A virtual simulation method and system for cross-sea environment simulation test and a medium

Abstract

The application relates to the technical field of material environmental adaptability test and virtual simulation, and discloses a virtual simulation method and system for cross-sea environment simulation test and a medium, the method comprising the following steps: acquiring environmental data of a target vehicle in a tropical, subtropical, temperate and polar navigation time period, and establishing a virtual environment model; then generating a temperature-humidity spectrum of the tropical, subtropical and temperate zones and a temperature-humidity-freezing-icing spectrum of the polar region, and forming a cross-sea environment load spectrum in a virtual simulation platform; taking corrosion electric quantity Q as a parameter, calculating equivalent conversion coefficients under different environmental conditions, and converting the duration of each environmental condition into the action time of equivalent standard conditions; combining the cross-domain navigation time curve and the zone conversion coefficient, classifying and merging the test scheme, and obtaining a virtual simulation spectrum of the cross-sea environment corrosion indoor simulation test. The application can realize comprehensive simulation of multiple sea areas, and quickly and accurately evaluate the corrosion resistance of metal materials.

Description

Technical Field

[0001] This application relates to the field of materials environmental adaptability testing and virtual simulation technology, and in particular to a virtual simulation method, system and medium for cross-ocean environment simulation testing, belonging to the interdisciplinary application field of materials environmental engineering, corrosion protection and virtual simulation testing technology. Background Technology

[0002] With the continuous development of maritime strategy, marine equipment such as ships and platforms are facing increasingly complex environmental conditions. In particular, when carrying out cross-sea missions, ships need to sail for long periods of time in extreme climates, from tropical to polar regions. This places higher demands on the performance of key materials for the equipment. Traditional outdoor exposure tests and simulation tests are mainly conducted in single environments (such as tropical or polar regions), but the complexity and variability of cross-sea missions require more comprehensive and accurate testing of materials.

[0003] Currently, environmental adaptability testing is mainly conducted through actual service environment exposure tests and indoor accelerated simulation tests. Although outdoor exposure tests can realistically reflect natural environmental conditions, they have long testing cycles, are greatly affected by uncontrollable factors, and cannot complete a comprehensive simulation of cross-oceanic environmental conditions in a short period of time. While existing indoor accelerated testing technologies have yielded research results in tropical marine environments, they lack comprehensive simulation of cross-oceanic environments, making it impossible to fully evaluate the corrosion resistance of materials in tropical, subtropical, temperate, and polar regions. Therefore, there is an urgent need for an efficient and accurate indoor simulation method that can simulate various marine environmental conditions to help assess the durability of marine equipment in complex environments. Summary of the Invention

[0004] To address the aforementioned technical issues, this application provides a virtual simulation method, system, and medium for cross-oceanic environmental simulation testing. The aim is to rapidly and accurately assess the corrosion resistance of metallic materials by simulating various marine environmental conditions in tropical, subtropical, temperate, and polar regions through a virtual simulation platform.

[0005] Firstly, this application provides a virtual simulation method for cross-oceanic environment simulation experiments, the method comprising: Step S1: Obtain actual environmental data of the target vehicle during its flight time in tropical, subtropical, temperate and polar sea atmospheric environments. The environmental data includes temperature, humidity and freeze-thaw and freezing data in polar environments, and establish a corresponding virtual environment model. Step S2: Based on the environmental data, generate temperature-humidity spectra for tropical, subtropical and temperate marine atmospheric environments, as well as temperature-humidity-freeze-thaw-freeze spectra for polar marine atmospheric environments, and form cross-oceanic environmental load spectra in the virtual simulation platform. Step S3: Using corrosion charge Q as a parameter, conduct corrosion electrochemical tests under virtual simulation conditions, calculate the corrosion charge under different environmental conditions and the corrosion charge under standard humid air or standard salt spray conditions, and compare them to obtain the equivalent conversion factor. Step S4: Based on the equivalent conversion factor, the duration of each environmental condition is converted into the action time of the equivalent standard condition to form a virtual simulation accelerated test scheme for tropical, subtropical, temperate and polar regions. Step S5: Combining the cross-domain navigation time curve and the conversion coefficient of each zone, the test schemes are classified and merged to generate an optimized virtual simulation spectrum for the cross-oceanic environmental corrosion indoor simulation test.

