CN110671399B - Modular connecting node for large triangular composite material pipe truss - Google Patents
Modular connecting node for large triangular composite material pipe truss Download PDFInfo
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- CN110671399B CN110671399B CN201910864614.7A CN201910864614A CN110671399B CN 110671399 B CN110671399 B CN 110671399B CN 201910864614 A CN201910864614 A CN 201910864614A CN 110671399 B CN110671399 B CN 110671399B
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- 239000002131 composite material Substances 0.000 title claims abstract description 32
- 239000004918 carbon fiber reinforced polymer Substances 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 7
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 claims abstract description 6
- 230000007704 transition Effects 0.000 claims abstract description 6
- 239000011185 multilayer composite material Substances 0.000 claims abstract description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 10
- 239000000956 alloy Substances 0.000 claims description 7
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 3
- 229910001234 light alloy Inorganic materials 0.000 claims description 3
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 claims 1
- 239000000126 substance Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 10
- 239000004229 Alkannin Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 230000010354 integration Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 229920000049 Carbon (fiber) Polymers 0.000 description 4
- 239000004917 carbon fiber Substances 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 229910003460 diamond Inorganic materials 0.000 description 3
- 239000010432 diamond Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 239000011165 3D composite Substances 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
- F16B7/18—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections using screw-thread elements
-
- 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
- B64C1/065—Spars
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
Abstract
The invention discloses a modular connection node of a large triangular composite material pipe truss, which relates to the technical field of composite material pipe truss structures and comprises a triangular connector, a pipe end node A, a pipe end node B, a pipe end node C and a bolt pair; the triangular connector comprises a rod, three corner gusset plates and a nesting piece; the pipe end nodes are of three types, one type comprises a chord pipe connecting sleeve and a connecting flange; the other two types are provided with one or two more web member pipe connecting sleeves; the middle section of the rod is a rhombic section, and two ends of the rod are in rhombic transition to a flat rectangle; the shell of the rod is a high-performance CFRP multi-layer composite material thin-wall pipe, and PMI filling material is arranged in the rod; the rod is formed in one piece. The invention can realize the modular connection of the large triangular composite pipe truss, and has the advantages of light weight, high strength, high rigidity, designability of performance and process, integrated forming, simple and reliable connection, stable rod piece, high bearing capacity, low requirement on geometric tolerance and the like.
Description
Technical Field
The invention relates to the technical field of composite material pipe truss structures, in particular to a large triangular composite material pipe truss modularized connecting node.
Background
The composite material truss structure has the advantages of light weight, high rigidity, vibration resistance, fatigue resistance and the like, and is widely applied to the field of modern industrial equipment such as aerospace and the like. Thin-walled circular tubes (CHS), thin-walled rectangular tubes (RHS) or square tubes (SHS) are the most commonly used composite tube structures with high structural efficiency and mature materials and structural processes. The triangular truss and the quadrilateral truss are the most basic three-dimensional composite material structures, the triangular truss has few rod pieces, light weight and high rigidity, and a large-scale composite material structure can be expanded by adopting a modular system, so that the method is an effective way for improving the design, manufacture and integration efficiency. However, due to the limitations of geometric, mechanical, manufacturing and integration processes, the truss modular connection node is always a technical difficulty in the field of composite material structural engineering.
At present, the connection technology of the composite truss structure mainly comprises the following three types:
1. the combined connection between two longitudinal aluminum alloy trusses of Zeppelin NT airship keel and two circular tube CFRP triangular truss girders is realized, namely, the two longitudinal triangular aluminum alloy trusses pass through a triangular aluminum alloy partition plate, the ends of the two circular tube CFRP triangular truss girders are aluminum alloy tripod joints, and then the triangular aluminum alloy partition plate is connected. But this is a structurally integrated connection without the CFRP pipe truss modular connection nodes.
2. The large-scale stiffening ring splicing type triangular truss is connected, namely the circular triangular truss is spliced by a plurality of segment modules in sequence, and triangular connecting plates are arranged at two ends of the truss. The connecting technology has the defects that the plane connecting plate is large in size, heavy in weight and low in rigidity outside the plane, instability outside the plane is easy to occur, and meanwhile, the connection between the truss and the gusset plate body is unclear.
3. The large single-K-node triangular truss stiffening ring is connected with an integrated tension applying method, namely, the single-K-node triangular truss circular ring is spliced by a plurality of standard sections and connected through a reference triangular frame. However, the structural form of the reference triangular frame of the connection technology is not clear, and the connection relation between the truss standard segment and the reference triangular frame is not clear.
