Simulation test method, device, equipment, storage medium and product

Abstract

This application discloses a simulation testing method, apparatus, equipment, storage medium, and product, relating to the field of cable flame retardant technology. A cable test model is constructed using the material parameters of the cable under test and the environmental parameters of the test scenario. By measuring the cable material parameters, measuring the environmental parameters of the test scenario, and setting the chemical reaction pyrolysis equation, the combustion process of the cable test model is simulated, thereby obtaining the extinction coefficient and optical path length during the combustion process. Based on the extinction coefficient and optical path length, the smoke density of the cable under test is calculated and evaluated. This solves the problems of cable smoke density testing being greatly affected by the environment, high testing costs, long testing time, and environmental defects. It has beneficial effects such as high accuracy, good reliability, flexible material parameter settings, and no environmental damage.

Description

Technical Field

[0001] The present application relates to the field of cable flame retardant technology, and in particular to a simulation test method, device, equipment, storage medium and product. Background Art

[0002] In the related art, since cable materials are mostly made of combustible organic matter, they are very easy to be ignited under the action of fire sources, and the property losses and life safety hazards caused by the spread of combustion are difficult to estimate. Therefore, in the current cable design process, flame retardant materials need to be added inside the cable to make the cable difficult to ignite, or not easy to burn after ignition, so as to prevent the spread of fire.

[0003] During the design process of cables, the flame retardant performance of cables needs to be evaluated through continuous testing. During the testing process, the substances produced by the combustion of different materials may be very harmful to the human body and will produce a large amount of smoke and irritating gases.

[0004] Therefore, how to evaluate and test the flame retardant performance of cables more safely and conveniently is an issue that needs to be solved urgently. Summary of the invention

[0005] The main purpose of this application is to provide a simulation test method, device, equipment, storage medium and product, aiming to solve the technical problem of how to evaluate and test the flame retardant performance of cables more safely and conveniently.

[0006] To achieve the above purpose, the present application proposes a simulation test method, which includes: Obtain the material parameters of the cable to be tested and the environmental parameters of the test scene, and build a cable test model; Determining a thermal decomposition equation of the cable to be tested based on the material parameters; Inputting the thermal solution equation into a cable test model; Starting to perform a simulation test, and obtaining an extinction coefficient and an optical path length during the simulation test; The smoke density of the cable to be tested is calculated based on the extinction coefficient and the optical path.

[0007] In some embodiments, the step of obtaining material parameters of the cable to be tested and environmental parameters of the test scene to construct a cable test model includes: Obtain the material parameters of the cable to be tested and the environmental parameters of the test scene; Constructing a scene model corresponding to the test scene based on the environmental parameters, the scene model including a combustion chamber, an ignition source, and a fan; Construct a simplified cable model based on testing requirements and material parameters; The cable simplified model is imported into the scenario model to obtain the cable test model.

[0008] In some embodiments, determining the thermal decomposition equation of the cable to be tested based on the material parameters includes: Acquiring combustion data of the cable to be tested, wherein the combustion data is used to characterize the combustible materials involved in the combustion and the generated substances in the cable to be tested; Based on the combustion data, determining at least one chemical reaction occurring when the tested cable burns; Based on the at least one chemical reaction, a thermal decomposition equation of the cable to be tested is determined.

[0009] In some embodiments, obtaining the extinction coefficient during the simulation test includes: At each moment in the simulation test process, two-dimensional slice data at a specified position in the cable test model is obtained by a detection device arranged in the cable test model; Based on the two-dimensional slice data, the extinction coefficient corresponding to the moment is calculated.

[0010] In some embodiments, obtaining the optical path length during the simulation test includes: At each moment in the simulation test process, the distance data of the light beam of the cable test model passing through the smoke environment is obtained by using a light beam detection device arranged in the cable test model; Based on the distance data, calculating the optical path corresponding to the moment; In some embodiments, the calculating the smoke density of the cable to be tested based on the extinction coefficient and the optical path includes: For each moment in the simulation test process, the extinction coefficient and the optical path corresponding to the moment are substituted into the following expression to calculate the smoke density corresponding to the moment:

[0011] Wherein, k is the extinction coefficient at the time, L is the optical path at the time, is the initial light transmittance in a smoke-free environment, and I is the light transmittance corresponding to the moment; The minimum value among the multiple light transmittances is determined as the smoke density of the cable to be tested.

