47 results about "Temperature load" patented technology

The invention provides a special-shaped air film hole thermal mechanical fatigue simulation part design method, which comprises the following steps of: 1, analyzing the strength and the service life of a turbine blade, and identifying a key part of the service life of a special-shaped air film hole; 2, determining that the thermal mechanical fatigue simulation piece is of a hollow structure; 3, parameters of a clamping part of the hollow simulation piece are stipulated; 4, determining the mechanical stress of the key part through three-dimensional finite element simulation of the turbine blade; 5, verifying the included angle between the principal stress direction and the growth direction of the key part of the simulation part; step 6, measuring stress by using a strain gauge under a normal-temperature initial mechanical load, and verifying whether the load is compliant or not; 7, performing three-dimensional finite element simulation analysis on the temperature field of the test piece and calculating thermal stress; 8, controlling the thermal stress distribution of the section of the simulation piece by controlling the temperature distribution; step 9, when cooling gas is introduced into the inner cavity of the special-shaped gas film hole simulation piece, carrying out a thermal mechanical fatigue test by adopting an in-phase mechanical-temperature load; and step 10, optimizing the structure of the special-shaped gas film hole and analyzing the strength.

1. The name of the design product: Bridge expansion joint (wave shape). 2. The use of the design product: The design product is arranged at the bridge surface connecting position between two bridges, between the bridge end and the abutment, and is used to compensate for the bridge deformation caused by the temperature load, live load under normal conditions, and the earthquake load, impact load, settlement displacement under sudden conditions. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

This application provides a method for assessing the thermal fatigue life reliability of thermal interface materials. The method includes: applying boundary conditions and temperature loads to a simulation model of the thermal interface material; specifying the physical quantities of the thermal interface material to be output by the simulation model; and enabling the simulation model to perform simulation. Based on the simulation results, the method determines the thermal fatigue life reliability of the thermal interface material within a preset temperature variation range. This application solves the problem in related technologies where the assessment of the thermal fatigue life reliability of thermal interface materials relies on actual reliability testing after chip packaging, resulting in long processing times and high costs.

The invention provides an aircraft thermal structure on-orbit circulation and reentry atmosphere mission profile ground temperature loading method, a three-cabin intercommunicated temperature test device is established, three temperature loading environments can be provided, a test piece can be transferred among the three test cabins through a guide rail, rapid heating and cooling required by a test are provided, and the test efficiency is improved. A temperature load environment for providing on-orbit temperature circulation and reentry atmosphere aerodynamic heat for a test piece can be simulated, and engineering requirements are met.

The present application belongs to the technical field of intelligent building energy efficiency management, and discloses a constant-temperature load dynamic modeling method based on federated learning and domain knowledge enhancement, which collects hot water system operation data through multi-site sensors to construct structured modeling input; generates boundary enhancement samples by using physical boundary characteristics; designs a neural network model embedded with domain knowledge and integrates a physical constraint mechanism; realizes multi-client collaborative training and model aggregation by using a federated learning framework, and improves the model generalization ability and privacy protection level. The present application realizes high-precision temperature prediction and energy consumption modeling of multi-site hot water systems under the premise of protecting user data privacy, and solves the problems of poor physical consistency, low modeling precision and difficult data sharing in the prior art.

This application discloses a digital twin analysis method and device for coke tower strain based on the cold point effect, relating to the field of coke tower stress analysis technology. The method includes: constructing a three-dimensional solid model based on point cloud data; constructing a structural digital twin model of the target coke tower based on the three-dimensional solid model; determining the region with the largest bulging on the target coke tower shell and continuously collecting the metal wall temperature-operation time curves at each monitoring point within the current working cycle; compiling the load steps of the cold point temperature loading history based on the metal wall temperature-operation time curves of the non-cold point region and the cold point region, and determining the digital twin temperature field of the target coke tower; obtaining the digital twin stress-strain analysis results through transient stress analysis in finite element software. This application performs digital twin simulation of the strain of coke tower equipment by considering the cold point effect of in-service coke towers and combining temperature monitoring statistics with finite element numerical analysis.

