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402 results about "Thermal force" patented technology
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Defect repairing method based on digital twinning and friction stir welding technology
The invention discloses a defect repair method based on digital twinning and friction stir welding technologies, and relates to the technical field of intelligent manufacturing and digital twinning, and the defect repair method comprises the following steps: synchronously capturing full-dimensional data of a welding area through a multi-mode sensor array integrated by an actuator; secondly, segmenting defect boundaries by adopting a deep learning algorithm, constructing a dynamic twin model in combination with thermal-force field coupling simulation, and accurately mapping defect three-dimensional features; generating a repair track according to the twinborn model, converting the repair track into a robot joint instruction through a curved surface parameterization mapping algorithm, and implanting real-time anti-collision constraint; in the repairing process, based on reinforcement learning control of the material rheological resistance and the temperature gradient, the rotating speed, the advancing speed and the down force of the tool are dynamically adjusted; and after repairing, micro-focus CT scanning is started immediately, actually measured data is compared with twinborn prediction, and when the deviation exceeds a threshold value, a re-repairing process is triggered automatically. The method solves the problems that a traditional method depends on manual intervention and the precision of a sensor is easily interfered by the environment.
Owner:SOUTHWEST TECHNICAL ENGINEERING RESEARCH INSTITUTE OF CHINA SOUTH IND GROUP
High-precision dynamic error real-time compensation method based on five-axis linkage
The invention discloses a high-precision dynamic error real-time compensation method based on five-axis linkage, and relates to the technical field of machine manufacturing, and the method comprises the following steps: multi-source dynamic error perception: collecting geometric errors of a machine tool through a grating ruler, collecting temperature field distribution through an infrared thermal imager, and collecting cutting force disturbance through a piezoelectric force sensor; the method comprises the steps of constructing a grating ruler, constructing a thermal infrared imager, constructing a multi-source data acquisition system, carrying out nonlinear coupling modeling, and establishing a dynamic error model based on improved Volterra series, and has the advantages that the multi-source data acquisition system is constructed through the grating ruler, the thermal infrared imager and the piezoelectric force sensor, geometric, thermal and force multi-source dynamic errors are sensed synchronously, and the dynamic error detection accuracy is improved. The nonlinear coupling characteristic of the thermal-force-geometric error is accurately quantified by combining an improved Volterra series model and Lyapunov exponent analysis, the problem that a traditional single-source error model cannot accurately describe a complex error field is solved, and the accuracy of error prediction is remarkably improved.
Owner:BIQIN AUTOMATION EQUIP (SHANGHAI) CO LTD
Rapid forming control system and control method for tempered glass production
The invention relates to the technical field of glass hot working control, and discloses a rapid prototyping control system and a rapid prototyping control method for tempered glass production. Comprising a thermal coupling module, a temperature control decision module, a flow field solving module, a photoelastic stress analysis module, a quantum annealing optimization module and a time domain synchronous control module. According to the system, a three-dimensional thermal-stress field is constructed on the basis of physical properties and thermal boundaries of glass, heating power is predicted through reinforcement learning, flow field simulation and stress image analysis are combined, control parameter self-adaptive adjustment is achieved through quantum annealing optimization, beats of all subsystems are coordinated through a synchronization module, and an efficient closed-loop control structure is formed. By introducing the quantum annealing optimization module, parameter adjustment in the control system is optimized, the technical effect of improving the precision of complex control decisions is achieved, and the optimization speed and the decision quality of the system are improved.
Owner:廖俊生
Thermal mechanical composite fatigue test equipment for turbine blade in rotating environment
ActiveCN121364073AGas-turbine engine testingJet-propulsion engine testingCombustion chamberSpray cooling
The invention belongs to the technical field of aero-engine high-temperature part test, and particularly relates to a thermal mechanical composite fatigue test device in a turbine blade rotation environment, which comprises a high-temperature gas system, a stator system, a rotor system, a support system, a test system, an auxiliary system and a turbine rotor blade test piece, the high-temperature fuel gas system is used for providing a fuel gas environment for a turbine rotor blade test piece and controlling the high-low temperature circulation state of fuel gas, a combustion chamber is arranged at the front end of the high-temperature fuel gas system and provided with a double-oil-way nozzle, a fuel gas flowing system is arranged at the rear end of the high-temperature fuel gas system, and a blade grid structure is designed for the fuel gas flowing system according to the geometrical shape of a turbine rotor blade. And a spray cooling section is arranged at the rear part of the test section. The device is composed of six core systems including a high-temperature fuel gas system, a stator system, a rotor system, a supporting system, a testing system and an auxiliary system, all the systems work cooperatively, and integrated simulation of the high-temperature fuel gas environment, rotating centrifugal loads and heat-force synchronous circulation is achieved.
