1. Introduction to the Dynamic Identification and Structural Healthy Monitoring based on measurements of vibration signals.
2. General principles & specifications of Dynamic Identification and Structural Health Monitoring problems.
3. Non-parametric and parametric deterministic and stochastic models for the representation of the structural dynamics in time and frequency domain.
4. Methods for the identification of deterministic models.
5. Methods for the identification of stochastic models.
6. Non-parametric methods for Structural Health Monitoring based on measurements of vibration signals.
7. Parametric methods for Structural Health Monitoring based on measurements of vibration signals.
8. Structural Healthy Monitoring under varying operating conditions.
9. Advanced topics.
10. Experimental applications.

LEARNING OUTCOMES

The course is an established introduction in the advanced and modern topics of Dynamic Identification (DI) and Structural Health Monitoring (SHM) using measurements of vibration signals. With the successful completion of the course, the student will be in position to:

• Understand the problems with their specifications as well as the principles of the Dynamic Identification and Structural Health Monitoring based on measurements of vibration signals.
• Propose proper non-parametric and parametric deterministic and stochastic models for the dynamics representation of the investigated structure.
• Develop proper non-parametric and parametric deterministic and stochastic models using various estimation methods and measurements of vibration signals.
• Analyze the effectiveness and the accuracy of the estimated models.
• Comprehend the basic principles of non-parametric and parametric methods for Structural Health Monitoring which are based on vibration signals.
• Opt the most proper modern Structural Health Monitoring methods for tackling various types of relative problems.
• Analyze the effectiveness of Structural Health Monitoring methods using proper indices and diagrams.
• Evaluate the presence of potential varying operating conditions and propose methods for their proper tackling.
• Design and apply the above in practice using proper equipment and software (such as MATLAB/SIMULINK and R programming language).

Το άρθρο Dynamic Identification and Structural Health Monitoring εμφανίστηκε πρώτα στο MEAD.

The course is separated into 12 modules as listed below :

• Flight control mechanisms
• Engine control mechanisms
• Fuel subsystem
• Hydraulic subsystem
• Electric Power subsystem
• Pneumatic subsystem
• Air conditioning Subsystem
• Emergency subsystems
• Helicopter subsystems
• Special function subsystems
• Avionics

Design integration procedures for the aircraft subsystems

LEARNING OUTCOMES 

THE LEARNING OUTCOMES FOLLOWING A SUCCESFUL COMPLETION OF THE COURSE REQUIREMENTS WILL INVOLVE ::

• Knowledge: The students are introduced to the basic structure of a typical aircraft and its main subsystems. This is followed by an extensive discussion on the current technology and design aspects of each of these subsystems. At the completion of the course the student will be familiar with various versions of subsystems available on the market so that he will be able to pass judgement of their merits.
• Skills: The student will be able to select rationally among various alternatives in a future design project he will be associated with.
• Capabilities: As discussed above.

Το άρθρο Aircraft Systems εμφανίστηκε πρώτα στο MEAD.

1 Classification

2 Definitions and Fundamentals

3 Nozzle Theory and Thermodynamic Relations

4 Flight Performance

5 Chemical Rocket Propellant Performance Analysis

6 Liquid Propellant Rocket Engine Fundamentals, Liquid Propellants, Thrust Chambers, Combustion of Liquid Propellants

7 Turbopumps, Engine Design, Engine Controls, Calibration, Integration and Optimization

8 Solid Propellant Rocket Fundamentals,  Solid Propellants, Combustion of Solid Propellants, Solid Rocket Components and Motor Design

9 Hybrid Propellant Rockets

10 Selection of Rocket Propulsion Systems

11 Electric Propulsion

LEARNING OUTCOMES

The course aims to provide the introductory knowledge required in the rocket propulsion, the technology, the efficiencies and the rocket propulsion systems design.

It introduces the student to the basic principles, the physics and the design of propulsion systems for the space vehicles. Emphasis is given to the chemical (liquid and solid fuel) propulsion systems.

At the end of this course the student will know the different propulsion systems, their operating principles, their key applications, definitions of key terms and design parameters (thermodynamic, nozzles, flight performance, fuel), and make basic performance and design calculations of rocket systems as required for basic flight missions.

Το άρθρο Aerospace Propulsion Systems εμφανίστηκε πρώτα στο MEAD.

