Thermalstructural design and optimization of engine exhaustwashed structures joshua d. Structural design procedure and main features concerning the optimization problems are discussed. Design optimizationstructural design optimization january 23, 2004. A hyperheuristic approach to aircraft structural design. An intermediate level design will require the consideration of multiple load cases, perhaps of o50 aerodynamic loads, each requiring a. Faah808331a, aviation maintenance technician handbookairframe. Design sensitivity and optimization are used when we seek to modify a design whose level of structural complexity exceeds our ability to make appropriate design changes. Some test numerical examples and aerostructural optimization of aircraft wings are considered. Ceas conference on multidisciplinary aircraft design and optimization, k. Topology optimization of an aircraft wing david walker1 david liu2 and alan jennings3 air force institute of technology, wrightpatterson afb, oh, 45433 topology optimization was conducted on a threedimensional wing body in order to enhance structural performance and reduce overall weight of the wing. Optimization of laminate composite aircraft structures.
Aerostructural optimization requires coupled sensitivities. Structural optimization methodology for rotating disks of. Abstract the landing gear system is one of the largest aircraft systems which. Design optimization design domain topology optimization shape optimization. Structural analysis and optimization of a composite fan blade. Topology optimization in aircraft and aerospace structures design. Armand in support of the preliminary evaluation of various engine technologies, a methodology has been developed for of. The structural design methodology, along with a previously derived. Flying wing, aeroelasticity, maneuver, gust and landing loads, structural optimization, structural condensation.
The aircraft design process is a loosely defined method used to balance many competing and demanding requirements to produce an aircraft that is strong, lightweight, economical and can carry an adequate payload while being sufficiently reliable to safely fly for the design life of the aircraft. Traditionally aircraft design is performed by teams. Aerostructural analysis and design optimization of. The second example is an application to a structural design optimization of a blended wing body aircraft fuselage structure. Written by an expert team who has collaborated over the past decade to develop the methods presented, the book discusses essential theories with clear guidelines. Related content energetic, structural, thermal and fatigue analysis of heavy duty process pumps a lipej, d mitrusevski and b zafosnik. Similar to, but more exacting than, the usual engineering design process, the technique is highly.
Multilevel optimization in aircraft structural design evaluation. Thermal structural design and optimization of engine exhaustwashed structures joshua d. In the following chapters, the three phases in the structural design of aircrafts are presented. The improvement of aerodynamic performance often brings an increase in structural weight, and the decrease in it usually. Ceas conference on multidisciplinary aircraft design and. Design optimization structural design optimization january 23, 2004. Optimization strategy aerodynamic and structural optimization problem is a typical moo problem in aircraft design, and the 2 disciplines are always in conflict. Structural layout design of blended wing body bwb aircraft in the preliminary design phase is a challenging optimization problem due to large numbers of design variables and various constraints. This example shows the full scope of the method by consideration of metal and composite designs in single, double and sandwich layout under multiple load and constraint conditions. Paper open access related content fatigue analysis and. Aircraft wing structural design optimization based on.
The design and analysis of composite structures for aircraft is not a standalone problem and cannot be performed without multidisciplinary considerations. This book offers an introduction to numerical optimization methods in structural design. Aircraft structural design, analysis, and optimization. Grandhi2 wright state university, dayton, oh, 45435 structures located aft of embedded engines on low observable aircraft, known as engine exhaustwashed structures eews, are exposed to a combined loading environment that. Fail safe structures have multiple load paths and if one part fails, other components will take over the load eg multiple attachment points for. Structural optimization of aircraft 55 the order of buckling modes can change between iterations. There are 18 fan blades in the metallic baseline design, each with a total mass excluding the hub of 101 lb. Paper open access related content fatigue analysis and design.
Add structural element sizes to the design variables. Introduction the complexity of aircraft design is due to increased interaction between the different individual disciplines determining the performance of the aircraft. In rapid sizing approaches the optimization is based on design curves obtained from. Structural optimization and design of a strutbraced wing. Structural design optimization of a tiltrotor aircraft. The baseline finite element model adopted for structural analysis and optimization of a composite design is a nasa fan blade sized for large aircraft engine, as shown in figure 1. Aircraft structural design and analysis research papers. To date, topology optimization has proven to be the most beneficial, yet most complex, structural optimization technique available to engineers and scientists.
Design, analysis and optimization of fuselage floor beam. Optimization methods in structural design alan rothwell. The seri8 wind turbine blade is a reference blade design and modified for better aerodynamic performance. Synthesis and design optimization of structural layouts. Aerostructural design optimization of composite wind turbine. Topology design methods for structural optimization provides engineers with a basic set of design tools for the development of 2d and 3d structures subjected to single and multiload cases and experiencing linear elastic conditions. It is focused on composite elements, as they provide a great potential. Some test numerical examples and aero structural optimization of aircraft wings are considered.
Employing a readily accessible and compact format, the book presents an overview of optimization methods, and equips readers to properly set up optimization problems and interpret the results. Topology design methods for structural optimization 1st. Structural optimization and design of a strutbraced wing aircraft amir h. Aircraft life monitoring there are 3 philosophical approaches to designing aircraft in order to ensure that they operate safely throughout their operational lives. View aircraft structural design and analysis research papers on academia. Aircraft structural analysis and design models in this example, the composite structural aircraft components being designed were a fuselage, a tail figure 2, and wings figure 3. The framework incorporates three methodologies, which have been developed with consideration of the design stage. Wing and fuselage structural optimization considering alternative material systems by jonathan lusk b. Pdf topology optimization in aircraft and aerospace.