The invention provides a device and a method for testing sound fatigue characteristics of a component under joint action, and the device comprises a frequency measurement device, a light-transmitting thin plate, a temperature loading device, a static load loading device, a clamp, a vibration loading device, a temperature measurement device and a strain measurement device, and the temperature loading device comprises a temperature environment simulation box; the vibration loading device is arranged at the bottom of the element acoustic fatigue characteristic test device, the clamp is fixed on the vibration loading device, and the static load loading device is arranged opposite to the clamp; a test piece is clamped between the static load loading device and the clamp, and a temperature sensor of the temperature measuring device and a strain sensor of the strain measuring device are pasted on the test piece; the static load loading device and the clamp are sleeved with the temperature environment simulation box, and the top of the temperature environment simulation box is covered with the light-transmitting thin plate; and the frequency measuring device is arranged towards the light-transmitting thin plate. When the sound fatigue characteristic test is simulated, the static load and the temperature are considered at the same time, and the sound fatigue life of the test piece can be more accurately tested.

The application discloses a kind of high-speed centrifuge in-situ heating under high temperature of high speed effect temperature calibration test method.Determine the parameters of centrifuge and test sample, install a temperature calibration sample and multiple test samples in sample chuck and insert thermocouple;In the case of not starting centrifuge, keep still, vacuum control temperature system controls inductive heating system, circulating water cooling system work to test sample and temperature calibration sample to apply temperature load, after temperature reaches predetermined temperature and keeps temperature;Analysis and processing obtain the parameters of upper and lower induction coils when formal test measurement;Remove temperature calibration sample, replace test sample, start the main shaft rotation of centrifuge again and reach speed, control according to the parameters obtained in the fifth step until test sample is pulled off and broken.The application solves the deficiency that current high-speed radiation heating can only check ambient temperature but cannot accurately check sample temperature under high speed, and can directly check sample temperature under high speed, so that the temperature of test component is more accurate.

The application provides a material high-temperature performance testing device and method, which comprises a columnar expansion body, a first rigid connecting plate, a second rigid connecting plate, a creep fatigue sample and a high-temperature box. The columnar expansion body is provided with a central hole in the axial direction. The first rigid connecting plate is connected to one end of the columnar expansion body. The second rigid connecting plate is connected to the other end of the columnar expansion body. The creep fatigue sample is arranged in the central hole and is connected to the first rigid connecting plate and the second rigid connecting plate in an interference fit. The columnar expansion body, the first rigid connecting plate, the second rigid connecting plate and the creep fatigue sample are all arranged in the high-temperature box. The material linear expansion coefficient of the columnar expansion body is greater than that of the creep fatigue sample, and the material linear expansion coefficient of the creep fatigue sample is much greater than that of the first rigid connecting plate and the second rigid connecting plate. The application can realize multiple form loading matching temperature load and force load and realize the testing of the high-temperature performance of the material.

The invention discloses a force-heat coupling verification test method suitable for a thruster support, and the method comprises the steps: determining test piece parameters according to a product design state and a verification purpose; determining test loads including a force load and a temperature load according to force and thermal simulation results and a test purpose; designing a test fixing clamp; determining a loading mode and a control mode of the force load and the temperature load according to the test load; a thruster support is fixed on a test fixing clamp, and according to a loading mode and a control mode of a load, a force-heat coupling loading method is adopted to carry out force-heat coupling verification. The method has the advantages of flexible application of coupling and decoupling working conditions, simple operation, wide application range, accurate and reliable result and the like.