[0012] In addition, to achieve the above purpose, the present application also proposes a simulation test device, the simulation test device comprising: A model building module is used to obtain the material parameters of the cable to be tested and the environmental parameters of the test scene to build a cable test model; An equation acquisition module, used for determining the thermal decomposition equation of the cable to be tested based on the material parameters; A data import module, used for inputting the thermal solution equation into a cable test model; A simulation test module, used to start executing a simulation test and obtain an extinction coefficient and an optical path during the simulation test; The result calculation module is used to calculate the smoke density of the cable to be tested based on the extinction coefficient and the optical path.

[0013] In addition, to achieve the above objectives, the present application also proposes a simulation test device, which includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the simulation test method described above.

[0014] In addition, to achieve the above objectives, the present application also proposes a storage medium, which is a computer-readable storage medium. A computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the simulation test method described above are implemented.

[0015] In addition, to achieve the above-mentioned purpose, the present application also provides a computer program product, which includes a computer program. When the computer program is executed by a processor, the steps of the simulation test method described above are implemented.

[0016] One or more technical solutions proposed in this application have at least the following technical effects: A cable test model is constructed using the material parameters of the cable to be tested and the environmental parameters of the test scene. The combustion process of the cable test model is simulated by measuring the cable material parameters, the environmental parameters of the test scene, and the setting of the chemical reaction pyrolysis equation, so as to obtain the extinction coefficient and optical path during the combustion process. Based on the extinction coefficient and optical path, the smoke density of the cable to be tested is calculated and evaluated, thereby solving the problems of the cable smoke density test being greatly affected by the environment, high test cost, long test time, and environmental defects. It has the beneficial effects of high result accuracy, good reliability, flexible material parameter setting, and no damage to the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 A schematic diagram of a flow chart of a simulation test method provided by an embodiment of the present application is shown; Figure 2 A schematic diagram of the structure of a simulation test device provided in an embodiment of the present application is shown; Figure 3 A schematic diagram of the structure of a simulation test device provided in an embodiment of the present application is shown.

[0020] The purpose, features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0021] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0022] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0023] The main solution of the embodiment of the present application is: obtaining the material parameters of the cable to be tested and the environmental parameters of the test scene, and constructing a cable test model; determining the thermal decomposition equation of the cable to be tested based on the material parameters; Import the pyrolysis equation, material parameters and cable test model into the simulation model; start the simulation test to obtain the extinction coefficient and optical path during the simulation test; calculate the smoke density of the cable to be tested based on the extinction coefficient and optical path.

[0024] In related technologies, with the rapid development of society, cables are widely used in various industries. Since cable materials are mostly composed of combustible organic matter, they are easily ignited by fire sources. Once the cables are ignited, the fire spreads and causes significant losses of property and life. Therefore, cables need to have certain flame retardant properties.

[0025] Currently in the production and design of cables, a large amount of inorganic flame retardants are added to the cable materials, so that they are difficult to ignite in the event of a fire, and are not easy to burn after ignition, thereby preventing the spread of flames.

[0026] Among them, the B1 flame-retardant cable used in subway rail transit has good flame-retardant properties. The smoke density in the flame-retardant performance evaluation index of B1 cable is usually measured and evaluated by combustion experiments. The oxygen concentration, ambient temperature and humidity during the combustion process have a great influence on the results of the physical test, and a large amount of smoke and irritating odor are generated, which is not conducive to environmental protection and the health of the test personnel.

[0027] In summary, how to evaluate and test the flame retardant performance of cables more safely and conveniently is a problem that needs to be solved urgently.

[0028] Based on this, the present application provides a solution that enables the flame retardant performance of the cable to be simulated and measured in a safe scenario without causing harm to the human body and the environment.

