574 results about "Thermal simulation" patented technology

A method is provided for facilitating installation of one or more electronics racks within a data center. The method includes: placing a plurality of thermal simulators in the data center in a data center layout to establish a thermally simulated data center, each thermal simulator simulating at least one of airflow intake or heated airflow exhaust of a respective electronics rack of a plurality of electronics racks to be installed in the data center; monitoring temperature within the thermally simulated data center at multiple locations, and verifying the data center layout if measured temperatures are within respective acceptable temperature ranges for the data center when containing the plurality of electronics racks; and establishing the plurality of electronics racks within the data center using the verified data center layout, the establishing including at least one of reconfiguring or replacing each thermal simulator with a respective electronics rack.

A method and apparatus for thermally simulating a circuit over a network is provided. Techniques are provided for designing a circuit that satisfies user-specified functional requirements received over a network. Based on the specified requirements, components and a topology for constructing the circuit are automatically determined. The components determined during this operation have operational values such that, when the components are arranged according to the topology to form the circuit, the circuit satisfies the user-specified functional requirements. One or more web pages that identify the components are then delivered to the browser over the network. The component and topology information may be used to generate a schematic diagram that is delivered in a web page to the user over the network. The user may thermally simulate the designed circuit. Many characteristics of the board may be adjusted to provide an accurate thermal simulation. The user may place an order over the network for one of the components, a kit of all of the components, a custom made circuit made from the components, and / or a prefabricated circuit that is functionally similar to the one that was designed.

The invention relates to an establishment method for hydrocarbon source rock hydrocarbon production rate charts in petroleum resource assessment. The establishment method includes the steps of 1), collecting experimental samples and determining thermal simulation experiment data through experiments; 2), collecting materials; 3), calibrating kerogen generated oil, generated gas and oil-cracking gas kinetic parameters; 4), establishing sedimentary burial history and thermal-history models of hydrocarbon source rocks on a target stratum of a research area; 5), establishing constraint condition of hydrocarbon source rock hydrocarbon production rate; 6), establishing kerogen generated oil, kerogen generated gas, oil generated gas, clean and total gas conversion profile charts on the target stratum of the research area; 7), checking whether dynamics geological extrapolation results meet requirements or not; 8), putting forwards part of hydrocarbon expulsion mode adjustment coefficients, evaluating hydrocarbon production rate curves of the partial hydrocarbon expulsion model, and establishing the hydrocarbon source rock hydrocarbon production rate charts including three modes, namely the mode of complete hydrocarbon expulsion, the mode of partial hydrocarbon expulsion and the mode of no hydrocarbon expulsion. The shortcoming in an original calculating method and experiment simulated data of the hydrocarbon source rock hydrocarbon production rate is overcome, and the hydrocarbon source rock hydrocarbon production rate at the target stratum can be accurately and reasonably determined according to oil field exploration practice by oil field workers.

A PoF based method for calculating mission reliability of an electronic product comprises steps as follows: step one, information of all mission profiles of the product is collected, and an environment profile of each mission is determined; step two, thermal simulation and vibration simulation of environmental stress of each mission are performed, and a local response of the product to an environmental load is obtained; step three, a product simulation model is established; step four, simulation calculation of the product in all the mission profiles is completed, and the mean time to failure and a main failure mechanism of the product are obtained; and step five, the mission reliability of the product is calculated according to the mean time to failure. According to the PoF based method for calculating the mission reliability of the electronic product, all missions of the product during lifetime use are considered, the environmental stress of each mission is simulated, and the mean time to failure and the mission reliability of the product are comprehensively calculated. By means of a PoF model, the direction relation between parameters of a product material, structure, process and the like and the reliability can be obtained, and a design improvement direction is clearly and directly provided for the product.