1. The name of the design product: Bridge seamless expansion joint (arch type). 2. The use of the design product: The design product is arranged at the bridge surface connecting position between two bridges, between the bridge end and the abutment, and is used to compensate for the bridge deformation caused by the temperature load, live load under normal conditions, and the earthquake load, impact load, settlement displacement under sudden conditions. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The application discloses a kind of quantitative evaluation methods of sealing performance of flared pipe connection pair considering temperature load action, and relates to the field of flared pipe joint structure optimization.Can give consideration to the sealing performance quantitative evaluation method of flared pipe connection pair of multiple physical field and multiple scales with the efficiency of calculation precision, to improve the scientificity and effectiveness of sealing reliability design and evaluation of flared pipe joint under the action of temperature load.S1, establish the finite element model of flared pipe connection pair;S2, simulate and analyze the temperature field distribution and mechanical properties of flared pipe connection pair under the action of temperature load;S3, establish the leakage rate calculation method of flared pipe connection pair.Provide a powerful quantitative tool for the rapid evaluation and design iteration needs in engineering, can improve the scientificity and effectiveness of sealing design reliability and prediction in key fields such as aviation hydraulic system and pipeline connection.

The application discloses a C / SiC material multilayer thermal protection structure force-thermal coupling analysis test system and method, which comprises a thermal load simulation module, a pressure load simulation module, a data acquisition module and a test piece. The thermal load simulation module is warmed up by signal control transformer power output; a thermocouple is used to measure the temperature distribution of the innermost inner wall surface of the test piece during radiation heating, so that the thermal boundary condition of the test piece is obtained; the pressure load module is simulated by placing loads with different masses above the test piece; and the data acquisition module collects deformation data of the test piece under the action of force-thermal coupling and temperature distribution data of the outer wall surface of the rigid aerogel layer of the test piece. The application can obtain the distribution characteristics and variation rules of the temperature field and the strain field of the multilayer thermal protection structure under different pressure loads and different temperature loads, and provides a principle test verification method for the analysis model of the ceramic matrix composite multilayer thermal protection structure.

The invention discloses a thermally induced deformation prediction method and system for a machine tool stand column. The method comprises the steps that an overall three-dimensional temperature field of the machine tool stand column is obtained; obtaining a node-level temperature load sequence of time step-node number-node temperature; obtaining a three-dimensional transient temperature field of the upright post at each time step and a three-dimensional thermally induced deformation field of the upright post along with time; obtaining a thermal driving force index, a structure energy accumulation index and a geometric response sensitivity index after normalization; superposing the indexes to form a multi-scale thermal response scoring field Score (X), and automatically identifying thermal sensitive areas according to a high-quantile threshold value of the Score (X) and sorting the areas; a global correction coefficient is obtained, thermal expansion coefficients in the thermal-structure sequential coupling model are uniformly scaled, an updated thermal-structure sequential coupling model is obtained, and thermal deformation prediction of the machine tool stand column is achieved; according to the invention, the thermal deformation prediction of the whole machine can be quickly obtained.

The application discloses an intelligent design method for winding tension of a composite hydrogen storage cylinder, relates to the technical field of the composite hydrogen storage cylinder, and establishes a finite element model, applies temperature loads to composite material winding layers layer by layer based on an equivalent cooling method, completes simulation calculation, obtains winding tension combinations F and residual fiber stress combinations sigma under each temperature drop amount combination DT, and constructs a simulation database; based on the simulation database, two neural network proxy models M1 and M2 respectively representing mapping relationships between DT and F and between DT and sigma are constructed; a loss function is constructed, and an optimal temperature drop amount combination DT is obtained based on an optimization algorithm best ; and optimal winding tension combinations F best are predicted by using the proxy model M1 according to the DT best . The application realizes intelligent and efficient design of fiber winding tension of the composite hydrogen storage cylinder based on two neural network proxy models and an optimization algorithm.

This application discloses an isogeometric transient temperature field analysis method integrating birth and death element technology, relating to the field of computational mechanics. The method includes establishing an isogeometric NURBS model, calculating the element heat transfer matrix, element thermal melting matrix, and element load array; determining whether the current calculation element is in the computation time domain; if not, setting the element heat transfer matrix and element load array to 0; if so, restoring the loads corresponding to the element heat transfer matrix and element load array, and removing the loads shared by the element and other elements in the computation time domain at their boundary; assembling the element heat transfer matrix, element thermal melting matrix, and element load array into a global matrix, and constructing the heat transfer equation based on the global matrix; calculating the temperature of the control points based on the heat transfer equation, and determining the temperature field of the final solution domain. This application considers the realization of an isogeometric transient temperature field analysis method under complex temperature load conditions including time-series problems, promoting the application of isogeometric analysis in engineering.

