A fabric cushion landing platform with high bearing capacity, impact resistance, light weight and a preparation method and application thereof

Abstract

The application discloses a fabric cushion landing platform with high bearing capacity, impact resistance and light weight as well as a preparation method and application thereof. The platform not only can realize the light weight of a cushion airbag platform base, but also significantly improves the energy conversion efficiency of airbag compressed gas compared with a traditional steel plate platform. Due to the excellent impact resistance and energy dissipation capacity, the platform exhibits more excellent application prospect in vehicle landing protection, and is especially suitable for scenes with high efficient buffering and light weight requirements, and has wide engineering application potential.

Description

Technical Field

[0001] This invention relates to composite materials and the application of cushioned soft landing, specifically to a fabric-based cushioned landing platform with high load-bearing capacity, impact resistance, and lightweight, as well as its preparation method and application. The fabric-based cushioned landing platform is a shear-hardening, impact-resistant smart material, and is a novel fabric-based cushioned landing platform with high load-bearing capacity. Background Technology

[0002] The core principle of airbag cushioning lies in absorbing energy through the deformation of the airbag under compressive load. Therefore, the deformation characteristics of the airbag play a crucial role in its cushioning effect. If the airbag is too rigid, it is prone to rebound upon landing; if the rigidity is too low, it may cause the airbag to collapse or overturn. Therefore, based on this problem, this invention proposes a smart material composite fabric platform with high load-bearing capacity and excellent impact resistance. This platform aims to replace the traditional metal platform, improving the stability and cushioning efficiency of the airbag during landing, thereby optimizing the performance of the overall landing cushioning system.

[0003] Patent publication number CN202211443718.9 discloses a cushioning airbag device for preventing tipping during airdrop landings. This device includes an airbag body installed on the airdrop platform or the bottom of the airdrop equipment. An inner bladder is located on the inner top surface of the airbag body, an inflation mechanism is provided on the upper outer side, and an exhaust valve is located on the lower outer side. This invention can maintain a gliding distance during landing, even when facing high horizontal speeds, effectively eliminating the tipping problem caused by sudden braking during landing. Meanwhile, patent publication number CN202311525975.1 discloses an airdrop landing cushioning device and its airdrop method. This device, by incorporating an energy-absorbing circular tube and a self-balancing adjustment mechanism, ensures that the upper tray remains level when the airdropped item lands, thereby ensuring that the energy-absorbing circular tube can fully exert its energy absorption and cushioning functions, guaranteeing the safety of the airdropped item.

[0004] Airbags are a commonly used landing cushioning structure, primarily dissipating the impact kinetic energy of the cushioned object by compressing the gas inside the airbag. They offer advantages such as light weight and excellent cushioning performance, and are widely used in spacecraft recovery, drone recovery, and airdrop applications. Patent publication number CN202211528401.5 discloses a combined airbag active exhaust control system. This system can be used for landing cushioning protection of various loads, suitable for non-destructive landings of large-mass aircraft and spacecraft. By actively controlling the exhaust process, it further enhances the stability and safety of the cushioning system.

[0005] In recent years, researchers both domestically and internationally have conducted extensive and in-depth studies on the energy absorption characteristics of buffer systems through various methods, including theoretical calculations, experiments, and numerical simulations. Patent publication number CN201911056694.X discloses a complex recovery and landing control system for a return capsule. This system addresses the problems of low control precision, slow response speed, poor adaptability, and high reliance on the experience of assembly personnel in traditional recovery control systems. It proposes to improve the control precision, response speed, and reliability during spacecraft landing and recovery by precisely setting parachute deployment, inflation, and deflation strategies. It boasts advantages such as structural stability and high implementation reliability.

