P. Piperni - Academia.edu (original) (raw)

Papers by P. Piperni

Research paper thumbnail of Numerical investigation of non-hierarchical coordination for distributed multidisciplinary design optimization with fixed computational budget

Structural and Multidisciplinary Optimization, 2016

Research paper thumbnail of Optimisation of a Business Jet

This paper discusses the structural design methodology embedded in a Multidisciplinary Design Opt... more This paper discusses the structural design methodology embedded in a Multidisciplinary Design Optimization (MDO) of a complete aerodynamic representation of a business jet, including winglets, rear-mounted engines, and a T-tail configuration. Particular emphasis is placed on the development of the quasi-analytical structural design methodology, including the layout of the ribs, the design of the spar webs, spar-caps and the skin-stringer panels, and the computation of the wing structural properties and weight. The statement of the MDO problem is reviewed and the MDO methodology is applied to the optimization of an aircraft for a fixed range mission assuming a constant Maximum Take-Off Weight.

Research paper thumbnail of Challenges of Aircraft Design Integration

The design of a modern airplane brings together many disciplines: structures, aerodynamics, contr... more The design of a modern airplane brings together many disciplines: structures, aerodynamics, controls, systems, propulsion with complex interdependencies and many variables. Recent aircraft programs, such as Bombardier's Continental Jet program (Figure 1) use participants located around the world and selected for their cost, quality and delivery capability. These participants share the risk on the program and must therefore be fully implicated in the design. A big challenge is to provide information on current design configuration simultaneously to all disciplines and all participants in the appropriate format. Another challenge of multidisciplinary optimization is to bring together technologies and methodologies of various disciplines in a way that is both practical and inclusive of the expertise that must accompany these individual technologies. This paper discusses progress made to address these challenges, streamline the aircraft design process and implement multidisciplinary...

Research paper thumbnail of CFD Aerodynamic Design and Analysis at Bombardier Aerospace using Massively Parallel Computing

Research paper thumbnail of Application of KTRAN Transonic Small Disturbance Code to the Challenger Business Jet Configuration with Winglets

SAE Technical Paper Series, 1988

Research paper thumbnail of Optimization of a Business Jet

Research paper thumbnail of The Application of Multi-Disciplinary Optimization Technologies to the Design of a Business Jet

10th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, 2004

This paper contains an outline of an engineering approach to multi-disciplinary design optimizati... more This paper contains an outline of an engineering approach to multi-disciplinary design optimization and an application of it to a business jet. One of the most challenging issues in multi-disciplinary optimization is to bring together technologies and methodologies of various disciplines in ...

Research paper thumbnail of The Development of A Multi-Disciplinary Wing Design Method

SAE Technical Paper Series, 2003

Research paper thumbnail of An investigation of the effect of mechanical damping to alleviate wake-induced flutter of overhead power conductors

Journal of Fluids and Structures, 1988

Research paper thumbnail of Preliminary Aerostructural Optimization of a Large Business Jet

Journal of Aircraft, 2007

An overview of an industrial approach to the aero-structural optimization of a large business jet... more An overview of an industrial approach to the aero-structural optimization of a large business jet is presented herein. The optimization methodology is based on the integration of aerodynamic and structural analysis codes that combine computational, analytical, and semi-empirical methods, validated in an aircraft design environment. The aerodynamics sub-space is analyzed with a three-dimensional Transonic Small Disturbance code capable of predicting the drag of a complete, trimmed aircraft within engineering accuracy. The design of the wing structure is accomplished using a quasi-analytical method that defines the layout of the ribs and geometry of the spar webs, spar-caps and skin-stringer panels, and predicts the wing flexural properties and weight distribution. In addition, the prediction of operating economics as well as the integrated en route performance is coupled into the scheme by way of fractional change functional transformations. In order to illustrate the automated design system capabilities, the methodology is applied to the optimization of a large business jet comprising winglets, rear-mounted engines and a T-tail configuration. The aircraft-level design optimization goal in this instance is to minimize a cost function for a fixed range mission assuming a constant Maximum Take-Off Weight.

Research paper thumbnail of Development of a Multilevel Multidisciplinary-Optimization Capability for an Industrial Environment

AIAA Journal, 2013

An overview of the deployment of multidisciplinary-optimization technologies in an industrial env... more An overview of the deployment of multidisciplinary-optimization technologies in an industrial environment is presented herein. This capability is being developed in a multilevel framework in line with the aircraft design stages within the engineering organization. At every design stage, the appropriate problem formulation, level of detail, analysis tools, and optimization strategy are implemented to meet the design objectives within the design-cycle time frame. The multidisciplinary-optimization technologies are deployed incrementally as an evolution of existing engineering methods, with subject-matter experts contributing to the problem setup and validation of the framework. A description of the multilevel strategy and sample results are provided.