Therefore, technical personnel in the field are dedicated to develop a large triangular composite material pipe truss modularized connecting node which is simple to manufacture, reasonable in structural stress and force transmission, light in weight, easy to install and integrate and simple and reliable in connection, and the problems that the existing composite material truss connection needs aluminum alloy structural connection, the structure is complex, the manufacturing is difficult, the weight is large, the stress is small and the like are solved.
Disclosure of Invention
In view of the above defects in the prior art, the technical problem to be solved by the invention is how to overcome the limitations of geometry, mechanics, manufacturing and integration processes in the existing composite material truss structure connection technology, and realize the modularized connection of the large composite material pipe truss.
In order to achieve the purpose, the invention provides a modular connection node of a large triangular composite material pipe truss, which comprises a triangular connection body, a pipe end node A, a pipe end node B, a pipe end node C and a bolt pair; wherein the triangular connector comprises a rod, a corner gusset plate D, a corner gusset plate E, a corner gusset plate F, and a nest; the pipe end node A comprises a chord pipe connecting sleeve and a connecting flange G; the pipe end node B comprises a chord pipe connecting sleeve, a connecting flange H and a web member pipe connecting sleeve; the pipe end joint C comprises chord pipe connecting sleeves, connecting flanges J and 2 web member pipe connecting sleeves; the bolt pair comprises a connecting bolt, a nut and a washer; the middle section of the rod is a rhombic section, and two ends of the rod are in rhombic transition to a flat rectangle; the shell of the rod is a high-performance CFRP multi-layer composite material thin-walled tube, and PMI filling material is arranged in the rod; the rod is formed in one piece.
Further, 2 pipe end nodes a, B and C are provided in pairs.
Furthermore, there are 3 rods, and the two ends of 3 rods are respectively nested in the corresponding corner gusset plate D, corner gusset plate E and corner gusset plate F, and coaxial holes are drilled.
Further, 3 nesting pieces are respectively nested in the corner gusset plate D, the corner gusset plate E and the corner gusset plate F, and coaxial holes are drilled.
Furthermore, the connecting flange G is formed twice, the connecting flange with the thickness of 1/6-1/3 and the chord pipe connecting sleeve are integrally solidified and formed once, and the rest unfinished connecting flanges are formed by secondary cementing.
Furthermore, the connecting flange H is formed twice, the connecting flange with the thickness of 1/6-1/3, the chord pipe connecting sleeve and the web member pipe connecting sleeve are integrally solidified and formed once, and the rest unfinished connecting flanges are formed by secondary cementing.
Further, the connecting flange J is formed twice, the connecting flange with the thickness of 1/6-1/3, the chord pipe connecting sleeve and 2 web member pipe connecting sleeves are integrally solidified and formed once, and the rest unfinished connecting flanges are formed by secondary cementing.
Further, coaxial holes are drilled in the corresponding corner gusset plate D, corner gusset plate E and corner gusset plate F respectively for 1 pair of the connecting flanges G, 1 pair of the connecting flanges H and 1 pair of the connecting flanges J.
Furthermore, the bolt pair is a self-locking anti-loose bolt pair special for aerospace, and is made of high-strength light alloy materials and needs to be connected in a pre-tightening mode.
Further, the nesting piece is made of high-strength light titanium alloy or aluminum alloy material.
Further, the pipe end node A2, the pipe end node B3 and the pipe end node C4 adopt a high-performance carbon fiber composite multilayer structure.
Compared with the prior art, the implementation of the invention achieves the following obvious technical effects:
1. the node main body of the invention adopts carbon fiber composite materials to replace aluminum alloy materials, has light weight, high strength, reasonable structural stress and force transmission, stable rod piece and large bearing capacity, and realizes the modularized connection of the large-scale composite material pipe truss.
2. The invention optimizes the structural form and the arrangement mode of the modularized connecting nodes of the large triangular composite material pipe truss, improves the modularized connecting technology of the large composite material pipe truss, and has the advantages of simple structure, easy installation and integration, and designability of performance and process.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.
