阅读说明：本技术 基于仿生的半硬式鱼骨结构飞艇 (Semi-rigid type fish bone structure airship based on bionics ) 是由 龚景海 邱国志 于 2020-07-17 设计创作，主要内容包括：一种基于仿生的半硬式鱼骨结构飞艇,包括：依次水平相连的头锥、艇体和尾椎以及设置于艇体外部的蒙皮,艇体的上部结构在弓形肋梁和气囊浮力支撑下保持稳定形态,艇体的下部结构采用柔性拉索并通过变形消除飞艇在下降过程中产生的负压,改善飞艇支承结构的受力状态,保证结构的安全。本发明采用刚性的弓形肋梁和柔性拉索共同作为飞艇的环向支撑体系,上部结构在弓形肋梁和气囊浮力支撑下,保持稳定形态,保证飞艇飞行和回收下降时的受力稳定,下半部采用柔性拉索,大幅度减小刚性骨架,降低飞艇结构重量,设计新颖,安全性高,有效载重量大。(A semi-rigid type fish bone structure airship based on bionics comprises: the airship comprises a nose cone, a hull and a tail cone which are horizontally connected in sequence and a skin arranged outside the hull, wherein the upper structure of the hull is kept in a stable form under the supporting of the arch rib beam and the buoyancy of an air bag, the lower structure of the hull adopts a flexible inhaul cable and eliminates the negative pressure generated by the airship in the descending process through deformation, the stress state of an airship supporting structure is improved, and the safety of the structure is ensured. The invention adopts the rigid arched rib beam and the flexible guy cable as the annular support system of the airship, the upper structure keeps stable shape under the buoyancy support of the arched rib beam and the air bag, the stable stress of the airship during flying and recovery descending is ensured, the lower half part adopts the flexible guy cable, the rigid framework is greatly reduced, the structural weight of the airship is reduced, the design is novel, the safety is high, and the effective load capacity is large.)

1. The utility model provides a semi-hard formula fish bone structure airship based on it is bionical which characterized in that includes: head cone, hull and the caudal vertebra that links to each other of level in proper order and set up in the outside covering of hull, wherein: covering the skin on the boat body;

the semi-hard fishbone structure is as follows: the upper structure of the airship body is kept in a stable state under the support of the arch-shaped rib beam and the buoyancy of the air bag, the lower structure of the airship body adopts the flexible inhaul cable and eliminates the negative pressure generated in the descending process of the airship through deformation, the stress state of the airship supporting structure is improved, and the safety of the structure is ensured.

2. The bionics-based semi-rigid fish-bone structure airship of claim 1, wherein the hull comprises: girder, bow-shaped rib roof beam, flexible ring cable, gasbag and radiation cable, wherein: the two ends of a main beam are respectively connected with a head cone and a tail cone, the arched rib beams are uniformly arranged on the upper half part of the main beam in parallel, the flexible ring cables are arranged around the airship for forming the annular hoop, the upper half part of the main beam is superposed with the arched rib beams, the positions of the radiation cables and the arched rib beams in the length direction of the airship are the same, one ends of the radiation cables are arranged on the main beam and are radially arranged by taking the main beam as the center, the other ends of the radiation cables are directly connected with the arched rib beams or the flexible ring cables or are connected through skins, and the air bags are.

3. The airship based on bionic semi-rigid fish bone structure as claimed in claim 1, wherein the pod is arranged at the bottom of the skin.

4. The airship of claim 1 where the skin is provided with a tail fin at the end near the caudal vertebra.

5. The airship based on bionic semi-rigid fish bone structure as claimed in claim 1, wherein the upper part of the hull is provided with a top longitudinal beam, wherein: the two ends of the top longitudinal beam are respectively connected with the end part of the main beam, and the middle of the top longitudinal beam is connected with the arched rib beam.

6. The airship of claim 1, wherein the arched rib is of an arch structure as a whole, the cross section of the arch rib is a circular tube or a square tube, and the overlapped part of the flexible ring cable and the arched rib passes through the middle of the arched rib.

Technical Field

The invention relates to the technology in the field of stratospheric airships, in particular to a bionic semi-rigid type fishbone structure airship.

Background

The airship mainly comprises a hull, a power device, an empennage and a nacelle. Airships are generally classified into rigid airships (rigid airships), blimps (non-rigid airships, or blimps), and semi-rigid airships (semi-rigidairship, or hybrid airships) in terms of structural form. The hard airship framework is huge, so that the weight of the airship structure can be increased; the shape of the blimp is maintained only by the air bag, and the shape is difficult to maintain when the internal pressure of the blimp is close to or less than the external pressure, so that the blimp fails; the semi-rigid airship maintains the shape of the airship body together with the rigid framework through the gas pressure in the air bag, combines the advantages of the two airships, and becomes the mainstream direction of the current development.

