Applications of Structural Optimization For Strength and Aeroelastic Design Requirements.

  • 0.84 MB
  • English
s.n , S.l
SeriesAGARD report -- 664
ContributionsLansing, W., Lerner, E., Taylor, R.F.
ID Numbers
Open LibraryOL21697321M

Turner, M. J.: Optimization of Structures to Satisfy Flutter Requirements, unnumbered report of Commercial Airplane Division, The Boeing Co., (to appear in AIAA J.).

Google Scholar by: Structural optimization is currently attracting considerable attention. Interest in - search in optimal design has grown in connection with the rapid development of aeronautical and space technologies, shipbuilding, and design of precision mach- by: In this optimization problem, parameters of beam cross section are chosen as the design variables to satisfy the displacement, flutter, and strength requirements.

An optimization procedure combining an automated finite element modelling (AFEM) technique with a ground structure approach (GSA) is proposed for structural layout and sizing design of. The purpose of this book is to introduce the fundamentals, methods and applications of structural optimization.

Much work has been done and many studies have been published on structural optimization in recent years. The book is an attempt to collect together selected topics of this literature and to present them in a unified approach.

It meets the need for an introductory text.

Details Applications of Structural Optimization For Strength and Aeroelastic Design Requirements. EPUB

Structural optimization, a broad interdisciplinary field, requires skillful combining of mathematical and mechanical knowledge with engineering. It is both intellectually attractive and technologically rewarding. The Symposium on Optimization in Structural Design was the second IUTAM Symposium in Poland.

The paper discusses current approaches for the use of computational fluid dynamics in aeroelastic analyses and structural design optimization applications.

Current methods for computational fluid dynamics-based static maneuver load analysis and flutter analysis are reviewed, including related issues such as fluid-structure interface, and moving Cited by: These three papers describe the his tory of and current work in structural optimization, particularly in the U.S., and discuss future applications.

Another excellent review, Haftka (), which has been presented but is as yet unpublished, considers structural optimization with aeroelastic design by: Aeroelasticity and Structural Optimization of Composite Helicopter Rotor Blades With Swept Tips K.

Yuan and P. Friedmann University of California • Los Angeles, California National Aeronautics and Space Administration Langley Research Center • Hampton, Virginia Prepared for Langley Research Center under Grant NAG May File Size: 9MB.

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Moreover, an aero-structural optimization of a wing is tackled aiming to minimize its total mass while fixing the lift coefficient.

Despite the many simplifications implemented in both the fluid and structural solvers, this framework proves to be useful to predict the aeroelastic performance of a wing Applications of Structural Optimization For Strength and Aeroelastic Design Requirements.

book the early stages of aircraft Size: 2MB. Design optimization of reinforced concrete structures determined, and a set of decision variable values constitutes a candidate solution.

An objective function, which is either maximized or minimized, expresses the goal, or performance criterion, in terms of the decision variables. The set of allowable solutions, and hence, the objective. Structural mechanics is the study of the mechanical behavior of solids and structures.

Aerospace structures differ from other structures due to their high demands for performance and lightweight. Modern aerospace structures typically require the use of composite materials, advanced multifunctional materials and thin-walled constructions.

With Mechanics of Optimal Structural Design, David Rees brings the original approach of weight optimization to the existing structural design literature, providing a methodology for attaining minimum weight of a range of structures under their working loads. He addresses the current gap in education between formal structural design teaching at Cited by: Practical Applications of Aeroelastic Analysis for Aircraft Design and Certification Aerospace Users Symposium Presented By: Robert Lind Requirements for Design and Certification structural components to establish the required strength level of.

Optimization in the Selection of Structural Systems for the achievement of those structures for the safety factors and design requirements in accordance with international codes. Reinforced concrete (RC) high-rise buildings designed to resist vertical loads in general, and checked in analysis and structural design models of RC high.

Applications of Structural Optimization in Architectural Design 20th Analysis and Computation Specialty Conference July Structural Optimization of. In this chapter, four main topics in composite blades of wind turbines including design, stress analysis, aeroelasticity, and fatigue are studied.

