A test method for simulating the influence of the sand and wind environment on the surface of Mars on the material properties
Through wind and sand motion simulation calculation procedures and wind tunnel tests, Mars environmental parameters were simulated, and the problem of being unable to simulate Mars wind and sand environment on Earth was solved, and effective evaluation and analysis of material performance changes was achieved.
Patent Information
- Application Number
- CN202211721749.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-12-30
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2042-12-30
AI Technical Summary
The existing technology cannot simulate the wind and sand environment on the surface of Mars on Earth, resulting in the inability to conduct effective research on the performance changes of materials in the wind and sand environment on Earth.
By using wind and sand motion simulation calculation procedures and wind tunnel tests, the environmental parameters of the Earth and Mars are simulated, and the input parameters of the wind tunnel test are adjusted to simulate sand particle motion under ground conditions, and continuous sand blowing experiments are carried out on the sample materials.
It has realized the simulation of the wind and sand environment on the Mars surface in the ground environment, and effectively evaluated and analyzed the changes in material properties, solving the problem of the inability to simulate the wind and sand environment on the Mars on the earth.
Smart Images
Figure CN116052812B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of spacecraft material engineering, and particularly relates to a test method for simulating the influence of the sand and dust environment on the surface of Mars on the performance of materials. Background Art
[0002] When carrying out Mars exploration missions, not only do we need to face environmental factors such as vacuum, high and low temperatures, ultraviolet radiation, and particle radiation that are encountered in conventional space exploration missions, but we also need to solve the space dust environment that we face for the first time. The dry Martian atmosphere often blows a large amount of sand and dust, which not only impacts the surface of the detector but also generates static electricity due to friction and adheres to the surface of the device, affecting the performance of the device or material. Flexible thin film materials are widely used in space missions due to their advantages such as light weight and foldable storage. Especially for Mars exploration missions that are far away and have high launch costs, they are widely used. Currently, flexible thin film materials are used as structure, thermal control, protection and other materials in the Mars exploration of various countries, and will also be one of the main materials for extraterrestrial living cabins in the future. Sandstorms frequently occur on the surface of Mars, with high wind speeds and large sand transport volumes, which have a great impact on devices. Due to the huge differences in parameters such as gravity and air density between Mars and the Earth, there are currently no devices and methods that can simulate the sand and dust environment on the surface of Mars, nor can relevant research on the performance changes of materials in the sand and dust environment on Mars be carried out on Earth. Summary of the Invention
[0003] In view of this, the present invention provides a test method for simulating the influence of the sand and dust environment on the surface of Mars on the performance of materials, which can simulate the sand and dust environment on the surface of Mars in a ground environment and can evaluate the performance changes of materials in the sand and dust environment on Mars in a ground environment.
[0004] To achieve the above object, the technical solution of the present invention includes the following steps
[0005] Step (1): Using a sand and dust movement simulation calculation program, set the experimental environment as Earth conditions, that is, set the atmospheric density and gravity in the environmental parameters of the program to be the same as those of Earth conditions; using the sand and dust movement simulation calculation program, simulate the near-surface sand grain saltation under Earth conditions, and according to the near-surface sand grain saltation law under Earth conditions, set the program input under Earth conditions. The program input includes the sand supply particle size distribution and the axial wind speed, and calculate the sand grain velocity, particle size distribution, and sand transport volume in a specified area as the program output under Earth conditions.
[0006] Step (2): Use the same sand supply particle size distribution and axial wind speed as the program input under Earth conditions as the wind tunnel input for the wind tunnel test. During the wind tunnel test, use a real-time monitoring device to measure the wind tunnel output corresponding to the same area as the specified area described in step 1. The wind tunnel output includes: sand grain velocity, particle size distribution, and sand transport volume.
[0007] In step (3), the sand movement simulation calculation program is corrected by the wind tunnel output of the wind tunnel test to obtain a program matching the wind tunnel.
[0008] In step (4), the test environment of the program matching the wind tunnel is set to Martian conditions, that is, the atmospheric density and gravity in the environmental parameters of the program are set to be consistent with Martian conditions.
[0009] According to the sand grain movement under Martian conditions, the program input quantities are set, including the sand supply particle size distribution and the axial wind speed, and the sand grain speed, particle size distribution, and sediment transport rate in the specified area are calculated as the program output under Martian conditions.