The existing semi-rigid framework structure adopts a ring beam or a ring truss as a ring support system, when the airship descends, the upper part of the ring beam is subjected to the outward buoyancy of an air bag, the lower part of the ring beam is generally subjected to the inward negative pressure of air pressure, the ring beam is stressed unevenly, the bending moment in the cross section is large, and the strength damage is very easy to generate. To improve the structural safety, it is often necessary to use a larger cross-section ring beam or ring truss, with a consequent increase in the weight of the airship structure.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a bionic semi-rigid type airship with a fishbone structure, wherein a rigid arched rib beam and a flexible inhaul cable are jointly used as a circumferential supporting system of the airship, the upper structure keeps a stable shape under the supporting of the arched rib beam and an air bag through buoyancy, the stable stress of the airship during flying and recovery descending is ensured, the lower half part adopts the flexible inhaul cable, the rigid framework is greatly reduced, the weight of the airship structure is reduced, the design is novel, the safety is high, the effective load capacity is large, and the economic benefit is good.

The invention is realized by the following technical scheme:

the invention relates to a bionic-based semi-rigid airship with a fishbone structure, which comprises: head cone, hull and the caudal vertebra that links to each other of level in proper order and set up in the outside covering of hull, wherein: the skin covers on the boat body.

The semi-hard fishbone structure is as follows: the upper structure of the airship body is kept in a stable state under the support of the arch-shaped rib beam and the buoyancy of the air bag, the lower structure of the airship body adopts the flexible inhaul cable and eliminates the negative pressure generated in the descending process of the airship through deformation, the stress state of the airship supporting structure is improved, and the safety of the structure is ensured.

The boat body comprises: girder, bow-shaped rib roof beam, flexible ring cable, gasbag and radiation cable, wherein: the two ends of a main beam are respectively connected with a head cone and a tail cone, the arched rib beams are uniformly arranged on the upper half part of the main beam in parallel, the flexible ring cables are arranged around the airship for forming the annular hoop, the upper half part of the main beam is superposed with the arched rib beams, the positions of the radiation cables and the arched rib beams in the length direction of the airship are the same, one ends of the radiation cables are arranged on the main beam and are radially arranged by taking the main beam as the center, the other ends of the radiation cables are directly connected with the arched rib beams or the flexible ring cables or are connected through skins, and the air bags are.

The bottom of the skin is provided with a nacelle.

One end of the skin close to the tail cone is provided with a tail wing.

Hull upper portion be equipped with the roof longeron, wherein: the two ends of the top longitudinal beam are respectively connected with the end part of the main beam, and the middle of the top longitudinal beam is connected with the arched rib beam.

Technical effects

The invention integrally solves the problem that the airship recovery test fails because the airship bears negative pressure in the recovery process of the existing semi-rigid stratospheric airship and the airship supporting structure loses stability, so that the speed of the airship descending process is too high and cannot be controlled; according to the bionic fish type airship supporting structure, the rigid ring or the rigid truss of the existing semi-rigid airship is changed into the rigid upper part and the flexible lower part through the structure of the bionic fish, and the negative pressure effect borne in the descending process of the airship structure is eliminated through the deformation of the flexible structure of the lower part, so that the stability of the airship supporting structure is ensured, and the safety in the airship recycling process is ensured.

Compared with the prior art, the rigid arched rib beam and the flexible ring cable jointly form an airship annular supporting structure, and compared with a full-rigid airship supporting ring or supporting truss, the airship annular supporting structure can improve the structural stability and bearing capacity, reduce the self weight of the airship structure and improve the effective load; the arched rib beam is not closed, so that the accurate matching of the sizes of the skin and the closed rigid ring or the rigid truss is not required, the processing precision requirement of the skin and the closed rigid ring or the rigid truss is greatly reduced, and the processing cost is reduced; the bow-shaped rib beam is only placed on the upper part of the airship, so that the difficulty in the assembling process of the airship is greatly reduced, large-scale equipment and temporary support are not needed in the assembling process, a skin structure does not need to be rolled, the assembling cost and the assembling time of the airship are greatly reduced, and the efficiency is improved.

The airship body adopts the rigid main beam, the arched rib beam, the flexible ring cable and the radial cable as main support systems of the airship, the arched rib beam on the upper half part of the airship body is shorter than the annular beam in the prior art, and meanwhile, the cross section area required by the arched rib beam is reduced, so that the skeleton is less, and the structure weight is lighter; the lower half part of the airship body adopts flexible ring cables and radiation cables, so that the safety of the lower airbag is ensured, the using amount of rigid components is reduced, and the structural weight of the airship is effectively reduced; in addition, bow-shaped rib roof beam forms the annular hoop with flexible ring cable jointly, eliminates the negative pressure that probably appears in the airship structure recovery process through the big deformation of flexible ring cable, when guaranteeing flight safety, has realized structural optimization and lightweight design.