Owner:SHENYANG AVIATION FUEL TECH CO LTD
Contact type thermal resistance dynamic measurement system and measurement method
The invention provides a contact type thermal resistance dynamic measurement system and a measurement method, and belongs to the technical field of thermal resistance measurement. According to the method, accurate characterization of the heat conduction characteristic of a complex interface is achieved through multi-physical field data fusion and a real-time compensation mechanism, firstly, initial reference pressure is set based on contact surface three-dimensional shape extraction and material attributes, and heat-force-flow multi-source data are synchronously collected through a multi-parameter measurement execution module; combining a weighted Kalman filtering algorithm and a phase change-seepage coupling correction model, and dynamically optimizing heat flow density data to eliminate phase change latent heat and micro-flow interference; and for abnormal fluctuation, a combined control strategy of fuzzy PID pressure regulation, high-frequency ultrasonic liquid film stabilization and porous silica gel vibration suppression is adopted, and + / -1% steady-state thermal resistance output is achieved. According to the method, cloud parameter iterative optimization and a fault self-diagnosis mechanism are integrated, and the robustness and reliability of measurement in dynamic high-noise scenes such as lithium battery pole piece expansion and geothermal wellbore unsteady-state heat transfer are remarkably improved.
Owner:ZHEJIANG SCI-TECH UNIV
Single-rod CHF test device and method
The invention discloses a single-rod CHF test device and method, and belongs to the field of thermal hydraulic tests. The single-rod CHF test device comprises a heating rod, a thermal insulation pipe and a fixed grillwork, the heating rod coaxially penetrates through the thermal insulation pipe and is radially limited by the fixed grillwork, a cooling medium is filled between the thermal insulation pipe and the heating rod, the diameter d of the heating rod and the inner diameter D of the thermal insulation pipe meet Dh = De = (D2-d2) / d, Dh is the thermal diameter corresponding to a simulated fuel rod, and De is the thermal diameter corresponding to the simulated fuel rod. De is the hydraulic diameter corresponding to the simulated fuel rod. According to the device, the thermal hydraulic characteristics of the full-length rod bundle fuel can be accurately simulated through the single heating rod, the cost of a CHF test is effectively reduced, and the test efficiency is improved.
Owner:SHANGHAI NUCLEAR ENGINEERING RESEARCH & DESIGN INSTITUTE CO LTD
Internal combustion engine thermal characteristic virtual sensing method
The invention discloses a virtual sensing method for thermal characteristics of an internal combustion engine. The method comprises the following steps: S1, acquiring temperature distribution data; s2, time sequence temperature data mapping; s3, acquiring fusion temperature data; s4, obtaining thermal characteristics; and S5, abnormal judgment of a combustion chamber, an exhaust pipeline and a cooling system. According to the method, the comprehensiveness and the accuracy of thermal state analysis are remarkably improved by constructing a global sensing system of a three-dimensional space temperature field of the internal combustion engine and combining a multi-source sensor collaborative acquisition and deep learning feature fusion mechanism. Through closed-loop coupling of time-space sequence temperature data and a thermodynamic mechanism model, quantitative correlation between thermal characteristics and combustion efficiency, heat energy loss and cooling efficiency core performance parameters is established. According to the LSTM-CNN-MLP collaborative framework, the spatio-temporal evolution law of a temperature field is extracted in a self-adaptive mode, and the robustness of thermodynamic state perception is remarkably enhanced.
