonal decomposition method, the reduced transient dynamic finite element equation of function gradient porous multiphase filling structure is constructed;the material interpolation model and volume constraint model of function gradient porous multiphase filling structure are constructed, and the transient dynamic multiphase filling topology optimization reduced model with the minimum dynamic compliance as the optimization objective is proposed;the reduced sensitivity time-domain accompanying equation is constructed, and the sensitivity of dynamic compliance and volume constraint is efficiently calculated;based on ADMM-MMA hybrid optimization algorithm, the optimal topology design of function gradient porous multiphase filling structure is efficiently solved and obtained.The application can maximize the optimal anti-vibration performance of function gradient porous filling structure, and is especially suitable for the structure lightweight anti-vibration design of large engineering equipment.

The invention discloses a performance analysis method and device for an anti-impact cab and a program product, and relates to the technical field of performance analysis of off-road vehicle cables.The method comprises the steps that typical working conditions are determined according to different shooting working conditions, and flow field calculation is conducted; building a typical structure calculation model, and calculating the material strength grade and the material thickness by taking the impact strength performance as a target; a direct integration method is collected, transient dynamic analysis is carried out, and a stress cloud picture and a displacement cloud picture of the cab are obtained; scanning resetting is adopted in live firing verification, comparison with an analysis result is carried out, and collected loads are screened; judging whether the transient dynamic analysis is consistent with a test result, and if not, performing transient dynamic analysis again; and judging whether the strength meets the requirement or not, and if not, re-building the calculation model. According to the performance analysis method and device for the anti-impact cab and the program product provided by the embodiment of the invention, the development and verification efficiency of the cab can be remarkably improved, and the development period is greatly shortened.

The embodiment of the invention provides an air compressor energy recovery control system and method, and relates to the technical field of air compressor energy recovery technologies. The method comprises the following steps: monitoring operation state parameters of the air compressor system in real time; on the basis of the operation state parameters, predictive perception is conducted on a shutdown event of the air compressor system, so that a shutdown preparation instruction is generated; and in response to the shutdown preparation instruction or the external shutdown instruction, executing regenerative braking and recovery operation of transient kinetic energy. According to the invention, the problem of energy waste of the air compressor is solved, so that the effect of improving the energy utilization efficiency is achieved.

This invention provides a pump-probe (TAP) instrument, relating to the fields of transient dynamics and catalytic interface research. The TAP instrument provided by this invention includes a sample introduction pulse system, a microreactor, a liquid nitrogen cooling system, a mass spectrometry system, and a vacuum system. Through the above-described configuration, this invention can realize experiments involving continuous or intermittent pulses (also known as pump-probe pulses) of one or two gas molecules, thereby obtaining surface chemistry and microdynamic information related to elementary steps.

The invention discloses a dynamic driving experience-driven electric vehicle acceleration process dynamics response quality optimization method, which comprises the following steps of: 1) designing a longitudinal vibration suppression controller based on model prediction, designing a dual-objective optimization function considering longitudinal vibration suppression and torque tracking, and verifying the performance of the controller through simulation; 2) obtaining an objective index set and a subjective score set of the acceleration process; 3) utilizing a machine learning method to construct a subjective and objective evaluation model of the transient dynamic response in the acceleration process of the pure electric vehicle; and 4) optimizing weight coefficient selection by using the subjective and objective evaluation model. The dynamic response quality optimization method for the acceleration process of the pure electric vehicle driven by dynamic driving experience is researched, the test cost can be reduced in the forward design process, and technical support is provided for developing high-performance electric vehicle products.

The invention discloses a gear dynamic response analysis and calculation method and device, equipment and a medium. The method comprises the steps that S1, excitation frequency which does not generate a beat vibration phenomenon is screened out from inherent frequencies, obtained through modal calculation, transient dynamics calculation and verification, of a gear to serve as final excitation frequency; s2, determining the number of partial teeth loaded by the gear according to the overlap ratio of the gear, and carrying out analog loading instead of full-tooth analog loading by utilizing the final excitation frequency and the determined number of partial teeth to obtain an excitation load curve; s3, determining a corresponding gear damping ratio according to the material characteristics of the aviation gear; and S4, performing dynamic response solution according to the final excitation frequency, the excitation load curve and the gear damping ratio to obtain a dynamic response result of the target position. According to the method, the calculation precision of the real dynamic response of the gear in the damping state is improved; the gear meshing loading process is simulated through cyclic loading on a small number of gear teeth, and the simulation efficiency and computer memory consumption are remarkably improved.

The invention provides a spectrum coupling system based on TAP, and relates to the field of transient dynamics and catalytic surface and interface catalysis research. The invention provides an expansion device based on the TAP on the first aspect, provides a Raman spectrum coupling system based on the TAP on the second aspect and provides a UV-Vis DRS spectrum coupling system based on the TAP on the third aspect. According to the invention, the TAP-based expansion device is coupled with the Raman spectrum device or the UV-Vis DRS spectrum device, so that the synchronous characterization of the structure and chemical properties of the active site / active component of the sample under in-situ and near working conditions can be realized.