Drawings

FIG. 1 is a schematic view of the present invention when the airbag is fully inflated;

FIG. 2 is a schematic view of the semi-inflated state of the bladder of the present invention;

FIG. 3 is a schematic view of a fishbone structure of the present invention;

FIG. 4 is a comparison graph of the stress of the fishbone structure (a) of the present invention and the stress of the semi-rigid structure (b);

FIG. 5 is a schematic diagram illustrating the effects of the embodiment;

in the figure: the main beam 1, the top longitudinal beam 2, the arched rib beam 3, the air bag 4, the tail cone 5, the nose cone 6, the skin 7, the nacelle 8, the radial cable 9, the flexible ring cable 10, the empennage 11 and the hull 12.

Detailed Description

As shown in fig. 1, the present embodiment relates to a bionic semi-rigid airship with a fishbone structure, which includes: nose cone 6, hull 12 and caudal vertebra 5 that link to each other horizontally in proper order and set up in hull outside skin 7, wherein: skin 7 covers hull 12.

The boat body 12 comprises: a main beam 1 for providing longitudinal rigidity, an arched rib 3, an air bag 4, a flexible looped cable 10 and a radial cable 9, wherein: the two ends of a main beam 1 are respectively connected with a nose cone 6 and a tail cone 5, an arch rib beam 3 is uniformly arranged on the upper half part of the main beam 1 in parallel, one end of a radial cable 9 is arranged on the main beam 1 and is radially arranged by taking the main beam 1 as a center, the other end of the radial cable 9 is connected with the arch rib beam 3 or a flexible ring cable 10 directly or through a skin 7, an air bag 4 is arranged between adjacent radial cables 9, the upward buoyancy of the air bag 4 is jointly transmitted to a top longitudinal beam 2 and the arch rib beam 3 through the skin 7 and then transmitted to the main beam 1 through the radial cable 9, and the upward floating and the submerging of the airship are realized through the buoyancy change of each air; the flexible annular cable 10 is arranged around the radial cable 9 for a circle to form an annular hoop for eliminating negative pressure generated in the recovery process of the airship structure.

The bottom of the skin 7 is provided with a nacelle 8.

And a tail wing 11 is arranged at one end of the skin 7 close to the tail cone.

The boat body 12 on be equipped with a plurality of top longerons 2, wherein: the two ends of the top longitudinal beam 2 are respectively connected with the end part of the main beam 1, and the middle of the top longitudinal beam is connected with the arched rib beam 3, so that the boat body 12 is provided with larger longitudinal rigidity, the relative position of the arched rib beam 3 is maintained, and the safety is better ensured.

The top longitudinal beam 2 and the flexible ring cable 10 are arranged inside and outside the skin.

The top longitudinal beam 2 can be a full-length or sectional rod piece and is consistent with the shape of the skin 7.

The arched rib beam 3 is of an arched structure as a whole, the section of the arched rib beam is a circular tube or a square tube, and the overlapped part of the flexible ring cable 10 and the arched rib beam 3 passes through the middle of the arched rib beam 3.

The rigid arched rib beam, the flexible ring cable and the radial cable are used as a ring-shaped supporting system of the airship together, the arched rib beam is shorter than the ring beam, the structural stress is reasonable, the cross section area of the arched rib beam is reduced, the framework is fewer, and the structural weight is lighter; the lower half part of the airship body adopts a flexible annular cable, and after the airbag at the lower part of the airship is filled in the whole airbag cabin, the flexible annular cable provides annular tension and radial tension to jointly bear the internal pressure action, so that the safety of the airbag at the lower part is ensured, and the structural weight of the airship is effectively reduced; in addition, bow-shaped rib roof beam forms the annular hoop with flexible ring cable jointly, eliminates the negative pressure that probably appears in the airship structure recovery process through the big deformation of annular hoop lower part, when the guarantee flight safety, has realized structural optimization and lightweight design.

In the embodiment, a stratospheric airship with the diameter of 32 meters is taken as an example, theoretical analysis is carried out, when the height of the airship is reduced to 10000m in the recovery process, the maximum bending moment value of the airship is 0.191kN.m in the invention in a graph 5a and 1.751kN.m in the beam in the existing closed rigid ring technology in a graph 5b by comparing the maximum bending moment value with the maximum bending moment value in the beam in the existing closed rigid ring technology, and the maximum bending moment of the rigid member in the invention is reduced by 89.1% compared with that in the prior art.

The foregoing embodiments may be modified in many different ways by those skilled in the art without departing from the spirit and scope of the invention, which is defined by the appended claims and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.