[0029] It should be noted that the execution subject of this embodiment can be a computing service device with data processing, network communication and program running functions, such as a tablet computer, a personal computer, a mobile phone, etc., or a simulation test device capable of realizing the above functions, etc. The following takes the simulation test device as an example to illustrate this embodiment and the following embodiments.

[0030] Reference Figure 1 , Figure 1 The flowchart of the simulation test method provided by an embodiment of the present application is shown. The simulation test method can be applied to a simulation test device, and includes the following steps S110 to S150: Step S110, obtaining material parameters of the cable to be tested and environmental parameters of the test scene, and constructing a cable test model.

[0031] The cable to be tested refers to a cable sample used for experiments during cable production or design, which can be selected by staff according to relevant standards (such as national standards, etc.) and the flame retardant grade of the cable, and this embodiment does not limit this.

[0032] The cable to be tested contains combustible materials and the inorganic flame retardant specially added as mentioned above. Material parameters refer to the relevant parameters of different combustible materials measured after the experiment, for example, material parameters may include mass loss rate, thermal decomposition temperature, ignition temperature, etc.

[0033] In some embodiments, the staff can pre-test the combustible material in the cable to be tested by using a thermogravimetric analyzer. Specifically, before making the cable, a sample of the combustible material used to make the cable can be taken and placed in a crucible, and then the crucible can be placed on a balance for weighing; usually the sample size is very small, generally between a few milligrams and tens of milligrams, so as to ensure the accuracy and sensitivity of the experiment.

[0034] The staff can control the heating of the crucible, and the balance continuously monitors the mass of the sample. Any mass change caused by thermal decomposition, oxidation, dehydration or other physical and chemical reactions of the sample will be recorded. After the experiment, the recorded experimental data is curve-fitted, and the first-order derivative of the fitted curve is taken to obtain the weight loss rate curve of the sample material, thereby determining the material parameters such as the mass weight loss rate, thermal decomposition temperature, and ignition temperature of the sample material.

[0035] In some embodiments, the material parameters may also include heat release rate, total heat release, effective combustion heat, ignition time, smoke generation rate, mass change parameters and toxicity parameters. Specifically, before making the cable, the material may be subjected to a combustion test using a cone calorimeter, that is, the sample is placed on a sample rack and mounted on a conical block. The conical block is heated by a heater at the bottom to ignite the sample on the sample rack. During the test, the temperature change on the surface of the conical block is recorded in real time by a temperature sensor, and relevant material parameters such as heat release rate, total heat release, effective combustion heat, ignition time, smoke generation rate, mass change parameters and toxicity parameters are measured and recorded.

[0036] In addition, in some implementations, the thermal diffusion coefficient, specific heat capacity and other parameters of the cable sample can also be measured by a thermal conductivity meter, which is not limited in this embodiment. It can be understood that the more comprehensive the material parameters obtained in the early stage, the more accurate the results obtained by the subsequent simulation, and accordingly, the more data needs to be processed during the simulation process, and the staff can make choices based on the actual simulation test requirements.

[0037] The test scenario refers to the simulation of the actual test environment of the cable to be tested in reality. The layout of the test scenario should be the same as the actual test environment and meet the requirements of relevant standards. In addition to cables, the test scenario generally includes various other related facilities. For example, the test scenario may include fans, combustion chambers, detection equipment, ignition sources, air outlets and other equipment and facilities.

[0038] In this embodiment, the environmental parameters refer to the specifications of the associated facilities and the parameters such as the temperature, air pressure, and fire supply duration of the actual test environment, which are the same as the various environmental parameters in the actual test environment and are all for describing the actual test environment / test scene. In some implementations, the staff can set some environmental parameters in the test scene according to the size and relative position relationship of the equipment and facilities in the actual test environment and the set ratio.

[0039] In some implementations, after obtaining material parameters and environmental parameters, a model may be built for subsequent simulation experiments.

[0040] Specifically, a scene model corresponding to the test scene can be constructed based on environmental parameters. According to the requirements of the relevant test standards for the combustion chamber, detection equipment, standard fire source (i.e., ignition source), smoke mixing device (i.e., fan), air outlet, and the relative positions of these equipment and facilities, the scene model can be established using relevant software with smoke flow simulation function, such as Pyrosim, according to the aforementioned set ratio (e.g., 1:1).

