Fabric buffering landing platform with high bearing capacity, impact resistance and light weight as well as preparation method and application of fabric buffering landing platform

Abstract

The invention discloses a fabric buffering landing platform with high bearing capacity, impact resistance and light weight and a preparation method and application of the fabric buffering landing platform. According to the platform, the light weight of the buffering air bag platform base can be achieved, and compared with a traditional steel plate platform, the energy conversion efficiency of compressed air of the air bag is remarkably improved. Due to the excellent impact resistance and energy dissipation capacity, the platform shows more excellent application prospects in the aspect of carrier landing protection, is particularly suitable for scenes needing efficient buffering and light weight requirements, and has wide engineering application potential.

Description

Technical Field

[0001] The present invention relates to the application field of composite materials and cushioned soft landing, and specifically to a fabric cushioned landing platform with high load-bearing capacity, impact resistance, and light weight, as well as its preparation method and application. The fabric cushioned landing platform is a new type of fabric-based cushioned landing platform made of shear-hardening and impact-resistant intelligent material with high load-bearing capacity. Background Art

[0002] The core principle of airbag cushioning is to absorb 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 rigidity is too high, it is easy to cause rebound during landing; if the rigidity is too low, it may cause the airbag to collapse or overturn. Therefore, to address this problem, the present invention proposes an intelligent material composite fabric platform with high load-bearing capacity and excellent impact resistance. This platform is designed to replace traditional metal platforms, improve the stability and cushioning efficiency of the airbag during landing, and thus optimize the performance of the overall landing cushioning system.

[0003] The invention with patent publication number CN202211443718.9 discloses a cushioning airbag device for preventing overturning during airdrop landing. The device includes an airbag body installed at the bottom of an airdrop cargo platform or airdrop equipment, an inner bag is provided on the inner top surface of the airbag body, an inflation mechanism is provided on the upper outer side, and an exhaust valve is provided on the lower outer side. This invention can maintain a certain distance of sliding when landing in the face of a large horizontal speed, thereby effectively eliminating the rollover problem caused by the "sudden braking" phenomenon of landing. At the same time, the patent with publication number CN202311525975.1 discloses an airdrop landing cushioning device and its airdrop method. The device is provided with an energy-absorbing circular tube and a self-balancing adjustment mechanism so that the upper tray can remain horizontal when the airdrop lands, thereby ensuring that the energy-absorbing circular tube can give full play to its energy absorption and cushioning functions, and ensuring that the cushioning device can effectively protect the safety of airdropped items.

[0004] The cushioning airbag is a commonly used landing cushioning structure, which mainly consumes the impact kinetic energy of the cushioned object by compressing the work done by the gas inside the airbag. It has the advantages of light weight and excellent cushioning performance, and is widely used in the fields of spacecraft recovery, drone recovery, and airborne airdrop. The invention with patent publication number CN202211528401.5 discloses a combined cushioning airbag active exhaust control system. The system can be used for landing cushioning protection of various loads, and is suitable for non-destructive landing of large-mass aircraft and spacecraft. By actively controlling the exhaust process, the stability and safety of the cushioning system are further improved.

[0005] In recent years, researchers at home and abroad have conducted extensive and in-depth research on cushioning and energy absorption characteristics through a variety of 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 accuracy, slow response speed, poor adaptability, and heavy reliance on assembly personnel experience in traditional recovery control systems. It proposes improving control accuracy, response speed, and reliability during the spacecraft's landing and recovery process by precisely setting parachute deployment, inflation, and exhaust strategies. The system boasts a stable structure and high implementation reliability.

