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62 results about "Fire test" patented technology
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A fire test is a means of determining whether fire protection products meet minimum performance criteria as set out in a building code or other applicable legislation. Successful tests in laboratories holding national accreditation for testing and certification result in the issuance of a certification listing. The listing is public domain, whereas the test report itself is proprietary information belonging to the test sponsor.
Large-span bridge substructure vehicle-fire-wind real-time hybrid test platform and implementation method
The application provides a large-span bridge substructure vehicle-fire wind force real-time hybrid test platform and implementation method, the platform comprises a physical loading and transmission system, a T-shaped wind-fire coupling simulation system, a modularized prying integrated system, an intelligent control and calculation system and a multi-dimensional high-precision monitoring system. The method realizes real-time pre-test of the boundary displacement / force of the test piece through the construction of a numerical substructure fast calculation model based on LSTM and converts the boundary displacement / force into a loading instruction to drive the through core jack to realize thermal force coupling interactive loading; the T-shaped wind-fire coupling simulation system reproduces the real vehicle fire scene under the influence of the environmental wind. The test platform supports independent loading of any component of the cable system, can execute open space self-defined fire test and closed space standard fire test, and accurately analyzes the cable failure mode, critical temperature threshold and damage evolution law under fire through the multi-dimensional high-precision monitoring system, thereby providing a high-fidelity test platform and analysis method for fire resistance design of large-span bridges.
Owner:CHINA UNIV OF MINING & TECH +5
A deep learning-based rapid non-destructive prediction method for the maximum temperature of a cable after fire
The application discloses a kind of based on deep learning's cable over fire maximum temperature fast nondestructive prediction method, it is related to bridge post-fire safety evaluation technical field.The method obtains the apparent image data of cable anticorrosion-fire protection system at different temperatures by various fire tests, and constructs special data set after shunt pretreatment;Innovatively, a double-branch weight sharing prediction model based on ConvNeXt-Tiny is constructed, the state characteristics of cable flame-retardant sealant layer and anticorrosion layer are extracted by two parallel branches respectively, deep representation learning is carried out by feature fusion and shared backbone network, and finally high-precision parallel prediction of double temperature parameters is realized by two ordered classification prediction heads;Using transfer learning strategy and hybrid loss function for training, the prediction accuracy and generalization ability are significantly improved;Finally, a visual window is developed to realize the fast nondestructive evaluation of cable over fire temperature without disassembly and sensor.The method provides reliable technical support for post-fire safety performance evaluation of bridge cable.
Owner:CHINA UNIV OF MINING & TECH +3
Prediction method for prestress loss of steel cable in whole fire process
PendingCN121211815AGeometric CADDesign optimisation/simulationBridge engineeringFinite element software
The invention discloses a method for predicting the prestress loss of a steel cable in the whole fire process, and belongs to the technical field of bridge engineering. The method comprises the steps that a finite element heat transfer analysis model of the steel cable is established based on ABAQUS finite element software, and a finite element thermal coupling analysis model of the corresponding steel cable is established; and loading the heat transfer analysis result of the steel cable as a pre-stress field into a thermal-mechanical coupling analysis model, and simulating to obtain the pre-stress loss evolution condition of the steel cable in the whole fire process. According to the method, the prestress loss of the steel cable in the whole fire process is analyzed through numerical simulation, and compared with a traditional fire test method, the research cost is greatly reduced, and the analysis efficiency is remarkably improved; the prediction method provided by the invention can be directly applied to engineering practice, provides a scientific basis for evaluating the stress state of the steel cable structure after the fire, has an important reference value for guiding the formulation of a post-disaster repair scheme, and is beneficial to improving the fire-resistant safety performance of an engineering structure.