[0006] Secondly, this application provides a virtual simulation system for cross-ocean environment simulation experiments, the system comprising: The acquisition unit is used to acquire actual environmental data of the target vehicle during the navigation period in tropical, subtropical, temperate and polar sea atmospheric environments. The environmental data includes temperature, humidity and freeze-thaw and freezing data in polar environments, and establishes a corresponding virtual environment model. The generation unit is used to generate temperature-humidity spectra under the atmospheric conditions of tropical, subtropical and temperate sea areas, as well as temperature-humidity-freeze-thaw-freeze spectra under the atmospheric conditions of polar sea areas, based on the environmental data, and to form a cross-sea area environmental load spectrum in the virtual simulation platform. The conversion unit is used to conduct corrosion electrochemical tests under virtual simulation conditions with corrosion charge Q as a parameter. It calculates the corrosion charge under different environmental conditions and compares it with the corrosion charge under standard humid air or standard salt spray conditions to obtain the equivalent conversion factor. The test unit is used to convert the duration of each environmental condition into the action time of the equivalent standard condition based on the equivalent conversion factor, so as to form a virtual simulation accelerated test scheme for tropical, subtropical, temperate and polar regions. The optimization unit is used to classify and merge the test schemes by combining the cross-domain navigation time curves and the conversion coefficients of each zone, and generate the optimized virtual simulation spectrum of the cross-sea environmental corrosion indoor simulation test.

[0007] A third aspect of this application provides a computer-readable storage medium storing instructions that, when executed on a computer, cause the computer to perform the aforementioned virtual simulation method for a cross-ocean environment simulation experiment.

[0008] Compared with the prior art, the beneficial effects of the present invention are at least as follows: The technical solution of this application constructs typical environmental spectra of tropical, subtropical, temperate and polar regions in a virtual simulation platform to achieve comprehensive reproduction of atmospheric conditions in different sea areas, thereby accumulating and dynamically analyzing key environmental data; using corrosion charge Q as an equivalent conversion parameter, the equivalent conversion coefficient is calculated in real time according to material characteristics to form a corresponding virtual simulation accelerated test scheme. This conversion coefficient varies with material differences, thus being more targeted and accurate.

[0009] Meanwhile, by introducing cross-domain navigation time curves, this invention transforms the complex navigation environment into quantifiable zone conversion coefficients, and classifies and optimizes multi-zone test schemes on a virtual simulation platform, merging tropical, subtropical, and temperate test schemes, and integrating test schemes from different polar stations into one, thereby generating a more concise and reasonable cross-domain simulation load spectrum.

[0010] Therefore, this invention not only solves the problem that traditional indoor simulation accelerated test spectrum cannot cover extreme navigation conditions with large seasonal variations, but also shortens the test cycle, reduces the dependence on actual sea exposure tests, and improves the scientificity and operability of environmental simulation. This application can provide efficient and reliable technical support for the life assessment of ships and other marine equipment in complex service environments, and has important engineering practice value and prospects for promotion and application. Attached Figure Description

[0011] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of an embodiment of a virtual simulation method for cross-oceanic environment simulation test in this application. Figure 2 This is a schematic diagram of an indoor accelerated simulation test in tropical, subtropical, or temperate zones, as described in the embodiments of this application. Figure 3 This is a schematic diagram of the polar indoor simulation acceleration test in the embodiments of this application; Figure 4 This is a schematic diagram of the sailing time curve of the Xue Long icebreaker's 41st Antarctic scientific expedition in the embodiments of this application; Figure 5 This is a simplified diagram of the transdomain marine environmental load spectrum of the Xue Long icebreaker's 41st Antarctic scientific expedition voyage time curve in the embodiments of this application. Figure 6 This is a schematic diagram of the accelerated indoor simulation test scheme for cross-domain marine atmospheric environment corrosion in the embodiments of this application; Figure 7 This is a schematic diagram of the virtual simulation spectrum of the optimized cross-oceanic environmental corrosion indoor simulation test in the embodiments of this application; Figure 8 This is a schematic diagram showing the comparison of corrosion rates of NiCrMoV steel after one cycle of indoor accelerated corrosion and one year of outdoor exposure in the embodiments of this application. Figure 9 This is a schematic diagram illustrating the indoor-outdoor correlation results obtained from the proportion of corrosion products of NiCrMoV steel in the embodiments of this application. Figure 10 This is a schematic diagram illustrating the indoor-outdoor correlation results of the localized corrosion depth of NiCrMoV steel in the embodiments of this application; Figure 11 This is a schematic diagram of one embodiment of a virtual simulation system for cross-ocean environment simulation test in this application. Detailed Implementation

