CN110395409A - A kind of large size single K-joint triangular truss stiffening ring and integrated tension force applying method - Google Patents
A kind of large size single K-joint triangular truss stiffening ring and integrated tension force applying method Download PDFInfo
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- CN110395409A CN110395409A CN201910707533.6A CN201910707533A CN110395409A CN 110395409 A CN110395409 A CN 110395409A CN 201910707533 A CN201910707533 A CN 201910707533A CN 110395409 A CN110395409 A CN 110395409A
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- triangular truss
- hub
- joint
- stiffening ring
- pipe
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C1/00—Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like
- B64C1/06—Frames; Stringers; Longerons ; Fuselage sections
- B64C1/061—Frames
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64F—GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
- B64F5/00—Designing, manufacturing, assembling, cleaning, maintaining or repairing aircraft, not otherwise provided for; Handling, transporting, testing or inspecting aircraft components, not otherwise provided for
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
- B64G1/00—Cosmonautic vehicles
- B64G1/22—Parts of, or equipment specially adapted for fitting in or to, cosmonautic vehicles
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- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
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- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Transportation (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
The invention discloses a kind of large-scale single K-joint triangular truss stiffening rings, it is characterized in that, including single K-joint triangular truss annulus, integrated center hub and radial pull rod, wherein the single K-joint triangular truss annulus connects the integrated center hub by the radial pull rod；The single K-joint triangular truss annulus is spliced by n standard segment, wherein the standard knot section includes exterior string pipe, interior string pipe, web member pipe, single K-joint and benchmark triangle frame；The integration center hub includes hub axle pipe and hub node；The radial direction pull rod is 2n root, is evenly arranged around the integrated center hub in spindle circumferential direction.The present invention also provides a kind of integrated tension force applying methods of large-scale single K-joint triangular truss stiffening ring.The overall stiffness of composite material truss, deformation under load ability and stability can be improved in the present invention, can be applied to large aerospace Flight Vehicle Structure and aerospace assembled type platform.
Description
Technical field
The present invention relates to composite structure technical fields more particularly to a kind of large-scale single K-joint triangular truss to put more energy into
Ring and integrated tension force applying method.
Background technique
Composite material has the characteristics that lightweight, high-strength, Gao Gang, endurance, and has designability and craftsmanship, extensively
Applied to aerospace and modern industry field.In aviation field, composite structure ratio is continuously increased, external at present advanced
Surpass 40% in aircraft, has had become the core technology index for measuring aircraft advance.It is flat in Large-scale satellite platform, space station
In platform, orbit detector, and modern dirigible structure, such as stratospheric airship, high-altitude solar energy unmanned plane etc. also uses composite wood
Expect truss structure or composite structure.
There are many researchs, such as IsoTruss in current stage about composite material truss structureTMStructure, vertical pole is continuous, spiral shell
It revolves brace and constitutes equilateral triangle, conceptually may be constructed very excellent mechanical property straight line truss, but configuration is very
Complexity needs whole winding knitting forming, it is difficult to realize large scale, big bearing structure；Full composite material truss structure-triangle
Tee section composite material entirety truss structure, core are to need fiber integrally to wind preparation, and be prepared for 6m long truss, are carried out
Bearing test research, but it is difficult to use in large-scale annular truss；A kind of patent " spliced triangular truss of large scale stiffening ring
(CN201910275698.0) " a kind of stiffening ring In A Thin-walled Tube of Composite truss, has been invented, the truss is triangular-section,
There are double K nodes and single K-joint, double K nodes are 2 times of single K-joint number.Double K node manufacture crafts are still more complex, and exterior string side is single
K node, side list K and double intervals K, configuration is inconsistent, and stress is asymmetric；The triangle connecting plate structure efficiency of segment module
It is low, weight is larger；Hub axle connection is complicated, power transmission is not direct, component and number of nodes are more, weight is big；It is direct by radial pull rod
Integrated, tensioning and adjusting control tension need a large amount of toolings and tensioning equipment, tension applies and control process is more complicated.
Therefore, those skilled in the art is dedicated to developing that a kind of configuration is consistent, node production is succinct, integrated and applies
Power is simply and effectively put more energy into ring structure, solves that weight of the existing technology is big, configuration is complicated, production is difficult, rigidity is low, tension
Apply complicated and big difficulty problem.