[0041] As an example, in the scenario model, the burner (i.e., the ignition source) can be simplified into a rectangular structure of 240x140x80 cubic millimeters; the fan can be simplified into a cube structure of 30x150x300 cubic millimeters, placed 1.05 meters away from the wall and the ventilation volume is set to 0.25 cubic meters per second; a light beam detector (i.e., a detection device) is set 2.15 meters above the ground to realize real-time monitoring of the optical path and visibility during cable burning; the surface type of the combustion chamber is set to an insulating surface, and an air outlet is set on the surface of the combustion chamber to ensure the balance of the atmospheric pressure inside the combustion chamber; the air pressure is set to standard atmospheric pressure, the temperature is 20°C, and the burner ignition time is 2400 seconds.

[0042] After the scenario model is established, in some implementations, a simplified cable model of the cable to be tested may be established according to the detection requirements and material parameters.

[0043] Specifically, a simplified cable model is drawn in a drawing software (such as CAD), and the two-dimensional model is stretched to a preset length, such as 1000 mm, imported into the above-mentioned scene model, and the simplified cable model is placed at a designated location according to relevant regulations.

[0044] When constructing a simplified cable model, the size of the grid can be determined based on the cable diameter in the test requirements, and the grid of the cable area can be encrypted. According to the cable structure in the test requirements and the aforementioned material parameters, the cable's outer sheath, low-smoke halogen-free flame-retardant tape, steel belt armor, copper belt shielding, insulation, conductor and other components are set, and the thermal performance data in the material parameters are used to assign the material properties corresponding to different combustible materials of the cable to be tested.

[0045] Through the above steps, a cable test model can be constructed. By constructing a corresponding cable test model through the actual test environment of the cable test and the cable to be tested, the staff can simulate the cable test through cloud computing without having to test in a real environment.

[0046] Step S120, determining the thermal decomposition equation of the cable to be tested based on the material parameters.

[0047] Step S130, inputting the thermal decomposition equation into the cable test model; In some embodiments, combustion data of the cable under test is obtained, and the combustion data is used to characterize the combustible materials involved in the combustion and the generated substances in the cable under test; based on the combustion data, at least one chemical reaction occurring when the cable under test burns is determined; based on the at least one chemical reaction, a thermal decomposition equation of the cable under test is determined.

[0048] Specifically, since the cable to be tested will undergo thermal decomposition after reaching a certain temperature under the action of an ignition source, certain chemical reactions such as combustion and decomposition will occur, thereby producing a series of smoke, gas and other substances. Therefore, the present application is designed to use thermogravimetric test analysis to pre-determine the thermal decomposition equation of the cable to be tested, thereby ensuring the accuracy of subsequent simulations.

[0049] There is more than one kind of combustible material in the cable. As an example, in addition to inorganic flame retardants, the materials that account for a large proportion in B1-class flame-retardant cables are ethylene-vinyl acetate copolymer, linear low-density polyethylene, and polymers of 1-octene and ethylene, with contents of 15-20%, 5-10%, and 5-10%, respectively. That is, ethylene-vinyl acetate copolymer accounts for the largest proportion. Therefore, when analyzing the pyrolysis reaction of the cable to be tested, the influence of ethylene-vinyl acetate copolymer on the smoke density during combustion is mainly considered. Obtain the combustion data of the pyrolysis reaction, such as ethylene-vinyl acetate copolymer participating in the chemical reaction, background gas (such as oxygen, nitrogen, etc.), and the products of the chemical reaction. After obtaining the reactants and reaction products, relevant staff can conduct research and balance to obtain the corresponding pyrolysis equation.

[0050] After the pyrolysis equation is obtained, the pyrolysis equation can be imported into the cable test model so that the cable combustion condition can be simulated more accurately in the subsequent simulation test process.

[0051] Specifically, taking the above-mentioned Pyrosim software as an example, the reactants and products involved in cable combustion can be input into the software, and a complex pyrolysis equation can be added to the cable test model under the "Reaction" label according to the pyrolysis reaction.