[0006] According to currently available patent literature, research on landing cushioning platforms that simultaneously meet the requirements of lightweighting and high energy dissipation is relatively limited. In particular, the technology for novel landing cushioning platforms that utilize fabric cushioning platforms and smart materials to achieve both cushioning and energy absorption is particularly lacking. Therefore, to address this technological gap, the present invention has designed a fabric cushioning landing platform that combines high load-bearing capacity, impact resistance, and lightweight characteristics. This platform not only reduces weight while providing effective impact protection, but also significantly improves cushioning efficiency during landing, offering broad application prospects. Summary of the Invention

[0007] To overcome the shortcomings of existing technologies, the present invention provides a lightweight, impact-resistant, and high-load-carrying fabric landing platform and its manufacturing method. The fabric landing platform is a three-dimensional spaced fabric landing platform designed based on a composite shear-deformable rubber (SSG). Incorporating the properties of composite shear-hardening rubber (SSG), this platform offers high load-carrying capacity and impact resistance, effectively absorbing and dissipating impact energy, and protecting vehicles during landing.

[0008] Specifically, the present invention is achieved through the following technical solutions: A lightweight, impact-resistant, and high-load-bearing fabric landing platform is constructed from a composite material of shear-hardening rubber and three-dimensional spacer fabric. This platform, with a 3D spacer fabric matrix and shear-hardening rubber composite material, effectively resists impact during landing. The 3D structure significantly improves the energy conversion efficiency of airbag deflating and compression during landing. The 3D spacer fabric serves as the main component, with the shear-hardening rubber filling the internal spaces within.

[0009] Specifically, a fabric cushioning landing platform with high load-bearing capacity, impact resistance and light weight is provided. The composite fabric platform is a three-dimensional load-bearing structure, including 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.

[0010] Furthermore, the shear hardening adhesive is cross-linked by silicone oil and boric acid in a mass ratio of 10 to 30:1 (for example, 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 degrees Celsius to 200 degrees Celsius.

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

[0012] The present invention also provides a method for preparing the fabric cushioning landing platform as described above, comprising the following steps: Step 1: Preparation of shear-hardening adhesive Silicone oil and boric acid are mixed evenly in a mass ratio of 10 to 30:1, placed in an oven, and heat treated at 160 to 200 degrees Celsius until the reaction system solidifies; after cooling, a shear-hardening adhesive is obtained; Step 2: Preparation of a mixed solution of shear-hardening glue and anhydrous ethanol Weigh shear-hardening glue and anhydrous ethanol separately, and prepare three shear-hardening glue solutions of different concentrations according to the mass ratio of shear-hardening glue to anhydrous ethanol of 1-1.5:1, 2-2.5:1, and 4-4.5:1; Step 3: Filling the three-dimensional spacer fabric with shear-hardening glue The three-dimensional spacer fabric was sequentially immersed in three shear-hardening adhesive solutions of different concentrations. After each immersion, the fabric was placed in an oven and dried at 80 to 200 degrees Celsius for 10 to 60 minutes to complete the adhesion of the shear-hardening adhesive to the fiber surface, thereby obtaining a three-dimensional spacer fabric composite material. Step 4: Preparation of three-dimensional spacer fabric substrate and three-dimensional spacer fabric composite material substrate cutting the three-dimensional spacer fabric composite material into a predetermined shape as a three-dimensional spacer fabric composite material substrate; Step 5: Preparation of Arrayed Cushion Airbags The foam sponge array is bonded to the upper surface of the three-dimensional spacer fabric composite material substrate obtained in step 4, wherein the foam sponge serves as a cushioning airbag to obtain a fabric cushioning landing platform with high load-bearing capacity, impact resistance, and light weight.

[0013] Furthermore: in step 2, the polyborosiloxane and anhydrous ethanol are respectively prepared into solutions of different concentrations at a mass ratio of 1:1, 2:1, and 4:1.

[0014] Furthermore, in step 3, by alternately impregnating the 3D spacer fabric with solutions of varying mass fractions (for example, the 3D spacer fabric is dipped into solutions of shear-hardening adhesive in increasing order of concentration) and then drying, an effective filling structure of the composite material is formed within the 3D spacer fabric, thereby increasing the shear-hardening adhesive content within the 3D spacer fabric. Specifically, the number of immersions is set to six, with the immersion sequence being sequentially using shear-hardening adhesive solutions of varying concentrations (for example, a 1:1 concentration solution for the first immersion, a 2:1 concentration solution for the second immersion, a 4:1 concentration solution for the third immersion, and so on). Each immersion is followed by drying at 90°C to ensure uniform distribution of the composite material within the fabric and achieve optimal adhesion.

