# AIRCRAFT STRUCTURES & AEROELASTICITY - 2018/9

Module code: ENG2096

Module Overview

Second year module for BEng and MEng aerospace engineering students.

A lecture and tutorial based module giving understanding of aircraft structures, aircraft aerodynamic loads and aeroelasticity. This builds on previous general modules on materials stress analysis and the module on aerodynamics and flight mechanics, providing the student with knowledge and understanding in each of these areas directly applicable to aircraft structures. It complements this knowledge with an introduction to fluid-structure interaction, presenting fundamental loads and aeroelastic effects that arise on aircraft structures.

Module provider

Mechanical Engineering Sciences

MARQUES S Dr (Mech Eng Sci)

Number of Credits: 15

ECTS Credits: 7.5

Framework: FHEQ Level 5

JACs code: H400

Module cap (Maximum number of students): N/A

Module Availability

Semester 2

Module content

Indicative content includes:

Aircraft Structures[15hrs]

Introduction to aircraft materials and structures
Stiffened shell idealisation: direct stress booms and shear stress skins
Bending in boom-idealised wing and fuselage sections
Shear in thin-walled beam sections
Shear in boom-idealised sections

Aerodynamic Loads and Aeroelasticity [18 hrs]

Review of single degree of freedom equation of motion
Introduction to generalised equations of motion for systems of multiple degrees of freedom; eigenvalue solution; aircraft mode shapes
Idealised aircraft structural dynamics models
Introduction to aerodynamic loads and the aeroelastic triangle
Wing load distributions and structural implications
Static aeroelasticity; divergence and control reversal
Gust response: sudden vertical and longitudinal gusts
Dynamic aeroelasticity: introduction to flutter

Assessment pattern

Assessment type Unit of assessment Weighting
Examination EXAMINATION (2 HOURS) 100

Alternative Assessment

N/A

Assessment Strategy

The assessment strategy is designed to provide students with the opportunity to demonstrate

they can describe aspects of typical aircraft structures and hence the rationale for their idealisation
they can analyse simplified aircraft structures through hand calculations
they can calculate shear flow distributions in thin-walled beam sections
they can describe the implications of fluid-structure interaction on aircraft analysis and design (final examination)
they can perform basic aerodynamic loads-related and aeroelastic hand calculations on simplified examples

Thus, the summative assessment for this module consists of:

Examination [Learning outcomes 1, 2, 3, 4]          (2 hours)        {100%}

Formative assessment and feedback

Formative assessment - practice exam style questions - peer marked
Formative verbal feedback is given in lectures (group) and tutorials (individual)
Written feedback is given on the coursework (individual)

Module aims

• an introduction to typical materials and features of (principally fixed-wing) aircraft structures and methods of stress analysis based on hand calculations
• an understanding of the interaction between aerodynamic loads and structural deformations, as well as an introduction to the most important aeroelastic effects on aircraft

Learning outcomes

Attributes Developed
001 Describe typical features of aircraft structures; (SM1b, SM1m, EA1b, EA1m, P4, P6) – K K
002 Calculate shear stresses / shear flow distributions in thin walled simplified (boom-idealised wing and fuselage structures / non-idealised beam sections ; (SM1b, SM1m, SM2b, SM2m, EA1b, EA1m, EA2, D3b, D3m, P4, P4m) KC
003 Recognise physical phenomena associated with aircraft structural dynamics; (SM1b, SM1m, SM2b, SM2m, EA1b,EA1m, EL4, P2, P2m P4, P4m) KC
004 Identify and define key concepts related to structural dynamics, such as natural frequencies, mode shapes, structural damping and vibration characteristics of a/c structures (SM1b, SM1m, SM2b, SM2m, EA1b, EA1m, EA2, D3b, D3m, P4, P4m) KC
005 Formulate the equation of motion for the dynamic analysis of multiple degrees of freedom systems. (SM1b, SM1m, SM2b, SM2m, EA1b, EA1m, EA2, D3b, D3m, P4, P4m) KC

Attributes Developed

C - Cognitive/analytical

K - Subject knowledge

T - Transferable skills

P - Professional/Practical skills

Independent Study Hours: 106

Lecture Hours: 33

Tutorial Hours: 11

Methods of Teaching / Learning

The learning and teaching strategy is designed to:

Introduce aircraft structures, materials and aeroelasticity principles through theory and worked examples. This is delivered through lectures and tutorial classes.

The learning and teaching methods include:

3 hours lecture per week x 11 weeks
1 hour tutorial (in groups) x 11 weeks

Indicated Lecture Hours (which may also include seminars, tutorials, workshops and other contact time) are approximate and may include in-class tests where one or more of these are an assessment on the module. In-class tests are scheduled/organised separately to taught content and will be published on to student personal timetables, where they apply to taken modules, as soon as they are finalised by central administration. This will usually be after the initial publication of the teaching timetable for the relevant semester.