CN111824458B

CN111824458B - Satellite structure supporting system adopting porous phononic crystal shock absorption

Info

Publication number: CN111824458B
Application number: CN202010565049.7A
Authority: CN
Inventors: 王凯; 曹璐; 李献斌; 覃江毅; 范广腾; 张飞; 冉德超; 王建
Original assignee: National Defense Technology Innovation Institute PLA Academy of Military Science
Current assignee: National Defense Technology Innovation Institute PLA Academy of Military Science
Priority date: 2020-06-19
Filing date: 2020-06-19
Publication date: 2021-09-07
Anticipated expiration: 2040-06-19
Also published as: CN111824458A

Abstract

The invention discloses a satellite structure supporting system adopting porous phononic crystal shock absorption, which comprises at least one supporting mechanism; each support mechanism comprises a cross beam and two support columns respectively positioned at two ends of the cross beam, and the support columns are made of porous phononic crystal materials. The satellite structure supporting system adopting the porous phononic crystal shock absorption adopts the satellite structure supporting system adopting the porous phononic crystal shock absorption, and the support columns made of the porous phononic crystal material are used for filtering and reducing vibration waves, so that the effects of noise elimination and shock absorption are achieved, and the internal parts of the satellite are well protected.

Description

Satellite structure supporting system adopting porous phononic crystal shock absorption

Technical Field

The invention relates to the technical field of satellite design, in particular to a satellite structure supporting system adopting porous phononic crystal shock absorption.

Background

With the rapid development of the aerospace industry, the types and functions of satellites are increasingly abundant. Due to the particularity of space transportation, the satellite is easily damaged by the vibration of rockets and other spacecrafts in the launching process, and potential threats are caused to the loads of parts in the satellite and even core parts. With the rapid development of unmanned systems, modules integrated inside satellites will be greatly increased with the increase of satellite functions in the future. How to introduce more advanced materials and structures through structural design and protect devices in the satellite and even the whole satellite structure is a hot problem of technical attack. At the same time, as the satellite becomes multifunctional, the increased mass of the satellite also places greater pressure on the cost of launching the satellite. It is also becoming more important to select lighter weight materials that allow for both structural support and protection of the internal components of the satellite. At present, most of the internal structure structures of the satellites are common supporting structures meeting functional requirements, a central force bearing cylinder type structure or a truss type structure is adopted, and introduction and design of novel materials and structures still need to be researched.

Disclosure of Invention

In order to solve the technical problems in the prior art, the invention provides a satellite structure supporting system adopting porous phononic crystal shock absorption. The specific technical scheme is as follows:

a satellite structure supporting system adopting porous phononic crystal shock absorption comprises at least one supporting mechanism; each support mechanism comprises a cross beam and two support columns respectively positioned at two ends of the cross beam, and the support columns are made of porous phononic crystal materials.

In a possible design, the support column is a cuboid structure with a rectangular cross section, a plurality of holes are uniformly distributed on the support column at intervals, and the axial directions of the holes are parallel to the axial direction of the support column.

In one possible design, the support pillars have a porosity of 0.5 to 0.7.

In one possible design, the number of rows and columns of holes is above 8.

In one possible design, the support column and the cross beam are detachably connected.

The technical scheme of the invention has the following main advantages:

according to the satellite structure supporting system adopting the porous phononic crystal for shock absorption, disclosed by the invention, the vibration waves are filtered and reduced through the supporting columns made of the porous phononic crystal material, so that the effects of noise elimination and shock absorption are achieved, and the internal parts of a satellite are well protected.

Drawings

The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic structural diagram of a support mechanism in a satellite support system using porous photonic crystal shock absorption according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a support column in a satellite support system using porous photonic crystal shock absorption according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a single hole in a support pillar according to an embodiment of the present invention;

FIG. 4 is a diagram of a finite element simulation band for a porous phononic crystal material having a porosity of 0.63 according to an embodiment of the present invention.

Description of reference numerals:

1-supporting mechanism, 11-beam and 12-supporting column.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

The technical scheme provided by the embodiment of the invention is described in detail below with reference to the accompanying drawings.

The embodiment of the invention provides a satellite structure supporting system adopting porous phononic crystal shock absorption, which comprises at least one supporting mechanism 1; as shown in fig. 1, each support mechanism 1 includes a beam 11 and two support columns 12 respectively located at two ends of the beam 11, and the support columns 12 are made of porous phononic crystal material.

The working principle of the satellite structure supporting system adopting porous phononic crystal shock absorption provided by the embodiment of the invention is explained as follows:

when the support mechanism is used, one or more support mechanisms 1 can be selected for supporting according to the structure, the size and the arrangement mode of the component to be supported, and the support mechanisms 1 are arranged between the component to be supported and the satellite shell. When the vibration of the satellite shell is transmitted, the vibration is filtered by the porous phonon crystal material, so that the effect of noise elimination and shock absorption is achieved, and further the internal parts of the satellite are protected.