[0006] Based on currently available patent literature, research on landing cushioning platforms that simultaneously meet the requirements of lightweight design and high energy dissipation is relatively limited. This is particularly true for novel landing platforms utilizing fabric cushioning platforms and smart materials to achieve cushioning and energy absorption; related technologies are especially scarce. Therefore, to address this technological gap, this invention designs a fabric cushioning landing platform with high load-bearing capacity, impact resistance, and lightweight characteristics. This platform not only provides effective impact protection while reducing weight but also significantly improves cushioning efficiency during landing, demonstrating broad application prospects. Summary of the Invention

[0007] To overcome the shortcomings of existing technologies, this invention provides a fabric-cushioned landing platform with high load-bearing capacity, impact resistance, and lightweight, as well as its manufacturing method. The fabric-cushioned landing platform is a three-dimensional spaced fabric-cushioned landing platform design based on composite shear-stiffening rubber (SSG). This platform combines the properties of SSG, possessing high load-bearing capacity and impact resistance, effectively absorbing and dissipating impact energy to protect the vehicle during landing.

[0008] Specifically, the present invention is achieved through the following technical solution: A high-load-bearing, impact-resistant, and lightweight fabric-cushioned landing platform is constructed from a composite material of shear-hardening rubber and three-dimensional spacer fabric. The platform uses three-dimensional spacer fabric as the matrix and shear-hardening rubber as the composite material, effectively resisting impact during landing. The three-dimensional structure design significantly improves the energy conversion efficiency of airbag decompression during landing. The three-dimensional spacer fabric serves as the main body, while the shear-hardening rubber acts as the internal filling material for the three-dimensional spacer fabric.

[0009] Specifically, a composite fabric cushioning landing platform with high load-bearing capacity, impact resistance, and lightweight is provided. The composite fabric platform is a three-dimensional load-bearing structure, comprising shear-hardening adhesive and three-dimensional spacer fabric. The three-dimensional spacer fabric serves as the main body, and the shear-hardening adhesive serves as the internal space filler of the three-dimensional spacer fabric.

[0010] Furthermore, the shear hardening adhesive is formed by cross-linking silicone oil and boric acid at a mass ratio of 10 to 30:1 (e.g., 10:1, 12:1, 14:1, 16:1, 18:1, 20:1, 22:1, 24:1, 26:1, 28:1 or 30:1) at a temperature of 160 to 200 degrees Celsius.

[0011] Furthermore, the shear-hardening adhesive is a polyborosiloxane, which is prepared by crosslinking silicone oil and boric acid at a mass ratio of 15:1 at 180 degrees Celsius.

[0012] The present invention also provides a method for preparing a fabric-cushioned landing platform as described in any one of the above claims, comprising the following steps: Step 1: Preparation of shear-hardening adhesive Silicone oil and boric acid are mixed evenly at a mass ratio of 10~30:1, placed in an oven, and heat-treated at 160°C~200°C until the reaction system solidifies; after cooling, shear hardening adhesive is obtained. Step 2: Preparation of a mixed solution of shear-hardening gel and anhydrous ethanol Weigh out shear-hardening gel and anhydrous ethanol separately, and prepare three shear-hardening gel solutions of different concentrations according to the mass ratio of shear-hardening gel to anhydrous ethanol of 1~1.5:1, 2~2.5:1, and 4~4.5:1. Step 3: Shear the hardened adhesive and fill the three-dimensional spacer fabric. The three-dimensional spacer fabric was sequentially immersed in three shear hardening adhesive solutions of different concentrations. After each immersion, it was placed in an oven and dried at 80°C to 200°C for 10 to 60 minutes to complete the adhesion of the shear hardening adhesive to the fiber surface, thus obtaining a three-dimensional spacer fabric composite material. Step 4: Preparation of the three-dimensional spacer fabric substrate and the three-dimensional spacer fabric composite substrate. The three-dimensional spacer fabric composite material is cut into a predetermined shape to serve as the three-dimensional spacer fabric composite material base; Step 5: Preparation of array-type buffer airbags The foam sponge array is bonded to the upper surface of the three-dimensional spacer fabric composite substrate obtained in step 4, wherein the foam sponge acts as a buffer airbag, resulting in a fabric buffer landing platform with high load-bearing capacity, impact resistance, and lightweight.

[0013] Further: In step 2, the above-mentioned polyborosiloxane and anhydrous ethanol are prepared into solutions of different concentrations at mass ratios of 1:1, 2:1, and 4:1.