Owner:CHINA UNIV OF MINING & TECH
Power battery external burning test system and method
The invention discloses a power battery external burning test system and method. The power battery external fire test system comprises a test execution unit used for executing a power battery system external fire test, and the test execution unit comprises a water tank internally used for storing water for fire extinguishing and a test platform arranged in the water tank, controlled to ascend and descend and used for carrying a tested power battery. After the test platform descends to a preset position, the power battery on the test platform can be immersed into water; the cover box is matched with the test platform and used for covering the power battery in the test, a water mist fire extinguishing device used for extinguishing after the test is ended is mounted on the cover box, the combustion module is used for burning the outside of the power battery after ignition, and the ignition device is used for igniting the combustion module. Compared with an existing external fire test system, the device is more suitable for the combustion working condition when the whole vehicle is on fire, and the test result has higher reference value.
Owner:中汽新能(天津)电池科技有限公司
Fire response prediction method for reinforced concrete columns based on thermal boundary distortion similarity
The application discloses a reinforced concrete column fire response prediction method based on thermal boundary distortion similarity, and relates to the technical field of civil engineering structure fire resistance. In view of the problem that the existing scale model fire test needs to strictly meet the complete similarity of the thermal boundary, and the temperature rising rate of the model temperature curve is too high to be implemented in the test furnace, the distortion coefficient is introduced in the calculation of the scale model temperature field, the high-temperature real-time load ratio is taken as a unified mechanical response index, and the response mapping relationship between the prototype and the model is constructed. The distortion coefficient is determined through iterative calculation to make the high-temperature real-time load ratio prediction coefficient meet the preset error range, and the distortion coefficient is used to realize accurate prediction of the prototype fire response. The application does not pursue the complete similarity of the prototype and the model temperature field, but realizes equivalent mapping of the prototype and the model at the high-temperature mechanical response level by introducing the distortion coefficient, thereby significantly improving the engineering implementability of the scale model fire test and reducing the test cost.
Owner:SOUTH CHINA UNIV OF TECH +1
Fireproof brick wall shelf
The utility model discloses a fireproof brick wall shelf, which belongs to the technical field of constructional engineering and comprises a wall body built by a plurality of concrete blocks, a longitudinal reinforcing plate and a transverse reinforcing plate are arranged in the wall body, the upper end and the lower end of the longitudinal reinforcing plate are respectively connected with a top connector and a bottom connector, and the outer side of the transverse reinforcing plate is connected with an outer side connector. The inner side of the wall body is connected with an inner side connector and is connected with a longitudinal reinforcing plate through the inner side connector, the longitudinal reinforcing plate is further provided with an inner side wall pull rod, and the outer side of the wall body is further provided with an outer side wall pull rod. According to the structure, the purpose of reducing material cost and weight is achieved, all the parts can be installed on a construction site and connected with the adjacent concrete blocks respectively, the whole process does not need additional equipment assistance, and therefore construction cost and difficulty are reduced, construction efficiency is improved, safety accidents can be reduced, and in addition, the construction quality is improved. And the whole fireproof brick wall shelf can be subjected to a fireproof test, and can meet the fireproof requirement of 4 hours at most and the STC50 sound insulation requirement.
Owner:林太魁
Fireproof testing device for insulation board production
The utility model discloses a fireproof testing device for heat insulation board production, relates to the technical field of fireproof testing of heat insulation boards, and aims to solve the problems that an existing fireproof testing device for heat insulation board production is affected by a clamping assembly in the testing process, the two sides of a heat insulation board are heated unevenly, and detection data are affected. According to the utility model, the direct contact area between the clamping assembly and the insulation board is reduced as much as possible, so that the influence of the clamping plate on the test is reduced, and in the test process, the insulation board clamping assembly can drive the insulation board to turn over in the switch assembly, so that different surfaces of the insulation board are baked, and the condition that the insulation board is heated in multiple directions in a real fire can be simulated; the fireproof performance of the insulation board in an actual fire scene can be reflected more accurately, evaluation one-sidedness caused by single-side testing is avoided, a scientific basis can be better provided for building design, fire engineering and the like, and reasonable application of the insulation board in different places and environments is guided.