Summary of the invention
In view of the above drawbacks of the prior art, the technical problem to be solved by the present invention is to realize large-scale light high-stiffness
Truss stiffening ring and its tension apply.
To achieve the above object, the present invention provides a kind of large-scale single K-joint triangular truss stiffening ring, feature exists
In, including single K-joint triangular truss annulus, integrated center hub and radial pull rod, wherein the single K-joint triangular truss
Annulus connects the integrated center hub by the radial pull rod；
The single K-joint triangular truss annulus is spliced by n standard segment, wherein the standard knot section includes exterior string
Pipe, interior string pipe, web member pipe, single K-joint and benchmark triangle frame, it is preferable that the multiple that n is 4, annulus orthogonal thereto 1/4 is symmetrical, institute
It states exterior string pipe, interior string pipe, web member pipe and all passes through 3m single K-type node splicing, m is the exterior string pipe and the interior string pipe equal portions
Quantile；The integration center hub includes hub axle pipe and hub node；The radial direction pull rod is 2n root, in the integration
Heart hub is evenly arranged in spindle circumferential direction.
Further, single K-type node is die forming standard nodes, is 4 logical casing joints or connecting plate connector.
Further, single K-type node uses carbon-fibre reinforced epoxy resin composite material, prepreg three-dimensional laying at
Shape, it is preferable that 3 D weaving forming.
Further, the exterior string pipe, the interior string pipe, the web member pipe are ultra-thin tube, by high performance CFRP system
At, it is preferable that the radius-thickness ratio 60-100 of the ultra-thin tube.
Further, the benchmark triangle frame is equilateral or isosceles triangle, it is preferred that isosceles triangle minimum angle is not
Less than 45 °.
Further, hub axle pipe both ends are the outer convex pressure-bearing body of inner conical, are thin-walled CFRP pipe outside tube body, are inside
PMI foamed pipe, the PMI foam bore are less than taper bore, and the PMI foamed pipe has interior mold and structure enhancing one
Function；It is cup type PMI foam inside the outer convex pressure-bearing body of the inner conical, is managed outside for thin-walled CFRP, the pressure-bearing of the pressure-bearing body
Face is CFRP ring, and the cup type PMI foam has the function of enhancing and lightweight.
Further, the hub node is high-strength light alloy, it is preferable that the hub node uses aerolite
Or titanium alloy is contour than strong alloy material.
Further, the radial pull rod is unidirectional parallel high-modules carbon fibre twisting, then solid with epoxy construction resin infiltration
Change, it is preferable that for spiral angle less than 3 °/meter, carbon fiber is high-performance carbon fibre, high-strength carbon fibre or high-modules carbon fibre.
It is special the present invention also provides a kind of integrated tension force applying method of large-scale single K-joint triangular truss stiffening ring
Sign is, the described method comprises the following steps:
Step 1 carries out quality to radial direction pull rod described in the n standard segments, 2n root, 1 integrated center hub
It examines；
Step 2 is symmetrically positioned according to 1/4, and n standard segments of splicing are examined and splice precision, and control is described large-scale single
The circularity and diameter error of K node triangular truss stiffening ring meet design standard；
Step 3 integrates datum level using the large-scale single K-joint triangular truss stiffening ring central plane as installation, really
It protects the radial pull rod and is in initial geometry unstress state, the integration center hub tooling installs integrated base perpendicular to described
Quasi- face, two hub nodes are symmetrically placed in the integrated center hub tooling intermediate point, and the 2n radial pull rods are successively
Be linked in sequence the interior chord node and the hub node of the benchmark triangle frame；
Two hub nodes are symmetrically classified substep traction or pushing tow along the direction of both ends of the hub axle pipe by step 4,
The outer convex pressure-bearing surface of inner conical to hub axle pipe both ends, disposes the integrated center hub, then falls after rise to the hub
The outer convex pressure-bearing body of inner conical described in node contact is easy, efficiently applies to realize that stiffening ring is integrated；
Step 5 carries out quality inspection to the large-scale single K-joint triangular truss stiffening ring.
Further, the implementation of the step 4 uses special tooling.