The application provides a numerical control machine tool optimization design method and device, electronic equipment and storage medium, belongs to numerical control machine tool optimization design technical field, method includes constructing the dynamic model of numerical control machine tool, dynamic model includes numerical control machine tool main body, tool and workpiece;The transient dynamic characteristic analysis is carried out to the dynamic model, and the start-stop impact characteristic curve of the tool tip and the workpiece is obtained;According to the start-stop impact characteristic curve, whether the dynamic error curve of the tool tip relative to the workpiece satisfies the preset dynamic error index is judged, if not, the modal analysis is carried out to the numerical control machine tool main body according to the frequency domain characteristic curve of the start-stop impact characteristic curve, the weak link of the numerical control machine tool main body is determined and optimized, until the dynamic error index is satisfied.The dynamic error of numerical control machine tool is characterized by the dynamic error curve of tool tip relative to workpiece, the dynamic characteristics of numerical control machine tool can be more accurately evaluated, and high-precision machining of numerical control machine tool is ensured.

The invention discloses a fluid-structure interaction dynamics simulation analysis method of a nuclear reactor control rod drive line under a multi-point excitation load. The method comprises the following steps: firstly, obtaining a fluid resistance rule in a control rod falling process in advance through fluid simulation and fitting a quantitative relation; secondly, simulating incomplete elastic collision and friction between the control rod and the guide structure by adopting a contact model based on a lubrication theory; and finally, on the basis of commercial finite element software, in each step of transient dynamic analysis, calculating and applying corresponding fluid force according to the real-time motion state of the control rod to realize fluid-structure interaction simulation, and supporting an explicit time integration algorithm and an implicit time integration algorithm. According to the method, the rod dropping process can be completely and accurately simulated, the simulation process is standardized, the use complexity is reduced, and an efficient and reliable virtual experiment means is provided for safety design and performance optimization of the control rod drive wire.

The present invention relates to a method for calculating the fatigue life of a steel belt ring of a belt-type CVT under high-speed conditions, including: performing transient dynamic analysis of the belt-type CVT; using an equivalent method to obtain a load spectrum of a steel belt ring micro-element segment running for one cycle, and then calculating the fatigue life of the belt ring under this specified condition; considering two types of situations, speed, torque change and speed ratio change under a fixed speed ratio, respectively, using the same life calculation method as the first two steps and combining the data interpolation method to obtain a theoretical life image of the CVT belt ring; considering general working conditions, first using a statistical method to obtain the probability distribution of the speed ratio, input torque and input speed under general working conditions; then considering the probability of the CVT theoretical life image and the input conditions to calculate the belt ring life at a fixed speed ratio; finally using the life of the belt rings with different speed ratios and the probability distribution of the speed ratio to obtain the actual life of the belt ring under general working conditions. The present invention provides a method for calculating the fatigue life of the steel belt ring from a theoretical perspective, which can accurately estimate the fatigue life of the steel belt ring.

The application provides a high-speed high advance ratio rotor transient dynamics analysis method, the method comprises the following steps: establishing a variable speed transient process dynamics equation, wherein the variable speed transient process dynamics equation comprises a system kinetic energy term; two coordinate systems are established, and the system kinetic energy term is derived based on the coordinate systems to obtain a system kinetic energy equation; a transient aeroelastic analysis model is established based on the system kinetic energy equation; variable speed transient dynamics analysis is carried out based on the transient aeroelastic analysis model to obtain transient aeroelastic response results; meanwhile, the application also provides a high-speed high advance ratio rotor transient dynamics analysis device; the application develops a high-speed high advance ratio rotor transient dynamics calculation method, studies the transient aeroelastic behavior characteristics in the variable speed process, and provides a theoretical basis and technical support for the development of high-speed high advance ratio rotors.

The invention relates to a fatigue damage tolerance evaluation method for a spaceflight power component in a vibration environment. The method is mainly used for solving the technical problem that the residual service life of a typical component of a spaceflight power system in a complex vibration load environment is difficult to accurately predict by an existing life prediction method. The method comprises the following steps: modeling a to-be-evaluated component and an initial crack on the to-be-evaluated component, performing transient dynamic analysis on a finite element model to obtain dynamic stress-time history data of the crack, and calculating the dynamic stress-time history data by adopting a stress extrapolation method to obtain stress intensity factor K-time history data of the crack; the time-domain variable-amplitude load is introduced into fracture mechanical modeling. And performing cyclic statistical processing on the stress intensity factor K-time history data by adopting a rain flow counting method to obtain a three-variable rain flow matrix of a stress intensity factor range delta K-cyclic ratio R-cyclic index n, and performing high-precision prediction on the residual life of the to-be-evaluated component.