Owner:INNER MONGOLIA NORTH TIMES DESIGN & RES INST CO LTD
Devices and methods for fire protection and heat shielding of filter bowls
A fire and protection system designed to provide fire protection / heat shielding for fuel filter clear bowls to pass a fire test as required by ABYC standards. The fire and protection system comprises a backplate and a clear fuel filter bowl shield.
Owner:OHNOH2O LLC
Multi-angle movable fireproof material testing device and testing method thereof
PendingCN121347268AChemical analysis using combustionMaterial strength using tensile/compressive forcesFire testMaterials testing
Owner:HENTONG CNR (SHANGHAI) RAIL TRANSIT VEHICLE MAINTENANCE CO
Intelligent fire identification method and device for super high-rise building, and inspection robot
The invention provides an intelligent fire identification method for a super high-rise building, and the method comprises the steps: selecting different floors of the super high-rise building, setting a plurality of monitoring points, deploying a floor monitoring platform at each floor, setting an upper-level monitoring platform at a whole building or region level, and building a hierarchical real-time data transmission link; fire scene parameter data of each monitoring point are collected through an entity fire test and uploaded to the upper-level monitoring platform; and constructing a fire identification model and deploying the fire identification model at the upper-level monitoring platform, wherein the input parameters of the fire identification model include temperature and floor height, and the output parameters are fire identification results of different floor heights. According to the method, the accuracy and real-time performance of fire early warning of the super high-rise building can be effectively improved.
Owner:CHINA IPPR INT ENG CO LTD
Fire test piece surface heat flux density acquisition device, system and method
This invention relates to the field of aircraft fire resistance testing technology, and discloses a device, system, and method for acquiring the surface heat flux density of a fire-resistant test specimen. The system initialization includes: total heat flux measurement (obtaining the theoretical total heat flux value q0); actual pure radiative heat measurement (setting a glass cover around the heat flux sensor without changing its position, shielding convective heat through the glass cover, and then collecting the theoretical radiative heat flux value q1 measured by the heat flux sensor); and multiplying the pre-measured emissivity of the test specimen surface by the theoretical radiative heat flux value q1 to obtain the actual pure radiative heat flux value q. r Actual heat flux calculation: Actual convective heat value q c The actual heat flux q is obtained by subtracting the theoretical radiative heat flux q1 from the theoretical heat flux q0. a Equal to the actual pure radiative heat flux value q r and actual convective heat value q c The sum of radiative heat and convective heat is achieved through precise measurement of these two heat sources under actual aircraft fire conditions, providing high-fidelity, multi-scenario, and highly consistent thermal flow data for twin experiments.
Owner:THE SECOND RES INST OF CIVIL AVIATION ADMINISTRATION OF CHINA +2
Material fire resistance testing system
The application discloses a material fire resistance performance testing system, which comprises a mounting seat, a fire source device and a control device. The mounting seat is formed with a mounting surface for mounting a to-be-detected piece. The fire source device comprises a driving mechanism and a fire source piece connected with the driving mechanism. The driving mechanism is used for driving the fire source piece to approach or move away from the to-be-detected piece. The control device comprises a temperature detector and a controller. The temperature detector is used for detecting the surface temperature of the to-be-detected piece. The controller is used for controlling the driving mechanism to adjust the position of the fire source piece according to the surface temperature, so that the temperature rise change of the to-be-detected piece in the test process is similar to the actual temperature rise change in a fire. Compared with a traditional fire test furnace, the material fire resistance performance testing system provided by the application cancels the furnace body, directly heats the to-be-detected piece by the fire source piece, and simulates the temperature environment in a fire through distance adjustment, thereby avoiding fuel waste.