[0052] Step S140, start to perform simulation test, and obtain the extinction coefficient and optical path during the simulation test.

[0053] In this embodiment, if Pyrosim simulation is used, the calculation program in the Pyrosim simulation will rasterize the model. In order to ensure the accuracy of the thermal decomposition calculation of the cable area combustion, the cable area (i.e., the simplified cable model) needs to be meshed and encrypted. At the same time, in order to ensure the time of the entire model simulation calculation, the mesh can be appropriately enlarged in the area outside the cable (i.e., the scene model). After the above settings are completed, the simulation test can be started.

[0054] In this embodiment, in the PyroSim simulation, the extinction coefficient is a key parameter for calculating the visibility and hiding power of smoke, which describes the absorption and scattering ability of smoke to light.

[0055] In some embodiments, during the simulation process, multiple moments may be set according to timestamps, and at these moments, two-dimensional slice data at specified positions in the cable test model may be acquired through a detection device disposed in the cable test model.

[0056] The specified position refers to a position set by the user through the Pyrosim simulation software. Specifically, the user can create a 2D slice (i.e., a two-dimensional slice) by clicking a menu item to pop up a setting dialog box. In the dialog box, you can set the physical quantities in the two-dimensional slice data, such as the position and direction of the slice. After the settings are completed, start the simulation to obtain the corresponding two-dimensional slice data at each of the aforementioned timestamps.

[0057] In this embodiment, the optical path refers to the distance that the light beam passes through the smoke environment. In some embodiments, after the simulation is completed, for multiple moments in the entire simulation process, the light beam detection device can be used to obtain three-dimensional smoke data of the cable test model at each moment; based on the three-dimensional smoke data, the optical path at the corresponding moment is calculated.

[0058] Specifically, the user can create a 3D slice by clicking a menu item to pop up a setting dialog box, and can also set the slice position through some options, so as to obtain corresponding three-dimensional smoke data based on the 3D slice, which will not be described in detail in this embodiment.

[0059] Through the above settings, in this embodiment, after the simulation is completed, the extinction coefficient of the 2D slice corresponding to each moment in the combustion process and the cloud maps of the optical path, heat release rate, temperature, etc. in the 3D smoke can be viewed by clicking the View Results button.

[0060] Step S150, calculating the smoke density of the cable to be tested based on the extinction coefficient and the optical path.

[0061] In some embodiments, for each moment in the simulation test process, the extinction coefficient and visibility at the corresponding moment are substituted into the following expression to calculate the smoke density corresponding to the moment:

[0062] Among them, k is the extinction coefficient at that moment, L is the optical path at that moment, is the initial light transmittance in a smoke-free environment, and I is the light transmittance corresponding to that moment.

[0063] Through the above expression, when the extinction coefficient, optical path, and initial transmittance (which can be set in advance) are known, the transmittance corresponding to each moment can be calculated.

[0064] It is understandable that different cables to be tested have different standard smoke densities. In this embodiment, the minimum transmittance during the entire simulation test can be calculated as the smoke density during the cable combustion process, and this minimum value can be compared with the standard smoke density to obtain the test result of the cable to be tested.

[0065] The present embodiment provides a simulation test method, which constructs a cable test model by utilizing the material parameters of a cable to be tested and the environmental parameters of a test scene. The combustion process of the cable test model is simulated and tested by measuring the cable material parameters, measuring the environmental parameters of the test scene, and setting a chemical reaction pyrolysis equation, thereby obtaining the extinction coefficient and optical path during the combustion process. Based on the extinction coefficient and optical path, the smoke density of the cable to be tested is calculated and evaluated, thereby solving the problems of the cable smoke density test being greatly affected by the environment, high test cost, long test time, and environmental defects. The method has the beneficial effects of high result accuracy, good reliability, flexible material parameter setting, and no damage to the environment.

