Dissertation > Excellent graduate degree dissertation topics show

Forward-swept wing aircraft composite aeroelastic tailoring design analysis technique

Author: WangXu
Tutor: SunQin
School: Northwestern Polytechnical University
Course: Aircraft design
Keywords: aeroelasticity divergence speed composite laminates forward-swept wing structural optimization
CLC: V224
Type: Master's thesis
Year: 2007
Downloads: 389
Quote: 2
Read: Download Dissertation


Torsional divergence problem is an obstacle in the application of forward-swept wing aircraft, despite its many advantages in aerodynamic characteristics, such as high critical Mach number, low wave drag and no wingtip stalling. Isotropic metals are the most widely used materials in aircraft structure, which unavoidably leads to heavier structure weights in designing forward-swept wing aircraft. Fortunately, aircraft designers can improve the divergence speed of forward-swept wings aircraft by means of aeroelastic tailoring technique.Aeroelastic tailoring technique involves mechanics of composite materials, aeroelastic dynamics and optimization methods. In this thesis, the history and relative theories of aeroelastic problem are reviewed. The mechanism of torsional divergence and how aeroelastic tailoring technique solving torsional divergence is also illuminated. Meanwhile, the aeroelastic tailoring technology is applied to a forward-swept wing aircraft research project in this thesis.The anisotropic mechanical characteristics of composite materials are critical path to implement aeroelastic tailoring. The design parameters of composite laminated structure consist of ply thickness, stack sequence and orientation, modifying these design variables can control the aeroelastic characteristics of aircraft wings which is because of different properties of strength and stiffness of composite laminated structures, that is the coupling of bending and twisted stiffness. Some numerical analyses are provided in the thesis to demonstrate the contributions of aeroelastic tailoring to forward-swept wing aircrafts.The optimization of composite materials structure is usually difficult, because of too many design variables, complex constraints and highly nonlinear behaviors. One of effective method is parameterized design by properly selecting design values. ANSYS provides with a practical method to solve multi-parameters design problem based on finite element analysis technique. An efficient structure optimization program is designed using the APDL (Ansys Parameter Design Language) for the optimization of composite materials aircraft structures. Finally aeroelastic tailoring technique of composite laminate is applied to a forward-swept wing structure to improve divergence speed.

Related Dissertations

  1. Finite Element Analysis and Optimization Design of a Tractor Cab,S219.02
  2. The Structural Optimization and Marketing Strategy of Qilu Bank Online Banking Product,F832.2
  3. Uniform deformation laminate interlaminar stresses Numerical simulation and high-temperature creep behavior of 40Cr steel,TB33
  4. Study on Structural Dynamic of Large Turbine Blade of SMA Composite,TK83
  5. Mechanism of Anti-slide Pile and Its Structural Optimization,TU473.1
  6. Study for Building Modle of the Polishing Process of 5-DOF Parallel Robot and Its Path Planning,TP242
  7. Blade Aeroelasticity Analysis Based on Fluid Solid Coupling,V211.47
  8. Composite Material Forward-swept Wing Aeroelastic Tailoring Technical Analysis and Research,V211.47
  9. Structural Optimization Design of Drum Brake Based on ADAMS,U463.55
  10. Nonlinear Structural Dynamics Analysis and Optimization Design on Naval Gun Driver,TJ391
  11. Structural design optimization of prestressed anchor cable anti-slide pile,TU473.1
  12. Iterative uniform design optimization of variable thickness reticulated shell,TU399
  13. Structural Optimization Based on Body Stiffness and Deformation Analysis,U463.82
  14. Study on Optimization of Tax Collection and Mangement Model of China,F812.42
  15. Optimize the asset structure of foreign exchange reserves Empirical Analysis,F832.6
  16. The Research of Static and Dynamiccharacteristics of Double Buffering Load Sensor Large-flow Amplification Hydraulic Steering System,TH137
  17. Research on Cutter Head and Its Hydraulic Drive System of Shield Tunnelling Machine,U455.39
  18. Study on Passenger Transport Structure Analysis and Optimization of Regional Comprehesive Transportion,U11
  19. Based the HyperWorks on Semi-trailer Frame of Finite Element Analysis and Light-weight Research,U463.32
  20. Study on a Truss Structural Morphogenesis Technique in Restrictive Conditions of Displacement,TU323.4
  21. Research on Building Formwork of the New-Typed Wood-Plastic Composite,TU755.2

CLC: > Aviation, aerospace > Aviation > Aircraft Construction and Design > Airfoil
© 2012 www.DissertationTopic.Net  Mobile