Aerostructural optimization of the nasa common research model. Aerostructural design optimization of composite wind. Aerostructural analysis and design optimization of composite. What is surprising is that an extremely simple design task may easily surpass our decisionmaking abilities.
Reliability based aircraft structural design optimization with uncertainty about probability distributions. On the benefits of applying topology optimization to. The afem technique, based on catia vba scripting and pcl programming, is used to generate models automatically considering the arrangement of inner systems. Ambedkar institute of technology bangalore, india 2,3 assistant prof. The purpose of this research is to develop novel approach that combines modern topology optimization methods with twolevel sizing optimization technique for design of larger aircraft components such as wing, tail and fuselage. Thermalstructural design and optimization of engine. Design optimization structural design and analysis. Multilevel optimization in aircraft structural design.
Pdf optimization assisted structural design of a new. Landing gear conceptual design and structural optimization of a large blended wing body civil transport aircraft sunpeth cumnuantip. 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 aircraft wings. Fatigue analysis and design optimization of aircraft s central fuselage to cite this article. Structural optimization methodology for rotating disks of aircraft engines sasan c. The design process for new aircraft configurations is. Changes of the structural design are one of the essentials in the investigation and optimization of alternative and innovative aircraft concepts. Institute of aeroelasticity, german aerospace center. Conceptual design of a mediumsized joinedwing aircraft 17 december 2009 proceedings of the institution of mechanical engineers, part g.
From preliminary design optimization for weight savings and manufacturability to final faa certification, the software. The effect of large structural deformations and the coupling between aeroelasticity and flight dynamics is investigated in different aspects of the aircraft structural design process, including aeroelastic stability, loads, and flight dynamics and control. Twolevel design optimization of aircraft structures under. Find a design for a family of blended wing aircraft that will combine aerodynamics, structures, propulsion. The purpose of this paper is to survey recent advances of topology optimization techniques applied in aircraft and aerospace structures design. Topology optimization has become an effective tool for leastweight and performance design, especially in aeronautics and aerospace engineering. Naghshinehpour abstract a significant improvement can be achieved in the performance of transonic transport aircraft using multidisciplinary design optimization mdo by implementing trussbraced wing concepts in combination with other advanced technologies and novel. Design optimization massachusetts institute of technology. The cad model is built in such a way that during a design optimization study, it does not require the structure to be defined ahead by the designer, since not only the. Thermalstructural design and optimization of engine exhaust. An optimization framework dedicated to stiffened panel optimization stiffopt has been implemented and demonstrated on aircraft fuselage covers. Aircraft structural design, analysis, and optimization originally developed specifically for airframes, hypersizer software performs 80% of the analyses required right out of the box. Aviation maintenance technician handbook general pdf, 64. Structural analysis and optimization for spar beam of an.
In this thesis, a framework for the optimization of aircraft structures is proposed. In this paper the choice of an appropriate design is seen as an optimization problem and solved by the application of a multilevel optimization procedure based on detailed finite element models of. Design, structural optimization and loads assessment for a. The conceptual design of an aircraft is a challenging problem in which optimization can be of great importance to the quality of design generated. The involved disciplines, like aerodynamics, structure, loads analysis. Furthermore the structural optimization is not performed at the design conditions but is evaluated at o.
Abstract main aspects of integration of the energybased topology optimization methods together with twolevel design method for. Synthesis and design optimization of structural layouts for. Structural analysis and optimization for spar beam of an aircraft vishruth gowda 2p s1, chandan r, shivappa h a3 1 department of mechanical engineering, dr. Design, analysis and optimization of fuselage floor beam kotresh b1 dr. Structural analysis and optimization of a composite fan. Structural analysis and optimization for spar beam of an aircraft. Application of multidisciplinary design optimization on. Towards virtual aircraft design and testing based on high. Reexamined structural design procedures for very flexible. Geometric programming for aircraft design optimization warren hoburg and pieter abbeel y university of california, berkeley, berkeley, california, 94720 we propose formulating conceptualstage aircraft design problems as geometric programs gps, which are a. Geometric programming for aircraft design optimization.
Topology optimization in aircraft and aerospace structures. Significant weight reducing is achieved after the sizing optimization of the obtained structural layout. Apr 14, 2015 topology optimization has become an effective tool for leastweight and performance design, especially in aeronautics and aerospace engineering. Topology optimization in aircraft and aerospace structures design article pdf available in archives of computational methods in engineering april 2015 with 6,824 reads how we measure reads. In that approach, only the design of a simplified crosssectional configuration of a tiltrotor aircraft composite wing was investigated. Topology design methods for structural optimization 1st edition. The cad model is built in such a way that during a design optimization study, it does not require the structure to be defined ahead by the designer, since not only the position and size of each structural element, but also the number. Wing and fuselage structural optimization considering. Mass optimization of the structural design of an aircraft aims to produce an airframe of minimal mass whilst maintaining satisfactory strength under various loading conditions due to flight and ground manoeuvres. However, particularly in the aerospace industry, there exists little application to realworld design problems, including all the complexities required to ensure that the resulting design complies with the regulations.
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