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

[0016] Specifically, this article also provides a method for preparing a shear-hardening adhesive composite three-dimensional spacer fabric platform, which specifically includes the following steps: Step 1: Preparation of shear-hardening adhesive Silicone oil and boric acid were mixed in a mass ratio of 15:1 and placed in an oven for heat treatment at 180 degrees Celsius until the reaction system solidified. Subsequently, 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 glue and anhydrous ethanol Weigh shear-hardening adhesive and anhydrous ethanol separately and prepare polyborosiloxane solutions of varying concentrations at mass ratios of 1:1, 2:1, and 4:1. Place the solutions in beakers, seal with plastic wrap, and place in an ultrasonic cleaner at 50°C for 2 hours to ensure thorough mixing. This results in mixed solutions of shear-hardening adhesive and anhydrous ethanol of varying concentrations. Step 3: Preparation of composite three-dimensional spacer fabric filled with smart materials The three-dimensional spacer fabric is sequentially soaked in a 1:1 concentration solution of shear hardening glue and ethanol. After being fully soaked, it is placed in an oven and dried at 90 degrees Celsius for 20 minutes to complete the initial attachment of the shear hardening glue to the surface of the fiber. Subsequently, the fabric is immersed in a 2:1 concentration solution and the same soaking and drying process is repeated. Finally, the fabric is immersed in a 4:1 concentration solution, soaked and dried at 120 degrees Celsius for 30 minutes. After drying, the sample is left to stand at room temperature for 24 hours. After it is completely cooled and the ethanol evaporates, the sample preparation is completed.

[0017] The application of the fabric cushioning landing platform prepared by any of the preparation methods described above, wherein the fabric cushioning landing platform is used as the base of an airdrop package.

[0018] Compared with the prior art, the beneficial effects of the present invention are embodied in: (1) The core of airdrop landing is to achieve the transformation from hard landing to soft landing, and the existing three-dimensional spacer fabrics have 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 lightweight considerations, replacing the metal platform with a fabric platform becomes a reasonable choice.

[0020] (3) The airborne landing system based on the fabric platform can significantly improve the cushioning performance. Compared with the metal platform, fiber composite materials have better energy absorption capacity. The airbag absorbs kinetic energy by compressing the internal gas. The exhaust efficiency of the traditional metal platform is low, while the three-dimensional structure of the fabric platform greatly increases the exhaust area, thereby improving the instantaneous cushioning efficiency of the airbag. 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 the bulky metal platform, the fabric platform can be quickly rolled into a cylindrical shape after landing and tied to the top of the vehicle, showing higher subsequent combat application value.

[0022] (5) The risk of an airbag rupturing during a landing depends primarily on the internal pressure, and composite fabrics can effectively reduce the instantaneous pressure on the airbag when it touches the ground. Therefore, compared with metal platforms, composite fabric platforms can reduce the impact force on the airbag during landing.

[0023] (6) The composite fabric platform can prolong the landing time and reduce the probability of rebound after the vehicle touches the ground, thereby avoiding the occurrence of rollover accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Statistical diagram of the cushioning time and peak force of the drop hammer impact test of the fiber composite material containing 75% SSG mass fraction at different impact energies (1.04 J, 2.08 J, 3.12 J, 4.16 J).

[0025] Figure 2 These are the acceleration-time curves of the center points of the airdrop package-composite fabric and the airdrop package-spacer fabric.

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

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

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

[0029] Figure 6 These are the SSG storage modulus and loss modulus curves.

