EP1989378A1 - Pneumatic structural element - Google Patents
Pneumatic structural elementInfo
- Publication number
- EP1989378A1 EP1989378A1 EP06817782A EP06817782A EP1989378A1 EP 1989378 A1 EP1989378 A1 EP 1989378A1 EP 06817782 A EP06817782 A EP 06817782A EP 06817782 A EP06817782 A EP 06817782A EP 1989378 A1 EP1989378 A1 EP 1989378A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- web
- elements
- tension
- train
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000007906 compression Methods 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 10
- 238000009958 sewing Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000004026 adhesive bonding Methods 0.000 claims 1
- 230000006835 compression Effects 0.000 abstract description 12
- 239000004753 textile Substances 0.000 abstract description 4
- 238000005452 bending Methods 0.000 abstract description 2
- 238000010276 construction Methods 0.000 abstract description 2
- 238000007688 edging Methods 0.000 abstract 1
- 230000003068 static effect Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 229920002457 flexible plastic Polymers 0.000 description 1
- 244000144992 flock Species 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 239000002990 reinforced plastic Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H15/00—Tents or canopies, in general
- E04H15/20—Tents or canopies, in general inflatable, e.g. shaped, strengthened or supported by fluid pressure
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H15/00—Tents or canopies, in general
- E04H15/20—Tents or canopies, in general inflatable, e.g. shaped, strengthened or supported by fluid pressure
- E04H2015/202—Tents or canopies, in general inflatable, e.g. shaped, strengthened or supported by fluid pressure with inflatable panels, without inflatable tubular framework
- E04H2015/204—Tents or canopies, in general inflatable, e.g. shaped, strengthened or supported by fluid pressure with inflatable panels, without inflatable tubular framework made from contiguous inflatable tubes
Definitions
- the present invention relates to a pneumatic component according to the preamble of claim 1.
- the strong increased buckling stiffness of the tensile / compressive members loaded with compressive forces is due to the fact that a push rod inserted according to D2 can be regarded as a rod elastically bedded over its entire length, such a rod being embedded in virtual distributed elasticities, each having the spring stiffness k exhibit.
- the object of the present invention is to provide a pneumatic component with tension / compression elements and an elongated, gas-tight hollow body which can be shaped and expanded into arcuate and / or planar structures, with one opposite to the one From the prior art known pneumatic supports and components significantly increased buckling load F ⁇ .
- a pneumatic component with a hollow body which can be formed independently of the form of the tension / compression elements due to static conditions, in particular independently of the shape of the tension element.
- FIG. 1 shows a first embodiment of an inventive pneumatic component in plan view
- FIG. 2 shows the embodiment of FIG. 1 in longitudinal section BB
- FIG. 3 shows a cross section AA through the embodiment of FIG. 1 with the forces acting
- FIG. 5 shows a cross section through a first embodiment of a
- FIG. 6 shows a cross section through a second embodiment of a
- Fig. 7 shows a cross section through a third embodiment of a
- Fig. 9 is an isometric view of a planar design of pneumatic
- 11 is an isometric view of an aerodynamic wing profile
- FIG. 12 shows a plan view of a further exemplary embodiment of a pneumatic component
- Fig. 13 is an isometric view of a second embodiment of a planar
- Fig. 1 shows the inventive pneumatic component in a first embodiment in a plan view. It is formed from two elongated, for example, cigar-shaped gas-tight hollow bodies 1 with a casing 9 and two end caps 5, the hollow bodies 1 each having a straight center line L. Other forms of hollow bodies 1 are included in the description of FIG. 12.
- the sheath 9 consists of z.
- a textile-reinforced plastic film or flexible plastic-coated fabric For example, a textile-reinforced plastic film or flexible plastic-coated fabric.
- These hollow bodies 1 intersect one another - geometrically abstract - in a sectional area 2, as can be seen from FIG. 2, which represents a section BB through FIG. If the two hollow bodies 1 are filled with compressed gas, they assume the shape shown in section AA of FIG. 4 under the conditions described below.
- a line stress ⁇ builds up in their sheaths 9, which by
- R radius of the hollow body 1 [m] given is.
