Engineering Dynamics II

Dr. Sherif Araby Gouda

Nazarbayev University
School of Engineering and Digital Sciences
Mechanical and Aerospace Engineering Department
 Teaching team

Course Coordinator :
Ass. Prof. Sherif Araby Gouda
Contact details:
Email: Sherif.Gouda@nu.edu.kz
Office: Online via Zoom
Teaching Assistant:
Mr. Dulat Karim
Email: Dulat.Karim@nu.edu.kz

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 Intended Learning
outcomes
- Determine unbalanced or shaking forces in machinery and control
undesired vibrations of machines via balancing the rotary forces

- Analyse geared systems

- Determine the position, velocity and acceleration (kinematic parameters) of

a machine/mechanism

- Analyse the dynamic behaviour of machines/ mechanisms

- Develop the ability to mathematically model and analyze engineering

systems

- Provide a foundation for mechanical engineering curriculum and potential

professions
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 Lectures

- All lectures will be delivered via Online-teaching

mode. There are two lectures per week:

1-Tuesdays 9:00 to 10:50 am

2- Thursdays 9:00 to 10:50 am

- Tutorials on Wednesdays at 15:00 ̶ 15:50

- Practical will start in week 2 onwards

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 Learning sources

All course materials will be on Moodle

- Lecture slides will be posted on weekly

- Recording of both lectures and tutorials will be posted

- Selected questions on topics will be available

- Textbooks:
1- Norton, Robert L. Design of machinery: an introduction to the synthesis an
analysis of mechanisms and machines, McGraw – Hill (any edition)

2- Uicker J. J., Pennock Jr., G.R., and Shigley J.E. Theory of Machines and
Mechanisms, Oxford University Press, New York,
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 Grade distribution

❑Written final exam

❑Year work
- Midterm test
- Quizzes
- Practicals
- Assignments

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 Grade distribution

❑Final examination
• Weighting : 50%
• The test will cover topics of weeks 5–11*
• Time allowed: 3 hours +20 min for uploading answer scripts
• Number of questions: five (5)*
• Date: TBA by the university
• Mode: Online

* it is subjected to change according to point of view of the instructor

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 Grade distribution

❑Mid-term test
• Weighting : 20%
• The test will cover topics of weeks 1–5*.
• Time allowed is 2 hours +20 min for uploading answer
scripts
• Number of questions is four (4) *
• Date: Week 7
• Mode: Online

* it is subjected to change according to point of view of the instructor 8

 Grade distribution

❑Quizzes
• Weighting : 5%
• Number: 5 (1% for each quiz)
• Multi-choice questions
• On Moodle
• Time allowed: 20 min
• One attempt
• Open for 24 hours
• Dates: TBA
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 Grade distribution

❑Assignments
• Weighting: 10%
• Number: 2 (5% for each assignment)*
• Problem based assignments
• Group work (4–5 members)
• Time allowed: submission within 2 weeks,
• No extension: unless valid and proved excuse is provided
• Dates: due date will be announced on Moodle.

* it is subjected to change according to point of view of the instructor

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 Grade distribution

❑Lab experiments
• Weighting: 15%
• Number: 3 (5% for each practical)
• Online: Recorded and posted on Moodle; students watch it
on their own.
• Group work (4–5 members)- Same group of assignment
• Time allowed: Report submission within 1 week,
• No extension: unless valid and proved excuse is provided
• Dates: due date will be announced on Moodle.
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 Grade distribution

❑Lab experiment #1
❑Shaking forces and balancing theory
• Lab sheet will be posted and students need to carefully read
the experiment : instructions, tasks and report requirements
• Weighting: 5%
• Online: Recorded and posted on Moodle, Group work (4–5
members)
• Week 2
• Time allowed: Report submission in Week 3
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 Grade distribution

❑Lab experiment #2
❑Efficiency and power loss in geared systems
• Lab sheet will be posted and students need to carefully read
the experiment : instructions, tasks and report requirements
• Weighting: 5%
• Online: Recorded and posted on Moodle
• Group work (4–5 members)
• Week 4
• Time allowed: Report submission in Week 5
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 Grade distribution