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

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

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

[0033] Figure 10 Schematic diagram of the composite fabric buffer platform and its mechanism diagram. DETAILED DESCRIPTION

[0034] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of the specific embodiments of the present invention is provided in conjunction with the following embodiments. The following is merely an example and illustration of the concept of the present invention. Any modification, supplement, or substitution of the described specific embodiments by a person skilled in the art, as long as it does not deviate from the concept of the invention or exceed the scope defined by the claims, shall fall within the scope of protection 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 polyborosiloxane is as follows: Polyborosiloxane was molded into thin film samples with a thickness of 1 mm and a diameter of 20 mm. The shear hardening properties of the films were then characterized using a commercial rheometer (Physica MCR 302, Anton Paar, Austria) to evaluate their 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-speed impact is as follows: The samples were placed on a force transducer (KD3005C, Yangzhou Kedong) and subjected to impact testing using a drop hammer (ZCJ1302-A, Meters Industrial). A 0.55 kg hammer was released from various heights. The signals generated during the impact were amplified by a charge amplifier (YE5853, Donghua Testing), and the data were acquired and recorded using a digital oscilloscope (Tektronix DPO 2014B).

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

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

[0039] Step 2: Preparation of shear-hardening adhesive solution Polyboric acid siloxane and anhydrous ethanol in mass ratios of 1:1, 2:1, and 4:1 were weighed respectively, mixed and placed in a beaker, the mouth of the beaker was sealed with plastic wrap, and the beaker was placed in an ultrasonic cleaner, the temperature was set to 50 degrees Celsius, and ultrasonic treatment was performed for 2 hours to obtain shear-hardening adhesive solutions of different concentrations, which were named 1:1 mass ratio shear-hardening adhesive solution, 2:1 mass ratio shear-hardening adhesive solution, and 4:1 mass ratio shear-hardening adhesive solution, respectively.

[0040] Step 3: Preparation of three-dimensional spacer fabric composite materials The three-dimensional spacer fabric (Jiangsu Simu New Textile Technology Co., Ltd.) was immersed in a shear-hardening adhesive solution with a mass ratio of 1:1, taken out and placed in an oven, and dried at 90 degrees Celsius for 20 minutes to complete the initial attachment. Next, the fabric was immersed in a shear-hardening adhesive solution with a mass ratio of 2:1, and the same drying steps were repeated. Finally, the fabric was immersed in a shear-hardening adhesive solution with a mass ratio of 4:1, placed in an oven and dried at 120 degrees Celsius for 30 minutes. After the sample was dried, it was allowed to cool for 24 hours to ensure that the shear-hardening adhesive was fully absorbed into the interior of the three-dimensional spacer fabric. The sample preparation was completed, and a three-dimensional spacer fabric composite material was obtained. The mass fraction of the shear-hardening adhesive 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 In this embodiment, a three-dimensional spacer fabric composite material substrate and an airdrop package of the three-dimensional spacer fabric substrate are prepared by the following steps: Step 1: Preparation of a 3D spacer fabric substrate and a 3D 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 three-dimensional spacer fabric base, and then 3M double-sided tape (3 cm wide) was used to tightly adhere to the front 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 three-dimensional spacer fabric composite material base, and then 3M double-sided tape (3 cm wide) was used to tightly adhere to the front of the three-dimensional spacer fabric composite material.

[0042] Step 2: Preparation of Array-Type Cushion Airbags A foam stick sponge strip with a diameter of 25 mm was selected and cut into 25 cylindrical foams with a height of 20 mm. Subsequently, the foam stick sponge strip was neatly bonded to the upper surface of the three-dimensional spacer fabric substrate prepared in step 1 of Example 2 (i.e., bonded by the 3M double-sided tape in step 1) in a 5 by 5 square array (i.e., bonded by the 3M double-sided tape in step 1). The same method was used to bond the foam sponge array to the upper surface of the three-dimensional spacer fabric composite material substrate (i.e., bonded by the 3M double-sided tape in step 1).

[0043] Step 3: Preparation of a three-dimensional spacer fabric composite material substrate and an entire airdrop package of the three-dimensional spacer fabric substrate A transparent acrylic box with a bottom dimension of 25 cm x 25 cm and a height of 5 cm was prepared. 3M double-sided tape was applied to the bottom of the box, which was then bonded to the array of cushioning airbags prepared in Step 2 of Example 2. This completed the preparation of an airdrop package experimental device with a 3D spacer fabric composite material base (referred to as the composite sample). Using the same method as above, an airdrop package experimental device with a 3D spacer fabric base (referred to as the pure sample) was obtained.

