| Module Title |
Mechanics of Machines |
| Module Code |
MEC1014 (ITS: MM306) |
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Faculty |
Mechanical & Manufacturing Eng |
School |
Engineering & Computing |
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NFQ level |
8 |
Credit Rating |
5 |
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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
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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
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| Workload | Full time hours per semester | | Type | Hours | Description |
|---|
| 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 |
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| Section Breakdown | | CRN | 10212 | Part of Term | Semester 1 | | Coursework | 0% | Examination Weight | 0% | | Grade Scale | 40PASS | Pass Both Elements | Y | | Resit Category | RC1 | Best Mark | N | | Module Co-ordinator | Antony Kho | Module Teacher | Paul Young |
| | Section Breakdown | | CRN | 12081 | Part of Term | Semester 1 | | Coursework | 0% | Examination Weight | 0% | | Grade Scale | 50PASS | Pass Both Elements | Y | | Resit Category | RC1 | Best Mark | N | | Module Co-ordinator | Antony Kho | Module Teacher | |
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| Assessment Breakdown |
| Type | Description | % of total | Assessment Date |
|---|
| 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;
RC1: A resit is available for both* components of the module.
RC2: No resit is available for a 100% coursework module.
RC3: No resit is available for the coursework component where there is a coursework and summative examination element.
* ‘Both’ is used in the context of the module having a coursework/summative examination split; where the module is 100% coursework, there will also be a resit of the assessment
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Pre-requisite |
None
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Co-requisite |
None |
| Compatibles |
None |
| Incompatibles |
None |
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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
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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.
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Indicative Reading List
Books:
- 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, 982, 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
Articles:
None |
Other Resources
None |
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