[0013] This application provides a virtual simulation method, system, and medium for cross-oceanic environment simulation testing. The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than that illustrated or described herein. Furthermore, the terms "comprising" or "having" and any variations thereof are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or device that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or devices.

[0014] For ease of understanding, the specific process of the embodiments of this application is described below. Please refer to [link / reference]. Figure 1 One embodiment of a virtual simulation method for cross-ocean environment simulation experiments in this application includes: Step S1: Obtain actual environmental data of the target vehicle during its navigation in tropical, subtropical, temperate and polar sea atmospheric environments. The environmental data includes temperature, humidity and freeze-thaw and freezing data in the polar environment, and establish a corresponding virtual environment model. Among them, the freeze-thaw data in the polar environment is the daily maximum temperature Tmax > 0℃ and the daily minimum temperature Tmin < -1.9℃, and the freezing data is the daily maximum temperature Tmax < -10℃.

[0015] Specifically, in this embodiment, the target vehicle is a ship, which acquires the actual environmental data of the ship during the time period of navigation in the tropical-polar cross-ocean atmospheric environment. The environmental data for tropical, subtropical and temperate zones include temperature and humidity; the environmental data for polar regions includes temperature, humidity, freeze-thaw and freezing. Freeze-thaw data can also be called freeze-thaw conditions, and freezing data can also be called freezing conditions.

[0016] Step S2: Based on environmental data, generate temperature-humidity spectra for tropical, subtropical, and temperate marine atmospheric environments, as well as temperature-humidity-freeze-thaw-freeze spectra for polar marine atmospheric environments, and form cross-oceanic environmental load spectra in a virtual simulation platform. The humidity spectrum in the environmental spectrum is in hourly units.

[0017] Specifically, Table 1 shows the actual environmental data of the ship during its voyage in tropical waters, converted into temperature-humidity spectrum data; Table 2 shows the actual environmental data of the ship during its voyage in subtropical waters, converted into temperature-humidity spectrum data; Table 3 shows the actual environmental data of the ship during its voyage in temperate waters, converted into temperature-humidity spectrum data; and Table 4 shows the actual environmental data of the ship during its voyage in polar waters, converted into temperature-humidity-freeze-thaw-freeze spectrum data.

[0018] Table 1: Atmospheric Temperature-Humidity Spectrum of Tropical Seas Table 2: Atmospheric Temperature-Humidity Spectrum of Subtropical Sea Areas Table 3: Atmospheric Temperature-Humidity Spectrum of Temperate Sea Areas Table 4: Atmospheric Environmental Temperature-Humidity-Freeze-Thaw-Freeze Spectrum in Polar Seas The data in Tables 1, 2, 3, and 4 represent durations, denoted by t, in hours. RH represents the humidity spectrum. For example, in Table 1, 25℃ and RH=70% correspond to 614.95 hours, meaning that the ship remained under these temperature and humidity conditions for 614.95 hours during the navigation period.

[0019] Step S3: Using the corrosion charge Q as a parameter, perform equivalent conversion. Conduct corrosion electrochemical experiments under virtual simulation conditions, calculating the corrosion charge under tropical, subtropical, temperate, and polar marine atmospheric conditions and comparing it with the corrosion charge under standard humid air or standard salt spray conditions, and obtaining the equivalent conversion factor. The virtual simulation conditions are based on the environmental conditions listed in Tables 1, 2, 3, and 4, arranged and combined, with corresponding environmental parameters set in the laboratory for the experiment; where the corrosion charge Q of the metal is expressed by Formula 1: (Formula 1) Where Q represents the corrosion charge, t represents the duration, I(t) represents the corrosion current for duration t, F represents the Faraday constant, and t1 and t2 represent specific time intervals.