[0066] This application also provides a simulation test device, please refer to Figure 2 , the simulation test device 100 comprises: A model building module 110 is used to obtain material parameters of the cable to be tested and environmental parameters of the test scene to build a cable test model; An equation acquisition module 120, used to determine the thermal decomposition equation of the cable to be tested based on the material parameters; A data import module 130, for inputting the thermal solution equation into a cable test model; A simulation test module 140 is used to start executing a simulation test and obtain an extinction coefficient and an optical path length during the simulation test; The result calculation module 150 is used to calculate the smoke density of the cable to be tested based on the extinction coefficient and the optical path.

[0067] The simulation test device 100 provided in the present application, using the simulation test method in the above embodiment, can solve the technical problem of how to evaluate and test the flame retardant performance of the cable more safely and conveniently. Compared with the prior art, the beneficial effects of the simulation test device 100 provided in the present application are the same as the beneficial effects of the simulation test method provided in the above embodiment, and the other technical features in the simulation test device 100 are the same as the features disclosed in the above embodiment method, which will not be repeated here.

[0068] The present application provides a simulation test device, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the simulation test method in the above-mentioned embodiment one.

[0069] Reference below Figure 3 , which shows a schematic diagram of the structure of a simulation test device suitable for implementing the embodiment of the present application. The simulation test device in the embodiment of the present application may include but is not limited to mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 3 The simulation test device shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0070] like Figure 3 As shown, the simulation test device 200 may include a processing device 210 (such as a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM: Read Only Memory) 220 or a program loaded from a storage device 230 to a random access memory (RAM: Random Access Memory) 240. In RAM240, various programs and data required for the operation of the simulation test device are also stored. The processing device 210, ROM220 and RAM240 are connected to each other through a bus 250. An input / output (I / O) interface 260 is also connected to the bus. Generally, the following systems can be connected to the I / O interface 260: an input device 270 including, for example, a touch screen, a touch pad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; an output device 280 including, for example, a liquid crystal display (LCD: Liquid Crystal Display), a speaker, a vibrator, etc.; a storage device 230 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 290. The communication device 290 can allow the simulation test device to communicate with other devices wirelessly or wired to exchange data. Although the simulation test device with various systems is shown in the figure, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems can be implemented or provided instead.

[0071] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from the network through a communication device, or installed from the storage device 230, or installed from the ROM 220. When the computer program is executed by the processing device 210, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0072] The simulation test equipment provided by the present application, using the simulation test method in the above embodiment, can solve the technical problem of how to evaluate and test the flame retardant performance of the cable more safely and conveniently. Compared with the prior art, the beneficial effects of the simulation test equipment provided by the present application are the same as the beneficial effects of the simulation test method provided by the above embodiment, and the other technical features in the simulation test equipment are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.

[0073] It should be understood that the various parts disclosed in this application can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0074] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0075] The present application provides a computer-readable storage medium having computer-readable program instructions (ie, computer programs) stored thereon, and the computer-readable program instructions are used to execute the simulation test method in the above-mentioned embodiment.

[0076] The computer-readable storage medium provided in the present application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems or devices, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM: Random Access Memory), a read-only memory (ROM: Read Only Memory), an erasable programmable read-only memory (EPROM: Erasable Programmable Read Only Memory or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM: CD-Read Only Memory), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program, which may be used by or in combination with an instruction execution system or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency: Radio Frequency), etc., or any suitable combination of the above.

[0077] The computer-readable storage medium may be included in the simulation test device; or may exist independently without being assembled into the simulation test device.

[0078] The computer-readable storage medium carries one or more programs. When the one or more programs are executed by the simulation test device, the simulation test device can write a computer program code for performing the operation of the present application in one or more programming languages ​​or a combination thereof. The programming language includes an object-oriented programming language, such as Java, Smalltalk, C++, and a conventional procedural programming language, such as "C" language or a similar programming language. The program code can be executed entirely on the user's computer, partially on the user's computer, as an independent software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computer (for example, using an Internet service provider to connect through the Internet).

[0079] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present application. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0080] The modules involved in the embodiments described in this application may be implemented by software or hardware, wherein the name of the module does not constitute a limitation on the unit itself in some cases.