❑Lab experiment #3
❑Vibration of SDOF (Spring Mass system)
• Lab sheet will be posted and students need to carefully read
the experiment : instructions, tasks and report requirements
• Weighting: 5%
• Online: Recorded and posted on Moodle
• Group work (4–5 members)
• Week 10
• Time allowed: Report submission in Week 11
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 Course outline
This course introduces the student to:

❑ Determine unbalanced or shaking forces in machinery and control undesired

vibrations of machines

❑ Basic terminologies of gears and their kinematics and kinetics

❑ Kinematic analysis of mechanical mechanisms (position, velocity and acceleration)

❑ Crank effort diagram and flywheel

❑ Analyse the dynamic behaviour of machines/ mechanisms (Single Degree and

multi-degree of freedom)

❑ Determine natural frequency of a mechanical system, damped frequency

❑ Comprehend the responses (distance, velocity and acceleration) of Single Degree

vibratory system 15
 Course contents
plan
- Balancing shaking forces due to rotating masses (one week)*

- Introduction to gears, gear theory, gear types, kinematics and

kinetics of gears (two weeks) *

- Mechanical mechanisms (planar): Position, velocity and

acceleration Analysis (3 weeks) *

- Crank effort Diagram and flywheels (one week) *

- Comprehensive Analysis of Mechanical vibration (4 weeks) *

- One week for Mid Term

- One week for Revision

* It is subjected to change according to the progress of the course 16

 Gradate attributes

• Instill the philosophy that real engineering design problems are open-ended and
multifaceted
• operates effectively with and upon a body of knowledge of sufficient depth to
begin professional practice
• is prepared for life-long learning in pursuit of personal development and
excellence in professional practice
• is an effective problem solver, capable of applying logical, critical, and creative
thinking to a range of problems
• can work both autonomously and collaboratively as a professional
• is committed to ethical action and social responsibility as a professional and
citizen
• communicates effectively in professional practice and as a member of the
community 17
 Student Responsibility

Academic integrity
• It is the foundation of university life and is a fundamental to the reputation of NU
• Academic integrity means a commitment by all staff and students to act with
honesty, trustworthiness, fairness, respect and responsibility in all academic
work.
• An important part of practising integrity in academic work is showing respect for
other people's ideas, and being honest about how they have contributed to your
work
• Using another person's work without proper acknowledgement is considered
Academic Misconduct, and the NU takes this very seriously.
• Demonstrating highest standards of academic integrity endows the trust and high
value to the degree earned from NU
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 Student Responsibility

Quality of work and report

This course is most classical and fundamental science in Mechanical Engineering
and a major foundation of invention of machines, without a fair knowledge of which
no one can claim to be a Mechanical Engineer. Therefore, it is important that
1- Act responsible towards the course; follow instructor slides, enrich knowledge by
reading from textbook, attempt all tutorial questions

2- Attend lectures, tutorials and practical where comprehensive coverage for the
topic along with in-depth analysis

3- Submit high quality work (exam scripts and reports) when requested. The
submitted work presents the seriousness of students regarding the course, In
addition to the content, marks will be deducted in case of submission poor quality
works; quality includes scanning quality, writing format, and clarity and readability
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 Grade system

Letter Percent
Grade description (where applicable)
Grade range
A 95-100 Excellent, exceeds the highest standards in the assignment or course.

A- 90-94.9 Excellent; meets the highest standards for the assignment or course.

B+ 85-89.9 Very good; meets high standards for the assignment or course.

B 80-84.9 Good; meets most of the standards for the assignment or course.

B- 75-79.9 More than adequate; shows some reasonable command of the material.

C+ 70-74.9 Acceptable; meets basic standards for the assignment or course.

C 65-69.9 Acceptable; meets some of the basic standards for the assignment or course.

C- 60-64.9 Acceptable, while falling short of meeting basic standards in several ways

D+ 55-59.9 Minimally acceptable; falling short of meeting many basic standards.

D 50-54.9 Minimally acceptable; lowest passing grade.

F 0-49.9 Failing, very poor performance

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