Owner:GUANGXI UNIV +1
Porcelain insulator quality evaluation system based on multi-physics field coupling analysis
The invention provides a porcelain insulator quality evaluation system based on multi-physics field coupling analysis, and relates to the technical field of rod-column porcelain insulator data processing.The porcelain insulator quality evaluation system adopts an electricity-heat-force multi-physics field joint simulation model to comprehensively reflect the heat accumulation and stress deformation effect caused by electric field concentration; an electric field concentration coefficient, a temperature rise trend coefficient and a stress gradient coefficient at a sharp point can be accurately captured, and degradation path prediction in a real operation environment is formed; according to the technology, the thread coupling abnormal index F alpha i of the ith rod-type column porcelain insulator is constructed, whether the thread structure has the risk of partial discharge, flashover or breakdown or not can be dynamically evaluated, and by introducing equivalent dielectric layer simulation of various environmental media, the simulation of the influence of various pollutants, attachments and climates on electric field concentration in reality is promoted; quantitative evaluation of the corona discharge risk of the sharp point is realized, and the reliability of the structural design of the insulator is promoted and improved.
Owner:LIAONING NORTH ELECTRIC PORCELAIN CO LTD
Thermal-mechanical-metallurgical coupling numerical simulation method for low alloy steel welding and additive manufacturing
PendingCN121052035ADesign optimisation/simulationConstraint-based CADHeat-affected zoneThermal force
The invention discloses a thermal-mechanical-metallurgical coupling numerical simulation method for low alloy steel welding and additive manufacturing, which comprises the following steps of: S1, constructing a three-dimensional model of a test piece according to the geometric size and the size of a heat affected zone of the test piece after welding or additive manufacturing, performing grid division to form grid units, and endowing the grid units with material attributes; s2, endowing the grid units with thermophysical attributes, introducing an external heat source model, solving the change of a temperature field along with time by using a finite element method until all the grid units are cooled to a set environment temperature, and exporting a temperature field model; s3, simulating a phase change process under any thermal process; and S4, calculating a stress-strain field and a displacement field by taking the temperature field model in the step S2 and the phase fraction model in the step S3 as driving external force. The temperature, phase fraction, stress-strain and displacement changes in the low alloy steel welding and additive manufacturing process can be predicted and analyzed faster and more comprehensively, the design period is shortened, and the economical efficiency of the implementation process is promoted.
Owner:JURASSIC MARKREWEI EQUIP TECH CO LTD
Corrosion product deposition behavior numerical simulation analysis method and related device
The invention relates to a corrosion product deposition behavior numerical simulation analysis method and a related device, which are applied to a heat exchanger of a nuclear power plant residual heat removal system, and the method comprises the following steps: S1, establishing a three-dimensional geometric model corresponding to the heat exchanger based on a CFD platform; s2, performing grid division on the three-dimensional geometric model, setting boundary conditions and initial conditions of the three-dimensional geometric model, and establishing a thermal hydraulic model corresponding to the three-dimensional geometric model according to the grid division, the boundary conditions and the initial conditions; s3, calculating the thermal hydraulic model based on a FLUENT platform to obtain a temperature calculation result of a preset position of the heat exchanger; and S4, when the temperature calculation result meets the design value requirement, a corrosion product deposition and migration coupling model corresponding to the heat exchanger is established, and a sediment distribution result corresponding to the heat exchanger is calculated through the corrosion product deposition and migration coupling model based on the thermal hydraulic model. The method can predict the influence of corrosion product migration and deposition on the thermal performance of the heat exchanger.
Owner:SUZHOU NUCLEAR POWER RES INST CO LTD +1
Connecting device with function of dynamically adjusting clamping force
PendingCN120895918ACoupling device detailsClamped/spring connectionsThermal forceMonitoring and control
Owner:NINGDONG POWER SUPPLY COMPANY OF STATE GRID NINGXIA ELECTRIC POWER
Thermodynamic system of coupling back pressure turbine for wide-load peak regulation
The utility model relates to the technical field of steam turbines, and discloses a thermodynamic system of a coupling back pressure turbine for wide-load peak regulation, which is provided with a boiler, a back pressure turbine, a high-pressure cylinder, an intermediate-pressure cylinder, a low-pressure cylinder, a generator and a recovery mechanism, the boiler is respectively connected with the back pressure machine, the high-pressure cylinder and the intermediate-pressure cylinder; the back pressure machine is connected with the high-pressure cylinder; the medium-pressure cylinder is connected with the low-pressure cylinder; the low-pressure cylinder is connected with the generator; the recycling mechanism is connected with the low-pressure cylinder and the boiler and used for condensing steam discharged by the low-pressure cylinder and recycling and conveying the steam to the boiler. In a high-load operation state, the thermodynamic system, the back pressure turbine and the high-pressure cylinder operate in parallel, and the boiler conveys steam to the back pressure turbine and the high-pressure cylinder. In the thermodynamic system in a low-load operation state, the back pressure machine and the high-pressure cylinder are connected in series for operation, the boiler conveys steam to the back pressure machine, and the back pressure machine conveys steam to the high-pressure cylinder. According to the utility model, the pressure of steam entering the steam turbine during low-load operation can be improved, and the feed water temperature and the operation economy can be improved.