Owner:STATE GRID HUNAN ELECTRIC POWER COMPANY LIMITED +3
Simplified calculation method and device for building large space smoke movement model
The application discloses a simplified calculation method of a building large-space smoke movement model, which comprises the following steps: analyzing the geometric space form of a large space, determining the corresponding building large-space category, wherein the category comprises a flat large space and a high large space; according to the building functions of different large spaces, combining relevant fireproof design specifications or adopting a site fire test method to determine the fire source power value in the space; according to different building large-space categories, measuring the temperature of the large space and calculating and determining the corresponding temperature gradient; according to the obtained large-space temperature and the fire source power value, calculating and determining the heat buoyancy flux of the fire source; combining the obtained known environmental conditions, calculating and determining the space distribution characteristics and amplitude of physical parameters such as the smoke speed, temperature rise and movement radius, and used for early detection of a large-space fire and smoke exhaust design.
Owner:TONGJI UNIV
Ground hot test run assessment method for space orbit control engine
The invention provides a ground hot test run checking method for a space orbit control engine, which is used for checking whether a product can reliably complete in-orbit flight or not, and is characterized by comprising the following steps of: 1, formulating an acceptance hot test run program and working conditions; 2, carrying out product acceptance hot test run; step 3, selecting a casual inspection hot test run product; 4, formulating a hot test run program and working conditions of the identification-grade service life assessment; step 5, carrying out identification-level service life examination hot test run on the casual inspection product; and step 6, evaluating whether the product passes the assessment. The method provided by the invention aims to identify the defects of the orbit control engine in advance through hot test run assessment, assess the adaptability of a product to a flight mission profile, and ensure that the long-life space orbit control engine works reliably in orbit.
Owner:SHANGHAI INST OF SPACE PROPULSION
Integrated Rocket Structure Testing and Launch
The invention of the rocket structure test and launch has made a great contribution to the field of aerospace technology; especially in sounding rockets, it has three basic functions: the rocket's cold flow (cold flow 168; hot-fire test) and launch stages are integrated into a single structure. In addition, it is used to move the rocket from one place to another by attaching the launcher, which makes it different from other rocket launchers.
Owner:SPACE SCI & GEOSPATIAL INST +1
System for testing ignition of fuel liquid drops on high-temperature hot surface
The utility model discloses a system for testing ignition of fuel liquid drops on a high-temperature hot surface, and belongs to the field of combustion science. A system for testing ignition of fuel liquid drops on a high-temperature hot surface comprises a working box and an injection pump fixedly connected to the top of the working box, the output end of the injection pump is connected with a discharging pipe through an injector, and the discharging pipe extends into a cavity of the working box and is provided with a control valve; the platform is connected to the interior of the cavity of the working box in a lifting mode, a heating table is arranged on the platform, and the discharging end of the discharging pipe faces the top of the heating table; according to the utility model, the high-speed camera can be used for recording the phenomenon that liquid drops drop on a high-temperature hot surface in real time, and then the infrared thermal imager is used for recording the temperature of the hot surface and the flame combustion distribution condition in real time, so that the hot ignition process is realized, the experiment can be repeated, and the ignition probabilities of different fuels are allowed to be quantitatively analyzed; the accuracy of ignition characteristics is improved, and liquid drops can drop from different heights so as to explore the fire phenomenon at different impact rates.
Owner:CIVIL AVIATION FLIGHT UNIV OF CHINA
Titanium fire test device capable of achieving positioning ignition and test method
The invention provides a titanium fire test device capable of achieving positioning ignition and a test method. The titanium fire test device capable of performing positioning ignition is used for performing titanium burning verification on a test blade and comprises a gas source, a frame body, an igniter and a positioning ignition structure, wherein the frame body is enclosed to form a flow channel, and the test blade is arranged in the flow channel; the air source is connected with the frame body, and the air source is used for providing test airflow capable of flowing in the flow channel; the igniter is arranged on the positioning ignition structure and is used for igniting the test blade; the frame body is provided with a positioning part communicated with the flow channel, and the positioning ignition structure is matched with the positioning part, so that the positioning ignition structure can move along at least one direction, and the ignition position of the igniter on the test blade is further changed. The titanium fire test device can position the ignition position.