Large scale composite structure may be implemented in the present invention, puts more energy into and truss overall stiffness can be improved, and improves truss and bears
Deformation under load ability, stability can be applied to large aerospace Flight Vehicle Structure, such as dirigible, unmanned plane and aerospace
Assembled type platform.
The present invention has following significant technical effect:
1, triangular truss is using all single K-type joint systems, and truss configuration is consistent, uniform force, single K-joint mold letter
Single, production and assembling are easy；
2, integrated center hub high-strength light Gao Gang, connecting component quantity is few, only hub node, power transmission is succinct, carrying can
It leans on, assembly is simple, light weight；
3, radial pull rod connects hub and stiffening ring benchmark triangle frame in stress-less length state, integrates simple be easy；
4, ring strain of putting more energy into applies to be formed through a set of tooling traction of center single-point or pushing tow hub node, then falls bearing after rise
In hub axle pressure-bearing convex, tension imports extremely simple efficient.
It is described further below with reference to technical effect of the attached drawing to design of the invention, specific structure and generation, with
It is fully understood from the purpose of the present invention, feature and effect.
Detailed description of the invention
Fig. 1 is the large-scale single K-joint triangular truss stiffening ring three-dimensional figure of a preferred embodiment of the invention；
Fig. 2 is the standard segment three-dimensional perspective of a preferred embodiment of the invention；
Fig. 3 is that three-dimensional perspective is decomposed in integrated center hub one end of a preferred embodiment of the invention；
Fig. 4 is the hub axle pipe front view of a preferred embodiment of the invention；
Fig. 5 is the integrated tension application figure of a preferred embodiment of the invention.
Specific embodiment
Multiple preferred embodiments of the invention are introduced below with reference to Figure of description, keep its technology contents more clear and just
In understanding.The present invention can be emerged from by many various forms of embodiments, and protection scope of the present invention not only limits
The embodiment that Yu Wenzhong is mentioned.
In the accompanying drawings, the identical component of structure is indicated with same numbers label, everywhere the similar component of structure or function with
Like numeral label indicates.The size and thickness of each component shown in the drawings are to be arbitrarily shown, and there is no limit by the present invention
The size and thickness of each component.Apparent in order to make to illustrate, some places suitably exaggerate the thickness of component in attached drawing.
Embodiment one
As shown in Figure 1, the large-scale single K-joint triangular truss stiffening ring for a preferred embodiment of the invention is three-dimensional
Figure, including single K-joint triangular truss annulus 1, integrated center hub 2 and radial pull rod 3.Wherein, single K-joint triangular truss
Annulus is n standard segment splicing, and the multiple that n is 4, annulus is in 1/4 symmetrical.
Single K-joint triangular truss annulus 1 is equilateral triangle truss, and equilateral triangle side length is a.It takes: single K-joint three
The outer circle ring diameter of angular truss annulus 1 is D1, inner circle ring diameter be D2, then: the outer arc length L of standard segment1=π D1/ n, inner arc
Long L2=π D2/n。
In embodiment, radial pull rod 3 is 2n root, and circumferential direction is evenly arranged, and is in spindle, for unidirectional parallel high-performance carbon fibre
Twisting, then solidify with epoxy construction resin infiltration, both ends connect dedicated node.Radial pull rod 3 is circular bar, long L3, diameter
d4, it is combined using parallel carbon fiber twisting, spiral angle is less than 3 °/meter.
Embodiment two
Fig. 1 is the large-scale single K-joint triangular truss stiffening ring three-dimensional figure of a preferred embodiment of the invention, including list
K node triangular truss annulus 1, integrated center hub 2, radial pull rod 3.Wherein, single K-joint triangular truss annulus is n
The splicing of standard segment, the multiple that n is 4, annulus are symmetrical in 1/4.
Single K-joint triangular truss annulus 1 is isosceles triangle truss, and isosceles triangle minimum angle is not less than 45 °.It takes:
The outer circle ring diameter of single K-joint triangular truss annulus 1 is D1, inner circle ring diameter be D2, then: the outer arc length L of standard segment1=π
D1/ n, interior arc length L2=π D2/n。
In embodiment, radial pull rod 3 is 2n root, and circumferential direction is evenly arranged, and is in spindle, for unidirectional parallel high-performance carbon fibre
Twisting, then solidify with epoxy construction resin infiltration, both ends connect dedicated node.Radial pull rod 3 is circular bar, long L3, diameter
d4, it is combined using parallel carbon fiber twisting, spiral angle is less than 3 °/meter.