[0014] Further, in step 3, by alternately impregnating the three-dimensional spacer fabric with solutions of different mass fractions (e.g., immersing the three-dimensional spacer fabric in a shear-hardening adhesive solution in order of increasing concentration) and then drying it, an effective filling structure of the composite material is formed inside the three-dimensional spacer fabric, thereby increasing the shear-hardening adhesive content in the three-dimensional spacer fabric. Specifically, the number of impregnations is set to 6, and the impregnation sequence is to use different concentrations of shear-hardening adhesive solution sequentially. For example, the first time a 1:1 concentration solution is used, the second time a 2:1 concentration solution is used, the third time a 4:1 concentration solution is used, and so on. After each impregnation, it is dried at 90 degrees Celsius to ensure that the composite material is evenly distributed inside the fabric and achieves the best adhesion effect.

[0015] Furthermore, the dried sample needs to be left to stand at room temperature for 24 hours to ensure complete evaporation of the anhydrous ethanol. During this process, the remaining shear-hardening adhesive will fully adhere to the fiber surface, forming a uniform composite material coating, thus completing the sample preparation.

[0016] Specifically, this paper also provides a method for preparing a shear-hardening adhesive composite three-dimensional spacer fabric platform, which includes the following steps: Step 1: Preparation of shear-hardening adhesive Silicone oil and boric acid were mixed evenly at a mass ratio of 15:1, placed in an oven, and heat-treated at 180 degrees Celsius until the reaction system solidified. Then, octanoic acid was added and the reaction continued for 20 minutes to obtain a shear-hardening adhesive. Step 2: Preparation of a mixed solution of shear-hardening gel and anhydrous ethanol Shear-hardening gel and anhydrous ethanol were weighed separately and polyborosiloxane solutions of different concentrations were prepared at mass ratios of 1:1, 2:1, and 4:1. The solutions were placed in beakers, sealed with plastic wrap, and placed in an ultrasonic cleaner. The temperature was set to 50 degrees Celsius and the ultrasonic time was 2 hours to ensure that the solutions were thoroughly mixed, thus obtaining mixed solutions of shear-hardening gel and anhydrous ethanol of different concentrations. Step 3: Preparation of composite three-dimensional spacer fabric filled with smart materials The three-dimensional spacer fabric was sequentially immersed in a 1:1 solution of shear-hardening adhesive and ethanol. After thorough immersion, it was dried in an oven at 90°C for 20 minutes to achieve initial adhesion of the shear-hardening adhesive to the fiber surface. Subsequently, the fabric was immersed in a 2:1 solution, and the same immersion and drying process was repeated. Finally, the fabric was immersed in a 4:1 solution and dried at 120°C for 30 minutes. After drying, the sample was allowed to stand at room temperature for 24 hours to allow it to cool completely and for the ethanol to evaporate, thus completing the sample preparation.

[0017] Application of the fabric-cushioned landing platform prepared by any of the above preparation methods, wherein the fabric-cushioned landing platform is used as the base of the airdrop package.

[0018] Compared with the prior art, the beneficial effects of the present invention are reflected in: (1) The core of airdrop landing is to realize the transformation from hard landing to soft landing, and the existing three-dimensional spacer fabric has excellent frontal impact resistance.

[0019] (2) Current airborne landing platforms are mostly made of metal, but this increases the size of the parachute and reduces its deceleration efficiency, which is not conducive to effective braking. Based on the consideration of weight reduction, replacing the metal platform with a fabric platform is a reasonable choice.

[0020] (3) Airborne landing systems based on fabric platforms can significantly improve cushioning performance. Compared to metal platforms, fiber composite materials have better energy absorption capabilities. Airbags absorb kinetic energy by compressing internal gas. Traditional metal platforms have low exhaust efficiency, while the three-dimensional structure of fabric platforms greatly increases the exhaust area, thereby improving the instantaneous cushioning efficiency of the airbags. In addition, the application range of shear-hardening rubber during landing is expanded, further enhancing the overall cushioning effect and effectively protecting the vehicle.

[0021] (4) In terms of transportation and carrying, the fabric structure is easy to roll up and has good portability. Compared with bulky metal platforms, the fabric platform can be quickly rolled into a cylindrical shape and tied to the top of the vehicle after landing, showing higher value for subsequent combat applications.