Owner:AECC COMML AIRCRAFT ENGINE CO LTD
Ground thermal test method for space orbit control engine
This invention provides a ground hot-fire test method for space orbital control engines, used to assess whether the product can reliably complete on-orbit flight. The method comprises the following steps: Step 1, developing acceptance hot-fire test procedures and operating conditions; Step 2, conducting product acceptance hot-fire tests; Step 3, selecting products for random hot-fire test inspection; Step 4, developing qualification-level life assessment hot-fire test procedures and operating conditions; Step 5, conducting qualification-level life assessment hot-fire tests on randomly selected products; Step 6, evaluating whether the product passes the assessment. The method provided by this invention aims to identify orbital control engine defects in advance through hot-fire test inspections, assess the product's adaptability to flight mission profiles, and ensure the reliable on-orbit operation of long-life space orbital control engines.
Owner:SHANGHAI INST OF SPACE PROPULSION
Rotor blade titanium fire test device and test method based on laser ignition method
PendingCN121994988AVerify propagation pathVerify containment propertiesChemical analysis using combustionParticulatesThermodynamics
The rotor blade titanium fire test device based on the laser ignition method comprises a laser device, a shell and a driving assembly, a cavity for containing a rotor blade is defined by the shell, and a transmission window is formed in the shell and used for receiving laser generated by the laser device so as to ignite the rotor blade; the driving assembly comprises a rotating shaft connected with the rotor blades and a motor driving the rotating shaft and is used for driving the rotor blades to rotate in the cavity. The invention further provides a rotor blade titanium fire test method. The device can truly simulate splashing of titanium fire high-temperature particles.
Owner:AECC COMML AIRCRAFT ENGINE CO LTD
Tunnel fire test device for natural ventilation and smoke exhaust of unpowered hood
The invention belongs to the technical field of tunnel ventilation and smoke discharge, and relates to a tunnel fire test device for natural ventilation and smoke discharge of an unpowered hood, which comprises a first box body, a second box body, an unpowered hood, two frequency conversion fans, a fire source combustion assembly, a smoke assembly, a detection assembly, a shooting assembly and a control assembly. A tunnel is simulated through the first box body, a vertical shaft is simulated through the second box body, tunnel wind and environment wind are simulated through the two frequency conversion fans, a fire disaster is simulated through the fire source combustion assembly, flue gas generated when the fire disaster occurs is simulated through the flue gas assembly, and the wind speed and temperature when the fire disaster occurs are detected through the detection assembly. Flame combustion and smoke flowing images are shot in real time through the shooting assembly when a fire occurs, and then the rotating speeds of the two frequency conversion fans are controlled according to the air speed, so that different pressure differences are formed inside and outside the tunnel; and the influence of ventilation and smoke discharge of the unpowered air cap on the temperature and smoke flow in the tunnel under the driving of different pressure differences is researched in cooperation with received temperature and smoke flow images.
Owner:NANJING TECH UNIV
Fire test powder mixing uniformity identification method and system
According to the method and the system for identifying the mixing uniformity of the fire gold test powder, the fire gold test powder crucible image is identified through the target detection model, and then weak anomalies which are difficult to identify by the model are captured based on the mixing proportion and the image gray feature of each crucible area; the problems of missing detection, misjudgment and judgment blind areas caused by only relying on a target detection model are solved, and more accurate and objective judgment of the mixing uniformity is realized.
Owner:SHANDONG ALESMART INTELLIGENT TECH CO LTD
Multifunctional fire testing instrument
1. The name of the design product: multifunctional fire test instrument. 2. The use of the design product: for fire system intelligent component coding; also for checking whether the circuit is unobstructed, measuring AC and DC voltage, current parameters; measuring resistance, capacitance, inductance, frequency in the circuit, and diode and triode parameters; also for detecting various gas concentrations. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.