The invention discloses a shale organic porosity detection method, and belongs to the technical field of petroleum, geology and mining exploration and development. The shale organic porosity detection method comprises the steps of calculating chemical kinetic parameters of petroleum formation from kerogen, gas formation from kerogen and gas formation from crude oil pyrolysis by utilizing a chemical kinetic method based on the thermal simulation experiment of a shale sample and a crude oil sample with representativeness, and determining the conversion rate of the petroleum formation from kerogen, gas formation from kerogen and gas formation from crude oil pyrolysis of shale at the study layer section by combining with the burial history and thermal history of a target layer; recovering the original hydrogen index and the original organic carbon of shale of the target layer by utilizing residual hydrogen index and data of residual organic carbon of shale of the target layer and combining with the conversion rate of the petroleum formation from kerogen, gas formation from kerogen and gas formation from crude oil pyrolysis; analyzing the organic pore compressibility of shale by utilizing a Ar ion polishing thin sheet of a shale sample of the target layer; calculating the organic porosity of the shale sample of the target layer section. The shale organic porosity detection method has the effects that the organic porosity of the reservoir of shale can be calculated, and the shale organic porosity detection method is high in calculation accuracy, and is easy to operate.

The invention of novel methods is described for efficient and accurate thermal simulation of a structure that can be primarily constructed using building blocks. These structures may include, but not limited to, semiconductor chips, photovoltaic / solar panels, battery packs, etc. The methods are formulated in hierarchical function spaces, rather than the physical space and provide three-dimensional (3D) steady-state and transient temperature profiles of the structure, which are as detailed as full-scale numerical simulation, using substantially less computational degrees-of-freedom (DOF). The number of DOF required is comparable to that of lumped thermal models, yet no ad-hoc modeling assumptions related to geometry, dimensions, temperature profiles, or heat flow paths are required. The methods can be applied to evaluate temperature profiles at different levels of granularity. The methods can also be implemented in various computer-aided-design (CAD) or electronic-design-automation (EDA) tools for different technologies to perform electro-thermal simulations.

The present invention relates to a method for predicting hot-rolled Nb-contained band steel tissue and mechanical performance. Said method is characterized by that it uses physical metallurgical model as basis, adopts a method of making thermal simulation experiment be combined with industrial production actually-measured data analysis, creates mathematical models for hot-rolled Nb-contained band steel tissue and mechanical performance, including temperature model, austenite recrystallization model on the hot-rolling line, phase change model in cooling process and tissue and performance relationship model and selects VB language to originate predictive software for hot-rolled Nb-contained band steel tissue and mechanical performance.

The invention discloses a thermal simulation analysis method of a lithium ion battery of a multi-layer flaky structure. The method includes the steps of (1) preparing a battery sample and measuring electrical property data at different environment temperatures, (2) building a finite element battery solid model of a multi-layer structure and carrying out mesh dividing, (3) carrying out material property endowment and adding boundary conditions and initializing conditions of the finite element battery model, and (4) putting a battery in a heat-insulated environment and carrying out a heating experiment and a discharging experiment to achieve key parameter revision and calculation result verification of a thermal simulation analysis model. According to the thermal simulation analysis method of the lithium ion battery of the multi-layer flaky structure, experimenting and finite element modeling are organically combined, by means of a parametric model mode, every diaphragm, positive and negative pole active substance layers and a metal foil layer of the finite element model are all available, experiment results can be used for revising calculation results, and accordingly calculation precision is further guaranteed.

The invention provides an electro-thermal simulation method for FS (Field Stop) type IGBT (Insulated Gate Bipolar Transistor) transient temperature characteristic. An FS type IGBT switching transient working process is actually tested and is analyzed by being combined with an IGBT working principle and a semiconductor physical principle to determine that the IGBT transient temperature characteristic is mainly influenced by life of internal excess carrier, so that the electro-thermal simulation method is established. The method comprises the following steps of: actually testing carrier life values extracted at different temperatures to acquire a relational expression of the carrier life and temperature; calculating through an empirical value formula to acquire a relational expression amongthreshold voltage, transconductance, emitter saturation and current as well as the temperature; and adding temperature related parameters into an FS type IGBT current tailing stage current analyticalexpression and a switching transient model equation set and calculating to acquire transient working waveform of the FS type IGBT at different temperatures. The electro-thermal model simulation method provided by the invention simultaneously has the advantages of simple parameter calculation and high accuracy.