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

[0045] Figure 2 The three-dimensional spacer fabric composite material substrate and the three-dimensional spacer fabric substrate airdrop package in Example 2 were released from 500 mm above the ground along four guide rails perpendicular to the ground, and the acceleration time curve during the landing process was recorded. Figure 2 The accelerometer in the device is bonded to the center of the airdrop package, or acrylic box, and records the acceleration-time curve at the center of the airdrop package during landing. The peak acceleration at the center of the airdrop package with a 3D spacer fabric base is 950 meters per second squared, while that of the 3D spacer fabric composite base is 620 meters per second squared, clearly demonstrating the superior landing cushioning provided by the composite fabric platform. Furthermore, the cushioning time for the center acceleration of the 3D spacer fabric base airdrop package is 0.08 seconds, while that of the 3D spacer fabric composite base airdrop package is 0.16 seconds. This indicates that the 3D spacer fabric composite cushioning platform has twice the cushioning time from landing to recovery than the 3D spacer fabric cushioning platform, demonstrating that the composite material significantly outperforms the pure fabric platform in cushioning.

[0046] Figure 3 In a, the airdrop package with a three-dimensional spacer fabric composite material substrate in Example 2 is released from 500 mm above the ground along four guide rails perpendicular to the ground, and the acceleration-time curve during its landing is recorded. Figure 3In b, the airdrop package with a three-dimensional spacer fabric base in Example 2 is released from 500 mm above the ground along four guide rails perpendicular to the ground, and the acceleration-time curve during its landing is recorded. Figure 3 Middle a and Figure 3 The number of acceleration sensors in b is 4, and they are glued to the four top corners of the acrylic box. That is, the acceleration time curve of the airdrop package landing at the vertex is recorded. If the acceleration peak values ​​at the four vertices are not much different and are close to the center point ( Figure 2 ) are similar in magnitude, the data is credible. Figure 3 a and Figure 3 As can be seen from Figure b, the introduction of shear hardening rubber enables the fabric to perform better in the landing cushioning process.

[0047] Observing the acceleration signals at the four corners of the 3D spacer fabric-based airdrop package and the 3D spacer fabric composite material base reveals that the accelerations at all four corners begin to change at the same moment and reach their peak values, indicating that the airdrop platform landed smoothly and reached its maximum compression value at the same moment. Furthermore, the accelerations at all four corners return to zero at the same moment, indicating that the four corners of the airdrop package rebounded at the same time and at similar velocities. This indicates that the introduction of the 3D spacer fabric platform and the 3D spacer fabric composite material base effectively suppresses the rebound and rollover phenomenon after the airdrop package's landing impact, meaning that the accelerations at the four corners do not change synchronously. Figure 4 The airdrop packages of the spacer fabric composite material platform (a) and the three-dimensional spacer fabric platform (b) are equipped 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 are released from 500 mm above the ground along four guide rails perpendicular to the ground to simulate the landing situation. It can be seen that the buffering time of the spacer fabric composite material platform is longer, and the rebound time is significantly later than that of the spacer fabric platform.

[0048] Figure 5 The airdrop package of the spacer fabric composite material platform (b) and the airdrop package of the three-dimensional spacer fabric platform (a) are respectively equipped 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 are released from 500 mm above the ground along four guide rails perpendicular to the ground to simulate the landing situation. It can be seen that no small balls in the spacer fabric composite material platform are broken, while there are five broken small balls in the spacer fabric platform, which can be seen to have a better protection effect.

[0049] Figure 6The storage modulus and loss modulus curves of SSG show that the storage modulus increases with the increase of shear frequency, and can reach a maximum of 300,000 Pa, so it has a shear hardening effect.

[0050] Figure 7 This is the loss factor (i.e., loss modulus divided by storage modulus) curve of SSG. It can be seen from the figure that the loss factor decreases with increasing shear frequency, so it has a shear hardening effect.