Owner:SICHUAN JINGYIWEI TECH CO LTD
Pool fire burner for indoor fire test
The invention provides a pool fire burner for an indoor fire test, and the pool fire burner comprises a variable cross-section combustion unit which comprises a combustion oil pool and a cooling sleeve, and the cross-sectional area of the combustion oil pool is continuously increased along with the increase of height from bottom to top; the fuel conveying unit comprises an oil barrel, an oil inlet pipeline and an oil outlet pipeline, the oil barrel is connected with the bottom of the combustion oil pool through a communicating pipe to form a communicating vessel structure, and a liquid level sensor is arranged in the oil barrel; the temperature control unit comprises a water inlet pipeline, a water outlet pipeline, a water pump, a second electromagnetic valve and a thermocouple assembly which are communicated with the cooling jacket; and the central control unit is configured to calculate the target liquid level height according to a preset time-heat release rate curve and output a control signal to drive the fuel conveying unit to perform bidirectional oil injection or oil pumping by comparing the real-time liquid level height fed back by the liquid level sensor so as to adjust the actual liquid level in the combustion oil pool to change along with the target liquid level height. According to the invention, the precision and repeatability of the fire test are obviously improved.
Owner:WUHAN UNIV
Battery test device including stabilized battery test
The present invention relates to a battery test device configured to perform various types of tests, such as a compression test, a drop test, a penetration test, a fire test, and a collision test, guarantee a stable battery test, and prevent the spread of a fire.
Owner:MRIG INC
Method, device and equipment for evaluating burning safety of composite material wound high-pressure gas cylinder
The invention discloses a method, a device and equipment for evaluating the burning safety of a composite material wound high-pressure gas cylinder, relates to the technical field of safety evaluation of high-pressure gas cylinders, and is used for effectively evaluating the failure risk of the composite material wound high-pressure gas cylinder in a burning environment. Comprising the steps of performing flow field analysis on fire source heat flow input to obtain a flow field analysis result; carrying out a high-temperature test on the composite material and the metal lining, and determining constitutive model parameters related to the temperature; establishing a heat-force coupling analysis model based on the flow field analysis result, the constitutive model parameters and the defined transient heat-force load borne by the high-pressure gas cylinder; verifying and correcting the thermal-mechanical coupling analysis model through a burning test; if the high-pressure gas cylinder is damaged, a fluid-solid coupling analysis model is established in combination with a bisection method, the burning safety of the composite material wound high-pressure gas cylinder is evaluated, and the failure risk of the composite material wound high-pressure gas cylinder in the burning environment can be accurately evaluated.
Owner:XIAN AEROSPACE PROPULSION INST
A locomotive fire detection system testing device and method
The application discloses a locomotive fire detection system test device and method, comprising, the side wall splicing plate is spliced according to the length of the driver's room and passenger compartment of the locomotive to form a side wall; the end wall splicing plate is spliced according to the width of the driver's room and passenger compartment of the locomotive to form a first end wall and a second end wall; the roof splicing part is spliced according to the height of the driver's room and passenger compartment of the locomotive to form a roof; the application solves the problems of the prior art, such as the test space not close to the real size of the locomotive, the real environment in the compartment, low test simulation degree, low test reference value, high test cost and the like. The application can simulate the scene environment of different models of locomotives to carry out fire tests on the detection device, and the test is convenient and efficient, and the test can be carried out on the fire alarm timeliness of the whole vehicle type, so as to provide reliable and powerful experimental guarantee and basis for the design of the real locomotive fire detection system.