[0022] (5) The risk of airbag rupture during the cushioning process depends mainly on the internal pressure, while composite fabric can effectively reduce the instantaneous pressure on the airbag upon landing. Therefore, compared with metal platforms, composite fabric platforms result in less impact force on the airbag during landing.

[0023] (6) Composite fabric platforms can extend landing time and reduce the probability of vehicle rebound after touching the ground, thereby avoiding rollover accidents. Attached Figure Description

[0024] Figure 1 The graph shows the buffer time and peak force of fiber composites containing 75% SSG by mass under different impact energies (1.04 J, 2.08 J, 3.12 J, 4.16 J).

[0025] Figure 2 The acceleration-time curves at the center point of the airdrop package-composite fabric and the airdrop package-interval fabric are shown.

[0026] Figure 3 The acceleration-time curves are for the four corner vertices of the airdrop package-pure sample and the airdrop package-interval fabric.

[0027] Figure 4 Landing process for composite fiber material platform (a) and three-dimensional spacer fabric platform (b).

[0028] Figure 5 The images show the damage to the internal spheres of the composite fiber material platform (b) and the three-dimensional spacer fabric platform (a) after landing.

[0029] Figure 6 The curves show the energy storage modulus and loss modulus of the SSG.

[0030] Figure 7 This is the SSG loss factor curve.

[0031] Figure 8 This is a picture of a composite fiber.

[0032] Figure 9 This is a photograph of a pure fiber sample.

[0033] Figure 10 This is a schematic diagram of a composite material fabric cushioning platform and its mechanism. Detailed Implementation

[0034] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to examples. The following content is merely an example and illustration of the concept of the present invention. Those skilled in the art can make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not depart from the inventive concept or exceed the scope defined by the claims, all of which should fall within the protection scope of the present invention.

[0035] The performance parameters of the samples prepared in the following examples were tested according to the following test methods: A. The specific method for measuring the rheological properties of polyborosiloxanes is as follows: Polyborosiloxane was prepared into thin film samples with a thickness of 1 mm and a diameter of 20 mm using a mold. Subsequently, the shear stiffening properties of the film were characterized using a commercial rheometer (Physica MCR 302, Anton Paar, Austria) to evaluate its rheological behavior and performance at different shear rates.

[0036] B. The specific method for measuring the protective performance of three-dimensional spacer fabrics and their composite samples under low-velocity impact is as follows: The sample was placed on a force sensor (KD3005C, Yangzhou Kedong), and a 0.55 kg hammer was released from different heights using a drop hammer impact tester (ZCJ1302-A, Meters Industrial) to conduct impact tests on the sample. The signal generated during the impact was amplified by a charge amplifier (YE5853, Donghua Testing), and the data was finally acquired and recorded using a digital oscilloscope (Tektronix DPO 2014B).

[0037] C. The specific methods for measuring the landing cushioning performance of three-dimensional spacer fabrics and their composite structures are as follows: Accelerometers (110607R, Yangzhou Kedong) were installed at four breakpoints on the top of the sample, and an impact was released from a height of 500 mm. After the sample was impacted, the signals collected by the sensors were amplified by a charge amplifier (YE5853, Donghua Testing), and finally the data were synchronously acquired and recorded by two digital oscilloscopes (Tektronix DPO 2014B).

[0038] Example 1 This embodiment prepares a three-dimensional spacer fabric composite material through the following steps: Step 1: Preparation of shear-hardening adhesive Dimethyl silicone oil (Jining Huakai Resin Co., Ltd., molecular weight 4000, carbonyl content c) was used. carbonyl ≥2.5%) and boric acid are mixed evenly at a mass ratio of 15:1 and placed in an oven at 180 degrees Celsius for heat treatment until the system is cured to obtain polyborate siloxane (i.e., shear hardening adhesive).