The invention discloses a quantitative analysis method for performance difference of key components after slab replacement of a ballastless track and a related device, and relates to the technical field of ballastless tracks of high-speed railways. Acquiring an elastic coefficient test parameter; according to the actual state data, the springback test parameters and the elastic coefficient test parameters of the ballastless track structure, a spatial refined simulation model is constructed; based on a preset temperature load, carrying out analogue simulation on the spatial refinement simulation model to obtain a stress parameter change value of the normal service track plate; the stress parameter change value is used for quantitatively analyzing the influence of the performance difference of the key components on the ballastless track structure stress after the plate replacement operation. According to the method, quantitative analysis of the influence of the performance difference of key components on the ballastless track structure after the plate replacement operation can be realized.

This invention proposes an intelligent heat dissipation method and system for dry-type transformers. The method includes: collecting the winding temperature, core temperature, load rate, and ambient temperature of the target dry-type transformer to construct a thermal state baseline; calculating and generating a thermal risk assessment result based on the thermal state baseline at the current moment and the previous two sampling periods; comparing the thermal risk assessment result with a benchmark risk value and an enhanced heat dissipation threshold, calculating a target heat dissipation intensity coefficient through a combination of linear adjustment terms and quadratic enhancement terms, and mapping it to a heat dissipation control decision; gradually approximating the target heat dissipation intensity coefficient in the heat dissipation control decision using a first-order inertial recursive method to generate an execution intensity coefficient for the current sampling period, thus completing the heat dissipation control operation. This invention can better solve the problems of traditional threshold control's late intervention, insufficient precision in heat dissipation actions, frequent switching of actuators, and insufficient adaptability to different field conditions.

The invention provides a method for testing friction torque of a rotary hinge in a pre-tightening state, which comprises an optical experiment platform, a fixing system, a pre-tightening system, a hinged connecting rod, a heating device, an excitation system and a signal acquisition system, and is characterized in that the fixing system is fixed on the optical experiment platform through a bolt, and one end of the hinged connecting rod is fixed on the fixing system; the method comprises the steps that a hinge is arranged at one end of a hinge connecting rod, pre-tightening force is applied to the hinge through a pre-tightening system, the other end of the hinge connecting rod is excited through an excitation system, then dynamic response parameters of the hinge connecting rod are synchronously collected through a signal collecting system, in addition, the influence of temperature loads is simulated through a heating device, and finally the joint friction torque is obtained through collected response data. Pre-tightening force is accurately applied through the pre-tightening system, extra torque generated by pulling force of the inhaul cable when the hinge rotates is avoided, kinetic parameters of the hinged connecting rod are comprehensively collected through multiple sensors, and the problems that an existing experiment platform is not accurate in pre-tightening force control and single in working condition simulation are solved. And the accuracy and functionality of the experiment for testing the friction torque of the rotary hinge are improved.

The invention discloses a method and a system for processing strain data of upper concrete of an inverted-T-shaped cover beam bridge deck, and relates to a bridge technology. The method comprises the following steps: acquiring structural parameters of the inverted-T-shaped cover beam bridge deck; according to the structural parameters, calculating the strain generated by the temperature load on the upper concrete of the inverted T-shaped cover beam bridge deck; calculating the strain generated by the beam end rotation load on the upper concrete of the inverted T-shaped cover beam bridge deck; calculating concrete generated by the dead weight of the bridge deck on the upper part of the inverted T-shaped cover beam bridge deck; calculating the concrete generated by the vehicle load on the upper part of the inverted T-shaped cover beam bridge deck; from this, the total strain is calculated. The method aims at solving the problem that a traditional simply supported girder bridge deck continuity theory is based on a two-dimensional simplified model, continuous three-dimensional space stress characteristics of an inverted T-shaped bent cap bridge deck cannot be accurately reflected, and consequently the deviation between a strain calculation result and the reality is large, and the stress calculation precision is improved.