Provided is a method for multi-geological factor quantitative evaluation of hydrocarbon expulsion efficiency, which belongs to the technical field of evaluation and analysis of oil and gas resources. The method comprises: establishing a light hydrocarbon recovery factor model, so as to reduce light hydrocarbon loss in a hydrocarbon generation and expulsion thermal simulation test; in addition, accurately evaluating hydrocarbon expulsion efficiency of typical wells in combination with a hydrocarbon generation potential method and a practically measured value of hydrocarbon generation and expulsion; screening out factors influencing hydrocarbon expulsion efficiency: 1) comprehensively considering internal factors and external factors influencing hydrocarbon expulsion efficiency; 2) screening out four geological factors: organic matter abundance, an organic matter type, organic matter maturity and a source-reservoir configuration relationship; 3) establishing a model relationship between a single geological factor and hydrocarbon expulsion efficiency, and a model relationship between multiple geological factors and hydrocarbon expulsion efficiency; and 4) popularizing and applying an evaluation model for multi-geological factor quantitative evaluation of hydrocarbon expulsion efficiency on the plane, so as to obtain a plane distribution diagram of hydrocarbon expulsion efficiency of hydrocarbon source rocks by evaluation, explain distribution characteristics of conventional and unconventional oil and gas, and point out conventional and unconventional oil and gas enrichment regions.

The invention discloses a method for detecting the texture performance of a thermal simulation experiment material and belongs to the field of material detection. The method comprises the following steps of making a cylindrical sample by the material in a thermal simulation experiment, putting the cylindrical sample into a thermal simulation experiment machine, controlling the axial temperature gradient of the sample to obtain a uniform temperature zone in the middle of the sample, and carrying out controlled deformation and controlled cooling on the uniform temperature zone, wherein the length of the cylindrical sample is L0, the diameter of the cylindrical sample is d0, the length of the uniform temperature zone is l0, and the middle part of the sample is in a drum shape after the experiment. According to the method, the sample after the experiment can be made into detection samples such as a metallographic phase sample, a stretching sample and an impact sample, so that the texture characteristics of the material can be observed under different process conditions, and the strength, rigidity and ductility-toughness indexes of the material can be detected as well; the problems that the strength and ductility-toughness indexes of the material are difficult to measure after the thermal simulation experiment can be solved, and the accurate and reliable method is provided for the material research and the hot-machining process formulation.

The invention discloses an in-situ thermal simulation analysis method of a battery cell in a lithium ion battery pack system. The in-situ thermal simulation analysis method comprises the following steps: 1, establishing a thermal simulation analysis model of the lithium ion battery pack system and realizing numerical calculation; 2, extracting boundary conditions required by the battery cell and structural entity and stimulation around the battery cell aiming at the thermal simulation analysis model of the lithium ion battery pack system and calculated result of the model; 3, establishing a thermal simulation model of the battery cell, and using extracted heat transfer condition information as loading and boundary conditions of the thermal simulation model of the battery cell, and meanwhile supplementing specific detail structure of the core inside the battery cell for thermal simulation analysis of the battery cell. Through the loading and boundary conditions in the thermal simulation model of the battery cell, supplementation of the specific detail structure of the core inside the battery cell is combined with remodeling means, so that abundant and accurate thermal property at the interior of the battery cell under specific working environment and working condition of the battery cell in a lithium ion battery pack system can be furthest given out.

The invention provides a quantitative evaluation method for hydrocarbon generation quantity, hydrocarbon expulsion quantity and hydrocarbon retention quantity of source rock. The quantitative evaluation method comprises the following steps that TOC (Total Organic Carbon) of a source rock sample of a research region target layer is acquired; thermal simulation experiments are performed on the source rock sample of the research region target layer; the thermal simulation experiments are a set of semi-opened system simulation experiments of hydrocarbon generation and expulsion with different preset temperatures; the preset temperatures are temperature rising end points of the simulation experiments of the hydrocarbon generation and expulsion; a first parameter at different preset temperature is acquired according to the result of each semi-opened system simulation experiment of the hydrocarbon generation and expulsion; a first model and a second model are built according to the TOC of the source rock sample and the first parameter; the hydrocarbon generation quantity, the hydrocarbon expulsion quantity and the hydrocarbon retention quantity of the source rock are quantitatively evaluated by means of combining the first model and the second model.