Owner:DONGFANG TURBINE CO LTD
Building heat emission model modeling method and device, terminal and medium
ActiveCN120634777AData processing applicationsComplex mathematical operationsComputational simulationDensity of air
The invention discloses a building heat emission model modeling method and device, a terminal and a medium, and the method comprises the steps: firstly collecting building structure data and heat emission environment data of a target area, calculating artificial emission heat emitted by an air conditioner outdoor unit assembled on a building through an enthalpy difference method, and superposing the artificial emission heat to obtain dynamic heat emission data; dividing a heat storage space by taking an air conditioner position as an original point, and establishing a temperature change calculation formula in combination with a wind speed condition to calculate air flux change caused by a hot-pressing effect; thirdly, layering the urban canopies according to the vertical height, calculating the hot pressure difference formed by the air density difference of each layer, and constructing an interlayer heat transfer relationship; finally, integration of the coupling relation between the temperature rise data of the heat storage space and the thermal layer is achieved, the heat emission distribution and the temperature rise trend of the building in the target area under different wind speed conditions are simulated, and the technical problem that an existing heat emission temperature rise calculation simulation method is large in calculation error is solved.
Owner:GUANGDONG UNIV OF TECH
Processing detection system and detection device for hydraulic shaft sleeve
The invention relates to the field of precision machining detection, and discloses a hydraulic shaft sleeve machining detection system and detection device which comprises a pneumatic servo control module, a signal collecting and processing module and a thermal inversion calculation module. The pneumatic servo control module drives the overturning air cylinder to apply a composite pressure waveform containing a static reference and a periodic flutter component to the hydraulic sleeve; the signal acquisition and processing module performs frequency domain analysis on a displacement signal detected by the displacement sensor and separates average displacement and displacement amplitude; the thermal inversion calculation module calculates real-time dynamic stiffness according to the displacement amplitude, a material stiffness thermal softening model is used for reversely deducing a temperature rise value, thermal expansion and elastic deformation errors are stripped through multi-dimensional error decoupling operation, and real height data under the standard temperature and without external force are calculated. According to the invention, active excitation and frequency domain analysis technologies are utilized, so that the interference of an oil film and thermal deformation is effectively solved, and high-precision online detection and processing compensation of a thermal-state workpiece are realized.
Owner:ZHEJIANG HIGWAY HYDRAULIC TECH CO LTD
Intelligent path planning system and optimization method for large structure robot welding
PendingCN120985664AProgramme-controlled manipulatorWelding/cutting auxillary devicesMachineVisual perception
The invention relates to the technical field of robot welding, in particular to an intelligent path planning system and optimization method for large structure robot welding, by collecting three-dimensional point cloud data of a workpiece and temperature field and stress field data in the welding process, a geometry-heat-force multi-field coupling model is established, and a machine learning algorithm is adopted for parameter correction; based on the model, a deep learning network is adopted to identify welding seam topological features and generate a path constraint parameter set; welding path nodes are optimized by using a hybrid optimization strategy of reinforcement learning and a multi-target genetic algorithm; monitoring the shape of a molten pool through a visual sensing system, and dynamically adjusting welding parameters in combination with a model predictive control algorithm; a distributed model predictive control algorithm is adopted to coordinate the motion trails of the multiple robots; and finally, constructing a welding process knowledge graph to realize continuous optimization of the system. The problems of inaccurate welding deformation prediction and poor path planning adaptability in the prior art are solved, and the welding quality and the production efficiency of the large structural part are remarkably improved.