[0039] Step 2: Preparation of shear-hardening adhesive solution Weigh out polyborosiloxane and anhydrous ethanol in mass ratios of 1:1, 2:1, and 4:1 respectively, mix them, place them in beakers, seal the mouth of the beakers with plastic wrap, and place the beakers in an ultrasonic cleaner. Set the temperature to 50 degrees Celsius and ultrasonically treat for 2 hours to obtain shear-hardening gel solutions of different concentrations, which are named 1:1 mass ratio shear-hardening gel solution, 2:1 mass ratio shear-hardening gel solution, and 4:1 mass ratio shear-hardening gel solution, respectively.

[0040] Step 3: Preparation of three-dimensional spacer fabric composite material The three-dimensional spacer fabric (Jiangsu Simu New Textile Technology Co., Ltd.) was immersed in a 1:1 mass ratio shear-hardening adhesive solution, then removed and placed in an oven at 90 degrees Celsius for 20 minutes to complete the initial adhesion. Next, the fabric was immersed in a 2:1 mass ratio shear-hardening adhesive solution, and the same drying steps were repeated. Finally, the fabric was immersed in a 4:1 mass ratio shear-hardening adhesive solution and placed in an oven at 120 degrees Celsius for 30 minutes. After drying, the sample was allowed to cool for 24 hours to ensure that the three-dimensional spacer fabric fully absorbed the shear-hardening adhesive. The sample preparation was then complete, yielding a three-dimensional spacer fabric composite material. The shear-hardening adhesive mass fraction in the three-dimensional spacer fabric composite material was 75% (based on the total mass of the three-dimensional spacer fabric composite material).

[0041] Example 2 This embodiment prepares a three-dimensional spacer fabric composite substrate and an airdrop package based on the three-dimensional spacer fabric substrate through the following steps: Step 1: Preparation of three-dimensional spacer fabric substrate and three-dimensional spacer fabric composite substrate Using large fabric scissors, the entire roll of three-dimensional spacer fabric was cut into 25 cm by 25 cm squares as the base of the three-dimensional spacer fabric, and then 3M double-sided tape (3 cm wide) was used to tightly adhere it to the front side of the fabric. Using the same method, the three-dimensional spacer fabric composite material prepared according to Example 1 was cut into 25 cm by 25 cm squares as the base of the three-dimensional spacer fabric composite material, and then 3M double-sided tape (3 cm wide) was used to tightly adhere it to the front side of the three-dimensional spacer fabric composite material.

[0042] Step 2: Preparation of array-type buffer airbags Select a foam rod / sponge strip with a diameter of 25 mm and cut it into 25 cylindrical foams with a height of 20 mm. Then, neatly attach them in a 5x5 square array (with a horizontal and vertical spacing of 25 mm) to the upper surface of the three-dimensional spacer fabric substrate prepared in step 1 of Example 2 (i.e., by using 3M double-sided tape in step 1). Using the same method, attach the foam sponge array to the upper surface of the three-dimensional spacer fabric composite substrate (i.e., by using 3M double-sided tape in step 1).

[0043] Step 3: Preparation of the three-dimensional spacer fabric composite substrate and the entire airdrop package based on the three-dimensional spacer fabric substrate. Select a transparent acrylic box with a base size of 25 cm x 25 cm and a height of 5 cm. Securely attach 3M double-sided tape to the bottom of the transparent acrylic box, and then firmly adhere it to the array-type buffer airbag prepared in step 2 of Example 2. The airdrop package experimental device with a three-dimensional spacer fabric composite substrate (hereinafter referred to as the composite sample) is thus prepared. Using the same method, an airdrop package experimental device with a three-dimensional spacer fabric substrate (hereinafter referred to as the pure sample) can be obtained.

[0044] Figure 1 Figure 'a' shows the statistical graph of peak force versus impact energy of the three-dimensional spacer fabric (Jiangsu Simu New Textile Technology Co., Ltd.) and the prepared composite material samples under different impact energies (1.04 J, 2.08 J, 3.12 J, 4.16 J) in the drop hammer impact test. It can be concluded that the peak force of the spacer fabric composite material is much smaller than that of the spacer fabric under different impact energies from low to high. Figure 1 Figure b shows the statistical graph of buffer time versus impact energy for the three-dimensional spacer fabric and the prepared composite material samples under different impact energies (1.04 J, 2.08 J, 3.12 J, 4.16 J). It can be concluded that the buffer time of the spacer fabric composite material is much longer than that of the spacer fabric under different impact energies.