The invention discloses an experimental method of organic acid generation and an erosion effect of the organic acid on a tight oil reservoir. The experimental contents include (1) a hot simulation experiment for proportioning kerogen and a clay mineral to form a sample and generating an organic acid; (2) a hot simulation experiment for generating the organic acid by virtue of thermal evolution of shale; (3) a hot simulation experiment for the erosion effect of the organic acid on tight sandstone and monomineral; and (4) a hot simulation experiment for artificially proportioning the sample. The mechanism and influence factors of the development of the tight reservoir, especially erosion pores of the shale reservoir can be clarified by analyzing the experimental data, and a dynamics model of the organic acid generation and a thermodynamic model of the decarboxylation and erosion reaction of the organic acid can be established; the geological application can be realized by combining the models with the sedimentary and burial history, thermal history and mineral association characteristics of the reservoir in a research area, the development situation of a secondary erosion pore in different geologic periods can be quantitatively evaluated, and a foundation can be set for predicting a tight oil exploration sweet spot area.

The invention discloses an online-sampling hydrothermal system hydrocarbon source rock-to-hydrocarbon thermal simulation experiment apparatus. The apparatus comprises a reaction vessel, a thermocouple, a heater, a sampling device, a reaction solution injection device, and a controller for controlling the temperature, the pressure and the motion execution of the experiment apparatus. The temperature and the pressure can be constantly controlled through controlling the motion executions of all parts by the controller in the reaction process of substances in the reaction vessel in order to satisfy requirements of the reaction dynamics; the sampling device can sample and analyze a gas and a solution obtained after the reaction in order to realize the continuous sampling and online analysis in the experiment process, and the experiment precision and the analysis efficiency are high; and the reaction vessel has a large volume in order to avoid large influences of the take-out a small amount of a sample in the reaction process to the temperature, the pressure and the chemical components of a whole reaction system.

The invention discloses a process for bending an X100 steel grade large-caliber bent pipe through intermediate frequency induction heating, which comprises the following steps of: (1) selecting raw materials meeting the standard; (2) performing a thermal simulation experiment; (3) bending; (4) correcting to round the end of the bent pipe; (5) machining a groove; (6) performing thermal treatment, namely reasonably tempering, and eliminating the stress of the bent pipe by using a natural gas thermal treatment furnace; (7) performing surface treatment; and (8) detecting a finished product, wherein process parameters are that: the pushing temperature is between 960 and 990 DEG C, the pushing speed is 25mm / min, the cooling speed is 600 DEG C / min, the cooling water temperature is less than or equal to 40 DEG C, and the tempering temperature is between 500 and 530 DEG C. A straight pipe section and a bending section are wholly heated and tempered, so that the uniformity and consistency of the whole performance index of the bent pipe are ensured; the bent pipe does not have an obvious tissue transition region, so that the stress defect caused by different tissues is overcome; and the ovality of a bent part of the bent pipe is controlled by controlling the width of a heating strip, so that the product has a good appearance size.

The invention relates to a winding temperature measuring method of an oil-immersed power transformer. A thermal simulation experiment principle is utilized, actual heating current is obtained after the steps of acquiring related parameters of the transformer, inquiring a thermal simulation features-temperature rise and current mapping table, computing and the like, actual copper oil temperature difference is obtained according to an actual heating current lock-up table, and top oil level temperature is superposed to obtain the winding temperature. The method has the advantages that a winding temperature meter used by the transformer in field can be replaced completely, and economic cost and maintenance cost for purchasing the winding temperature meter are saved greatly; the effect as same as that of measurement by the winding temperature meter can be achieved, and the temperature of a transformer winding can be uploaded to a monitoring data network accurately and inerrably; the problem of inaccuracy of winding temperature measurement caused by influences of the environmental temperature or self defects of the winding temperature meter can be solved completely, and operation and maintenance level of a transformer substation can be increased.

The invention discloses a hydrocarbon dynamics high pressure thermal simulation experiment method and the device for the rock sample, which belongs to the rock oil and natural gas earth chemical experiment research technology field. The method includes the sealing sample into the gold pipe, putting the gold pipe into the high pressure kettle, putting many high pressure kettle into one pyrolyzing oven, starting the water adding pressure and stabilized voltage system, the pyrolyzing oven, picking out one high-pressure kettle and cooling quickly in different temperature point, closing the pyrolyzing oven and water adding pressure and stabilized voltage system until the high-pressure kettle with sample is picked out, then opening the high-pressure kettle and analysis of the sample; the device is made up of the water adding pressure and stabilized voltage system, the heating system and the controlling system. The water adding pressure and stabilized voltage system includes the water tank, the high pressure water pump and the stabilized voltage valve. The heating system includes the pyrolyzing oven, many high-pressure kettles and circle fan. The controlling system includes the central computer, the pressure controller, the pressure recorder, the temperature controller and multi-way temperature detection recorder. The invention can be used in analysis of the kerogen or rock sample.