Owner:HARBIN ELECTRIC MACHINERY FACTORY (ZHENJIANG) CO LTD
Performance-based fire-resistant design method for cable system of large-span suspension bridge
The invention discloses a performance-based fire-resistant design method for a cable system of a large-span suspension bridge. The method comprises the steps of bridge fire-resistant category division, fire intensity division, fire-resistant target determination, adverse fire scene determination, fire response calculation, fire-resistant checking calculation, fire-resistant protection and the like. The bridge fire-resistant category, the fire intensity, the fire-resistant performance and the fire-resistant target are all divided into three levels. The adverse fire scene is determined based on the fire type, fire combustion mode, fire position, wind speed and wind direction influence and combined with the structure stress state; fire response is calculated through thermal-mechanical coupling by adopting a finite element method; the fire-resistant checking calculation can adopt a design method based on overall structure fire-resistant checking calculation or component fire-resistant checking calculation; and when the fire-resistant checking calculation of each component of the cable system does not meet the fire-resistant target, fire-resistant protection design is carried out, and a fire-resistant protection scheme is designed by combining tests and numerical simulation. The fire-resistant design method based on the performance of the suspension bridge cable system is constructed, and reference can be provided for fire-resistant design of the suspension bridge.
Owner:NANJING TECH UNIV
Multi-physical-field intelligent optimization system and method for low-thermal-resistance stacked electrode packaging
PendingCN121525605AComputer aided designSpecial data processing applicationsData acquisitionClosed loop
The invention discloses a multi-physical-field intelligent optimization system and method for low-thermal-resistance stacked electrode packaging, and relates to the technical field of packaging thermal management. According to the system, a thermal, mechanical and electric multi-physics field coupling model of the stacked electrode packaging structure is established in a unified computational domain through a modeling module; the measurement module collects thermal resistance, thermal conductivity and interface stress data in real time through an integrated sensor; the self-correction optimization module executes a self-adaptive residual iterative algorithm based on the deviation between the model simulation result and the actually measured data, corrects model parameters and generates process control variables; and the process regulation and control module dynamically adjusts the sintering temperature, the coating thickness and the pressing pressure according to the control variables and feeds back updated data to form closed-loop optimization. According to the method, collaborative operation of modeling, measurement, optimization and process regulation and control is realized, dynamic self-correction of multi-physical field parameters and process adaptive optimization can be realized in the packaging operation process, the interface thermal resistance is remarkably reduced, and the heat-conducting property and the structural stability are improved.
Owner:YANGZHOU JIANGXIN ELECTRONICS CO LTD
Electromagnetic-thermal-mechanical full-coupling simulation design method and system for SiC controller
The invention provides a SiC controller electromagnetic-thermal-force full-coupling simulation design method and system, and belongs to the technical field of power electronic device simulation design, and the method comprises the steps: constructing a bidirectional real-time coupling model of an electromagnetic field, a thermal field and a mechanical stress field; the irradiation dose is determined based on the expected working environment of the SiC controller, irradiation damage factors are introduced to correct SiC material parameters, and a bidirectional real-time coupling model is input; different temperature conditions and stress conditions are input into the bidirectional real-time coupling model for multi-working-condition simulation, performance parameters of the SiC material are output, and a quantitative relation model of the performance parameters, the temperature and the stress is established to reveal the performance degradation law of the SiC material; and based on the bidirectional real-time coupling model and the performance degradation law of the SiC material, taking the switching loss and the temperature rise as optimization targets, and carrying out collaborative optimization on parameters of the SiC controller. The simulation precision is improved, the performance of the SiC controller is optimized, the reliability is improved, and the service life is prolonged.