Drawings
FIG. 1 is a three-dimensional view of a large triangular composite tube truss modular connection node according to a preferred embodiment of the invention;
FIG. 2 is a schematic illustration of pipe end node A of the present invention;
FIG. 3 is a schematic diagram of a pipe end node B of the present invention;
FIG. 4 is a schematic illustration of a pipe end node C of the present invention;
FIG. 5 is a three-dimensional view of a triangular connector of the present invention;
FIG. 6 is a cross-sectional view of the mid-section of the stem of the triangular connector of the present invention;
wherein: 1-triangular connector, 101-rod, 10101-rod housing, 10102-PMI filler material, 102-corner gusset plate D, 103-corner gusset plate E, 104-corner gusset plate F, 105-nest, 2-pipe end node A, 3-pipe end node B, 4-pipe end node C, 201-chord pipe connecting sleeve, 202-connecting flange G, 301-chord pipe connecting sleeve, 302-connecting flange H, 303-web pipe connecting sleeve, 401-chord pipe connecting sleeve, 402-connecting flange J, 403-web pipe connecting sleeve, 404-web pipe connecting sleeve, 5-connecting bolt pair, 501-connecting bolt, 502-nut, 503-washer.
Detailed Description
The technical contents of the preferred embodiments of the present invention will be more clearly and easily understood by referring to the drawings attached to the specification. The present invention may be embodied in many different forms of embodiments and the scope of the invention is not limited to the embodiments set forth herein.
In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components may be exaggerated where appropriate in the figures to improve clarity. In order to ensure clarity and conciseness of the attached images, some devices are not shown in the drawings, but do not affect the understanding of the invention by those of ordinary skill in the relevant art.
As shown in fig. 1, 2, 3, 4, 5 and 6, the modular connection node of the large triangular composite material pipe truss comprises a triangular connection body 1, a pipe end node a2, a pipe end node B3, a pipe end node C4 and a connection bolt pair 5. The triangular connecting body 1 is a large triangular composite material pipe truss modular connecting node main body and comprises a rod 101, a corner node plate D102, a corner node plate E103, a corner node plate F104 and a nesting piece 105. The pipe end node a2 includes a chord pipe connection sleeve 201 and a connection flange G202; the pipe end node B3 comprises a chord pipe connecting sleeve 301, a connecting flange H302 and a web member pipe connecting sleeve 303; the pipe end node C4 includes a chord pipe connection sleeve 401, a connection flange J402, a web pipe connection sleeve 403, and a web pipe connection sleeve 404. The bolt pair 5 includes a connecting bolt 501, a nut 502, and a washer 503.
The middle section of the rod 101 is a diamond-shaped section as shown in fig. 6, and two ends of the rod are diamond-shaped and transition to a flat rectangle; the rod shell 10101 of the rod 101 is a high-performance CFRP multi-layer composite material thin-wall pipe, PMI filling material 10102 is filled in the rod, and the rod 101 is formed in one step. The rods 101 have 3 rods, and the two ends of the 3 rods 101 are respectively nested in the corresponding corner gusset plates D102, E103 and F104, and coaxial holes are drilled.
Each of the pipe end node a2, the pipe end node B3, and the pipe end node C4 has 2, and are provided in pairs. The connecting sleeve can adapt to different geometrical configurations of the triangular truss, and the connecting sleeve, the chord pipe and the web rod pipe are in adhesive connection by being sleeved outside.
There are 3 nests 105 that are nested within corner gusset plate D102, corner gusset plate E103, and corner gusset plate F104, respectively, and are drilled with coaxial holes.
The connecting flange G202 is formed twice, the connecting flange with the thickness of 1/6-1/3 and the chord pipe connecting sleeve 201 are integrally solidified and formed once, and the rest unfinished connecting flanges are formed by secondary cementing. The connecting flange H302 is formed twice, the connecting flange with the thickness of 1/6-1/3, the chord pipe connecting sleeve 301 and the web member pipe connecting sleeve 303 are integrally solidified and formed once, and the rest unfinished connecting flanges are formed by secondary cementing. The connecting flange J402 is formed twice, the connecting flange with the thickness of 1/6-1/3, the chord pipe connecting sleeve 401, the web member pipe connecting sleeve 403 and the web member pipe connecting sleeve 404 are integrally solidified and formed once, and the rest unfinished connecting flanges are formed by secondary cementing.
Coaxial holes are drilled in the 1 pair of connecting flanges G202, the 1 pair of connecting flanges H302, and the 1 pair of connecting flanges J402 respectively in cooperation with the corresponding corner gusset plate D102, corner gusset plate E103, and corner gusset plate F104. Bolts of the bolt pair penetrate through the coaxial holes, and the bolt pair connects and fixes two ends of the rod 101 of the triangular connecting body 1 with the corresponding pipe end node A2, pipe end node B3, pipe end node C4, corner node plate D102, corner node plate E103 and corner node plate F104 respectively; 3 nests 105 are connected and fixed to the pipe end node a2, the pipe end node B3, the pipe end node C4, the corner node plate D102, the corner node plate E103, and the corner node plate F104, respectively.
