# DYNM08006 2019 Engineering Dynamics

### General Details

Full Title
Engineering Dynamics
Transcript Title
Engineering Dynamics
Code
DYNM08006
Attendance
N/A %
Subject Area
DYNM - Dynamics
Department
MEMA - Mech and Manufact Eng
Level
08 - NFQ Level 8
Credit
05 - 05 Credits
Duration
Semester
Fee
Start Term
2019 - Full Academic Year 2019-20
End Term
9999 - The End of Time
Author(s)
Molua Donohoe, Sean Dalton, Declan Sheridan
Programme Membership
SG_EMECH_H08 201900 Bachelor of Engineering (Honours) in Mechanical Engineering
Description

This module builds on the material used in 1st year Engineering Physics and Mechanics, and looks at when things are in motion.

The student will learn from theory classes backed up by practical examples in the laboratory.

This subject is designed to give the student key fundamentals to improve their understanding of what happens to mechanisms in motion.

### Learning Outcomes

On completion of this module the learner will/should be able to;

1.

Demonstrate an understanding of the relationships between displacement, velocity and acceleration applied to linear and rotational systems.

2.

Analyse problems involving conservation of momentum and conservation of energy.

3.

Apply graphical methods to analyse mechanisms.

4.

Analyse rotational systems, and recognise the importance of balancing rotating machinery and solve balancing problems

5.

Analyse the motion and forces within a variety of vibrating systems.

6.

Determine the torque for accelerating gear trains.

### Teaching and Learning Strategies

This module will be taught with theory classes backed up by practical laboratory experiments.

The students will learn from doing and the theory behind it to gain a fuller understanding of the topics being covered.

### Module Assessment Strategies

Reports will be written for the laboratory experiments where the students will have to make sound conclusions based on their experimental results. This will account for 30% of the module marks.

The other 70% will be based on a terminal exam.

### Repeat Assessments

Students who do not achieve a pass mark will have to repeat any failed element, but if they have achieved 40% in ant element, they wil not have to repeat that element.

### Indicative Syllabus

1.      General kinematics: differential relationships, variable acceleration, projectile motion with air resistance.

2.      Rotational system: torque and angular acceleration, moment of inertia for standard shapes and composite shapes, parallel and perpendicular axis theorems, kinetic energy due to rotation, drum/mass system, simultaneous rotation and translation.

3.      Energy Methods: work, energy, conservation of energy.

4.      Mechanisms: mechanism examples, relative motion, velocity and acceleration diagrams, torque, power.

5.      Vibrations: simple harmonic motion: free vibration; spring/mass system, pendulum, rotational system, stiffnesses in series and parallel: damped free vibration; logarithmic decrement: undamped forced vibration; harmonic force applied to mass, harmonic displacement applied to support: damped forced vibrations; transverse vibrations.

6.      Dynamic balancing: masses in single plane, masses in several transverse planes, reciprocating mass, slider/crank mechanism, accelerometer.

7.      Gear trains: torque required for acceleration of gear train, optimum gear ratio, epicyclic gears.

8.      Gyroscopic motion: angular momentum, gyroscopic torque, reactions at bearings.

9.      Computer software: Modelling with working model and excel, (for example, projectile motion, mechanisms, vibrations).

### Coursework & Assessment Breakdown

Coursework & Continuous Assessment
30 %
End of Semester / Year Formal Exam
70 %

### Coursework Assessment

Title Type Form Percent Week Learning Outcomes Assessed
1 Laboratory reports Continuous Assessment Assignment 30 % OnGoing 1,2,3,4,5,6

### End of Semester / Year Assessment

Title Type Form Percent Week Learning Outcomes Assessed
1 Final exam Final Exam Closed Book Exam 70 % End of Semester 1,2,3,4,5,6

Type Location Description Hours Frequency Avg Workload
Lecture Flat Classroom Theory class 2 Weekly 2.00
Laboratory Practical Engineering Laboratory Dynamics labs 2 Fortnightly 1.00
Independent Learning Not Specified Reading and report writing 3 Weekly 3.00
Total Full Time Average Weekly Learner Contact Time 3.00 Hours