Owner:SINO TRUK JINAN POWER CO LTD
Damage-considered solder bump viscoplastic constitutive model establishing method
PendingCN120524750AMaterial strength using tensile/compressive forcesDesign optimisation/simulationElement modelThermal force
The invention relates to a method for establishing a viscoplastic constitutive model of a solder bump considering damage. Comprising the following steps: performing a uniaxial tension and compression test on a solder bump sample to obtain a macroscopic stress-strain curve of the sample; a unit cube finite element model is established, the unit cube finite element model adopts the solder constitutive model constructed in the step (2), loads are set for the model for numerical simulation, and a stress-strain curve calculated by the model is obtained; and fitting the stress-strain curve obtained by simulation in the step (3) with the macroscopic stress-strain curve obtained by the tension and compression test in the step (1) through a test parameter method, and determining parameters of the solder constitutive model, so that the final solder bump viscoplastic constitutive model considering the damage is established. The method can accurately predict the deformation and other mechanical behaviors of the solder under the thermal-force loading condition, and can be widely applied to fatigue life prediction and reliability evaluation of the electronic packaging structure.
Owner:NANJING UNIV OF SCI & TECH
Molten pool dynamic simulation model and system for simulating laser drilling based on level-set method
PendingCN120781592ADesign optimisation/simulationSpecial data processing applicationsMathematical modelDynamic monitoring
The invention provides a molten pool dynamic simulation model and system for simulating laser drilling based on a level-set method, and the model comprises a two-dimensional molten pool simulation model which comprises heat transfer-laminar flow (two-phase flow) and level-set physical field coupling; on the basis of the confirmed implementation process parameters and material physical property parameters, a molten pool interface simulation metallographic phase under given process operation is compared with an actual metallographic phase, and a heat transfer mathematical model in the laser drilling process is obtained through simulation confirmation; and the three-dimensional thermal-mechanical coupling model is constructed based on a heat transfer mathematical model and further coupled with a solid mechanical physical field, so that temperature distribution and stress distribution at the welding printing position in the laser drilling process are obtained through simulation. The technical problems that in an existing laser drilling welding technology, parameter debugging depends on experience, dynamic monitoring of a molten pool is difficult, and thermal stress prediction means are lacked can be effectively solved, and powerful theoretical support and data basis are provided for optimizing the welding technology and improving the welding quality.
Owner:JIANGSU RELIANCE ENERGY TECHNOLOGY CO LTD
A cooling tower adaptive air intake regulation system and method coupled with flow guiding energy saving
An adaptive air intake control system and method for cooling towers, coupled with airflow diversion for energy saving, belongs to the field of adaptive control system technology. The system includes an information acquisition unit, an execution unit, and an adaptive control unit. The information acquisition unit collects environmental wind parameters and key operating parameters in real time. The execution unit includes multiple independent fan blade groups with circumferential partitioning and vertical layering for precise execution of commands. The adaptive control unit executes operational decisions, selecting the dominant operating mode from airflow diversion energy saving, anti-freezing energy saving, and anti-drip energy saving modes; it then identifies and outputs wind condition characteristics and thermal anomaly indicators through key parameter status identification, and generates control commands based on the adaptive control strategy and command generation. The system forms a closed loop, capable of adaptively adjusting the identification model and control strategy based on feedback. A corresponding control method is also disclosed, enabling intelligent and precise control of air intake in cooling towers under complex environments, improving cooling efficiency and energy saving while ensuring anti-freezing safety.
Owner:济南蓝辰能源技术有限公司
Thermal power plant deep peak regulation system and method utilizing high-temperature heat storage energy
The invention discloses a thermal power plant deep peak regulation system and method utilizing high-temperature heat storage energy, and belongs to the field of coupling of industrial high-temperature heat storage energy and thermal power plant deep peak regulation. The system comprises a heating unit which is connected with an electric energy conversion and supply unit and / or a heat energy transfer and storage unit so as to convert electric energy or steam heat energy into heat storage energy of heat storage particles; the heat storage unit is used for storing the high-temperature heat storage particles conveyed by the heating unit; the heat release unit is used for receiving the high-temperature heat storage particles conveyed by the heat storage unit; wherein the heat release unit is a fluidized bed boiler in a thermodynamic system of a thermal power plant, so that heat storage energy of the heat storage particles is transmitted to the original thermodynamic system of the thermal power plant, and deep peak regulation of the thermal power plant is realized through overheating thermal power generation with rated parameters generated by the thermodynamic system. By means of the system, the problem that in the deep peak regulation process of an existing thermal power plant, a thermodynamic system of the thermal power plant and an industrial solid-state high-temperature heat energy storage technology are not coupled is solved.