Embodiment three
As shown in Fig. 2, being the standard segment three-dimensional perspective of a preferred embodiment of the invention.Standard segment is by 2
101,1 interior string pipes 102 of exterior string pipe and 6m web member pipe 103 are spliced by 3m single K-type node 104, and standard segment both ends are
Benchmark triangle frame 105, in one direction twist, m is standard segment equal portions quantile to each face web member 103.
In embodiment, single K-type node 104 is die forming standard nodes, is 4 logical casing joints or connecting plate connector, adopts
With carbon-fibre reinforced epoxy resin composite material, the forming of prepreg 3 D weaving laying；
Interior string pipe 102, web member pipe 103, exterior string pipe 101 are ultra-thin tube, and radius-thickness ratio 80, relevant calculation is as follows:
Choose: 101 diameter of exterior string pipe is d1, wall thickness t1；Interior 102 diameter d of string pipe2, wall thickness t2；103 diameter of web member pipe is
d3, wall thickness t3；
If: m is standard segment equal arc length number；
Then: interior string pipe 102 divides equally arc length, pitch L by m single K-type node 1042/m；Exterior string pipe 101 is by m single K-type
Node 104 divides equally arc length, pitch L1/m；Web member pipe 103 has 6m, and each side 2m is a, twist.
Example IV
As shown in figure 3, three-dimensional perspective is decomposed in integrated center hub one end for a preferred embodiment of the invention；One
Body center hub 2 includes hub axle pipe 201 and hub node 202, and hub node 202 is symmetrically connected to 201 both ends of hub axle pipe；
Embodiment five
As shown in figure 4, being the hub axle pipe front view of a preferred embodiment of the invention；201 both ends of hub axle pipe are inner cone
The outer convex pressure-bearing body 20103 of shape, tube body is outside thin-walled CFRP pipe 20101, and interior is PMI foamed pipe 20102, the PMI foamed pipe
20102 internal diameters are less than taper bore, and there is the PMI foamed pipe 20102 interior mold and structure to enhance a body function；The inner cone
It is cup type PMI foam inside the outer convex pressure-bearing body 20103 of shape, is managed outside for thin-walled CFRP, pressure-bearing surface is CFRP ring, the cup type
PMI foam has the function of enhancing and lightweight；
Embodiment six
As shown in figure 5, being the integrated tension application figure of a preferred embodiment of the invention.Large-scale single K-joint triangle
Truss stiffening ring central plane 4 connects stiffening ring benchmark triangle frame in datum level as integrated datum level, radial pull rod 3 is installed
Interior chord node 105 and hub node 202, then by special tooling traction or pushing tow hub node 202, until 201 end of hub axle pipe
Height H disposes integrated center hub, then falls after rise to hub node 202 and contact convex pressure-bearing body 20103 outside inner conical, thus
Realize that the integrated easy, tension of stiffening ring efficiently applies.
Structure size (D of the invention1, D2, a, n, etc.), part dimension (L1, L2, m, etc.), scantling (L3, L4, d1-
d5, t1-t5, H, etc.), radial draw-bar pull F, material selection, technological design can determine for concrete application.Composite material thin wall
High-performance carbon fibre and structure epoxy resin can be used in pipe, radial pull rod, and titanium alloy, aluminium lithium alloy, magnalium can be used in connector
Alloy etc..
The preferred embodiment of the present invention has been described in detail above.It should be appreciated that the ordinary skill of this field is without wound
The property made labour, which according to the present invention can conceive, makes many modifications and variations.Therefore, all technician in the art
Pass through the available technology of logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Scheme, all should be within the scope of protection determined by the claims.
Claims (10)
1. a kind of large size single K-joint triangular truss stiffening ring, which is characterized in that including single K-joint triangular truss annulus, one
Body center hub and radial pull rod, wherein the single K-joint triangular truss annulus passes through the radial pull rod connection described one
Body center hub；
The single K-joint triangular truss annulus is spliced by n standard segment, wherein the standard knot section include exterior string pipe, it is interior
String pipe, web member pipe, single K-joint and benchmark triangle frame；The integration center hub includes hub axle pipe and hub node；The diameter
It is 2n root to pull rod, is evenly arranged around the integrated center hub in spindle circumferential direction.