The invention discloses a digital transformer winding temperature measuring device, comprising a current converter, a relation computation module, a thermal simulation computation module, a response time setting module and an addition computation module as well as an oil temperature sensor and a temperature display and control module. The current converter is connected with the relation computation module; the relation computation module is connected with a thermal simulation computation module; the thermal simulation computation module, the oil temperature sensor and the temperature display and control module are connected with the addition computation module, respectively; and the response time setting module is connected with the thermal simulation computation module. In the invention, the current converter and a circuit module are added, so that outputting of a current signal is realized, a microprocessor is used for calculating transformer winding temperature by means of mathematic modelling, and the effects of high accuracy, high automation and use convenience are achieved.

The invention discloses a diagenetic evolution simulation experiment method for mud shale and belongs to the field of petroleum exploration and development. The diagenetic evolution of a mud shale reservoir is simulated by using the experiment method, and the problem of evolution of organic matters, mineral components and pores in the mud shale reservoir is solved. The method comprises the following main experiment steps: (1) preparing a sample; (2) performing thermal simulation, (3) collecting and analyzing oil gas; (4) performing experiment sample after-treatment; (5) performing different scales and different ways of comprehensive observation research on the evolution of the organic matters of the sample, the diagenesis of inorganic minerals and the development situation of the pores by utilizing a common polarizing microscope, a fluorescent microscope, a laser scanning confocal microscope, a cathode luminescence microscope and a field emission scanning electron microscopy. The method is used for researching the diagenetic evolution of the mud shale reservoir and determining the evolution characteristics of the organic matters, the mineral components and the pores with different lithofacies, different organic matter types and different organic matter maturity stages in the mud shale reservoir, and plays an important role in research of the characteristics of the mud shale reservoir and the characteristics of an oil-gas enrichment rule.

The invention discloses a method for carrying out a stress relaxation test on a Gleeble3800 hydraulic wedge unit in a Jaw control mode, which comprises the following steps: welding a thermocouple onto a sample, adopting a K-shaped thermocouple when the heating temperature of the sample is below 1200 DEG C, and adopting an S-shaped thermocouple when the heating temperature of the sample is above 1250 DEG C; respectively spreading a lubricant on a pressure head and the sample to reduce the friction force in compression, and isolating the pressure head and the sample through a tantalum sheet to prevent the pressure head and the sample to react in a high temperature state; opening an air hammer, compacting the sample, controlling the pressure to be about 100Kg, then opening a Gleeble3800 thermal simulation tester and leftwards moving the pressure head to a proper position; carrying out vacuum pumping, and charging Ar gas for protection when the vacuum degree is up to 2.4*10 to 1tau; carrying out compression by adopting the Jaw control mode; and after equipment operation is finished, reserving a high temperature organization state by adopting a direct quenching method, verifying precipitation and recrystallization conditions, and finishing the stress relaxation test. The invention has low cost and high precision and can be used for researching the precipitation behavior of various strain induced precipitates.

The invention relates to a temperature rise characteristic field testing method of a thermal simulation device of a transformer winding temperature controller. The method comprises the following steps of: 1) keeping the temperature bulb of the temperature controller and an electric heating element in the thermal simulation device to be normally installed on a transformer, and when the internal temperature of the shut-down transformer drops to be consistent with ambient temperature, reading the indicated temperature value of the temperature controller and recording the temperature value as T1; 2) according to parameters such as the rated load current of the transformer and the transformation ratio of a current transformer, calculating and determining the magnitude of testing heating current Ih and outputting the current to the temperature controller through a constant-current source device; 3) after the indicated temperature value of the temperature controller is stabilized for 45 minutes, reading the indicated temperature value and recording the temperature value as T2; and 4) calculating temperature rise delta T=T2-T1 produced by the thermal simulation device of the temperature controller under the condition of the heating current Ih corresponding to the load current of the transformer which is I, so as to obtain the temperature rise characteristic. The temperature rise characteristic field testing method of the thermal simulation device of the transformer winding temperature controller has the advantages that the problem that the temperature rise characteristic of the thermal simulation device of the temperature controller cannot be tested in the field at present is solved, and the accuracy and the reliability of the measurement of the winding temperature controller in service are guaranteed.