Owner:ORDOS LABORATORY +1
Hybrid aircraft power plant and gearbox therefor
The hybrid aircraft power plant can have an output shaft connectable to a load, the output shaft rotatable about an axis; a thermal engine having a thermal engine shaft coaxial with the output shaft; an electric motor having a rotor shaft coaxial with the output shaft; a first clutch operable to engage the thermal engine shaft with the output shaft; a second clutch operable to engage the rotor shaft with the output shaft; a third clutch operable to engage the thermal engine shaft with the rotor shaft; the first clutch, second clutch and third clutch disposed axially between the electric motor and the thermal engine, relative to the axis.
Owner:PRATT & WHITNEY CANADA CORP
Intelligent construction site environment quality real-time regulation and control method and system
The invention discloses an intelligent construction site environment quality real-time regulation and control method and system, and relates to the technical field of intelligent construction site environment regulation and control. Continuous frame thermodynamic images of a construction area are collected, a heat source area H and a low-temperature area C are identified, an ultrasonic anemograph is combined, environment data of the construction area are obtained, a normalized data set S is constructed, and a normalized data set is obtained; constructing a thermal field stability index Wd according to the normalized data set S, further calculating a thermal field stability index difference value delta Wd, evaluating a thermal field stable state, constructing a thermal energy diffusion path and a path diffusion response factor Lj of the thermal energy diffusion path when the construction area is in an abnormal state, screening a risk path, and performing thermal energy conduction evaluation on the risk path to obtain a thermal energy conduction evaluation result. And the adaptation level of the heat energy diffusion path and the air supply equipment is judged, a heat energy conduction adjusting measure is generated, and the construction site environment is adjusted, so that the accuracy and intelligence of environment regulation and control and the system response efficiency are improved.
Owner:CHANGZHOU DONGHUA CONSTR & INSTALLATION ENG CO
Fire resistance real-time evaluation system and method based on steel structure
The invention relates to the technical field of structural engineering safety monitoring, in particular to a fire resistance real-time evaluation system and method based on a steel structure, and the method comprises the steps: collecting the surface radiation energy of the steel structure through a distributed thermal infrared imager array, and constructing a millimeter-level precision three-dimensional temperature field distribution diagram in combination with an environment temperature compensation algorithm; inputting the temperature field into the phase change correction model, and dynamically calculating a yield strength attenuation coefficient and an elastic modulus reduction coefficient; constructing a thermal-mechanical coupling nonlinear finite element model based on the degradation parameters, iteratively solving the displacement and stress response of the structure under the fire load action by adopting an arc length method, and extracting a buckling critical load spectrum; and according to the ratio of the real-time fire load to the critical load, a fire-resistant safety level signal is generated, and a graded early warning instruction is triggered. According to the invention, thermal-force response whole-process monitoring and intelligent early warning of the steel structure in a fire disaster can be realized, and the system has high spatial resolution, high physical coupling and multi-level response capability.
Owner:NANJING COMM INST OF TECH +1
Method and system for designing steel sealing layer of compressed air energy storage underground artificial reservoir based on isogeometric phase field method
PendingCN120372755AGeometric CADDesign optimisation/simulationWelding residual stressStatistical analysis
The invention discloses a design method and system for a steel sealing layer of a compressed air energy storage underground artificial reservoir based on an isogeometric phase field method, and the method comprises the steps: building a coupling model of air thermodynamics in the reservoir and heat conduction of a wall medium, and carrying out the simulation calculation of the changes of temperature and pressure in the reservoir in the process of inflation-gas storage-deflation-gas storage; establishing a phase field model for thermal coupling fatigue failure analysis of the steel sealing layer, the concrete lining and the surrounding rock; constructing an isogeometric four-order phase field method calculation model for the fatigue failure analysis of the block type steel sealing layer, and performing numerical simulation based on the influence of a block type layout mode, a welding mode, welding defects and welding residual stress of the steel sealing layer on the fatigue failure of the steel sealing layer; and carrying out statistical analysis on a numerical simulation result, and determining a layout method and a welding mode of the steel sealing layer. According to the method, a new thought is provided for design of the steel sealing layer of the compressed air energy storage underground artificial cave depot, and the method assists in solving the electricity abandoning problem of new energy through the CAES technology.