Therefore, the satellite structure supporting system adopting the porous phononic crystal shock absorption provided by the embodiment of the invention has the advantages that the support columns 12 made of the porous phononic crystal material are used for filtering and reducing vibration waves, the noise elimination and shock absorption effects are realized, and the internal parts of the satellite are well protected.

The sizes of the cross beam 11 and the support column 12 in the support structure can be set according to actual requirements.

As an example, the supporting column 12 may be a rectangular parallelepiped structure with a rectangular cross section, and a plurality of holes are uniformly distributed on the supporting column 12 at intervals, and an axial direction of the holes is parallel to an axial direction of the supporting column 12. As shown in fig. 2, the support posts 12 are periodically perforated with cylindrical holes.

In the embodiment of the invention, the number, the size and the like of the holes on the supporting column 12 can be adaptively adjusted according to the size, the shock absorption requirement, the weight requirement and the like of the supporting column 12.

Preferably, the porosity of the support columns 12 may be 0.5-0.7, for example, 0.5, 0.6, 0.7. The void ratio means the ratio of the total area of the holes to the total rectangular area on the cross-sectional view shown in fig. 2. Through carrying out above-mentioned limited to the porosity, can reach the two excellent effects of lightweight and filtering of moving away to avoid possible earthquakes simultaneously.

Optionally, the number of rows and columns of holes is above 8. And when the cross-section of the supporting column 12 is rectangular, the number of rows and columns is consistent because the holes are uniformly distributed. For example, there may be 8 rows and 8 columns, 9 rows and 9 columns, etc.

The cross section of the support column 12 may have other shapes, for example, when the cross section of the support column 12 is rectangular, the number of holes may be set to 8 rows and 9 columns, 9 rows and 10 columns, etc.

When the holes are arranged, the supporting pillars 12 can be uniformly divided into a plurality of rectangular periodic units, and a cylindrical hole is arranged in each periodic unit. The centroid of each periodic unit is the same as the center of the hole. In this case, the porosity can also be expressed as a ratio of the diameter of the center of a circle to the side length of the periodic unit. See in particular fig. 3.

Further, the support column 12 and the cross beam 11 are detachably connected, for example, the detachable connection can be realized by plugging or bonding.

In summary, the satellite structure supporting system adopting porous phononic crystal shock absorption provided by the embodiment of the invention adopts a system architecture combining porous phononic crystal materials and a frame structure, so that weight reduction and filtering shock absorption of an internal structure of a satellite are realized, the structure can be assembled, and the size can be adjusted. Due to the design of the porous phononic crystal, a single period unit hole can be adjusted to deal with various working conditions.

The beneficial effects of the satellite structure supporting system adopting porous phononic crystal shock absorption provided by the embodiment of the invention are described in the following by combining specific data:

the finite element simulation energy band diagram of the porous phononic crystal material with the porosity of 0.63 is shown in FIG. 4, and the result shows that a complete forbidden band can be generated around 7000-12000Hz, which can block the propagation of elastic wave in any direction in the plane. Meanwhile, directional forbidden bands exist between 15000hz and 17000hz, and elastic wave propagation can be blocked in a fixed direction. Therefore, the satellite structure supporting system adopting the porous phononic crystal shock absorption provided by the embodiment of the invention can effectively prevent the propagation of vibration waves and has a good shock absorption effect.

It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. In addition, "front", "rear", "left", "right", "upper" and "lower" in this document are referred to the placement states shown in the drawings.

Finally, it should be noted that: the above examples are only for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A satellite structure supporting system adopting porous phononic crystal shock absorption is characterized by comprising at least one supporting mechanism;

each supporting mechanism comprises a beam and two supporting columns respectively positioned below two ends of the beam, the supporting columns are made of porous phonon crystal materials, and the supporting mechanisms are arranged between a component to be supported and the satellite shell;

the support column is the cuboid structure of rectangle for the cross-section, the support column evenly divides into the periodic unit of a plurality of rectangles, is provided with cylindrical hole in every periodic unit, the axial of hole is on a parallel with the axial of support column, just the centre of a circle of cylindrical hole is the same with the centroid of place periodic unit.

2. The satellite structural support system with cellular phononic crystal shock absorption according to claim 1, wherein the porosity of the support columns is 0.5-0.7.

3. The system of claim 1 or 2, wherein the number of rows and columns of holes is greater than 8.

4. The satellite structure support system with cellular phononic crystal shock absorption according to claim 1, wherein the support columns and the cross beam are detachably connected.