The application discloses a life evaluation method considering multi-axial thermal mechanical fatigue damage mechanism, utilizes equivalent temperature to grasp characteristic information of temperature load in multi-axial thermal mechanical fatigue load history, and provides a temperature dependence influence factor calculation model based on hyperbolic tangent function, and the influence of temperature on damage is considered. The influence of longer cycle period and the introduction of holding time on failure life is considered by utilizing time dependence influence factor. The influence of non-proportional additional hardening on fatigue and oxidation damage is considered by adopting Shang-Wang multi-axial damage model. The influence of material rapid cracking on failure life caused by the comprehensive action of high temperature, tensile stress and shear stress is considered by utilizing rapid cracking influence factor. The failure life results of uniaxial isothermal fatigue test with and without holding time, uniaxial and multi-axial thermal mechanical fatigue test are utilized to verify the proposed method, and the prediction error is within 2 times factor, and the method is applied to failure life prediction of actual high-temperature structure.

The invention discloses a photoetching machine lens thermal deformation analysis method and device, electronic equipment and a storage medium, and the method comprises the steps: building a lens three-dimensional model and an assembly three-dimensional model according to a lens structure and an assembly structure of a photoetching machine, and installing the lens structure by the assembly structure; establishing a thermal analysis grid according to the three-dimensional model of the lens; wherein the unit size of the thermal analysis grid in the heat sensitive area is smaller than the unit size of other areas; establishing a structural analysis grid according to the assembly three-dimensional model; wherein the unit size of the structure analysis grid in the mirror surface shape and assembly connection area is smaller than the unit size of the rest area; according to a preset sequence, temperature fields obtained through calculation of the thermal analysis grid are mapped to the structural analysis grid through interpolation, a coupling field grid is established, and the thermal deformation amount and / or thermal stress of the lens under the temperature load are / is calculated. Simulation can replace part of experiments, the research and development period is shortened, product iteration is accelerated, and cost is reduced.

The embodiment of the invention discloses an axial flow fuel rod static instability analysis method considering temperature load, which comprises the following steps: expanding the transverse vibration displacement w of a fuel rod into a finite series of a modal function, setting the fluid velocity around the fuel rod as U, and describing a velocity field of a fluid domain through a potential function, the vibration potential energy and kinetic energy of the fuel rod considering the temperature load are obtained according to the axial stress and strain relation of the fuel rod, so that a fuel rod vibration control equation considering the temperature load is derived, and w and the fluid force borne by the fuel rod in the transverse direction are substituted into the control equation, so that the fuel rod vibration control equation considering the temperature load is obtained. And obtaining a matrix form of the fuel rod transverse vibration control equation considering the temperature load, and solving a characteristic value of the matrix to judge the stability of the vibration system, namely the stability of the fuel rod. The method is beneficial for revealing influence mechanisms of reactor heating power, material parameters, assembly gaps and the like on the static stability of the fuel rod.

The application discloses a robot parameter identification method and system based on a temperature load extended friction model, and relates to the technical field of robot dynamics modeling and control. The method comprises the following steps: optimizing a friction separation path through designing a strict constraint excitation trajectory, collecting experimental data under different temperature load conditions through robot joint friction characteristic testing based on the friction separation path; constructing a Stribeck friction model, performing temperature and load polynomial processing on key parameters, and obtaining a Stribeck effect extended friction model based on temperature, load and speed; and adopting a hierarchical identification scheme of temperature first and then load, and using the Stribeck effect extended friction model of temperature, load and speed to identify robot joint friction parameters from the experimental data. The application realizes accurate identification of robot joint friction characteristics and parameters under variable temperature and variable load combined conditions.