The bolt pair 5 is a self-locking anti-loose bolt pair special for aerospace, is made of high-strength light alloy materials and needs to be connected in a pre-tightening mode. The nest 105 is made of high-strength light titanium alloy or aluminum alloy material. The pipe end node A2, the pipe end node B3 and the pipe end node C4 are of a high-performance carbon fiber composite multilayer structure.
Example (b):
pipe end node a 2: the chord pipe connecting sleeve 201 is
T700S, ply [ +/-45 °/0 °/0 °/0 ° ]]3, the thickness of the connecting flange G202, the connecting flange H302 and the connecting flange J402 is 2.0, the thickness of the connecting bolt pair 5 is M5, the thickness of the corner gusset plate D102, the thickness of the corner gusset plate E103 and the thickness of the corner gusset plate F104 are 3.0, T700S, and the thickness of the layer [ +/-45 °/0 °/0 ° C °]6. 0.5 thickness (T700S, ply [ +/-45 °/0 °/0 °/0 ° ]]) The connecting flange and the chord member pipe connecting sleeve are integrally cured and formed at one time, and the connecting flange with the thickness of 1.5 (15 layers of twill cloth) is formed by secondary cementation.
Pipe end node B3 and pipe end node C4:
chord tube connecting sleeve 301 and chord tube connecting sleeve 401 are
T700S, ply [ +/-45 °/0 °/0 °/0 ° ]]3, the web member pipe connecting sleeve 303, the web member pipe connecting sleeve 403 and the web member pipe connecting sleeve 404 are all
T700S, ply [ +/-45 °/0 °/0 ° ]]2, the connecting flange 20102 is 2.0, the connecting bolt pair 3 is M5, the corner gusset plate 10201 is 3.0, T700S, ply [ +/-45 °/0 °/0 °/0 °]6. 0.5 thickness (T700S, ply [ +/-45 °/0 °/0 °/0 ° ]]) The connecting flange is connected with the chord member pipeThe sleeve is integrally cured and formed at one time, and the connecting flange with the thickness of 1.5 (15 layers of twill cloth) is formed by secondary cementation.
Triangular connecting body: the triangular connector is 650 in positioning side length, 518 in a diamond section, 30 in a transition section, 30 multiplied by 3-5 in a rectangle at the end part and 3-5 in a corner gusset plate thickness.
A rod: a diamond-shaped cross section in the middle section, two acute angles cut off with 3 long sides, the distance between the two sides is 30, the distance between two obtuse angles is 20, the obtuse angle becomes an arc with a radius of 5, the wall thickness of the rod shell is 0.8, and the prepreg T800 and a layer structure [ +45 °/0 ° × 10/-45 ° ].
The structural size (the side length of a reference triangular connector, the length of a diamond rod, the length of a transition section, the size of the section of the diamond rod, the thickness of a corner joint plate, the diameter of a positioning hole, the diameter of a nested part, the diameter and the wall thickness of a chord pipe connecting sleeve and a web member pipe connecting sleeve, the diameter and the thickness of a connecting flange and the diameter and the length of a connecting bolt pair) can be determined according to specific application, and the process design can be determined according to specific application. The composite material thin-wall pipe and the connection thereof adopt the carbon fiber model, the resin model, the laying design and the forming process design, and can be determined according to specific application.
The device of the invention has three types of pipe end nodes, namely a pipe end node A2, a pipe end node B3 and a pipe end node C4, which can be used at one corner of a triangular connector 1 or used at the same corner or at two corners and can be determined according to requirements.