[0020] Specifically, for the temperature-humidity spectra of tropical, subtropical, and temperate zones, corrosion electrochemical tests are conducted to calculate the corrosion charge Q generated under different temperature and humidity conditions within a specific time period (t1 to t2) in the target environment of the above-mentioned marine atmospheric temperature-humidity spectrum, and the corresponding current under the target environment is I; in standard humid air (T=40℃, RH=90%), where T represents temperature and RH represents humidity spectrum, corrosion electrochemical tests are conducted to calculate the corrosion charge Q' generated within a specific time period (t1' to t2'), and the corresponding current under standard humid air or standard salt spray conditions is I'; according to the principle of equal corrosion damage, Q=Q' is made to obtain the equivalent conversion factor, which is expressed by Formula 2: (Formula 2) in, I represents the equivalent conversion factor, I represents the corrosion current under the target environment, and I' represents the corrosion current under standard humid air or standard salt spray conditions. The target environment refers to the different environments in which the corrosion electrochemical test is conducted. In addition, unless otherwise specified in the text, the "equivalent conversion factor" is simply referred to as the "conversion factor".

[0021] Table 5: Equivalent Conversion Factors of Atmospheric Temperature-Humidity Spectrum in Tropical Seas The data in Table 5 are conversion factors. For example, the conversion factor for a temperature of 25℃ and RH=70% is 0.14540, which means that the ratio of I corresponding to 25℃ and RH=70% to I' corresponding to standard humid air at 40℃ and RH=90% is 0.14540.

[0022] Table 6: Equivalent Conversion Factors of Atmospheric Temperature-Humidity Spectrum in Subtropical Seas Table 7: Equivalent Conversion Factors for Atmospheric Temperature-Humidity Spectrum in Temperate Sea Areas For the temperature-humidity spectra of tropical, subtropical, and temperate zones, the conversion factors of NaCl solutions with different mass fractions to standard humid air are calculated using the above-mentioned method of equal corrosion charge Q for different material grades, as shown in Table 8 below. In addition, when necessary, equivalent conversion factors can be calculated separately for different material grades to form a material-specific virtual simulation accelerated testing scheme.

[0023] Table 8: Conversion factors of NaCl solutions with different mass fractions to standard moist air For the temperature and humidity components of the polar temperature-humidity-freeze-thaw-freeze spectrum, corrosion electrochemical experiments are conducted to calculate the electrical charge Q generated under different temperature and humidity conditions within a specific time period (t1 to t2) in the polar marine atmospheric temperature-humidity spectrum, with the corresponding current I under the target environment. In humid air with 5% NaCl, T=10℃, and RH=90%, corrosion electrochemical experiments are performed to generate the electrical charge Q' within a specific time period (t1' to t2'), with the corresponding electrical charge I' under standard humid air or standard salt spray conditions. Following the principle of equal corrosion damage, Q=Q', yielding the equivalent conversion factor: (Formula 2) Table 9: Equivalent Conversion Factors for Atmospheric Temperature-Humidity Spectrum in Polar Seas For the freeze-thaw component of the temperature-humidity-freeze-thaw-freeze spectrum in the polar regions, the freeze-thaw conversion factor is calculated as follows: In the polar summer, a freeze-thaw cycle occurs once a day. After corrosion at -5℃ for 6 hours, the temperature is raised to 5℃ for 18 hours of corrosion. The corrosion charge Q is obtained by continuously recording the corrosion current change over 24 hours using an electrochemical corrosion test. The accelerated laboratory conditions are corrosion at -10℃ for 2 hours, followed by a temperature rise to 10℃ for 2 hours of corrosion. The corrosion charge Q is also obtained by continuously recording the temperature using an electrochemical corrosion test. Therefore, the experimental conditions of corrosion at -10℃ for 2 hours followed by a temperature rise to 10℃ for 2 hours can simulate a day of freeze-thaw in the polar regions.