The invention relates to a method for acquiring a mobility parameter of a re-crystallized structure evolution crystal boundary of a metal material. The method comprises the following steps: (1) performing static re-crystallization or dynamic re-crystallization physical thermal simulation test on a metal material sample; (2) acquiring an average grain size of static re-crystallization or dynamic re-crystallization of the sample by utilizing a microstructure representation test; (3) establishing a re-crystallization dynamical model on the basis of a structural evolution numerical simulation method, wherein the model includes nucleation and growing sub-models; (4) describing a nucleation rate sub-model through a nucleation rate, excluding the parameters, such as nucleation activation energy, difficult to acquire through the test and the parameters without physical significance; (5) expressing the migration rate of the crystal boundary of a re-crystallization growing sub-model by the product of the driving force and the mobility parameter of the crystal boundary, wherein the mobility parameter of the crystal boundary is a unique fitting parameter in the whole model; (6) adjusting the mobility parameter of the crystal boundary by adopting an inverse optimization algorithm, comparing a numerical simulation result with a test result and confirming the parameter when a difference between the numerical simulation result with the test result is less than a threshold value (0.01-0.1).

The invention provides a method for estimating light hydrocarbon product amountin a hydrocarbon generation and expulsion thermal simulation experiment. In the method, on the basis of various hydrocarbon generation and expulsion thermal simulation experiments,through the steps of discharging a part of remaining hydrocarbon and collecting and measuring discharged products, initial rock sample pyrolysis analysis data S1 and S2 are combined withrock residual sample pyrolysis analysis data S1' and S2' obtained after experiments to establish a calculation formula for light hydrocarbon yield Pt, so that the light hydrocarbon product amount in the hydrocarbon generation and expulsion thermal simulation experiment can be conveniently and accurately obtained. According to the method for estimating the light hydrocarbon product amount in the hydrocarbon generation and expulsion thermal simulation experiment, the problem of difficulty in accurate estimation of light hydrocarbon amount even when low-temperature cooling and a high-end apparatus are matched in various hydrocarbon generation and expulsion experiments is solved, a hydrocarbon generation and expulsion device and a subsequent treatment device are simplified and even eliminated, and the problems of a pyrolysis rock S1 light and heavy hydrocarbon correction method (CN103543470A) are also solved.

The invention discloses a thermo-mechanical load simulation and error detection system and method for a machine tool cutting machining process. The machine tool thermo-mechanical load simulation and error detection system comprises a machine tool working table, a spindle core rod, a controller, a control system, a cutting thermal simulation device, a one-way cutting force simulation device and a machine tool feeding system heat source simulation device, wherein the cutting thermal simulation device and the one-way cutting force simulation device are arranged on the machine tool working table. According to the thermo-mechanical load simulation and error detection system and method for the machine tool cutting machining process, a mechanism of a machine tool does not need to be dismounted from the machine tool, so that an experimental situation more accords with the actual working condition; and meanwhile, an error value can be fed back to a compensation module in a machine tool control system, the machining error can be decreased, and the machining precision can be improved.

The invention discloses a production method of heat-resistant steel welding wires. The method sequentially comprises the following steps of 1) performing steel ingot smelting according to designated chemical components to obtain a steel ingot; 2) testing the continuous cooling transformation curve of the welding wire steel by adopting a Gleeble thermal simulation test and deducing process parameters for rolling and cooling control; 3) rolling the steel ingot into coil rods with diameter of 5.5-8.0mm by referring to a process; 4) performing rough drawing to the coil rods after acid washing; 5) performing primary annealing treatment, the process of which is heating to 830-850 DEG C, preserving heat for 2 hours and then slowly cooling; 6) performing fine drawing after acid washing to obtain welding wires with diameter of 0.8-4.0mm. The drawing performance of the coil rods produced by adopting the production method disclosed by the invention is good, one time of annealing is only required in the process of drawing the coil rods into the welding wire finished products, the production efficiency is improved, the produced welding wires can be used for chrome-molybdenum heat-resistant steel welding, the electric arc is stable during welding, the spatter is less, the slag is easy to remove, and welded joints have excellent impact toughness, temper embrittlement resistance, high-temperature strength and creep resistance.