- a textile web 4 is inserted, on which the line stresses ⁇ of the two hollow bodies 1 are transmitted in the section line, as shown in FIG.
- Essential is the tensile strength of the web 4.
- a substantially same configuration, as shown in FIGS. 1 and 2, can of course be considered as a single hollow body, which is longitudinally constricted by the two interconnected train-pressure elements 3, and the web 4, whereby the same line voltage conditions occur, as described for Fig. 1 to 3.
- Fig. 4 casually admits both views.
- the two end caps 5 then go over into a single end cap 5.
- the absolute size of / is at the same pressure p and the same radius R depending on the intersection angle of the two cutting circles of the two hollow body.
- the web 4 is clamped in a tension-pressure element 3, which has the shape shown in Fig. 2.
- the tension-pressure element 3 adopts the part of this line force represented above by the vector addition and is thus prestressed in the direction indicated by the vector representation.
- the line force / thus describes the resultant of the shell on the Web applied forces, which are designated in Figure 3 with ⁇ . Since the radius along the component is generally not constant, the bias of the web also varies along the component.
- the elastic modulus of the web is determined by the material.
- the modulus of elasticity is in the range of 10 8 N / m 2 .
- a typical value for the internal pressure p is 10 4 N / m 2 (100 mbar).
- the compressed air is used to bias the flexible web, so that it can transmit tensile and compressive forces and optimally stabilizes the pressure member against buckling.
- the webs 4 complex three-dimensional pneumatic components such as a wing, which are much more sustainable by combining with the train-pressure elements 3 than conventional pneumatic structures.
- the tension-pressure element 3 is stabilized by the line stresses ⁇ in the shell 9.
- the web 4 extending through the component forms, together with the tension / compression elements 3, an under-tensioned carrier for a respective load acting on the carrier and directed against the undervoltage.
- the web 4 with the tension / compression elements 3 can be interpreted as a truss as follows:
- the element 30 fulfills the function of a top chord of the truss 50, and designed as zugbelastbares element 33 train / pressure element the Function of a lower belt.
- the truss 50 thus consists of web 4, pressure-resistant stiffening element 30 and zugbelastbarem stiffening element 33rd
- the symbolized by the arrow 40 load will usually be a distributed over the length of the element 30 load.
- the element 30 In the case of a likewise possible local load, the element 30 must be formed correspondingly rigid in order to prevent local buckling.
- the web 4 is biased by the internal pressure prevailing in the component to one of the line force / corresponding force. If the latter remains displaced under the line force / in the case of the distributed load, the displacement is small (and takes place in accordance with the E modulus of the still prestressed web 4). However, if this exceeds the line force /, the displacement is greater, with the risk that the truss 50 is exceeded.
- the truss 50 has symmetry, with the following ge, that the same conditions prevail when attacking a load 44:
- the stiffening element 33 is pressure-resistant and acts as a top flange of the truss 50; the stiffening element 30 is tensile and acts as the lower chord. Load capacity is therefore given from both sides (load 40 and load 44).
- the tensile element 33 which is capable of being subjected to tensile stress is designed exclusively for tensile load, eg. as a flexible tension member, as it represents a rope. Then the load capacity of the framework 50 is only one-sided, given here by the load 40. The necessary for the function of the framework 50, predetermined distance of the stiffening elements 30,33 (tension / compression members 3) is ensured by the internal pressure p, the flexible web 4 on the line force / operable z.Bsp. biased in the manner shown in Figure 4.
- This embodiment is characterized by low weight and, as mentioned, is suitable for one-sided load (load 40).
- the web 4 and the elements arranged on it are operatively connected to the sheath 9, i. connected so that forces can be transmitted and the compression-resistant stiffening element in the manner of a top chord can accommodate the corresponding (i.e., acting in the direction of the lower chord), acting on the component load.
- the load (40, 44) acting on the stiffening element 30, 33 acts directly on the element 30, 33 or is introduced into the element 30, 33 via the sheath 9 (FIG. 4). The latter would be conceivable if a roof in accordance with FIG.