Owner:HOHAI UNIV
Numerical simulation method for solid propellant grain cutting treatment
The invention relates to the crossing field of computer simulation and aerospace propulsion technology, and discloses a numerical simulation method for solid propellant grain cutting treatment, which comprises the following steps: establishing a three-dimensional model of a grain and a cutting tool, and defining a heat-force-damage coupling constitutive relation and boundary conditions; performing multi-physical field monitoring based on the weighted combination of the equivalent plastic strain, the temperature and the damage gradient at each time step; dynamically executing self-adaptive encryption and coarsening of the grid; in combination with dynamic load balancing in parallel computing, the resource utilization rate is increased; and material separation is simulated through a damage fracture criterion, and finally high-precision cutting force, a temperature field, a stress-strain field and a cutting morphology are output. According to the method, the simulation precision and efficiency are improved, and reliable support is provided for process optimization and safety evaluation.
Owner:SHENZHEN HUALONG ZHICHUANG TECHNOLOGY CO LTD
Motorized spindle thermal characteristic analysis modeling method based on multi-patch isogeometric analysis
The invention discloses a motorized spindle thermal characteristic analysis modeling method based on multi-patch isogeometric analysis, which comprises the following steps: S10, carrying out geometric modeling of a high-speed motorized spindle: constructing a multi-patch solid model comprising a motorized spindle stator, a rotor, a bearing and a cooling pipeline of the high-speed motorized spindle by adopting a three-dimensional NURBS patch splicing technology, geometric continuity and parameterization consistency are ensured; s20, performing heat conduction analysis: constructing a transient heat conduction control equation based on a Fourier heat conduction differential equation in combination with high-order smoothness characteristics of the IGA, and solving a temperature evolution process in a time domain through a backward difference method; and S30, performing thermal error modeling: introducing an elastic mechanical constitutive relation and a fixed support boundary, and establishing a thermal-force coupling solving framework.
Owner:NINGBO UNIV
Fatigue life analysis method of wind power main bearing based on thermal-mechanical coupling
The invention belongs to the field of failure analysis of bearings, and discloses a fatigue life analysis method of a wind power main bearing based on thermal-mechanical coupling. In order to consider the influence of pre-tightening on the service life of the bearing, the method takes the pre-tightening force of the bearing as a starting point, and gradually establishes a relational expression between pre-tightening and a series of static characteristics such as contact deformation, contact load, fatigue life and the like by utilizing an analytical method; meanwhile, the friction torque is introduced, the finite element analysis method is used for solving the influence of thermal deformation on the static characteristics of the bearing, the influence is substituted into the static characteristic relational expression, and finally the service life analysis method of the bearing based on thermal-mechanical coupling is achieved. Compared with the conventional service life analysis method, the fatigue service life analysis method disclosed by the invention has the advantages that the thermal deformation of the bearing caused by friction is additionally considered, so that the analysis is more comprehensive, and the precision of the service life analysis of the bearing is further improved.
Owner:DALIAN UNIV OF TECH
Spray cooling intelligent management and control system optimization algorithm for 330MW cogeneration unit
The invention discloses a spray cooling intelligent management and control system optimization algorithm for a 330MW cogeneration unit, and relates to the technical field of thermal equipment cooling, and the algorithm comprises the steps: obtaining unit operation parameters, environment meteorological data, a spray system state and resource price information, and forming multi-source synchronous input data; on the basis of multi-source synchronous input data, feasibility judgment is carried out according to preset temperature, load and water source conditions, and a spraying enable signal is output; based on historical unit operation data, optimizing a time sequence prediction model constructed by hyper-parameters through a genetic algorithm, in response to the spray enable signal, performing rolling prediction on the saturation temperature of the condenser by using the time sequence prediction model in combination with a candidate spray strategy to obtain a temperature change sequence; according to the temperature change sequence, power generation benefit increment is calculated in combination with thermal characteristics of the steam turbine, spraying energy consumption and water consumption cost are deducted, and an optimization function is constructed; on the basis of the optimization function, supercooling prevention, condensation prevention, amplitude limiting execution and water source total amount limitation are embedded as hard constraint conditions.
Owner:HUADIAN XINJIANG POWER CO LTD +1