A multi-stage corrugated sandwich cylinder

Abstract

This invention discloses a multi-stage corrugated sandwich cylinder structure, belonging to the field of simplified structures. While meeting structural resistance requirements, the multi-stage corrugated sandwich cylinder enhances the structural bending stiffness, further reduces the structural weight, and improves the structural capacity to withstand local buckling. The structure includes: an inner panel, an outer panel, and a multi-stage corrugated sandwich layer; the top and bottom of the corrugations in the multi-stage corrugated sandwich layer are respectively connected to the outer panel and the inner panel; the corrugated cells of the multi-stage corrugated sandwich layer are arrayed along the circumference of the cylindrical shell and extend along the generatrix of the cylindrical shell.

Description

Technical Field

[0001] This invention belongs to the field of simplified structure, and particularly relates to a multi-stage corrugated sandwich cylinder. Background Technology

[0002] Cylindrical structures have a wide range of applications in the structural field, such as satellite sandwich structures, rocket load-bearing cylinder structures, missile shell structures, aircraft fuselages, submarine main structures, and engine casings. In terms of manufacturing processes, the complex fabrication of sandwich structures and their poor repeatability have become pressing issues that need to be addressed. In recent years, with the continuous development of 3D printing technology, more and more complex structures can be fabricated, broadening the field of structural design and allowing for increasingly complex structures. Corrugated sandwich structures, due to their high porosity, high specific strength, and good geometric topological designability, can ensure structural stiffness and strength while meeting the requirements of lightweight construction, and possess multifunctional potential. Summary of the Invention

[0003] This invention provides a multi-stage corrugated sandwich cylinder that, while meeting structural resistance requirements, enhances the bending stiffness of the structure, further reduces structural weight, and improves its local buckling bearing capacity.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A multi-level corrugated sandwich cylinder structure includes: an outer panel, an inner panel, and multiple layers of multi-level corrugated sandwich layers; the outer and inner sides of the multiple layers of multi-level corrugated sandwich layers are respectively connected to the outer panel and the inner panel; the multiple layers of multi-level corrugated sandwich layers include multiple layers of multi-level corrugated sandwich layers from the outside to the inside; the multi-level corrugated sandwich layers are composed of corrugated cells arrayed along the circumference of the cylindrical shell and extending along the generatrix direction of the cylindrical shell, each corrugated cell comprising an inner panel, a middle panel, an outer panel, a corrugated web, and a corrugated sandwich web; the corrugated sandwich web of each corrugated cell is composed of small corrugated sandwich cells arrayed along the web direction.

[0006] The corrugated web and the corrugated interlayer web have an inclination angle, that is, a corresponding central angle.

[0007] The inner and outer panels of the multi-level corrugated sandwich structure are at the same height and are connected to the corrugated core.

[0008] Beneficial effects: This invention provides a multi-stage corrugated sandwich cylinder with high porosity, high specific strength, and good geometric topological designability. This allows it to maintain structural stiffness and strength while meeting the requirements of lightweight. Furthermore, the use of corrugated sandwich structures in the inner and outer panels and the corrugated sandwich structure can enhance the bending stiffness of the structure while meeting the structural resistance requirements, further reducing the structural weight and improving its local buckling bearing capacity. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the cross-section of the multi-stage corrugated sandwich cylinder structure in an embodiment of the present invention;

[0010] Figure 2 This is an isometric schematic diagram of the multi-stage corrugated sandwich cylinder structure in an embodiment of the present invention;

[0011] Figure 3 This is a schematic diagram of the cell cross-section of the multi-level corrugated sandwich tube structure in an embodiment of the present invention;

[0012] Among them, 1-outer panel; 2-first-layer multi-level corrugated interlayer; 3-second-layer multi-level corrugated interlayer; 4-third-layer multi-level corrugated interlayer; 5-inner panel; 6-inner panel of multi-level corrugated interlayer; 7-outer panel of multi-level corrugated interlayer.

