The PrandtlPlane Configuration: Overview on Possible Applications to Civil Aviation

Frediani, Aldo; Cipolla, Vittorio; Rizzo, Enzo

doi:10.1007/978-1-4614-2435-2_8

Cited by 56 publications

(30 citation statements)

References 11 publications

(15 reference statements)

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“…Joined Wings were also the subject of US 4, 5 and European 6, 7 patents. Many advantages are claimed compared to classical cantilevered configurations: [8][9][10][11][12] improved stiffness properties, high aerodynamic efficiency 13 and superior stability and control characteristics. In addition to these theoretically significant advantages, a diamond Joined Wing can enclose a large antenna and be used for high altitude surveillance.…”

Section: Introductionmentioning

confidence: 99%

“…20 Moreover, several PrandtlPlane-like Joined Wings were also proposed for example for the design of Unmanned Air Vehicles. 9 The design of Joined-Wing type of aircraft for civil transportation was also adopted in United States with the introduction of the concept of Strut-Braced Wings (SBW) 21,22 and Truss Braced Wings (TBW). 23 The growth of interest on Joined Wings led to both experimental 24,25 and theoretical [26][27][28] studies.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Nonlinear Analysis of PrandtlPlane Joined Wings. Part II: Effects of Anisotropy

Cavallaro¹,

Demasi²,

Passariello³

2012

53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference

13
3
41
1

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Structural geometrical nonlinearities strongly affect the response of PrandtlPlane Joined Wings: it has been shown that linear buckling evaluations are unreliable and only a fully nonlinear stability analysis can safely identify the unstable state. This work focuses on the understanding of the main physical mechanisms driving the wing system's response and the snap-buckling instability. Several counterintuitive effects typical of unconventional non-planar wing systems are discussed and explained. In particular, an appropriate design of the joint-to-wing connection may reduce the amount of bending moment transferred, and this is shown to dramatically improve the stability properties. It is also demonstrated that the lower-to-upper-wing stiffness ratio and the torsional-bending coupling, due to both the geometrical layout and anisotropy of the composite laminates, present a major impact on the nonlinear response. How the material anisotropy modifies the Snap Buckling Region and the response is also discussed. The findings of this work could provide useful indications to develop effective aeroelastic reduced order models tailored for airplanes experiencing important geometric nonlinearities such as PrandtlPlane aircraft, Truss-braced and Strut-Braced wings and sensorcrafts.

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Section: Introductionmentioning
confidence: 99%

Nonlinear Analysis of PrandtlPlane Joined Wings. Part II: Effects of Anisotropy
Cavallaro¹,
Demasi²,
Passariello³
2012
53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
13
3
41
1
View full text Add to dashboard Cite

show abstract

“…The main characteristics and the advantages of the PrandtlPlane configuration have been discussed in previous works ( [2], [3], [4], [5], [6], [7]) showing also the possible disadvantages and, in particular, flutter characteristics. The particular aspects to be faced in the case of a very large freighter regard the interaction between structures and Flight Mechanics and Controls.…”

Section: Figure 2 Example Of Prandtlplane Freightermentioning
confidence: 99%

Aerodynamic optimization of a large PrandtlPlane configuration
Cappelli¹,
Costa²,
Cipolla
³

et al. 2016
Aerotec. Missili Spaz.
8
0
6
0
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The purpose of this paper is to present design procedures and tools for the aerodynamic optimization of a large freighter aircraft with a PrandtlPlane configuration. Suitable optimization tools have been developed and are shortly described in the paper; sensitivity analyses for high speed flight conditions have been performed, and, also, low speed performances are evaluated to provide a complete preliminary design of the PrandtlPlane freighter.

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“…The joining of the wings, either as in the Boeing Sensor-Craft design of Fig. 1 or in the PrandtlPlane-like [2] concept (box wing) of Fig. 2, provides a significant increase in stiffness (closed system) as compared to single wing models and thus is typically proposed for long and slender wings.…”

Section: Introductionmentioning
confidence: 99%

Reduced Order Modeling for the Nonlinear Geometric Response of Some Joined Wings
Phlipot
¹
,
Wang
²
,
Mignolet³
et al. 2014
55th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference
14
0
12
0
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The focus of this investigation is on assessing the use of nonintrusive (i.e. developed directly from commercial finite element codes) nonlinear reduced order modeling techniques for the prediction of the strongly nonlinear response of joined wings, e.g. the snap-buckling they exhibit.A key component of the reduced order modeling is the selection of the basis to represent the response and this aspect will be extensively discussed leading to the formulation of new metrics for the assessment of the basis. The reduced order models constructed with bases satisfying these metrics performed well in capturing the strongly nonlinear events in comparison to the predictions of the finite element code from which they are derived.

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The PrandtlPlane Configuration: Overview on Possible Applications to Civil Aviation

Cited by 56 publications

References 11 publications

Nonlinear Analysis of PrandtlPlane Joined Wings. Part II: Effects of Anisotropy

Nonlinear Analysis of PrandtlPlane Joined Wings. Part II: Effects of Anisotropy

Aerodynamic optimization of a large PrandtlPlane configuration

Reduced Order Modeling for the Nonlinear Geometric Response of Some Joined Wings

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