69 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.

The invention relates to the technical field of machine room heat dissipation, in particular to a control system and method for machine room heat dissipation, and the system comprises a refrigeration unit which comprises a gas-liquid heat dissipation heat pipe module arranged in a server heating area and a cold source of at least one refrigeration mode; the monitoring unit is used for collecting temperature and load data when the server runs; a control unit having at least two cooling dynamics adjustment logics and a processor for executing the two cooling dynamics adjustment logics; one cooling adjustment logic is a coarse adjustment logic based on the temperature difference value of inlet and outlet gas / liquid of the gas-liquid heat dissipation heat pipe module, the other cooling adjustment logic is a fine adjustment logic based on load monitoring data and a prediction model, the coarse adjustment logic is executed firstly to judge whether a cooling mode is started or not, and then the fine adjustment logic is executed to optimize cooling resource allocation. The method not only depends on the temperature difference value to judge the switching of the cooling mode, but also combines with the prediction of the future load change trend to perceive the heating sudden increase caused by the load fluctuation in advance.

The invention relates to the technical field of air conditioning refrigerating systems, in particular to a chilled water cascade energy-saving control method and a chilled water cascade energy-saving control system for a chilled water cold storage system, and the method comprises the following steps: calculating low-temperature load cold storage capacity, medium-temperature load cold storage capacity and high-temperature load cold storage capacity of a cold storage container; according to a local power grid policy, determining peak, flat and valley periods; determining low-temperature, medium-temperature and high-temperature load cooling time; collecting hourly cold loads and corresponding meteorological parameters of low-temperature, medium-temperature and high-temperature chilled water when the refrigerating system operates; training to obtain a model; according to meteorological parameters of hourly weather forecast of the next day; summing the predicted high-temperature, medium-temperature and low-temperature hourly loads of the next day in the peak period of the power grid; a low-temperature load cold release strategy is formulated; formulating a medium-temperature load cold release strategy; a high-temperature load cold release strategy is formulated; and according to the determined low-temperature, medium-temperature and high-temperature cold release time, opening and closing of each valve of the system are controlled, and each cold release process is completed.

The invention relates to a bridge prestressed reinforcement elastic compression loss prediction method and system and a storage medium. The method comprises the following steps: simulating a bridge model through finite element software; the sum of all the prestressed reinforcement units is calculated, and temperature loads applied to all the reinforcement units are calculated; according to a prestressed reinforcement tensioning sequence and a life-death unit method, temperature loads are applied to reinforcement units one by one, and calculation is carried out; the method comprises the following steps: constructing an original data set, preprocessing, and dividing to obtain a training set, a verification set and a test set; constructing an MLP multilayer perceptron neural network model as a prediction model of the elastic compression loss of the bridge prestressed reinforcement to the concrete, and training the prediction model; and utilizing the trained prediction model to predict concrete elastic compression prestress loss caused by tensioning other prestressed reinforcements by the prestressed reinforcements. According to the invention, the elastic compression loss prediction of the bridge prestressed reinforcement can be quickly and accurately realized.

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.

The application discloses a hydrogen-induced cracking acoustic testing system and method, which comprises an electrochemical environment simulation device, a stress loading device, a temperature loading device, an acoustic emission testing device and a control device. The electrochemical environment simulation device is internally provided with a test piece and is used for providing a corrosion environment required by hydrogen-induced cracking testing. The stress loading device and the temperature loading device are used for providing specified load force and temperature required by testing. The acoustic emission testing device is used for recording acoustic emission signals generated after starting hydrogen-induced cracking testing under the conditions of the specified load force and the temperature. The control device is used for starting the electrochemical environment simulation device and the acoustic emission testing device when the stress loading device and the temperature loading device respectively reach the corresponding specified load force and temperature, and receiving the acoustic emission signals, so as to analyze the evolution law of hydrogen-induced cracking of the test piece material. The application truly simulates the working condition of the hydrogen-induced cracking process of the test piece material, studies the hydrogen-induced cracking performance of the material, and improves the accuracy and reliability of the experimental results.