Research paper thumbnail of Development of a Transonic Euler Method for Complete Aircraft Configurations

Research paper thumbnail of Numerical investigation of non-hierarchical coordination for distributed multidisciplinary design optimization with fixed computational budget

Structural and Multidisciplinary Optimization, 2016

Research paper thumbnail of Optimisation of a Business Jet

This paper discusses the structural design methodology embedded in a Multidisciplinary Design Opt... more This paper discusses the structural design methodology embedded in a Multidisciplinary Design Optimization (MDO) of a complete aerodynamic representation of a business jet, including winglets, rear-mounted engines, and a T-tail configuration. Particular emphasis is placed on the development of the quasi-analytical structural design methodology, including the layout of the ribs, the design of the spar webs, spar-caps and the skin-stringer panels, and the computation of the wing structural properties and weight. The statement of the MDO problem is reviewed and the MDO methodology is applied to the optimization of an aircraft for a fixed range mission assuming a constant Maximum Take-Off Weight.

Research paper thumbnail of Challenges of Aircraft Design Integration

The design of a modern airplane brings together many disciplines: structures, aerodynamics, contr... more The design of a modern airplane brings together many disciplines: structures, aerodynamics, controls, systems, propulsion with complex interdependencies and many variables. Recent aircraft programs, such as Bombardier's Continental Jet program (Figure 1) use participants located around the world and selected for their cost, quality and delivery capability. These participants share the risk on the program and must therefore be fully implicated in the design. A big challenge is to provide information on current design configuration simultaneously to all disciplines and all participants in the appropriate format. Another challenge of multidisciplinary optimization is to bring together technologies and methodologies of various disciplines in a way that is both practical and inclusive of the expertise that must accompany these individual technologies. This paper discusses progress made to address these challenges, streamline the aircraft design process and implement multidisciplinary...

Research paper thumbnail of CFD Aerodynamic Design and Analysis at Bombardier Aerospace using Massively Parallel Computing

Research paper thumbnail of Application of KTRAN Transonic Small Disturbance Code to the Challenger Business Jet Configuration with Winglets

SAE Technical Paper Series, 1988

Research paper thumbnail of Optimization of a Business Jet

Research paper thumbnail of The Application of Multi-Disciplinary Optimization Technologies to the Design of a Business Jet

10th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, 2004

This paper contains an outline of an engineering approach to multi-disciplinary design optimizati... more This paper contains an outline of an engineering approach to multi-disciplinary design optimization and an application of it to a business jet. One of the most challenging issues in multi-disciplinary optimization is to bring together technologies and methodologies of various disciplines in ...

Research paper thumbnail of The Development of A Multi-Disciplinary Wing Design Method

SAE Technical Paper Series, 2003

Research paper thumbnail of An investigation of the effect of mechanical damping to alleviate wake-induced flutter of overhead power conductors

Journal of Fluids and Structures, 1988

Research paper thumbnail of Preliminary Aerostructural Optimization of a Large Business Jet

Journal of Aircraft, 2007

An overview of an industrial approach to the aero-structural optimization of a large business jet... more An overview of an industrial approach to the aero-structural optimization of a large business jet is presented herein. The optimization methodology is based on the integration of aerodynamic and structural analysis codes that combine computational, analytical, and semi-empirical methods, validated in an aircraft design environment. The aerodynamics sub-space is analyzed with a three-dimensional Transonic Small Disturbance code capable of predicting the drag of a complete, trimmed aircraft within engineering accuracy. The design of the wing structure is accomplished using a quasi-analytical method that defines the layout of the ribs and geometry of the spar webs, spar-caps and skin-stringer panels, and predicts the wing flexural properties and weight distribution. In addition, the prediction of operating economics as well as the integrated en route performance is coupled into the scheme by way of fractional change functional transformations. In order to illustrate the automated design system capabilities, the methodology is applied to the optimization of a large business jet comprising winglets, rear-mounted engines and a T-tail configuration. The aircraft-level design optimization goal in this instance is to minimize a cost function for a fixed range mission assuming a constant Maximum Take-Off Weight.

Research paper thumbnail of Development of a Multilevel Multidisciplinary-Optimization Capability for an Industrial Environment

AIAA Journal, 2013

An overview of the deployment of multidisciplinary-optimization technologies in an industrial env... more An overview of the deployment of multidisciplinary-optimization technologies in an industrial environment is presented herein. This capability is being developed in a multilevel framework in line with the aircraft design stages within the engineering organization. At every design stage, the appropriate problem formulation, level of detail, analysis tools, and optimization strategy are implemented to meet the design objectives within the design-cycle time frame. The multidisciplinary-optimization technologies are deployed incrementally as an evolution of existing engineering methods, with subject-matter experts contributing to the problem setup and validation of the framework. A description of the multilevel strategy and sample results are provided.

Research paper thumbnail of Development of a Transonic Euler Method for Complete Aircraft Configurations