- Pre-tension ensured. This results in addition to the above-mentioned mechanical strength of the elements 30,33 as a second boundary condition for the maximum load 40, the allowable deformation of the framework 50, which is given as long as the bias of the web 4 as such still exists. The latter is dependent on the internal pressure p.
- FIG. 2c Another preferred embodiment of the device according to the invention is shown in FIG. 2c.
- the figure shows a pneumatic component 100, which is formed by a web 110 to two cylindrical sections 101 and 102 in the manner of a Doppelzy- Linders.
- the sheath 103 (consisting of a flexible, gas-tight material) is operatively connected to a pressure-resistant element designed as a straight, pressure-resistant carrier 104, and via this to the web 110, in the manner as exemplified in FIGS 7 is shown.
- a pressure-resistant element designed as a straight, pressure-resistant carrier 104
- the internal pressure p biases the web 110 made of flexible material to the illustrated, rectangular, rectangular shape.
- a zugbelastbares flexible tension member, z.Bsp. a wire rope 113 which is fixed by means of connections 114 on the web 110 in an operative position.
- the links 114 may be formed as tabs passed through the web 110, or by any suitable, skilled manner. By this arrangement, it is possible to form the outer shape of the shell independently of the arrangement of the elements of the framework 120; the necessity of the spindle-like shape according to FIGS. 1 and 2 is eliminated.
- both the web 110 and the tensile strength of the reinforcing element 113 partially solid and partially flexible form, which z.Bsp. when pulling element 113 may serve for better determination on the web 110 or other purposes.
- any formation of the shell 103 may be provided.
- FIG. 2 d shows a further embodiment of the component according to the invention, the parts shown bearing the same reference symbols as in FIG. 2 c.
- the carrier 104 is arranged offset in the web 110 down and is no longer directly with the shell 103, but still operatively connected.
- the carrier 104 is arranged curved.
- the skilled person can freely determine the allowable curvature of the carrier 104, depending on the design case;
- the boundary condition is that the carrier 104 then remains over its entire length in the pressure zone of the truss (carrier 104, web 110 and tension element 113).
- the wearing characteristics of this embodiment are the same as those of the embodiment of Fig. 2c.
- FIG. 4 is a technical version of the illustration according to FIG. 3 in section AA according to FIG. 1.
- the tension-compression element 3 here consists, for example, of two C-profiles 8 screwed together.
- the shell 9 of the hollow body 1 is without interruption the C-profiles 8 pulled through and is secured to the outside of the train-pressure element 3 by a piping 10.
- the web 4 is inserted between the outer layers of the shell 9 and is clamped by the screw connection of the C-profile 8.
- Fig. 5 shows a section through the thus executed train-pressure element 3 in detail.
- a variant for the execution of the train-pressure element 3 is shown in cross section.
- the tension-pressure element 3 here has three grooves for Piping 10 on. In the upper two grooves, the shells 9 of the two hollow body 1 are inserted by means of piping 10, in the lower groove of the web 4th
- Fig. 7 is the cross-sectional view of another variant of the train-pressure element 3 with its attachment.
- the tension-pressure element 3 here has, for example, a rectangular cross-section, but can also be designed differently for optimizing the area moment of inertia. It is inserted into a pocket 11, which is connected to the shell 9 by welding or sewing and subsequent sealing.
- the train-pressure elements 3 are brought together in a node 14, as shown in Fig. 8.
- a node 14 can be designed in many ways and is known per se in structural engineering. Here it consists for example of a plate 13 which is screwed to the train-pressure elements 3, for example.
- the airtight completion of the sheath 9 can also be solved in many ways. The essential here is that the train-pressure elements 3 are led out of the shell 9 and the node 14 is exposed for proper attachment, for example, on a support.
- FIG. 9 is the isometric view of a planar design of a pneumatic component according to this invention.
- a plurality of train-pressure elements 3 is provided, wherein in each case a web 4 according to FIG. 2 is inserted.
- a hollow body 1 is clamped in each case and filled with compressed gas.