For static analysis, finite element method (FEM) is applied and the critical zone is extracted. Moreover, geometry, layup, and loading of the turbine blades made of laminated composites are calculated and by: 1. This chapter focuses on some of the most advances made in the field of stability, dynamic, and aeroelastic optimization of functionally graded composite structures.

Practical realistic optimization models using different strategies for measuring structural performance are presented and discussed. The selected design variables include the volume fractions of the composite Cited by: 1. Zalewski and Allen () showed possible applications of the methodology for truss design.

Several examples of application of Graphic Statics to structural design are also shown in Beghini et al. (, a, b). The information about the internal forces can be interpreted from the form and force diagrams as follows:File Size: KB. Some of the product design requirements for aircraft structural design are presented in Table The major structures and materials design interactions are shown diagrammatically in Figure Material selection is directly or indirectly defined by.

Improved aeroelastic design through structural optimization The strain energy density computations are realized in the parallel environment, what is a condition to solve larger problems. But the same question concerns mesh generation, especially if the mesh elements numberis the order of To.

Moving Aerospace Structural Design Practice to a Load and Similarly, the strength of a structural member is characterized and factored down to a design resistance depending on the characteristics of that member (such as a column vs.

a beam). In typical aerospace applications, the FOS are requirements based on whether the. an aero-structural optimization of a wing is tackled aiming to minimize its total mass while fixing the lift coefficient.

Despite the many simplifications implemented in both the fluid and structural solvers, this framework proves to be useful to predict the aeroelastic performance of a wing in the early stages of aircraft design.

The resulting design and its verification encompass the guiding system and the cabin, counterweight and drive components. In addition to static (strength) calculations, dynamic and vibration analyses are also carried out with the aid of FE methods.

The field of nonlinear FE calculations is also of central significance. This book offers an introduction to numerical optimization methods in structural design.

Employing a readily accessible and compact format, the book presents an overview of optimization methods, and equips readers to properly set. Optimization Methods in Structural Design Practice as are the special requirements which practical design processes impose.

Several design aid computer applications which use optimization methods are examined including simple structural element design, whole structure configuration and sizing for trusses and frames and some specialist.

This is combined with variables for aerodynamic shape, structural sizing, and control surfaces (number, size, location, and aeroelastic trimmed settings) and constraints on stiffness, strength, local skin panel buckling, static aeroelastic response (roll performance, pitch rate, trimmed angle of attack), and flutter by: In this work, a study to design a highly flexible flutter demonstrator for the development and testing of active flutter suppression is presented.

Based on the UAV mission, a bi-objective design optimization problem can be formulated. The aeroelastic UAV characteristic and imposed constraints, defined by operational aspects and the structural integrity are described by.

Description Applications of Structural Optimization For Strength and Aeroelastic Design Requirements. PDF

58th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. 9 - 13 January Grapevine, Texas. Topology and Structural Optimization • Wednesday, 11 January • hrs Robust Aeroelastic Design Optimization of Hypersonic Vehicle with Uncertainties in Aerodynamic Loads, Heat Flux, and Structure.

structural applications. -level optimization methods have a single optimizSingle er, while multi-level optimization methods have a distributed optimization process.

ollaborative C optimization and analytical target cascading are possible choices of multi-level. The least-weight analyses of basic structural elements ensure a spread of interest with many applications in mechanical, civil, aircraft and automobile engineering.

Consequently, this book fills the gap between the basic material taught at undergraduate level and other approaches to optimum design, for example computer simulations and the.trophic failure of the wings due to aeroelastic divergence caused by insufficient torsional stiffness.

Torsional divergence phenomena were a major factor in the predominance of the biplane design until the early s when “stressed skin” metallic structural configurations were introduced to provide adequate torsional stiffness for.topology design of 2D continuum structures are presented to demonstrate that the ITD algorithm is an efficient and reliable method to carry out the layout optimization of multi-material continuum structures.

1 INTRODUCTION In the past, the intuition and experience of designers played a key role in structural Size: 2MB.