[0013] C1 - Inner plate of cell; C2 - Middle plate of cell; C3 - Outer plate of cell; C4 - Corrugated web of cell a; C5 - Corrugated interlayer web of cell; C6 - Corrugated web of cell b. Detailed Implementation

[0014] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments:

[0015] like Figure 1 and Figure 2 As shown, a multi-level corrugated sandwich cylinder includes: an outer panel 1, an inner panel 5, and multiple multi-level corrugated core layers; the outer and inner sides of the multiple multi-level corrugated core layers are respectively connected to the outer panel and the inner panel; the multiple multi-level corrugated core layers include, from the outside to the inside, a multi-level corrugated sandwich layer 2, a multi-level corrugated sandwich outer panel 7, a second multi-level corrugated sandwich layer 3, a multi-level corrugated sandwich inner panel 6, and a third multi-level corrugated sandwich layer 4;

[0016] The structure adopts a multi-layered design, which can enhance the bending stiffness of the structure while meeting the structural resistance requirements, further reduce the structural weight, and improve its local buckling bearing capacity.

[0017] Each multi-level corrugated interlayer is composed of corrugated cells arrayed along the circumference of the cylindrical shell and extending along the generatrix of the cylindrical shell; the arrangement of corrugated cells in each level of the same corrugated interlayer follows the same pattern.

[0018] like Figure 3As shown, the corrugated cell includes an inner cell panel C1, a middle cell panel C2, an outer cell panel C3, a corrugated cell web aC4, a corrugated cell web bC6, and a corrugated cell sandwich web C5. The corrugated cell sandwich web C5 is located between two middle cell panels C2. The outer sides of the two middle cell panels C2 are the corrugated cell web aC4 and the corrugated cell web bC6, respectively. The other side of the corrugated cell web aC4 is the inner cell panel C1, and the other side of the corrugated cell web bC6 is the outer cell panel C3.

[0019] The corrugated sandwich web C5 is composed of small corrugated sandwich cells arranged in an array along the web direction; the corrugated sandwich web C5 has an inclination angle with a central angle of [0°, 90°);

[0020] The corrugated web of the cell has an inclination angle with a central angle of [0°, 90°), so as to Figure 3 The schematic symmetrical face is used to show another web, which is then arranged in a circumferential periodic array in the form of symmetrical group cells; the distance between the cell corrugated web aC4 and cell corrugated web bC6 is [0, 2πR / N]; where R is the radius of the corresponding layer panel and N is the number of cells.

[0021] The above are merely preferred embodiments of the present invention, which will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that for those skilled in the art, any modifications and improvements made without departing from the concept of the present invention are within the protection scope of the present invention.

Claims

1. A multi-stage corrugated sandwich cylinder, characterized in that, include: The structure comprises an outer panel, an inner panel, and a multi-layered, multi-level corrugated core layer. The outer and inner sides of the multi-layered, multi-level corrugated core layer are respectively connected to the outer panel and the inner panel. The multi-layered, multi-level corrugated core layer, from the outside in, consists of a first-level corrugated layer, a multi-level corrugated outer panel, a second-level corrugated layer, a multi-level corrugated inner panel, and a third-level corrugated layer. Each multi-level corrugated core layer is composed of corrugated cells arrayed along the circumference of the cylindrical shell and extending along the generatrix of the cylindrical shell. The arrangement of corrugated cells in each level of the same layer follows a consistent pattern. The corrugated cell comprises an inner cell panel, a middle cell panel, an outer cell panel, a corrugated cell web, and a corrugated cell sandwich web. The corrugated cell sandwich web is located between two middle cell panels, with corrugated cell web a and corrugated cell web b on the outer sides of the two middle cell panels, respectively. The other side of corrugated cell web a is the inner cell panel, and the other side of corrugated cell web b is the outer cell panel. The corrugated cell sandwich web has a central angle of [0°, 90°) and is composed of small corrugated cell sandwiches arranged in an array along the web direction.

2. The multi-stage corrugated sandwich cylinder according to claim 1, characterized in that, The corrugated web a and corrugated web b of the cell element have an inclination angle of [0°, 90°) and are arranged in a symmetrical array along the circumference of the cylindrical shell.

3. The multi-stage corrugated sandwich cylinder according to claim 1 or 2, characterized in that, The distance between the corrugated web a and corrugated web b is [0, 2πR / N], where R is the radius of the corresponding layer panel and N is the number of cells.

4. The multi-stage corrugated sandwich cylinder according to claim 1, characterized in that, The inner panel and the outer panel are at the same height.

Images