[0045] Figure 2 In Example 2, the three-dimensional spacer fabric composite substrate and the airdrop package based on the three-dimensional spacer fabric substrate were released from a height of 500 mm above the ground along four guide rails perpendicular to the ground, and the acceleration-time curves during the landing process were recorded. Figure 2 The accelerometer is attached to the center of the airdrop pack, i.e., the acrylic box, and records the acceleration-time curve at the center point of the airdrop pack during landing. The peak acceleration at the center point of the airdrop pack with the three-dimensional spacer fabric base is 950 m / s², while that with the three-dimensional spacer fabric composite material base is 620 m / s², clearly showing the significant landing cushioning effect of the composite fabric platform. Furthermore, the buffer time for the center acceleration of the airdrop pack with the three-dimensional spacer fabric base is 0.08 seconds, while the buffer time for the center acceleration of the airdrop pack with the three-dimensional spacer fabric composite material base is 0.16 seconds. This indicates that the buffer time from landing to recovery for the three-dimensional spacer fabric composite material platform is twice that of the three-dimensional spacer fabric platform, thus demonstrating that the cushioning effect of the composite material is significantly better than that of the pure fabric platform.

[0046] Figure 3 In Example 2, the airdrop package with a three-dimensional spacer fabric composite substrate is released from 500 mm above the ground along four guide rails perpendicular to the ground, and the acceleration-time curve during its landing process is recorded. Figure 3In Example 2, the airdrop package with a three-dimensional spaced fabric substrate is released from a height of 500 mm above the ground along four guide rails perpendicular to the ground, and its acceleration-time curve during landing is recorded. Figure 3 a and Figure 3 In section b, there are four accelerometers, glued to the four top corners of the acrylic box. This records the acceleration-time curve at the landing point of the airdrop package's apex. If the peak acceleration values ​​at the four apexes are not significantly different and are close to the center point (…), then… Figure 2 If the peak acceleration values ​​at points () are similar in magnitude, the data is reliable. Figure 3 a and Figure 3 As can be seen from b, the introduction of shear-hardening adhesive enabled the fabric to perform better during landing cushioning.

[0047] Observing the acceleration signals at the four corners of the three-dimensional spacer fabric-based airdrop package and the three-dimensional spacer fabric composite material substrate reveals that the acceleration at each corner begins to change at the same moment, reaching its peak value simultaneously. This indicates that the airdrop platform lands smoothly and reaches its compression extreme value at the same instant. Furthermore, the acceleration at each of the four corners returns to zero at the same moment, indicating that the four corners of the airdrop package rebound at the same instant, and that the rebound velocities at each corner are similar. Therefore, it can be concluded that introducing a three-dimensional spacer fabric platform and a three-dimensional spacer fabric composite material substrate can effectively suppress the rebound and rollover phenomenon of the airdrop package after landing impact; that is, the acceleration at the four corners does not change synchronously. Figure 4 To simulate landing, the airdrop packages of the spacer fabric composite platform (a) and the three-dimensional spacer fabric platform (b) were filled with 32 small balls (the small balls are single-hole hollow glass balls with a diameter of 15 mm). The airdrop packages based on the two materials were released from 500 mm above the ground along four guide rails perpendicular to the ground. It can be seen that the buffer time of the spacer fabric composite platform is longer and the rebound time is significantly later than that of the spacer fabric platform.

[0048] Figure 5 The airdrop package (b) of the spacer fabric composite platform and the airdrop package (a) of the three-dimensional spacer fabric platform were each filled with 32 small balls (the small balls are single-hole hollow glass balls with a diameter of 15 mm); and the airdrop packages based on the two materials were released from 500 mm above the ground along four guide rails perpendicular to the ground to simulate landing. It can be seen that no small balls broke in the spacer fabric composite platform, while five small balls broke in the spacer fabric platform, which shows that it has a better protection effect.

[0049] Figure 6The graph shows the energy storage modulus and loss modulus curves of the SSG. It can be seen from the graph that the energy storage modulus increases with the increase of the shear frequency, and can reach a maximum of 300,000 Pa, thus exhibiting a shear hardening effect.