- An unpaired hollow body 1 adjoins the two extreme-lying tension-pressure elements 3 in order to generate the prestressing of the tension-pressure elements 3 and to laterally stabilize the tension-pressure elements 3.
- For the construction of such a sheet-like component can proceed so that all train-pressure elements 3 and the sheaths 9 of the hollow body 1 are already mounted and the whole arrangement described on support 15 is placed and then filled with compressed gas. Or the assembly can be done on site by the train-pressure elements 3 attached to the supports and the sheaths 9 are then added to the train-pressure elements 3.
- the advantage of an embodiment as actual surface structure 16 according to FIG. 10 has the advantage that the individual tension-pressure elements 3 are preferably stabilized against tilting, and no moments need to be applied by a suitable support.
- Fig. 11 shows, starting from Fig. 10, a erfmdungsgemässes wing profile 17.
- two flocks of train-pressure elements 3 are arranged crossed here.
- the amounts of train-pressure elements 3 in the two shares - here two in one, eight in the other direction - can be adapted to the requirements of the wing profile 17.
- the formation of the contours of the train-pressure elements 3 is variable in the sense that in addition to the static requirements for such a profile and the aerodynamic shapes of inflow and outflow edges 18, 19 can be configured accordingly, this at best with profile attachments, which Although aerodynamically effective, but not part of the static of the airfoil 17 in terms of its properties as a surface structure.
- the center lines L of the hollow bodies 1 are not bent straight, as is the case in the exemplary embodiment according to FIG. 1, but from the sectional surface 2 of the two hollow bodies 1.
- the two hollow bodies 1 - which intersect each other here in the sectional area 2 according to FIG. 2 and which remain unchanged in their shape - thus have the smallest diameter in the cross section AA according to FIG. 1.
- this increases to the ends of the hollow bodies 1.
- This also increases the line voltage ⁇ proportional to the local radius R.
- the line force transmitted to the web 4 can be increased or, generally speaking, optimized. Instead of an increasing after the ends of the hollow body 1 local radius can of course be chosen a constant or a decreasing.
- FIG. 13 is an illustration of another embodiment of the inventive concept.
- a plurality-in FIG. 13 for example, five-of hollow bodies 1 are arranged on a further, smaller, multiplicity of tension-compression elements 3. These in turn carry webs 4 and are led out of the hollow bodies 1 gas-tight.
- the train-pressure elements can be chosen differently, both their length, their height and their direction.
- each a hollow body 1 is added, for symmetrizing the line voltages in said two outermost train-pressure elements 3 and their webs 4th and for their lateral stabilization.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Tents Or Canopies (AREA)
- Rod-Shaped Construction Members (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
- Actuator (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH02074/05A CH704442B1 (en) | 2005-12-23 | 2005-12-23 | Pneumatic component. |
PCT/CH2006/000732 WO2007071101A1 (en) | 2005-12-23 | 2006-12-22 | Pneumatic structural element |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1989378A1 true EP1989378A1 (en) | 2008-11-12 |
EP1989378B1 EP1989378B1 (en) | 2017-08-23 |
Family
ID=35841975
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06817782.3A Not-in-force EP1989378B1 (en) | 2005-12-23 | 2006-12-22 | Pneumatic structural element |
Country Status (7)
Country | Link |