Owner:CRRC DALIAN INST CO LTD
Low pressure environment bifurcated tunnel moving fire test system
This invention provides a low-pressure environment bifurcation tunnel mobile fire source testing system, comprising: a moving slider simulating the movement of a real vehicle within the main tunnel and / or ramps of a bifurcation tunnel to change the fire source location in real time; a pressure sensor detecting the chamber pressure of the combustion chamber in real time, and controlling the chamber pressure by a gas control chamber when there is a difference between the chamber pressure and the target pressure; a purification system controlling the gas concentrations of carbon monoxide and carbon dioxide within the combustion chamber; a data acquisition system collecting flame parameters, smoke parameters, environmental parameters, and temperature parameters; a processor controlling the moving slider to move within the bifurcation tunnel at the start of the test and acquiring the parameters collected by the data acquisition system; and generating an evaluation report of the test process based on the collected parameters at the end of the test. Applying this system allows for testing in a simulated low-pressure environment, and the evaluation report obtained from the test provides data support for fire prevention in low-pressure bifurcation tunnel environments.
Owner:HEBEI UNIV OF ENG
Fire test system and test method for spiral tunnel
The invention relates to the technical field of tunnel simulation tests, in particular to a fire test system and method for a spiral tunnel. The fire test system for the spiral tunnel comprises a plurality of straight-line section tunnels, a plurality of curved-line section tunnels, a hoisting device, a plurality of fans, a temperature detection device and a wind speed detection device. The plurality of curved section tunnels and the plurality of straight section tunnels are spliced to form a tunnel main body; the lifting device is used for lifting the tunnel body to a preset slope. According to the fire test system for the spiral tunnel provided by the invention, a plurality of curved section tunnels or a plurality of curved section tunnels and a plurality of linear section tunnels can be spliced and matched with a hoisting device to form a tunnel with a gradient and a curve, and the tunnels with different structures are formed by splicing a plurality of modularized tunnels, so that the fire test system has flexibility; the special fire smoke behavior of a bent section tunnel and a spiral section tunnel can be simulated, and the simulation test of the Coriolis force effect and the obvious centrifugal force effect can be introduced and quantified, so that the accuracy of the simulation test is improved.
Owner:TSINGHUA UNIVERSITY +1
Photovoltaic module fire test apparatus and experimental method for multiple load applications
The application provides a photovoltaic component fire experiment device and method under multiple loadings. The device comprises a mechanical load applying assembly and a thermal radiation load applying assembly. The mechanical load applying assembly comprises a clamping component for clamping a photovoltaic component and applying a force to the photovoltaic component, the photovoltaic component comprising a test surface for receiving thermal radiation, the test surface being divided into multiple regions; multiple sensors for detecting the heat flux density of the test surface in each of the multiple regions; the thermal radiation load applying assembly is arranged opposite to the test surface of the photovoltaic component, and comprises multiple thermal radiation units, any thermal radiation unit being used for thermal radiation to at least one region of the test surface; and multiple control units connected one-to-one with the multiple thermal radiation units, wherein any control unit is configured to adjust the power of the corresponding radiation unit according to the heat flux density of each of the multiple regions, so that the heat flux density of the multiple regions of the test surface is in a target state.
Owner:UNIV OF SCI & TECH OF CHINA
A method for calculating residual bending stiffness of a t-shaped composite beam after fire
The application discloses a kind of T-shaped composite beam post-fire residual bending stiffness calculation method, belongs to the technical field of fire safety risk assessment, comprising the following steps: (1) fire test design is carried out, numerical model is established to T-shaped composite beam under fire test using Abaqus software, numerical simulation is carried out by model;(2) on the basis of verified finite element model, the working condition is expanded, the influence of different parameters on the residual bending stiffness of T-shaped composite beam after fire is simulated, the parameters include the superposition parameter gamma of T-shaped composite beam, the friction coefficient λ of superposition surface and fire time t;(3) according to the result obtained by simulation, the fitting of the residual bending stiffness of T-shaped composite beam after fire under different working conditions is carried out using SPSS data analysis software, finally the calculated value is compared with the test value or simulation value to verify the accuracy of the calculation method.The application can effectively improve the reliability of T-shaped composite beam bending stiffness evaluation after fire by accurate calculation.
Owner:QINGDAO UNIV OF TECH