Course detail

Aircraft Structure II

FSI-OLK-AAcad. year: 2020/2021

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.

Language of instruction

English

Number of ECTS credits

5

Guarantor

doc. Ing. Jaroslav Juračka, Ph.D.

Department

Institute of Aerospace Engineering (LÚ)

Offered to foreign students

Of all faculties

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.

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.

Course curriculum

Not applicable.

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.

Recommended optional programme components

Not applicable.

Prerequisites and corequisites

Not applicable.

Basic literature

Obrazcov,Saveljev,Okazanov:: MKE v zadačach stav.mech.LA, , 0
Braner,J.R.: Finite Element Analysis, , 0
Výpočet pl. a prost.konstr.: Výpočet pl. a prost.konstr., , 0

Recommended reading

Píštěk,A.a kol.: Pevnost a životnost I, , 0
Bittnar,Z,Sejnoha,J.:: Numerické metody mech., , 0
Kolář, a kol.: FEM principy a praxe MKP, , 0
Braner,J.R.: Finite Element Analysis, , 0

Type of course unit

 

Lecture

13 hours, optionally

Teacher / Lecturer

doc. Ing. Jaroslav Juračka, Ph.D.

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

doc. Ing. Jaroslav Juračka, Ph.D.

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

doc. Ing. Jaroslav Juračka, Ph.D.

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).