The invention discloses an aircraft ground thermal simulation test apparatus capable of rapidly cooling. The aircraft ground thermal simulation test apparatus comprises an air compressing system (A), a water / liquid nitrogen supply system (B), a first test piece heating-cooling test platform (C), a second test piece heating-cooling test platform (D), and a data acquisition and control system (E). The aircraft ground thermal simulation test apparatus can effectively integrate the heating and cooling systems of an aircraft, test piece position can be exchanged between a heating end and a cooling end on the heating-cooling test platform through a linear slide rail, after the test piece reaches a predetermined temperature, the test piece moves along the track and triggers a stroke switch so that a cooling working medium is released, rapid starting for cooling is realized, heating and cooling simulation test processes can be effectively connected; urgent demand for exploitation of novel high-speed aircrafts and guarantee of flight safety can be satisfied, and a ground thermal simulation test method can be improved.

The invention discloses an error correction method of welding residual stress ultrasonic measurement. The method comprises A, preparing a welded test plate 1 and a welded test plate 2 from a mother material plate of a welded test piece to be detected, B, taking an arcing region sample, a stable region sample and an arc suppression region sample from the welded test plate 1, subdividing the samples according to microstructural difference, and labeling welding feature points, C, labeling welding feature points at corresponding positions of the welded test plate 2, and acquiring a thermal cycle curve by the labeling welding feature points of the welded test plate 2, D, preparing a thermal simulation block E by the thermal cycle curve, E, according to mother material small block and thermal simulation block residual stress measured by an ultrasonic method and a sectioning method, determining a residual stress corrected value, F, according to the residual stress corrected value, correcting an ultrasonic measurement residual stress measured value so that an accurate residual stress value of the welded piece to be detected is obtained. The error correction method can correct errors caused by difference of microstructures of a mother material zone and a zone to be detected and substantially improve residual stress ultrasonic measurement precision.

The invention provides a calibration method of a terminal simulation model of a circuit board. The calibration method includes providing a circuit board and establishing a thermal simulation model of the circuit board; testing thermal performance of the circuit board according to the set testing environment so as to obtain a temperature cloud picture of the circuit board; simulating the thermal simulation model thermally to obtain a temperature cloud picture of the thermal simulation model according to the testing environment and adjusting power consumption values of the thermal simulation model during thermal simulation until the temperature cloud pictures of the thermal simulation model and the circuit board satisfy the preset conditions and the power consumption value of the current thermal simulation model is obtained; calibrating the thermal simulation model according to the testing environment and the power consumption value of the current thermal simulation model. According to the calibration method in the embodiment, the simulation results of the thermal simulation model are more real and reflect more real performance of the circuit board, the circuit board can be optimized and guided, and development efficiency of the circuit board is improved. The invention further provides a calibration system of the thermal simulation model of the circuit board.

The invention relates to a PCB reliability prediction method and device, a computer readable storage medium and computer equipment. The method comprises the following steps of: constructing a PCB structure model on the basis of laminated structure information of a target PCB, wherein the PCB structure model comprises a substrate model, a copper foil layer model and a guide hole model; configuringthermal performance parameters for the substrate model, the copper foil layer model and the guide hole model in the PCB structure model on the basis of material using information of the target PCB, soas to obtain a PCB simulation model; obtaining a temperature field simulation result of the target PCB, wherein the temperature field simulation result is generated by carrying out thermal simulationon the basis of a predetermined temperature simulation parameter and the PCB simulation model; obtaining a stress field simulation result of the target PCB, wherein the stress field simulation resultis generated on the basis of the temperature field simulation result; and predicting reliability of the target PCB on the basis of the stress field simulation result. According to the method and device, the computer readable storage medium and the computer equipment, the prediction efficiency can be effectively improved.