The invention relates to a suspension launching device coating experiment technology, in particular to a suspension launching device paint coating virtual impact experiment method. The measurement range of the experiment table is narrow, the error of the test result is large, and the manufacturing period of the paint coating is long. According to the method, a transient dynamics theory and finite element simulation are adopted to obtain a relationship between the pit depth x and the initial velocity V of the punch, and fitting is carried out to obtain an equation between the pit depth x and the initial velocity V of the punch; building a suspended launching device paint coating impact experiment physical platform to obtain the pit depth x of the paint coating when the drop hammer falls from different heights H, and fitting to obtain an equation of the pit depth x relative to the drop hammer height H; according to an analytic expression of the punch initial velocity v relative to the drop hammer height H, calculating punch initial velocities under different height conditions to obtain pit depths and residual stresses under different height conditions; and evaluating the strength of the paint film according to the criterion. The confidence coefficient of the impact strength of the paint coating of the suspension launching device is improved, the experimental period is shortened, and the experimental efficiency is improved.

The application provides a tire transient instability processing method and device and a storage medium, relates to the tire vibration analysis technical field, and comprises the following steps: acquiring driving condition data of a tire, wherein the driving condition data comprises a rolling angular velocity, a vertical load and a dynamic unbalance eccentric moment; inputting the rolling angular velocity and the vertical load into a transient dynamics model to obtain a dynamic unbalance eccentric moment threshold value of tire transient instability, wherein the transient dynamics model is used for reflecting the corresponding relationship between the rolling angular velocity and the vertical load and the dynamic unbalance eccentric moment threshold value; and determining that the tire transient instability occurs when the dynamic unbalance eccentric moment is greater than or equal to the dynamic unbalance eccentric moment threshold value. According to the real-time driving condition data of the tire, the dynamic unbalance eccentric moment threshold value of tire transient instability is obtained through the transient dynamics model, the influence of the driving condition and the vertical load of the tire on the transient dynamics behavior of the tire is fully considered, the threshold value determination result is more accurate, and the safety and stability of the vehicle can be significantly improved.

The invention discloses a transformer on-load tap-changer fault monitoring method and system, and relates to the technical field of transformer on-load switch optimization, and the method comprises the steps: carrying out the mesh generation of an on-load tap-changer, and building an on-load tap-changer overall calculation model; on the basis of the overall calculation model of the on-load tap-changer, different boss angles of the on-load tap-changer are changed through space finite element discretization in transient dynamics simulation analysis, and key part calculation models of different boss angles are obtained; the stress distribution condition and the shaft stress condition of the key parts are obtained through the key part calculation model, so that the parts are actually replaced in time, the long-time support of the on-load tap-changer for the power grid load is effectively improved, the electric power accident rate is reduced, and the cost of the on-load tap-changer is saved.

The application relates to the technical field of vehicle body endurance simulation analysis, and discloses a part fatigue analysis method and device based on a whole vehicle road spectrum and a storage medium, wherein the method comprises the following steps: acquiring a vehicle body model and collecting a road spectrum response signal of a whole vehicle on a test field; processing the road spectrum response signal and obtaining force value signals of a plurality of vehicle body and chassis connecting points; inputting the force value signals into the vehicle body model, so as to perform transient dynamics simulation analysis on the vehicle body, and obtaining a first analysis result, wherein the first analysis result comprises a target part signal; inputting the target part signal into a target part, so as to analyze the target part, and obtaining a first signal of a function representing stress or modal coordinates on the target part changing with time; inputting the first signal into fatigue analysis software, so as to obtain a fatigue result of the target part; and judging whether the target part needs to be optimized based on the fatigue result.

The application discloses a gear dynamic response analysis calculation method, device, equipment and medium, the method comprises the steps that S1, the gear inherent frequency obtained from modal calculation, transient dynamics calculation and checking is screened out as the final excitation frequency which does not produce beat vibration phenomenon;S2, according to the coincidence degree of gear, the part of tooth number of gear loading is determined, the final excitation frequency, the determined part of tooth number is used to simulate loading to replace full tooth simulation loading to obtain excitation load curve;S3, according to the material characteristics of aviation gear, the corresponding gear damping ratio is determined;S4, according to the final excitation frequency, excitation load curve and gear damping ratio, dynamic response is solved, and the dynamic response result of target position is obtained.The application improves the calculation precision of the real dynamic response of gear in the calculation of damping state;Through the cyclic loading on a small amount of teeth, the meshing loaded process of gear is simulated, and the simulation efficiency and computer memory consumption are significantly improved.

The invention relates to a mechanism and AI hybrid modeling and optimization method applied to petrochemical pipeline vibration reduction, and the method comprises the following steps: S1, obtaining the detail features of a pipeline system based on a pipeline engineering drawing, constructing a flowing CFD model, and obtaining the transient pressure change process of the inner wall surface of a pipeline; s2, constructing a structure simulation model of the pipeline, and performing modal analysis and transient dynamic solution on a pipeline system to obtain a vibration characteristic response of the pipeline structure; s3, constructing a regression prediction model based on a neural network, adjusting simulation boundary parameters, defining boundary parameter characteristic variables, and obtaining pipeline boundary condition characteristic parameters meeting error range requirements through prediction of the regression prediction model and benchmarking with measured values; and S4, simulation is carried out based on the adjusted pipeline boundary condition characteristic parameters, fluid-solid coupling analysis is carried out, and an optimal vibration reduction scheme is generated by adjusting five mechanism factors. According to the method, the appropriate pipeline vibration reduction optimization scheme and the vibration reduction optimization effect can be rapidly determined.