A remote monitoring method of power equipment, a server, a product and a medium, relate to the field of safety production monitoring. The method comprises the following steps: synchronously acquiring real-time running temperature, load current and multi-dimensional meteorological parameters of the environment of the power equipment; inputting the load current and multi-dimensional meteorological parameters into a preset normal state regression prediction model to output a theoretical temperature value under the current working condition; calculating a temperature residual value between the real-time running temperature and the theoretical temperature value; if the real-time running temperature is less than or equal to a preset static alarm threshold, and it is determined that the temperature residual value is always greater than a preset residual alarm threshold within a time window, a fault uploading instruction is generated; then the data uploading frequency is adjusted to an alarm uploading frequency, and the preset historical period running data and the real-time data are packaged and uploaded. The application excludes the interference of external cooling effect, effectively captures the latent fault hidden by the static threshold, and improves the accuracy of power equipment monitoring under complex weather.

The invention provides a ship fire temperature assessment method, device and equipment, and relates to the technical field of computer information technology processing.The method comprises the steps that a finite element mesh model of a target ship is established, the finite element mesh model discretizes the target ship into a preset number of units, each unit comprises a plurality of nodes, and the nodes bear temperature loads; acquiring an environment temperature result of each time step obtained by performing fire analysis on the target ship; the environment temperature results of the target time range and the target space range serve as external loads and are mapped to target nodes of the finite element mesh model; and performing solid heat transfer finite element analysis on the finite element mesh model according to preset model simulation parameters to obtain a solid heat transfer temperature distribution result of the target ship in the fire scene. According to the scheme, typical fire dynamic simulation data and a solid heat transfer analysis unit are systematically fused, and temperature distribution in a ship structure fire scene is simulated.

This invention provides a method for applying temperature load to a cylinder head simulation component. The method includes: determining temperature conditions based on the operating conditions of an internal combustion engine; obtaining a temperature field based on the temperature conditions, and determining observation points in the cylinder head nose area based on the temperature field; measuring the observation points to obtain observation data, and determining induction coil parameters based on the observation data; and obtaining a temperature load application scheme based on the induction coil parameters. This method accurately simulates the temperature load experienced by the cylinder head during actual operation using the temperature conditions of the cylinder head temperature field and the induction coil parameters, and determines the temperature load application scheme.

The invention provides a method for analyzing thermal stress of a thin-wall reinforced cylindrical structure under a temperature spectrum, and belongs to the technical field of structural thermal stress analys.The method comprises the steps that thermal stress distribution of the thin-wall reinforced cylindrical structure under any temperature load working condition is obtained, recording the inner wall loading temperature, the temperature of the key part and the thermal stress of the key part of the thin-wall reinforced cylindrical structure under the temperature load working condition; a thermal stress expression is constructed according to the linear relation between the thermal stress and the difference between the inner wall loading temperature and the temperature of the key part, and correlation coefficients are obtained through calculation of the thermal stress expression; and obtaining any temperature load spectrum, and estimating the thermal stress of the corresponding key part under any temperature load based on the temperature load spectrum, the thermal stress expression and the correlation coefficient, thereby obtaining the thermal stress spectrum of the key part of the thin-wall reinforced cylindrical structure.

The application provides a seamless line long-term cyclic temperature load mode forming method and system applicable to time history analysis, belongs to the technical field of railway seamless line operation and maintenance, determines a seamless line work point position, and obtains local environmental temperature data; an empirical wavelet decomposition algorithm is used to separate annual cycle signals and daily cycle signals of the environmental temperature; annual temperature components of the cyclic load are obtained through formula fitting; daily extreme temperature curves of the rail temperature are obtained; daily temperature components are calculated according to the geographical position and in combination with daily extreme temperature characteristics; the annual temperature components and the daily temperature components are superimposed to form complete long-term cyclic temperature loads. The application can calculate the temperature load according to meteorological data and in combination with the seamless line design specification, so that the long-term cyclic temperature load mode has good universality; time-frequency analysis methods are used to extract and analyze the time characteristics of the seamless line temperature data, which can provide a reference basis for the design of the long-term cyclic temperature load of the seamless line.