Introduction in Non Destructive Testing and Evaluation, Reliability of NDT techniques, short overview of the most popular techniques, Optical inspection, Liquid penetrant inspection, Magnetic particles inspection, Eddy current inspection, Ultrasonic testing and inspection (basic principles of wave propagation in bulk elastic media and plates, reflection, refraction, Snell’s law, equipment and hardware, testing protocols, current trends and advancements, laboratory exhibition)

Acoustic Emission (signal analysis, acousto-ultrasonics), Radiography.

LEARNING OUTCOMES

The goal of this module is to offer to the student of Mechanical Engineering & Aeronautics the basic principles on several techniques of Non Destructive Testing (NDT) for the discontinuities location and characterization in materials and structures. A series of lectures on the most popular NDT techniques are presented, their basic principles explained, the associated equipment and the findings in typical applications discussed. Emphasis is given on discontinuities/flaws detection in metallic as well as in composite materials.

Το άρθρο Non Destructive Inspection of materials and structures εμφανίστηκε πρώτα στο MEAD.

Stress analysis in laminated structural elements made of FRP composites, 3D elastic constants of a laminated structure, Thermal expansion coefficients, Failure of laminated plates (FPF loads, plate failure due to hygrothermal loading, ultimate failure of laminate structure LPF, degradation of mechanical properties−distributed failure, design criteria), General principles of composite structural reliability (ISO 2394), Selection of stacking sequence in laminated structures (empirical methods, use of FPF and LPF failure loci, principal-stress method), Fatigue design of laminated structural components (material characterization, determination of stress sequences, load cycle counting, constant life diagrams, fatigue strength criterion, damage accumulation law, life prediction under complex stress state and spectral loading), Joints design for composites (bolted and adhesive), Application example: Design methodology for horizontal−axis wind turbine rotor blades.

LEARNING OUTCOMES

By the end of this course the students will be able to:

1. Specify the layup of laminated structures and select appropriate composite materials for structural elements based on the loading and operational requirements
2. Analyze structures made of composite materials under extreme and dynamic loading, control elastic stability and modal response of laminated plates
3. Design structural elements made of composite materials and implementing finite element models

This knowledge is necessary for related Diploma Thesis projects. The learning outcomes of this course correspond to the descriptive index 8, according to the European Qualifications Framework.

Το άρθρο Design with Composite Materials εμφανίστηκε πρώτα στο MEAD.

• Presentation of the generalized theoretical framework for the numerical analysis of deformable solids and structures. Transition from the analytical equations of stress equilibrium to weak formulations of the equations of equilibrium and approximate methods of solutions. Methods of weighted residuals, trial functions, the concept of global and local approximation of displacements. Variational formulations of the equilibrium equations, the Galerkin method, the method of arbitrary (virtual) displacements.
• Expansion of the finite element methods to 3D problems of deformable solids. Basic families of volume finite elements and their shape functions
• Analysis of beam and frame structures. Finite elements of classical bending, the concept of C¹ contntinous shape functions and finite elements. Finite elements of bending with shear (Timoshenko beams). Frame elements.
• Simplified three-dimensional elements for the analysis of thin-wall structures and aeronautical structures. Membrane, Plate and Shell finite elements.
• Non-linear finite element structural analysis. Introduction to key types of structural nonlinearity, admissible variational forms of the equilibrium equations. Iterative methods of solution of the nonlinear system. Total and tangential stiffness matrices. Analysis of structures with material nonlinearity. Analysis of geometrically nonlinear structures. Structural instability and buckling. The problem of initial or linear buckling. Prediction of stable pre- and post-buckling response.
• The course is combined with laboratory seminars and exercises which include programing of finite element software, and linear and nonlinear FE structural analyses of plate/shell structures.

LEARNING OUTCOMES 

This an advanced course on the topics of finite element methods, computational structural mechanics and numerical structural analysis.  Upon completion of the course, the students are anticipated to:

• Attain advanced knowledge in the Method of Finite Elements, Numerical Structural Analysis and computational structural mechanics.
• Obtain experience and knowledge in the analysis of complex three dimensional (structures, with focus on the analysis of thin-wall 3D structures (frames, plates, shells)
• Obtain basic knowledge on the non-linear analysis of structures, iterative/incremental methods of solution, the cases of material nonlinearity, geometric nonlinearity and buckling analysis.
• Acquire skills and hands-on experience in the development, programming and evaluation of finite element software.
• Acquire skills and hand-on experience on the static analysis of complex structures in the linear and nonlinear regime.

Το άρθρο Finite Elements for Structural Analysis εμφανίστηκε πρώτα στο MEAD.