---|---|
US (1) | US7836636B2 (en) |
EP (1) | EP1989378B1 (en) |
CN (1) | CN101389821B (en) |
CA (1) | CA2634505C (en) |
CH (1) | CH704442B1 (en) |
ES (1) | ES2647492T3 (en) |
WO (1) | WO2007071101A1 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1694931A1 (en) * | 2003-11-04 | 2006-08-30 | Prospective Concepts AG | Pneumatic two-dimensional structure |
CH705206B1 (en) * | 2006-06-23 | 2012-11-30 | Prospective Concepts Ag | Pneumatic support structure. |
WO2009065238A2 (en) * | 2007-11-19 | 2009-05-28 | Prospective Concepts Ag | Foldable pneumatic support |
CA2678232C (en) * | 2008-09-05 | 2016-03-08 | Dynamic Shelters Inc. | Method and apparatus for distributing a load about an air beam |
CH700461A2 (en) * | 2009-02-17 | 2010-08-31 | Empa | Crooked pneumatic carrier. |
CN102995747B (en) * | 2012-12-06 | 2015-05-13 | 北京工业大学 | Truss system with pneumatic membrane compression bar |
CH709686A2 (en) | 2014-05-22 | 2015-11-30 | Pibridge Ltd | Pneumatic support. |
US10400462B2 (en) * | 2016-05-04 | 2019-09-03 | Monolithic Constructors, Inc. | Transverse span airform structure |
CH713818A1 (en) * | 2017-05-16 | 2018-11-30 | Pibridge Ltd | Pneumatic carrier. |
PL432278A1 (en) * | 2019-12-18 | 2021-06-28 | Instytut Formy Spółka Z Ograniczoną Odpowiedzialnością | Multi-chamber construction element and method of producing thereof |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1557401A1 (en) * | 1967-03-15 | 1969-09-04 | Friedrich Rauch | Bending-resistant air tent wall or ceiling |
CH669008A5 (en) * | 1987-08-12 | 1989-02-15 | Emil Peter | ARCHED SURFACE STRUCTURE IN WOOD AND / OR STEEL. |
FR2621944A1 (en) * | 1987-10-15 | 1989-04-21 | Delamare Guy | INFLATABLE DOUBLE WALL WITH POLYLOBEE |
US6065252A (en) * | 1995-10-20 | 2000-05-23 | Norsen; Robert A. | Pneumatically convertible roof |
FR2761707B1 (en) * | 1997-04-02 | 1999-06-04 | Scebep Spironef | INFLATABLE, DEPLOYABLE AND RETRACTABLE |
JP3574743B2 (en) * | 1998-04-03 | 2004-10-06 | 帝人テクノプロダクツ株式会社 | Air film structure |
CN2361695Y (en) * | 1998-10-20 | 2000-02-02 | 王泽林 | Movable air-filled vault curtain building |
US6860220B2 (en) * | 2002-08-13 | 2005-03-01 | Zodiac Hurricane Technologies, Inc. | Watercraft and inflatable flooring therefor |
AU2004257321A1 (en) | 2003-07-18 | 2005-01-27 | Prospective Concepts Ag | Pneumatic support |
ATE383481T1 (en) | 2003-08-27 | 2008-01-15 | Prospective Concepts Ag | FLOATING SUPPORT STRUCTURE WITH STATIC BUOYANCY |
EP1694931A1 (en) * | 2003-11-04 | 2006-08-30 | Prospective Concepts AG | Pneumatic two-dimensional structure |
EP1903559A1 (en) | 2006-09-20 | 2008-03-26 | Deutsche Thomson-Brandt Gmbh | Method and device for transcoding audio signals |
-
2005
- 2005-12-23 CH CH02074/05A patent/CH704442B1/en not_active IP Right Cessation
-
2006
- 2006-12-22 EP EP06817782.3A patent/EP1989378B1/en not_active Not-in-force
- 2006-12-22 CN CN2006800533974A patent/CN101389821B/en not_active Expired - Fee Related
- 2006-12-22 WO PCT/CH2006/000732 patent/WO2007071101A1/en active Application Filing
- 2006-12-22 US US12/086,907 patent/US7836636B2/en not_active Expired - Fee Related
- 2006-12-22 ES ES06817782.3T patent/ES2647492T3/en active Active
- 2006-12-22 CA CA2634505A patent/CA2634505C/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2007071101A1 * |
Also Published As
Publication number | Publication date |
---|---|
US7836636B2 (en) | 2010-11-23 |
EP1989378B1 (en) | 2017-08-23 |
CA2634505A1 (en) | 2007-06-28 |
WO2007071101A1 (en) | 2007-06-28 |
CA2634505C (en) | 2015-12-15 |
ES2647492T3 (en) | 2017-12-21 |
US20090282746A1 (en) | 2009-11-19 |
CN101389821A (en) | 2009-03-18 |
CH704442B1 (en) | 2012-08-15 |
CN101389821B (en) | 2011-01-19 |
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