2. large size single K-joint triangular truss stiffening ring as described in claim 1, which is characterized in that the list K-type node is
Die forming standard nodes are 4 logical casing joints or connecting plate connector.
3. large size single K-joint triangular truss stiffening ring as described in claim 1, which is characterized in that the list K-type node is adopted
With carbon-fibre reinforced epoxy resin composite material, the forming of prepreg three-dimensional laying.
4. large size single K-joint triangular truss stiffening ring as described in claim 1, which is characterized in that the exterior string pipe, described
Interior string pipe and the web member pipe are ultra-thin tube, are made of high performance CFRP.
5. large size single K-joint triangular truss stiffening ring as described in claim 1, which is characterized in that the benchmark triangle
Frame is equilateral or isosceles triangle.
6. large size single K-joint triangular truss stiffening ring as described in claim 1, which is characterized in that hub axle pipe both ends
For convex pressure-bearing body outside inner conical, tube body is thin-walled CFRP pipe outside, and interior is PMI foamed pipe.
7. large size single K-joint triangular truss stiffening ring as described in claim 1, which is characterized in that the hub node is
High-strength light alloy.
8. large size single K-joint triangular truss stiffening ring as described in claim 1, which is characterized in that the radial direction pull rod is
Unidirectional parallel high-modules carbon fibre twisting, then solidify with epoxy construction resin infiltration.
9. a kind of integrated tension force applying method of large size single K-joint triangular truss stiffening ring, which is characterized in that the method packet
Include following steps:
Step 1 carries out quality inspection to radial direction pull rod described in the n standard segments, 2n root, 1 integrated center hub；
Step 2 is symmetrically positioned according to 1/4, and n standard segments of splicing are examined and splice precision, the control large size list K section
The circularity and diameter error of point triangular truss stiffening ring meet design standard；
Step 3 integrates datum level using the large-scale single K-joint triangular truss stiffening ring central plane as installation, it is ensured that institute
It states radial pull rod and is in initial geometry unstress state, the integration center hub tooling installs integrated benchmark perpendicular to described
Face, two hub nodes are symmetrically placed in the integrated center hub tooling intermediate point, and the 2n radial pull rods are successively suitable
Sequence connects the interior chord node and the hub node of the benchmark triangle frame；
Two hub nodes are symmetrically classified substep traction or pushing tow along the direction of both ends of the hub axle pipe by step 4, until institute
The pressure-bearing surface for stating the outer convex pressure-bearing body of inner conical at hub axle pipe both ends, disposes the integrated center hub, then falls after rise to described
The outer convex pressure-bearing body of inner conical described in hub node contact is easy, efficiently applies to realize that stiffening ring is integrated；
Step 5 carries out quality inspection to the large-scale single K-joint triangular truss stiffening ring.
10. as claimed in claim 9, which is characterized in that the implementation of the step 4 uses special tooling.
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| CN201910707533.6A CN110395409B (en) | 2019-08-01 | 2019-08-01 | Large single-K-node triangular truss stiffening ring and integrated tension applying method |
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| CN201910707533.6A CN110395409B (en) | 2019-08-01 | 2019-08-01 | Large single-K-node triangular truss stiffening ring and integrated tension applying method |
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| CN111155646A (en) * | 2020-01-16 | 2020-05-15 | 上海交通大学 | Node for large triangular-section composite circular tube truss |
| CN112706912A (en) * | 2020-12-29 | 2021-04-27 | 中国航空工业集团公司西安飞机设计研究所 | Force transmission structure of asymmetric ellipsoid |
| CN113173256A (en) * | 2021-05-11 | 2021-07-27 | 上海交通大学 | Ultra-large type tensioning integral keel structure integration tool and method thereof |
| WO2022068238A1 (en) * | 2020-09-30 | 2022-04-07 | 上海交通大学 | Tensioning method for tensioning integral keel |
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| Publication number | Publication date |
|---|---|
| CN110395409B (en) | 2022-11-01 |
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