The invention optimizes the structural form and the arrangement mode of the modularized connecting nodes of the large triangular composite material pipe truss, improves the modularized connecting technology of the large composite material pipe truss, and has the advantages of simple structure, easy installation and integration, and designability of performance and process.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (3)
1. A modularized connecting node of a large triangular composite material pipe truss is characterized by comprising a triangular connecting body, a pipe end node A, a pipe end node B, a pipe end node C and a bolt pair; wherein the content of the first and second substances,
the triangular connector comprises a rod, a corner gusset plate D, a corner gusset plate E, a corner gusset plate F and a nesting piece;
the number of the pipe end nodes A, the number of the pipe end nodes B and the number of the pipe end nodes C are respectively 2, and the pipe end nodes A, the pipe end nodes B and the pipe end nodes C are arranged in pairs; the pipe end node A comprises a chord pipe connecting sleeve and a connecting flange G; the pipe end node B comprises a chord pipe connecting sleeve, a connecting flange H and a web member pipe connecting sleeve; the pipe end joint C comprises chord pipe connecting sleeves, connecting flanges J and 2 web member pipe connecting sleeves;
the bolt pair comprises a bolt, a nut and a washer;
the pipe end node A, the pipe end node B and the pipe end node C are connected with the triangular connecting body through the bolt pair;
the middle section of the rod is a rhombic section, and two ends of the rod are in rhombic transition to a flat rectangle; the shell of the rod is a high-performance CFRP multi-layer composite material thin-walled tube, and PMI filling material is arranged in the rod; the rod is formed in one step;
the number of the rods is 3, and two ends of the 3 rods are respectively embedded in the corresponding corner gusset plate D, the corner gusset plate E and the corner gusset plate F, and coaxial holes are drilled;
3 nesting pieces are respectively nested in the corner gusset plate D, the corner gusset plate E and the corner gusset plate F, and coaxial holes are drilled;
the connecting flange G is formed twice, the connecting flange with the thickness of 1/6-1/3 and the chord pipe connecting sleeve are integrally solidified and formed once, and the rest unfinished connecting flange is formed by secondary cementing;
the connecting flange H is formed twice, the connecting flange with the thickness of 1/6-1/3, the chord pipe connecting sleeve and the web member pipe connecting sleeve are integrally solidified and formed once, and the rest unfinished connecting flanges are formed by secondary cementing;
the connecting flange J is formed twice, the connecting flange with the thickness of 1/6-1/3, the chord pipe connecting sleeve and 2 web member pipe connecting sleeves are integrally solidified and formed once, and the rest unfinished connecting flanges are formed by secondary cementing;
and 1 pair of the connecting flanges G, 1 pair of the connecting flanges H and 1 pair of the connecting flanges J are respectively matched with the corresponding corner gusset plate D, the corner gusset plate E and the corner gusset plate F to be drilled with coaxial holes.
2. The modular large triangular composite pipe truss connection node of claim 1, wherein the bolt pairs are self-locking and anti-loosening bolt pairs special for aerospace, and are made of high-strength light alloy materials and are connected in a pre-tightening manner.
3. A large triangular composite tube truss modular connection node as claimed in claim 1, wherein the nest is made of high strength lightweight titanium alloy or magnesium aluminum alloy material.
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| CN201910864614.7A CN110671399B (en) | 2019-09-12 | 2019-09-12 | Modular connecting node for large triangular composite material pipe truss |
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| CN201910864614.7A CN110671399B (en) | 2019-09-12 | 2019-09-12 | Modular connecting node for large triangular composite material pipe truss |
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| CH718028B1 (en) * | 2020-11-02 | 2023-06-30 | Projets Et Realisations Sarl | Aircraft fuselage configured to provide passengers with a fully panoramic view of the exterior. |
| CN112722232B (en) * | 2020-12-14 | 2022-04-26 | 西安康本材料有限公司 | Triangular-section arc-shaped composite material truss and preparation method thereof |
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| GB176432A (en) * | 1920-10-30 | 1922-02-28 | Armstrong Siddeley Motors Ltd | Improvements in means for securing metal tubes in sockets |
| CN100586641C (en) * | 2008-12-02 | 2010-02-03 | 北京航空航天大学 | Preparation method of rectangular pyramid metal lattice material |
| CN101435228A (en) * | 2008-12-19 | 2009-05-20 | 中国建筑设计研究院 | Composite K type node of steel tube component space |
| CN202969401U (en) * | 2012-11-09 | 2013-06-05 | 大连船舶重工集团有限公司 | Truss self-lifting platform pile leg |
| ES2952399T3 (en) * | 2013-02-01 | 2023-10-31 | Seccional Brasil SA | lattice tower |
| CN103669593B (en) * | 2013-12-17 | 2015-12-16 | 南京工业大学 | Steel pipe flange valve snail bolt female connection structure |
| CN204185825U (en) * | 2014-09-28 | 2015-03-04 | 常州慧运复合材料有限公司 | Bridge pier composite material cofferdam guard system |
| CN204185800U (en) * | 2014-09-28 | 2015-03-04 | 常州慧运复合材料有限公司 | Composite material bridge protector |
| CN105568897B (en) * | 2015-12-14 | 2017-08-11 | 山西大学 | A kind of highway Composite Sandwich anticollision barrier |
| CN110040234B (en) * | 2019-04-08 | 2022-05-27 | 上海交通大学 | Large-scale stiffening ring splicing type triangular truss |
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