3. Project Reporting:
Project reporting means the
collection, processing and reporting of
project data.
The structure, frequency and
circulation of reports need to be
established during the start-up phase
of the project.
Following are the salient types
MECH300G
2/22/01 updated
MECH300G Special Topics in
Mechanical Vibrations
Dr. Yi-Kuen Lee
Assistant Professor
Department of Mechanical Engineering
Hong Kong University of Science and Technology
meyklee@ust.hk
http:/teaching.ust.hk/~mech300
1
Dr. Y.K. Lee
Dr. Y K Lee
MECH300G
Vibration 2-1
MECH300G
1
Dr. Y K Lee
MECH300G
Roots of Char. Eqn. of 1DOF (m,c,k)
system for on the s-plane
1,2 = n n 2 1
2
FIG. 2.25
Dr. Y K Lee
MECH300G
Damping ratios of common materials
3
Dr. Y K Lee
MECH300G
Another damping coeff
Dr. Y K Lee
MECH375
Vibration 2-3
MECH375
1
Dr. Y K Lee
MECH375
Roots of Char. Eqn. of 1DOF (m,c,k)
system for on the s-plane
1,2 = n n 2 1
2
FIG. 2.25
Dr. Y K Lee
MECH375
Damping ratios of common materials
3
Dr. Y K Lee
MECH375
Another damping coefficien
MECH375
Fundamentals of Vibration
MECH375G
1
Dr. Y K Lee
MECH375
Outline
Why vibration is important?
Definition; mass, spring (or stiffness)
dashpot
Newtons laws of motion, 2nd order ODE
Three types of vibration for SDOF sys.
Alternative way to find
Dr YK Lee
MECH300G
Vibration 4
Multiple DOF systems
1
Dr YK Lee
MECH300G
More then 2 Degrees of
Freedom
Extending previous section to any
number of degrees of freedom
Textbook: Chap 6
2
Dr YK Lee
MECH300G
Why MOF?
For simplicity continuous systems are
ap
Dr YK Lee
MECH375
Solution to MECH375 Final Exam
Fall 2009
Student Name:_
Student ID:_
Student Signature:_
Problem 1 (30 pts)
Assume a drilling machine as shown in the following figure be a 2-degree-of-freedom vibration system.
Assume l = 550mm, m1 = 2.78
Dr. Y.K.Lee
MECH375
Solution to MECH375 Midterm Exam
Fall 2009
Student Name:_
Student ID:_
Student Signature:_
Problem 1 (20 pts)
The arm AD if the excavator shown in the following figure can be approximated as a steel tube of outer
diameter 30 cm, inner
Dr. Y K Lee
MECH300G
Fundamentals of Vibration
MECH300G
1
Dr. Y K Lee
MECH300G
Outline
Why vibration is important?
Definition; mass, spring (or stiffness)
dashpot
Newtons laws of motion, 2nd order ODE
Three types of vibration for SDOF sys.
Alternativ
Dr. YK Lee
MECH375, Fall
09
MECH375 Homework #3
Due: Oct 5, 2009
Show your work. Don't just write down the final answer - be methodical and clear about the
entire sequence of steps you used to arrive at your answers.
0. Reading assignment: Textbook, Secti
Dr. Y.K. Lee
MECH300G
Vibration 3.0
Textbook: Sec 3.5~3.9, 3.11, 4.7
1
Dr. Y.K. Lee
2
MECH300G
Dr. Y.K. Lee
3
MECH300G
Dr. Y.K. Lee
MECH300G
/2
4
Dr. Y.K. Lee
5
MECH300G
Dr. Y.K. Lee
MECH300G
Resonance condition
6
Dr. Y.K. Lee
7
MECH300G
Dr. Y.K. Lee
8
ME
DEPARTMENT OF INDUSTRIAL ENGINEERING
Final Examination 7th Semester (Fall) 2014, Dated: 16-01-2015
IE-416 METAL FORMING AND CUTTING ANALYSIS
Time allowed: 3 hours
Max. Marks: 40
ASSUME MISSING DATA WITH JUSTIFICATION WHERE REQUIRED
NO CHOICE
QUESTION1 (6)
Metal Forming & Cutting Analysis (7th Semester)
Industrial Engineering Department
Mid Term Examination Fall 2014
NO CHOICE
Max Marks: 20
Time Allowed: 100 Minutes
Question1 (4)
A solid cylindrical specimen 100-mm high is compressed to a final height of 40
A HSS tool is used to turn a steel workpart that is 300 mm long and 80 mm in diameter. The
parameters in the Taylor equation are: n = 0.13 and C = 75 (m/min) for a feed of 0.4 mm/rev. The
operator and machine tool rate = $30.00/hr, and the tooling cost pe
Dr Yi-Kuen Lee
MECH300E, Spr 2003
CHAPTER 2 DAMPED FREE VIBRATION
Whenever a real body is set into vibration, dissipative (frictional) forces arises. These
forces are of many types, depending on particular vibrating system, but they will always
result in
Dr. Y.K. Lee
MECH300G
Vibration 3
2DOF and Multiple DOF systems
1
Dr. Y.K. Lee
MECH300G
Chapter 4 Multiple Degree of
Freedom Systems
Extending the first 3 chapters to
more then one degree of freedom
Raos textbook: Chap 5
2
Dr. Y.K. Lee
MECH300G
Two Degree
Dr Yi-Kuen Lee
MECH300E SPR 2003
Mechanical-electrical analogies
Mechanical systems can be studied through the use of their electrical analogs, which may be
more easily constructed than models of the corresponding mechanical system. Besides, it can
be hel
National Exams December 2013
07-Mec-BS Engineering Materials
3 Hours Duration
NOTES:
1. If doubts exist as to the interpretation of any question, the candidate is urged to submit
with the answer paper, a clear statement of any assumptions made.
2. Any non
University of Engineering and Technology, Taxila
Department of Mechanical Engineering
Phone: +92-51- 9047685
Fax: +92-51-9047690
E-mail: zahid.suleman@uettaxila.edu.pk
No.UETT/MED/2012/_
02-2012
Dated: 28-
The Principal,
POFIT,
POF , Wah Cantt.
Subject:
I
University of Engineering and Technology, Taxila
Department of Mechanical Engineering
Phone: +92-51- 9047685
Fax: +92-51-9047690
E-mail: zahid.suleman@uettaxila.edu.pk
No.UETT/MED/2012/_
_
Dated:
The Chief Human Resource,
Civil Aviation Authority Headquar
Control Engineering
Submitted By: Amer Mehmood
Submitted To: Sir Waqar Ahmad Qureshi
Assignment No 2
Question No: 1
The Laplace transform of the given equation is given by,
(
Now, Transfer Function= =
-Question No: 2
a) X(s) (
(t)
b)
c)
-Question No: 3
Th