[0024] For the frozen portion of the temperature-humidity-freeze-thaw-freeze spectrum in the polar regions, corrosion will not occur because the temperature is too low, resulting in low electrochemical activity for material corrosion.

[0025] Step S4: Based on the equivalent conversion factor, the duration of each environmental condition is converted into the action time of the equivalent standard condition to form a virtual simulation accelerated test scheme for tropical, subtropical, temperate and polar regions; among them, when conducting the polar freeze-thaw simulation of the virtual simulation accelerated test, the accelerated condition of corrosion at -10℃ for 2 hours followed by heating to 10℃ for 2 hours is adopted to equivalently simulate the freeze-thaw process of one day in polar summer.

[0026] Among them, the virtual simulation accelerated test schemes for tropical, subtropical and temperate zones convert the duration of each temperature and humidity condition into the equivalent action time under the conditions of 5% NaCl solution, 40℃ and RH=90% by multiplying the duration of each temperature and humidity condition with the corresponding equivalent conversion factor and summing them.

[0027] The polar virtual simulation acceleration test scheme includes: Salt spray accelerated corrosion simulation under conditions of 5% NaCl, 10℃, and RH=90%; Simulated in a freeze-thaw cycle alternating between -10℃×2h and 10℃×2h; Low-temperature freezing simulation under the lowest polar temperature conditions.

[0028] Specifically, for tropical, subtropical, and temperate regions, based on their marine atmospheric temperature-humidity spectrum and corresponding equivalent conversion factor tables, the duration of each temperature and humidity condition is multiplied by its corresponding conversion factor, and the results are summed to calculate the total temperature-humidity duration of each sea area equivalent to the duration of exposure to standard humid air at T=40℃ and RH=90%. 热 t 亚热 and t 温 .

[0029] The duration of action t 热 t 亚热 and t 温 Multiplying the conversion factor for 5% NaCl in the table of conversion factors for NaCl solutions of different mass fractions to standard humid air, the total temperature-humidity duration t for each sea area is calculated as the equivalent exposure time t of standard humid air at 5% NaCl, T=40℃, and RH=90%. 热 t 亚热 and t 温 ,like Figure 2 The tropical, subtropical or temperate indoor accelerated simulation tests shown in this application, in which lowercase t represents time or duration and uppercase T represents temperature.

[0030] For the polar regions, based on the temperature-humidity spectrum of their marine atmospheric environment and its corresponding equivalent conversion factor table, the duration of each temperature and humidity condition is multiplied by its corresponding conversion factor, and the results are added together to calculate the total temperature-humidity duration (t) of each marine region equivalent to the exposure time (t) of standard humid air at 5% NaCl, T=10℃, and RH=90%. 极 ,like Figure 3 The polar indoor simulation acceleration test shown.

[0031] For the polar regions, the freeze-thaw duration (in days) in the atmospheric environmental temperature-humidity-freeze-thaw-freeze spectrum of polar seas is t. 冻融 Multiply (days) by 4 to get the freeze-thaw acceleration time (in hours), t 冻融 (Hour): t 冻融 (hours) = t 冻融 (days) × 4; For polar regions, the freezing test temperature is the lowest temperature Tmin, and the freezing duration in the atmospheric temperature-humidity-freeze-thaw-freeze spectrum of polar seas is t. 冰冻 (days), then the freezing acceleration time is t. 冰冻 (Hour): t 冰冻 (hours) = [t] 极 +t 冻融 (hours)] / [1-t 冰冻 (days) / 365] [t 冰冻 (days) / 365].

[0032] Step S5: Combining the cross-domain navigation time curves with the conversion coefficients of each zone, the test schemes are classified and merged to generate an optimized virtual simulation spectrum for the cross-oceanic environmental corrosion indoor simulation test; wherein, the cross-domain navigation time curves are constructed from actual navigation records, and the proportion of navigation time in each zone to the total annual time is used as the conversion coefficient.

[0033] Specifically, each zone represents any one of the following regions: tropical, subtropical, temperate, and polar; a time-of-voyage curve is established using the 41st Antarctic expedition of the Xue Long icebreaker as an example, such as... Figure 4 As shown.