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 relates to the technical field of inverter temperature control, in particular to an inverter temperature control method and system, and the method comprises the following steps: predicting an environment temperature sequence in a period of time in the future through a pre-built environment temperature prediction model, and calculating a feedforward control quantity through a feedforward controller according to the environment temperature sequence; pre-adjusting heat dissipation resources of the inverter based on the feedforward control quantity; the real-time temperature of a cooling fin of the inverter is obtained, and the feedback controller calculates the feedback control quantity according to the real-time temperature of the cooling fin; performing dynamic compensation on the prediction error of the feedforward control quantity according to the feedback control quantity to obtain a compound control quantity; and calibrating the heat dissipation resource based on the compound control quantity. According to the method, the heat dissipation resources are pre-adjusted by predicting the environment temperature, the response time of sudden change of the environment temperature can be shortened, and temperature overshoot or over-temperature load reduction, caused by lagging adjustment, of the cooling fins is avoided; feedforward control and feedback control form a double closed loop, pre-adjustment and calibration cooperation is achieved through dynamic weight adjustment, and the temperature control precision is improved.

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 invention relates to the technical field of chips, in particular to a method for obtaining a service life model of a chip welding spot under a temperature load. Compared with the prior art, fatigue life measurement and welding spot failure evaluation of different soldering tin materials under the temperature load are realized by adopting a false chip model and through a high-low temperature cycle test; through mathematical statistics and fitting of experimental data and in combination with establishment and calculation of a simulation model, parameter fitting of a welding spot reliability model based on the experimental data and simulation data is realized, and a theoretical basis is provided for analysis and prediction of the fatigue life of a chip welding spot under temperature circulation.

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 invention provides a device and a method for testing the high-temperature performance of a material. The device comprises a columnar expansion body, a first rigid connecting plate, a second rigid connecting plate, a creep fatigue sample and a high-temperature box, a center hole is formed in the columnar expansion body in the axis 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; a creep fatigue sample is arranged in the central hole and is in interference fit connection with the first rigid connecting plate and the second rigid connecting plate; 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 larger than that of the creep fatigue sample, and the material linear expansion coefficient of the creep fatigue sample is far larger than that of the first rigid connecting plate and that of the second rigid connecting plate. According to the invention, multi-form loading with matched temperature load and force load can be realized, and the high-temperature performance of the material can be tested.

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.

Techniques for heat exchanger networks are disclosed. In the illustrative embodiment, several heat exchangers and several components to be cooled are connected together in a network. The flow of liquid coolant to each component and heat exchanger can be individually controlled. If a particular component needs more or less cooling, the flow rate of coolant through that component can be controlled. If a first component needs more cooling and a second component can operate with less cooling, coolant may be rerouted from the first component to the second component. Thus, target temperature load balancing can be achieved for all the components of the system. If a heat exchanger is faulty, it can be isolated, and a backup heat exchanger can be brought online, making the system self-healing and fault-tolerant. The faulty heat exchanger can then be repaired or replaced while the rest of the system is operational.

This invention provides an accelerated testing platform and method for spindle precision retention based on multi-load loading, including a spindle and drive unit, a temperature load loading unit, a vibration load loading unit, and a simulated cutting load loading unit. It also provides an accelerated testing method for spindle precision retention that considers the accelerated degradation of spindle precision under the coupled effects of multiple loads such as force, heat, and vibration. This method significantly shortens the testing cycle while achieving spindle precision retention testing, and simultaneously solves problems such as missing information on the precision degradation process and imperfect quantitative evaluation methods for precision retention. It is of great significance for meeting the urgent need for rapid testing of precision spindle precision retention and for filling the gaps in the field of spindle precision retention testing.

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 relates to the technical field of fused salt storage tanks of photo-thermal power stations, in particular to improvement of the safety of a storage device. The invention discloses a storage tank safety assessment device and method based on response surface inversion, and the storage tank safety assessment method based on response surface inversion comprises the following steps: S1, calculating the temperature field distribution of a storage tank through a finite volume method temperature field simulation subsystem; s2, a finite element method stress field simulation subsystem is coupled with the temperature load in the step S1, and the stress and deformation distribution of the storage tank are calculated; s3, executing the following operations through the actual settlement inversion subsystem: acquiring real-time settlement data of a plurality of monitoring points around the bottom plate of the storage tank; setting the settlement data as an optimization target; inverting an elastic modulus parameter of ceramsite soil at the bottom of the storage tank by adopting a response surface optimization technology; the inversion parameters are fed back to the finite element method stress field simulation subsystem in the step S2 for final calculation of the stress field; and S4, performing safety early warning based on a final calculation result.

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.