Aircraft Structure II (FSI-OLK-A)

Academic year 2020/2021

Supervisor:	doc. Ing. Jaroslav Juračka, Ph.D.
Supervising institute:	LÚ	all courses guaranted by this institute
Teaching language:	English
Aims of the course unit:
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.
Learning outcomes and competences:
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.
Course contents:
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.
Teaching methods and criteria:
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.
Controlled participation in lessons:
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.
Type of course unit:
Lecture	13 × 1 hrs.	optionally
Exercise	7 × 2 hrs.	compulsory
Computer-assisted exercise	6 × 2 hrs.	compulsory
Course curriculum:
Lecture	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	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	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).

Literature - fundamental:
1. Obrazcov,Saveljev,Okazanov:: MKE v zadačach stav.mech.LA, , 0
2. Braner,J.R.: Finite Element Analysis, , 0
3. Výpočet pl. a prost.konstr.: Výpočet pl. a prost.konstr., , 0
Literature - recommended:
1. Píštěk,A.a kol.: Pevnost a životnost I, , 0
2. Bittnar,Z,Sejnoha,J.:: Numerické metody mech., , 0
3. Kolář, a kol.: FEM principy a praxe MKP, , 0
4. Braner,J.R.: Finite Element Analysis, , 0