[0034] The zones involved in the trans-regional navigation were initially categorized, namely, the southern and northern temperate zones were merged, and the southern and northern subtropical zones were merged. The aforementioned navigation time curves were then simplified into a trans-regional marine environmental load spectrum for the navigation, such as... Figure 5 As shown.

[0035] Based on the specific duration of the marine environment in each zone, the above navigation time curves are simplified into conversion coefficients for the atmospheric environment of each sea area. The conversion coefficient refers to the navigation time (navigation duration) t in each zone. 航行时间 The proportion of the total year is shown in the following formula. Table 10 shows the conversion coefficients for different zones along the route of the 41st polar scientific expedition. .

[0036] Table 10: Conversion Coefficients of Different Zones along the Route of the 41st Polar Scientific Expedition The previous section developed indoor accelerated simulation test protocols for atmospheric environments in tropical, subtropical, temperate, and polar seas: ① Temperate marine environment (Qingdao) can be converted into tons. 温 Neutral salt spray test (5% NaCl, 40℃, RH=90%). ② The subtropical marine environment (Xiamen) can be converted into tons. 亚热 Neutral salt spray test (5% NaCl, 40℃, RH=90%). ③ Tropical marine environment (Xisha Islands) can be converted into tons. 热 Neutral salt spray test (5% NaCl, 40℃, RH=90%).

[0037] ④ Zhongshan Station in the Arctic: T 极-中山 Salt spray test (5% NaCl, 10℃, RH=90%) + t 冻融-中山 Freeze-thaw cycle test (-10℃×2h+10℃×2h)+t 冰冻-中山 Low-temperature freezing test; ⑤ McMurdo Station in the Arctic: t 极-麦克默多 Salt spray test (5% NaCl, 10℃, RH=90%) + t 冻融-麦克默多 Freeze-thaw cycle test (-10℃×2h+10℃×2h)+t 冰冻-麦克默多 Low-temperature freezing test; ⑥ Polar Great Wall Station: t 极-长城 Salt spray test (5% NaCl, 10℃, RH=90%) + t 冻融-长城 Freeze-thaw cycle test (-10℃×2h+10℃×2h)+t 冰冻-长城 Low-temperature freezing test; Based on the conversion coefficient table for different zones and the indoor accelerated simulation test schemes for atmospheric environments in tropical, subtropical, temperate, and polar seas, the trans-domain marine environmental load spectrum of the above-mentioned voyages is transformed into an indoor accelerated simulation test scheme for trans-domain marine atmospheric corrosion, such as... Figure 6 As shown.

[0038] The tropical, subtropical, and temperate indoor simulation accelerated test schemes in the above-mentioned cross-domain marine atmospheric environment corrosion accelerated test schemes are categorized and merged. The accelerated test schemes at Zhongshan Station, McMurdo Station, and Great Wall Station in the polar region are also categorized and merged. This results in an optimized cross-domain marine environmental load spectrum, which is transformed into a cross-domain marine atmospheric environment corrosion indoor simulation accelerated test spectrum, i.e., a virtual simulation spectrum for cross-oceanic environmental corrosion indoor simulation tests. Figure 7 As shown, where Figure 7 In this context, A, B, C, D, and n represent the following: ; ; This indicates that each polar internal cycle involves 3 freeze-thaw cycles. ; .

[0039] The following are the results of a corrosion rate comparison test based on this application: The specific numerical results of the study on the correlation between indoor and outdoor corrosion rates of NiCrMoV steel are shown in Table 11. Figure 8 The corrosion rates of NiCrMoV steel after one cycle of indoor accelerated testing and one year of outdoor natural environment exposure are 76.81 and 83.26 μm / year, respectively, with a ratio of 92.25% and a correlation of 92.25%.

[0040] Table 11: Comparison of Correlation between Correlation Rates The following are the results of comparative tests on corrosion products based on this application: like Figure 9 As shown in Table 12, the correlation between indoor and outdoor corrosion products of NiCrMoV steel shows that the products after indoor accelerated corrosion and outdoor exposure tests of NiCrMoV steel are the same, consisting of non-protective non-corrosion product β-FeOOH and protective products α-FeOOH and Fe3O4. The proportions of non-protective corrosion products under the two test conditions are 48.2% and 57.8%, respectively, with a ratio of 83.4% and a correlation of 83.4%. The proportions of protective corrosion products under the two test conditions are 51.8% and 42.2%, respectively, with a ratio of 81.5% and a correlation of 81.5%.