[0050] Figure 7 The curve shows the loss factor (i.e., loss modulus divided by storage modulus) of the SSG. As can be seen from the figure, the loss factor decreases with increasing shear frequency, thus exhibiting a shear hardening effect.

[0051] Figure 8 , Figure 9 The images show cross-sectional views of the composite material and the pure fiber sample, respectively. It can be seen that the shear-hardening adhesive adheres to the upper and lower surfaces of the fiber and the surface of the fiber spacer filaments.

[0052] Figure 10 This diagram illustrates a fabric-based airdrop device, with the fabric platform base primarily divided into a three-dimensional spaced fabric platform and a three-dimensional spaced fabric composite material platform. Diagrams explaining the landing mechanism of the fabric platform and the cushioning airbag during the airdrop package landing process are then provided for each platform. It can be seen that the airdrop package with the three-dimensional spaced fabric composite material base experiences less compression than that with the three-dimensional spaced fabric base. This is because the presence of shear-hardening rubber dissipates energy during impact compression, and its filling reduces the compression of the fabric platform, thus lowering the risk of the airdrop package rebounding and tipping over.

[0053] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A fabric-cushioned landing platform with high load-bearing capacity, impact resistance, and lightweight, characterized in that: The fabric-cushioned landing platform is a three-dimensional load-bearing structure, comprising shear-hardening rubber and three-dimensional spacer fabric; wherein, the three-dimensional spacer fabric serves as the main body, and the shear-hardening rubber serves as the internal space filler of the three-dimensional spacer fabric. The three-dimensional spacer fabric has a three-dimensional structure, including two layers of polyester fibers and a middle layer of spacer fibers. The shear hardening adhesive is formed by cross-linking silicone oil and boric acid at a mass ratio of 10~30:1 at a temperature of 160°C~200°C. The mass ratio of the shear-hardening adhesive to the three-dimensional spacer fabric is 3~5:1; The fabric-cushioned landing platform is manufactured by the following method: Step 1: Preparation of shear-hardening adhesive Silicone oil and boric acid are mixed evenly at a mass ratio of 10~30:1, placed in an oven, and heat-treated at 160°C~200°C until the reaction system solidifies; after cooling, shear hardening adhesive is obtained. Step 2: Preparation of a mixed solution of shear-hardening gel and anhydrous ethanol Weigh out shear-hardening gel and anhydrous ethanol separately, and prepare three shear-hardening gel solutions of different concentrations according to the mass ratio of shear-hardening gel to anhydrous ethanol of 1~1.5:1, 2~2.5:1, and 4~4.5:

1. Step 3: Shear the hardened adhesive and fill the three-dimensional spacer fabric. The three-dimensional spacer fabric was immersed in a shear-hardening adhesive solution in order of increasing shear-hardening adhesive concentration. After each immersion, it was placed in an oven and dried at 80°C to 200°C for 10 to 60 minutes to form an effective filling structure of the composite material inside the three-dimensional spacer fabric, thereby increasing the shear-hardening adhesive content in the three-dimensional spacer fabric and completing the adhesion of the shear-hardening adhesive to the fiber surface, thus obtaining a three-dimensional spacer fabric composite material. Step 4: Preparation of three-dimensional spacer fabric composite substrate The three-dimensional spacer fabric composite material is cut into a predetermined shape to serve as the three-dimensional spacer fabric composite material base; Step 5: Preparation of array-type buffer airbags The foam sponge array is bonded to the upper surface of the three-dimensional spacer fabric composite substrate obtained in step 4, wherein the foam sponge acts as a buffer airbag, resulting in a fabric buffer landing platform with high load-bearing capacity, impact resistance, and lightweight.

2. Use of a fabric cushioned landing platform according to claim 1, characterized in that, The fabric-cushioned landing platform is used as the base for the airdrop package.

3. The application according to claim 2, characterized in that, The process includes the following steps: the airdrop package includes a block, which is fixed above the array-type buffer airbag obtained in step 5 to obtain an airdrop package experimental device with a three-dimensional spaced fabric composite material substrate.

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