Module: Mechanics of Machines

Module Specifications.

Current Academic Year 2024 - 2025

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Date posted: September 2024

Module Title	Mechanics of Machines
Module Code	MM306 (ITS) / MEC1014 (Banner)
Faculty	Engineering & Computing	School	Mechanical & Manufacturing Eng
Module Co-ordinator	Antony Kho
Module Teachers	Paul Young
NFQ level	8	Credit Rating	5
Pre-requisite	Not Available
Co-requisite	Not Available
Compatibles	Not Available
Incompatibles	Not Available

Coursework Only
Online Loop Quiz and Assignments similar to the semester work

Description

To build on Engineering Mechanics (Statics and Dynamics) by adding Power transmission: gears, belts, clutches. Balancing of shafts Gyroscopic motion Dynamics (vibration) of mechanical systems in free, forced and damped modes Measurement of properties of dynamic systems

Learning Outcomes

1. Analyse and design power transmissions using gears, clutches and belts.
2. Balance shafts statically and dynamically using vector calculus
3. Calculate the natural frequency, damped frequency of single degree of freedom systems
4. Design a vibration isolation system and calculate the response to input forces
5. Undertake laboratory practicals and report scientifically on them in reports and poster form
6. Simulate and evaluate the performance of Mechanical Designs using Solid Modelling

*Type*	*Hours*	*Description*
Workload	Full-time hours per semester
Laboratory	4	In the lab
Fieldwork	6	Reporting on Lab activity
Tutorial	30	Problem solving questions on Loop with both Formative and Summative Feedback
Lecture	20	Broadcast or recorded lecture material presenting the content of the module.
Assignment Completion	40	Development of simulation model, analytical review and reporting on the detailed contents and reasoning.
Independent Study	25	Reading of background materials, practice for quizzes
Total Workload: 125

All module information is indicative and subject to change. For further information,students are advised to refer to the University's Marks and Standards and Programme Specific Regulations at: http://www.dcu.ie/registry/examinations/index.shtml

Indicative Content and Learning Activities

Simple and Compound Gears
Direct power transmission, gear ratios, design, module, tooth profile.

Belt Drives
Analysis of interaction between belt and pulley to determine governing equation for slippage. Geometry of system, gear ration and maximum power transmission.

Clutches
Torque at slip analysis for uniform pressure and constant wear rate. Use of multi-plate clutches. Design for power transmission in a gear train.

Balancing of shafts
Vector analysis of static and dynamic balancing of rotating shafts

Gyroscopic motion
3-D kinetics, calculation the gyroscopic couple under precession of the spin axis.

Free Vibration of SDOF
Equations of motion, undamped, viscous damping, dry friction damping & hysteretic damping

Forced vibration of SDOF system
Sinusoidal Excitation on mass, excitation of base, harmonic excitation.

Assessment Breakdown
Continuous Assessment	100%	Examination Weight	0%

Type	Description	% of total	Assessment Date
Course Work Breakdown
Laboratory Portfolio	2 practical reports	20%	Other
Digital Project	Development of a SolidWorks simulation model showing operational dynamics of a practical rig, and an analytical report showing the connection to the theoretical calculation.	30%	Week 12
Loop Quiz	Tutorial Style Questions	25%	Every Second Week
Loop Quiz	Asynchronous Loop Quiz with posed problems requiring completion in a short time once started	25%	n/a

Reassessment Requirement Type
Resit arrangements are explained by the following categories: Resit category 1: A resit is available for both* components of the module. Resit category 2: No resit is available for a 100% continuous assessment module. Resit category 3: No resit is available for the continuous assessment component where there is a continuous assessment and examination element.
* ‘Both’ is used in the context of the module having a Continuous Assessment/Examination split; where the module is 100% continuous assessment, there will also be a resit of the assessment
This module is category 1

Indicative Reading List

C.F. Beards: 1995, Beards CF., Engineering Vibration Analysis with Application to Control Systems, Arnold, 034063183X
Peter R. N. Childs: 2018, Mechanical Design Engineering Handbook, Butterworth-Heinemann, 9780081023686
GH Ryder, MD Bennett: 1990, Mechanics of Machines, 2, Industrial Press, Inc., 083113030X
Daniel J. Inman: 0, Engineering vibration, Pearson, Upper Saddle River, N.J., 0132281732
J. Hannah, R. C. Stephens: 1984, Mechanics of machines, Edward Arnold, London, 0713134712

Other Resources

None