[0041] Table 12: Correlation Comparison of Corrosion Product Content The following are the results of corrosion depth comparison tests based on this application: Based on multi-region sampling statistical analysis, three parallel samples were selected for each material sample, and at least four independent regions were randomly selected for measurement for each parallel sample to ensure the representativeness and statistical reliability of the data. Figure 10 The results of local corrosion depth after one cycle of indoor accelerated corrosion of NiCrMoV steel and after one year of outdoor exposure were compared. The specific numerical results are given in Table 13. The average local corrosion depth of NiCrMoV steel in indoor accelerated corrosion and outdoor exposure tests were 127.66 and 153.96 μm, respectively, with a ratio of 82.9%, which meets the correlation index of 82.9%.

[0042] Table 13: Comparison of corrosion depth under different test environments The above describes a virtual simulation method for a cross-oceanic environment simulation test according to an embodiment of this application. The following describes a virtual simulation system for a cross-oceanic environment simulation test according to an embodiment of this application. Please refer to [link / reference]. Figure 11 One embodiment of a virtual simulation system for cross-ocean environment simulation experiments in this application includes: The acquisition unit is used to acquire actual environmental data of the target vehicle during its flight time in tropical, subtropical, temperate and polar sea atmospheric environments. The environmental data includes temperature, humidity and freeze-thaw and freezing data in polar environments, and establishes corresponding virtual environment models. The generation unit is used to generate temperature-humidity spectra under the atmospheric conditions of tropical, subtropical and temperate sea areas, as well as temperature-humidity-freeze-thaw-freeze spectra under the atmospheric conditions of polar sea areas, based on environmental data, and to form cross-sea environmental load spectra in the virtual simulation platform. The conversion unit is used to conduct corrosion electrochemical tests under virtual simulation conditions with corrosion charge Q as a parameter. It calculates the corrosion charge under different environmental conditions and compares it with the corrosion charge under standard humid air or standard salt spray conditions to obtain the equivalent conversion factor. The test unit is used to convert the duration of each environmental condition into the action time of the equivalent standard condition based on the equivalent conversion factor, so as to form a virtual simulation accelerated test scheme for tropical, subtropical, temperate and polar regions. The optimization unit is used to classify and merge the test schemes by combining the cross-domain navigation time curves and the conversion coefficients of each zone, and generate the optimized virtual simulation spectrum of the cross-sea environmental corrosion indoor simulation test.

[0043] This application also provides a computer-readable storage medium, which can be a non-volatile computer-readable storage medium or a volatile computer-readable storage medium, wherein the computer-readable storage medium stores instructions that, when executed on a computer, cause the computer to perform the steps of the virtual simulation method for a cross-ocean environment simulation test.

[0044] In summary, this invention can generate test spectra covering multiple typical environments such as tropical, subtropical, temperate and polar regions in a virtual environment, and can predict and evaluate the corrosion resistance of materials in complex cross-ocean environments without relying on long-term natural exposure, thereby achieving rapid and accurate assessment of the corrosion resistance of metallic materials.

[0045] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0046] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0047] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A virtual simulation method for cross-oceanic environment simulation experiments, characterized in that, The method includes: Step S1: Obtain actual environmental data of the target vehicle during its flight time in tropical, subtropical, temperate and polar sea atmospheric environments. The environmental data includes temperature, humidity and freeze-thaw and freezing data in polar environments, and establish a corresponding virtual environment model. The freeze-thaw data in the polar environment are defined as daily maximum temperature Tmax > 0℃ and daily minimum temperature Tmin < -1.9℃, and the freezing data are defined as daily maximum temperature Tmax < -10℃. Step S2: Based on the environmental data, generate temperature-humidity spectra for tropical, subtropical and temperate marine atmospheric environments, as well as temperature-humidity-freeze-thaw-freeze spectra for polar marine atmospheric environments, and form cross-oceanic environmental load spectra in the virtual simulation platform. Step S3: Using corrosion charge Q as a parameter, conduct corrosion electrochemical tests under virtual simulation conditions, calculate the corrosion charge under different environmental conditions and the corrosion charge under standard humid air or standard salt spray conditions, and compare them to obtain the equivalent conversion factor. Step S4: Based on the equivalent conversion factor, the duration of each environmental condition is converted into the action time of the equivalent standard condition to form a virtual simulation accelerated test scheme for tropical, subtropical, temperate and polar regions. Step S5: Combining the cross-domain navigation time curve and the conversion coefficient of each zone, the test schemes are classified and merged to generate an optimized virtual simulation spectrum for the cross-ocean environment corrosion indoor simulation test. The cross-domain voyage time curve is constructed from actual voyage records, and the proportion of voyage time in each zone to the total annual time is used as a conversion coefficient.