[0010] In step (5), a wind tunnel test is carried out, and the input parameters of the wind tunnel test are adjusted, including the axial wind speed and the particle size distribution. The corresponding wind tunnel output in the specified area is measured in real time to obtain the range of input parameters of the wind tunnel test that makes the wind tunnel output consistent with the program output under Martian conditions in step (4), including the range of axial wind speed and the range of particle size distribution.
[0011] The input parameters of the wind tunnel test are adjusted within the range of the axial wind speed and the particle size distribution to enable the wind tunnel to output the same sand grain speed, particle size distribution, and sediment transport rate under ground conditions as under Martian conditions.
[0012] In step (6), a reasonable sand blowing time is set according to the range of the axial wind speed and the particle size distribution, and a continuous sand blowing experiment is carried out on the sample material in the wind tunnel.
[0013] Further, after step (6), the method further includes the following steps:
[0014] In step (7), some samples of the sample material after being tested under different parameters are taken for various test analyses, including analyzing the morphology of the sample surface after being impacted by sand grains using a scanning electron microscope and an atomic force microscope, testing the optical properties of the sample after the test using an ultraviolet-visible spectrophotometer and a Fourier transform infrared spectrometer, and testing the surface conductivity of the sample using a high resistance meter to analyze the performance changes of the material under the simulated Martian sandstorm environment.
[0015] Beneficial effects:
[0016] An experimental method for simulating the influence of the sand and wind environment on the surface of Mars on the material properties provided by the present invention. First, a simulation calculation program for sand and wind movement is used to simulate the saltation of near-surface sand grains under Earth conditions. Then, a wind tunnel test is carried out. With the same input quantity, the simulation calculation program for sand and wind movement is corrected by using the output quantity of the wind tunnel to obtain a program matching the wind tunnel. Again, the test environment of the program matching the wind tunnel is set to Mars conditions. According to the sand grain movement under Mars conditions, the program input quantity is set to obtain the program output quantity under Mars conditions. A wind tunnel test is carried out, the input parameters of the wind tunnel test are adjusted, and the wind tunnel output quantity corresponding to the specified area is measured in real time to obtain the range of the input parameters of the wind tunnel test that makes the wind tunnel output quantity consistent with the program output quantity under Mars conditions. Then, a reasonable sand blowing time is set according to this range, and the sample material is continuously sand blown in the wind tunnel. The performance changes of the sample are analyzed, tested and evaluated. The experimental method involved in the present invention can simulate the sand and wind environment on the surface of Mars in a ground environment; the experimental method involved in the present invention can evaluate the performance changes of materials in the sand and wind environment on Mars in a ground environment. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a flowchart of an experimental method for simulating the influence of the sand and wind environment on the surface of Mars on the material properties provided by the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0018] The present invention will be described in detail below with reference to the accompanying drawings and by way of examples.
[0019] The present invention provides an experimental method for simulating the influence of the sand and wind environment on the surface of Mars on the material properties, including the following steps:
[0020] Step (1): Using a simulation calculation program for sand and wind movement, set the experimental environment to Earth conditions, that is, set the atmospheric density and gravity in the environmental parameters of the program to be consistent with Earth conditions; use the simulation calculation program for sand and wind movement to simulate the saltation of near-surface sand grains under Earth conditions. Here, the near-surface means less than 10 meters from the surface.
[0021] According to the law of near-surface sand grain saltation under Earth conditions, set the program input quantity under Earth conditions. The program input quantity includes the sand supply particle size distribution and the axial wind speed, and calculate the sand grain speed, particle size distribution and sand transport rate in the specified area as the program output quantity under Earth conditions.
[0022] Step (2): Use the same sand supply particle size distribution and axial wind speed as the program input quantity under Earth conditions as the wind tunnel input quantity of the wind tunnel test. During the wind tunnel test, use a real-time monitoring device to measure the wind tunnel output quantity corresponding to the same area as the specified area in step 1. The wind tunnel output quantity includes: sand grain speed, particle size distribution and sand transport rate.
[0023] Step (3) corrects the sand movement simulation calculation program through the wind tunnel output of the wind tunnel test to obtain a program that matches the wind tunnel.
[0024] Step (4) sets the test environment of the program that matches the wind tunnel to Martian conditions, that is, sets the atmospheric density and gravity in the environmental parameters of the program to be consistent with Martian conditions.
