Units

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Sample subject outline - Semester 1 2013

Note: Subject outlines often change before the semester begins. Below is a sample outline.

Rationale

This unit uses the principles taught in ENB211 Dynamics in the kinematic and kinetic synthesis and analysis of machine components. As a mechanical engineer, when creating a machine component (such as gears) capable of generating a required motion, you must be able to predict the absolute and relative motion, velocities, accelerations and forces which evolve from creating a machine component such as gears, capable of generating a required motion, Knowledge of these dynamic responses will lead to further design of a complete machine system to perform a prescribed task and to alleviate resultant vibration and noise outputs which can be detrimental. This third year unit is an essential foundation for advanced machine design, final year project work and second major in Heavy Mechanical Engineering.

Aims

The aims of this unit are to develop (a) basic understanding of theory in mechanics of machinery, (b) analytical and computing skills in formulating and solving machine design problems (c) basic knowledge in mechanical vibrations including multi-degree-freedom systems, free and forced vibration and discrete analysis techniques and (d) sufficient background in the application of knowledge for the later part of the course in project work and instrumentation.

Objectives

At the end of this unit, you should be able to:
1.Extend the fundamental principles of kinematics and kinetics in formulating and solving problems in machine elements.
2.Apply analytical techniques and numerical computer packages to solve problems in machine components.
3.Solve multiple degrees of freedom vibration problems using equations of motion and discrete methods.

Content

Module 1: Rigid body planar mechanisms: linkages, gears and cams
·synthesis
·analysis of position, velocity acceleration, force
·balancing
·engine dynamics

Module 2: Vibrations
·single and multi-degree of freedom systems
·free and forced periodic vibration
·damped forced vibration
·standard force and energy methods for determining eigen-values and eigen- vectors
·discrete and finite element methods
·vibration control.

Approaches to Teaching and Learning

Teaching Mode: Hours per week: 4
Lecture: 2 hours
Tutorial/computer lab:1 hour
Pracs/computer lab:1 hour

The unit will be conducted by means of conventional lecture, tutorial and examples of real world problems. It will consist of one 2-hour block lecture, one hour tutorial and one hour of practical laboratory or design project session per week. The formal lecture and tutorial will be supplemented with real world examples and application software, such at MATLAB. The practical session enhances the theoretical knowledge learned in class through to participate in the analytical program. The lecture will be conducted with references to fundamental basic concepts and relevant 'real-life' engineering problems, interactive tutorials with provision for individual and team work participation and emphasis on learning by formulating and solving problems. Team participation in assignments will form part of the learning process and feedback will be provided to improve your understanding and application of the unit.

Assessment

General assessment will include formative (unmarked) tasks including short quizzes, and problem solving tasks to develop conceptual as well as practical skills. Formal assessment includes two written problem solving tasks (selected by lecturer?) from the weekly tasks, a mechanism design project (built and written report) or practical laboratory experiment (analysis of results and written report) and a final written examinationYou will receive feedback throughout the semester through team and tutor discussion in and outside class. You will also receive feedback on your problem solving capability in tutorials and laboratory results in lab classes.

Assessment name: Project (applied)
Description: Design a 4-bar mechanism to perform a prescribed task, such as moving an object from one position to another with a set of constraints.
Relates to objectives: 1,2
Weight: 25%
Internal or external: Internal
Group or individual: Group
Due date: Week 7

Assessment name: Problem Solving Task
Description: You will be assigned with a list of tutorial problems each week and will need to use problem solving skills to answer all the assigned problems. In addition to this you will be required to submit 2 to 4 answered questions (hand written) selected by the lecturer from the list of assigned questions throughout the semester. Your ability to apply the knowledge gained in class will be also assessed through 2 vibration practicals and written reports.

The vibration practicals and reports due 2 weeks after the lab classes. The due date for problem solving assignment is Week 13.
Relates to objectives: 1,2,3
Weight: 25%
Internal or external: Internal
Group or individual: Individual
Due date: Weeks 2 & 13

Assessment name: Examination (written)
Description: You will explain concepts and apply appropriate problem solving techniques related to machine dynamics
Relates to objectives: 1,2,3
Weight: 50%
Internal or external: Internal
Group or individual: Individual
Due date: Exam Period

Academic Honesty

QUT is committed to maintaining high academic standards to protect the value of its qualifications. To assist you in assuring the academic integrity of your assessment you are encouraged to make use of the support materials and services available to help you consider and check your assessment items. Important information about the university's approach to academic integrity of assessment is on your unit Blackboard site.

A breach of academic integrity is regarded as Student Misconduct and can lead to the imposition of penalties.

Resource materials

QUT T&L website, Blackboard through ENB312 - Lecture notes and Powerpoints.
References:
Norton (2004), Design of Machinery, McGraw Hill
S S Rao (2004), Mechanical Vibrations, Prentice hall
RF Steidel (1989), An introduction to Mechanical Vibrations, Wiley
SG Kelly (2000), Fundamentals of Mechanical Vibrations, McGraw Hill

Risk assessment statement

You will undertake lectures and/or tutorials in the traditional classrooms and lecture theatres. As such, there are no extraordinary workplace health and safety issues associated with these components of the unit. You may be required to undertake lecturer-led individual site visits. You will be given a safety induction course is provided by the school in the first week of the first semester.

You will be required to undertake computer simulation sessions in the computer laboratory under the supervision of staff of the School. The School's occupational health and safety policies and procedures will apply to these sessions. In any laboratory practicals you will be advised of requirements of safe and responsible behaviour. If you do not follow legitimate instructions or endanger the safety of others or do not act in accordance with the requirements of the Workplace Health and Safety Act you will be required to leave the session.

Disclaimer - Offer of some units is subject to viability, and information in these Unit Outlines is subject to change prior to commencement of semester.

Last modified: 22-Oct-2012