[0051] Figure 8 、 Figure 9 These are cross-sectional views of the composite material and pure fiber sample, respectively. It can be seen that the shear-hardened glue is attached to the upper and lower surfaces of the fiber and the surface of the fiber spacer wires.

[0052] Figure 10 A schematic diagram of a fabric-based airdrop device is shown. The fabric platform base is primarily divided into a three-dimensional spaced fabric platform and a three-dimensional spaced fabric composite platform. A diagram explaining the landing mechanism of the fabric platform and the cushioning airbag during the landing of the airdrop package is then provided for each of these two platforms. It can be seen that the airdrop package with a three-dimensional spaced fabric composite base compresses less than the one with a three-dimensional spaced fabric base. This is due to the presence of shear-hardening rubber, which dissipates energy during impact compression. Furthermore, its filling reduces the compression of the fabric platform, thereby reducing the risk of rebound and rollover.

[0053] Finally, it should be noted that the above embodiments are merely examples for the purpose of illustrating the present invention and are not intended to limit the embodiments. Those skilled in the art will readily appreciate that other variations or modifications based on the above description are possible. It is not necessary and impossible to provide an exhaustive list of all embodiments. However, obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A fabric cushioning landing platform with high load-bearing capacity, impact resistance and light weight, characterized in that: The composite fabric platform is a three-dimensional load-bearing structure, including 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.

2. The fabric cushioning landing platform according to claim 1, characterized in that: The three-dimensional spacer fabric has a three-dimensional structure, and comprises two layers of polyester fibers, an upper layer and a lower layer, and a spacer yarn in the middle layer.

3. The fabric cushioning landing platform according to claim 1, characterized in that: The shear hardening adhesive is formed by cross-linking silicone oil and boric acid at a mass ratio of 10 to 30:1 at a temperature of 160 to 200 degrees Celsius.

4. The fabric cushioning landing platform according to claim 1, characterized in that: The mass ratio of the shear hardening rubber to the three-dimensional spacer fabric in the composite fabric is 3-5:

1.

5. A method for preparing a fabric cushioning landing platform according to any one of claims 1 to 4, characterized in that: The steps include: Step 1: Preparation of shear hardening glue The silicone oil and boric acid are uniformly mixed in a mass ratio of 10 to 30:1, placed in an oven, and heat treated at 160 to 200 degrees Celsius until the reaction system is solidified; after cooling, a shear hardening adhesive is obtained; Step 2: Preparation of a mixed solution of shear-hardening glue and anhydrous ethanol Weigh the shear hardening glue and anhydrous ethanol respectively, and prepare three shear hardening glue solutions of different concentrations according to the mass ratio of shear hardening glue to anhydrous ethanol of 1-1.5:1, 2-2.5:1, and 4-4.5:1; Step 3: Filling the three-dimensional spacer fabric with shear-hardening glue The three-dimensional spacer fabric is sequentially immersed in three shear hardening glue solutions of different concentrations, and after each immersion, it is placed in an oven and dried at 80 degrees Celsius to 200 degrees Celsius for 10 to 60 minutes to complete the attachment of the shear hardening glue to the fiber surface, thereby obtaining a three-dimensional spacer fabric composite material; Step 4: Preparation of three-dimensional spacer fabric substrate and three-dimensional spacer fabric composite material substrate Cutting the three-dimensional spacer fabric composite material into a predetermined shape as a three-dimensional spacer fabric composite material substrate; Step 5: Preparation of array cushioning airbags The foam sponge array is bonded to the upper surface of the three-dimensional spacer fabric composite material substrate obtained in step 4, wherein the foam sponge serves as a cushioning airbag, to obtain a fabric cushioning landing platform with high load-bearing capacity, impact resistance and light weight.

6. Application of the fabric cushioning landing platform obtained by the preparation method according to claim 5, characterized in that: The fabric cushioned landing platform is used as the base of the airdrop package.

7. The use according to claim 6, characterized in that: The method comprises the following steps: the airdrop package comprises a block, and the block is fixed above the array-type cushioning airbags obtained in step 5 to obtain an airdrop package experimental device with a three-dimensional spacer fabric base.

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