[0025] According to the sand grain movement under Martian conditions, set the program input under Martian conditions, including the sand supply particle size distribution and the axial wind speed, and calculate the sand grain speed, particle size distribution, and sand transport rate in the specified area as the program output under Martian conditions.
[0026] Step (5) conducts a wind tunnel test, adjusts the input parameters of the wind tunnel test, including the axial wind speed and the particle size distribution, and measures the corresponding wind tunnel output in the specified area in real time to obtain the range of input parameters of the wind tunnel test that makes the wind tunnel output consistent with the program output under Martian conditions in step (4), including the axial wind speed range and the particle size distribution range.
[0027] Adjust the input parameters of the wind tunnel test within the axial wind speed range and the particle size distribution range to achieve the same sand grain speed, particle size distribution, and sand transport rate as under Martian conditions when the wind tunnel outputs under ground conditions.
[0028] Step (6) sets a reasonable sand blowing time according to the axial wind speed range and the particle size distribution range, and conducts a continuous sand blowing experiment on the sample material in the wind tunnel.
[0029] Step (7) takes some samples of the sample material after the test under different parameters for various test analyses, including analyzing the morphology of the sample surface after being impacted by sand grains using a scanning electron microscope and an atomic force microscope, testing the optical properties of the sample after the test using a UV-visible spectrophotometer and a Fourier transform infrared spectrometer, testing the surface conductivity of the sample using a high resistance meter, and analyzing the performance changes of the material in the simulated Martian sand and dust environment.
[0030] In summary, the above is only a preferred embodiment of the present invention and is not used to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. A test method for simulating the influence of the sand and wind environment on the surface of Mars on the material properties, characterized in that, It includes the following steps: Step (1): Using a sand-drift movement simulation calculation program, set the experimental environment to Earth conditions, that is, set the atmospheric density and gravity in the program's environmental parameters to be consistent with Earth conditions; using the sand-drift movement simulation calculation program, simulate the near-surface sand grain saltation under Earth conditions, and according to the near-surface sand grain saltation law under Earth conditions, set the program input under Earth conditions. The program input includes the sand supply particle size distribution and the axial wind speed, and calculate the sand grain velocity, particle size distribution, and sediment transport rate in a specified area as the program output under Earth conditions; Step (2): Use the same sand supply particle size distribution and axial wind speed as the program input under Earth conditions as the wind tunnel input for the wind tunnel test. During the wind tunnel test, use a real-time monitoring device to measure the wind tunnel output corresponding to the same area as the specified area in Step 1. The wind tunnel output includes: sand grain velocity, particle size distribution, and sediment transport rate; Step (3): Modify the sand-drift movement simulation calculation program through the wind tunnel output of the wind tunnel test to obtain a program matching the wind tunnel; Step (4): Set the experimental environment of the program matching the wind tunnel to Mars conditions, that is, set the atmospheric density and gravity in the program's environmental parameters to be consistent with Mars conditions; According to the sand grain movement under Mars conditions, set the program input, including the sand supply particle size distribution and the axial wind speed, and calculate the sand grain velocity, particle size distribution, and sediment transport rate in a specified area as the program output under Mars conditions; Step (5): Conduct a wind tunnel test, adjust the input parameters of the wind tunnel test, including the axial wind speed and the particle size distribution, and measure the wind tunnel output corresponding to the specified area in real time to obtain the range of input parameters of the wind tunnel test that makes the wind tunnel output consistent with the program output under Mars conditions in Step (4), including the range of axial wind speed and the range of particle size distribution; Adjust the input parameters of the wind tunnel test within the range of the axial wind speed and the particle size distribution to achieve the same sand grain velocity, particle size distribution, and sediment transport rate as those under Mars conditions in the wind tunnel under ground conditions; Step (6): According to the range of the axial wind speed and the particle size distribution, set a reasonable sand-blowing time and conduct a continuous sand-blowing experiment on the sample material in the wind tunnel.
2. The test method for simulating the influence of the sand and wind environment on the surface of Mars on the material properties according to claim 1, characterized in that, After Step (6) of the method, it further includes the following steps: Step (7): Take some samples of the sample material after the test under different parameters for various test analyses, including using a scanning electron microscope and an atomic force microscope to analyze the morphology of the sample surface after being impacted by sand grains, using a UV-visible spectrophotometer and a Fourier transform infrared spectrometer to test the optical properties of the sample after the test, and using a high resistance meter to test the surface conductivity of the sample, and analyze the performance changes of the material in the simulated Mars sandstorm environment.