2. The method according to claim 1, characterized in that, The corrosion charge Q is calculated as shown in Formula 1 below: (Official 1) In Formula 1, Q represents the corrosion charge, t represents the duration, I(t) represents the corrosion current for duration t, F represents the Faraday constant, and t1 and t2 represent specific time intervals.

3. The method according to claim 1, characterized in that, The equivalent conversion factor α is expressed by Formula 2: (Official 2) Among them, in formula 2 I represents the equivalent conversion factor, I represents the corrosion current under the target environment, and I' represents the corrosion current under standard humid air or standard salt spray conditions.

4. The method according to claim 1, characterized in that, When performing polar freeze-thaw simulations, the virtual simulation platform uses accelerated conditions of corrosion at -10℃ for 2 hours followed by heating to 10℃ for 2 hours to equivalently simulate a day's freeze-thaw process in the polar summer.

5. The method according to claim 1, characterized in that, The virtual simulation accelerated test scheme for tropical, subtropical and temperate zones calculates the equivalent exposure time under the conditions of 5% NaCl solution, 40℃, and RH=90% by multiplying the duration of each temperature and humidity condition with the corresponding equivalent conversion factor and summing them.

6. The method according to claim 1, characterized in that, The virtual simulation acceleration test scheme for the polar regions includes: Salt spray accelerated corrosion simulation under conditions of 5% NaCl, 10℃, and RH=90%; Simulated in a freeze-thaw cycle alternating between -10℃×2h and 10℃×2h; Low-temperature freezing simulation was conducted under polar freezing conditions, where the freezing conditions were the ambient temperatures corresponding to the daily maximum temperature Tmax < -10℃.

7. A virtual simulation system for cross-oceanic environment simulation experiments, used to implement the virtual simulation method for cross-oceanic environment simulation experiments as described in any one of claims 1-6, characterized in that, The system includes: The acquisition unit is used to acquire actual environmental data of the target vehicle during the navigation period in tropical, subtropical, temperate and polar sea atmospheric environments. The environmental data includes temperature, humidity and freeze-thaw and freezing data in polar environments, and establishes a corresponding virtual environment model. The generation unit is used to generate temperature-humidity spectra under the atmospheric conditions of tropical, subtropical and temperate sea areas, as well as temperature-humidity-freeze-thaw-freeze spectra under the atmospheric conditions of polar sea areas, based on the environmental data, and to form a cross-sea area environmental load spectrum in the virtual simulation platform. The conversion unit is used to conduct corrosion electrochemical tests under virtual simulation conditions with corrosion charge Q as a parameter. It calculates the corrosion charge under different environmental conditions and compares it with the corrosion charge under standard humid air or standard salt spray conditions to obtain the equivalent conversion factor. The test unit is used to convert the duration of each environmental condition into the action time of the equivalent standard condition based on the equivalent conversion factor, so as to form a virtual simulation accelerated test scheme for tropical, subtropical, temperate and polar regions. The optimization unit is used to classify and merge the test schemes by combining the cross-domain navigation time curves and the conversion coefficients of each zone, and generate the optimized virtual simulation spectrum of the cross-sea environmental corrosion indoor simulation test.

8. A computer-readable storage medium storing instructions thereon, characterized in that, When the instruction is executed by the processor, it implements a virtual simulation method for cross-sea environment simulation test as described in any one of claims 1-6.

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