[0081] The readable storage medium provided in the present application is a computer-readable storage medium, which stores computer-readable program instructions (i.e., computer programs) for executing the above-mentioned simulation test method, and can solve the technical problem of how to evaluate and test the flame retardant performance of cables more safely and conveniently. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in the present application are the same as the beneficial effects of the simulation test method provided in the above-mentioned embodiment, and will not be elaborated here.

[0082] The present application also provides a computer program product, including a computer program, which implements the steps of the simulation test method as described above when executed by a processor.

[0083] The computer program product provided by the present application can solve the technical problem of how to evaluate and test the flame retardant performance of cables more safely and conveniently. Compared with the prior art, the beneficial effects of the computer program product provided by the present application are the same as the beneficial effects of the simulation test method provided by the above embodiment, which will not be repeated here.

[0084] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A simulation test method, characterized in that: The simulation test method comprises: Obtain the material parameters of the cable to be tested and the environmental parameters of the test scene, and build a cable test model; Determining a thermal decomposition equation of the cable to be tested based on the material parameters; Inputting the thermal solution equation into a cable test model; Starting to perform a simulation test, and obtaining an extinction coefficient and an optical path length during the simulation test; The smoke density of the cable to be tested is calculated based on the extinction coefficient and the optical path.

2. The simulation test method according to claim 1, characterized in that: The step of obtaining material parameters of the cable to be tested and environmental parameters of the test scene and constructing a cable test model includes: Obtain the material parameters of the cable to be tested and the environmental parameters of the test scene; Constructing a scene model corresponding to the test scene based on the environmental parameters, the scene model including a combustion chamber, an ignition source, and a fan; Construct a simplified cable model based on testing requirements and material parameters; The cable simplified model is imported into the scenario model to obtain the cable test model.

3. The simulation test method according to claim 1, characterized in that: The step of determining the thermal decomposition equation of the cable to be tested based on the material parameters comprises: Acquiring combustion data of the cable to be tested, wherein the combustion data is used to characterize the combustible materials involved in the combustion and the generated substances in the cable to be tested; Based on the combustion data, determining at least one chemical reaction occurring when the tested cable burns; Based on the at least one chemical reaction, a thermal decomposition equation of the cable to be tested is determined.

4. The simulation test method according to claim 1, characterized in that: The obtaining of the extinction coefficient during the simulation test includes: At each moment in the simulation test process, two-dimensional slice data at a specified position in the cable test model is obtained by a detection device arranged in the cable test model; Based on the two-dimensional slice data, the extinction coefficient corresponding to the moment is calculated.

5. The simulation test method according to claim 1, characterized in that: The obtaining of the optical path length during the simulation test includes: At each moment in the simulation test process, the distance data of the light beam of the cable test model passing through the smoke environment is obtained by using a light beam detection device arranged in the cable test model; Based on the distance data, the optical path corresponding to the moment is calculated.

6. The simulation test method according to claim 1, characterized in that: The calculating the smoke density of the cable to be tested based on the extinction coefficient and the optical path includes: For each moment in the simulation test process, the extinction coefficient and the optical path corresponding to the moment are substituted into the following expression to calculate the smoke density corresponding to the moment: Wherein, k is the extinction coefficient at the time, L is the optical path at the time, is the initial light transmittance in a smoke-free environment, and I is the light transmittance corresponding to the moment; The minimum value among the multiple light transmittances is determined as the smoke density of the cable to be tested.

7. A simulation test device, characterized in that: The simulation test device comprises: A model building module is used to obtain the material parameters of the cable to be tested and the environmental parameters of the test scene to build a cable test model; An equation acquisition module, used for determining the thermal decomposition equation of the cable to be tested based on the material parameters; A data import module, used for inputting the thermal solution equation into a cable test model; A simulation test module, used to start executing a simulation test and obtain an extinction coefficient and an optical path during the simulation test; The result calculation module is used to calculate the smoke density of the cable to be tested based on the extinction coefficient and the optical path.

8. A simulation test device, characterized in that: The simulation test device comprises: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the simulation test method according to any one of claims 1 to 6.

9. A storage medium, characterized in that: The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the simulation test method according to any one of claims 1 to 6 are implemented.

10. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is executed by a processor, the steps of the simulation test method according to any one of claims 1 to 6 are implemented.

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