Course detail

Aircraft Structure II

Introduction to FEM theory, mathematical flexibility. Variational principles, Lagrange variational principle. Ritz method. Basic elements, isoparametric formulation. Beam elements and plates, non-linearity, dynamic problems. Fundamentals of FEM simulation for aerospace structures. Exercise of FEM in MSC NASTRAN.

Learning outcomes of the course unit

Students will be able to calculate the stress, deformation and the strength of aircraft structure with the help of software systems “STRENGTH” and systems PATRAN, NASTRAN, ANSYS.

Prerequisites

The basic knowledge of mathematics, mechanics, structure and strength.

Co-requisites

Not applicable.

Recommended optional programme components

Not applicable.

Rivelo,R.M Theory and Analysis of Flight Structures
Obrazcov,I.F: Metod konecnych elementov v zadacach stroitelnoj mechaniky letatelnych apparatov., 1985
Bittnar,Z,Sejnoha,J.:: Numerické metody mech., , 0
Braner,J.R.: Finite Element Analysis, , 0
Pistek a kol. : Pevnost a životnost. Skripta VUT, 1987.
Kolář, a kol.: FEM principy a praxe MKP, , 0
Braner,J.R.: Finite Element Analysis, , 0

Planned learning activities and teaching methods

The course is taught through lectures explaining the basic principles and theory of the discipline. Exercises are focused on practical topics presented in lectures.

Assesment methods and criteria linked to learning outcomes

Conditions for the course-unit credit award: participation in lessons (80% at least), presentation of the report elaboration from laboratory exercises. The exam has written (theoretical part and practical exercises) and oral parts.

Language of instruction

Czech

Work placements

Not applicable.

Aims

The goal is to explain the theory of deplanation and strength of aircraft structures. Students will be familiarized with special programs for tension calculations and strength of aircraft structures. They will learn the basis of FEM and its application on aircraft structure. Students will acquire knowledge of work with FEM, NASTRAN, ANSYS, and PATRAN.

Specification of controlled education, way of implementation and compensation for absences

Both lectures and exercises are compulsory, and the attendance (80% at least) is checked and recorded. The absence (in justifiable cases) can be compensated by personal consultation with the lecturer and elaboration of individually assigned topics and exercises. Individual tasks must be finished and handed in the week course-unit credits are awarded at the latest.

Classification of course in study plans

• Programme M2I-P Master's

branch M-STL , 1. year of study, summer semester, 5 credits, compulsory

Type of course unit

Lecture

13 hours, optionally

Teacher / Lecturer

Syllabus

1. Review of the FEM theory and linear theoty of elasticity
2. Variational principle, Lagrange variational principle, Rit´z method
3. Stiffness matrix of basic elements , Hierarchy of elements
4. Beems and plates elements
5. Assembly of final stiffness matrix
6. Methodology of simulation FEM on aircraft structures
7. Vibration and Dynamic problems ba FEM
8. Material and geometry nonlinearities
9. Fluid problems in FEM
10. The practical exercises on computer

Exercise

14 hours, compulsory

Teacher / Lecturer

Syllabus

1. Introduction to UNOSNOST software application.
2. Example of stress analysis using UNOSNOST software application.
3. Example of stress analysis using UNOSNOST software application.
4. Example of stress analysis using reduction coefficients method.
5. Calculation of loads on riveted, bounded and bolt joints.
6. Example of stress analysis of a wooden structure.
7. Composite structure – design and analysis.

Computer-assisted exercise

12 hours, compulsory

Teacher / Lecturer

Syllabus

1. Introduction to MSC. PATRAN/NASTRAN/ANSYS.
2. Stress analysis of selected structural element (NASTRAN, PATRAN, ANSYS).
3. Stress analysis of selected structural element (NASTRAN, PATRAN, ANSYS).
4. Stress analysis of selected structural element (NASTRAN, PATRAN, ANSYS).
5. Stress analysis of selected structural element (NASTRAN, PATRAN, ANSYS).
6. Stress analysis of selected structural element (NASTRAN, PATRAN, ANSYS).

eLearning