應用力學(二) Dynamics

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31 Οκτ 2013 (πριν από 3 χρόνια και 7 μήνες)

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應用力學
(

)

Dy湡mics

朱銘祥教授


Instructor:

Prof. Ming
-
Shaung Ju (
朱銘祥教授
) (ME
Building 7th F Room 727, ext 62163)


Office hours: Thursday 2PM, Friday 2PM


Teaching Assistant:

黃繪禎

助教

(ME Building 12th F
Room C11, ext 62263)


Textbook:

R. C. Hibbeler,
Engineering Mechanics: Dynamics
,
12th Ed., 2009.


Reference:

J.L. Meriam, Engineering Mechanics:
Dynamics, 6th Ed., 2008.

What is Dynamics?

Branch of mechanics which deals with the motion
of bodies under the action of forces

Mechanics


Statics


effects of forces on bodies at rest


Dynamics


Kinematics


study of motion of bodies without
reference to forces which cause the motion


Kinetics


relates action of forces on bodies to their
resulting motion


History of Dynamics


Galileo
Galilei
, 1564
-
1642


Issac
Newton
, 1642
-
1727


Leonhard
Euler
, 1707
-
1783


Joseph L.
Lagrange
, 1736
-
1813


Applications of Dynamics


Modern machines and structures operated with
high speed (
acceleration
)


Analysis

&
design

of


Moving structure


Fixed structure subject to shock load


Robotic devices


Automatic control system


Rocket, missiles, spacecraft


Ground & air transportation vehicles


Machinery


Human movement

Procedures

1.
Read the problem & correlate
actual

physical

situation

with
theory

2.
Draw any
necessary

diagram

(e.g.
free
-
body
) &
tabulate problem data

3.
Establish a
coordinate

system

(
reference frame
) &
apply relevant
principles

(
mathematical

form)

4.
Solve necessary
equations

algebraically

then use a
consistent set of
units

& complete the solution

5.
Study the
answer

using technical
judgment

&
common sense

6.
Review the problem.

Example: pendulum


Outline

2/20 Introduction & Kinematics of a particle

3/7 Kinetics of a particle: Force and
Acceleration

3/14 Kinetics of a particle: Work and Energy

3/26 Kinetics of a particle: Impulse and
Momentum

4/9 Planar kinematics of a Rigid Body

4/23 Planar kinetics of a Rigid Body: Force and
Acceleration

Outline (cont

d)

5/7 Planar kinetics of a Rigid Body: Work and Energy

5/16 Planar kinetics of a Rigid Body: Impulse and
Momentum

5/28 Three
-
Dimensional Kinematics of a Rigid Body &
Overview of 3D Kinetics of a Rigid Body

6/13 Vibrations: under
-
damped free vibration, energy
method, undamped forced vibration, viscous damped
vibrations


Grading


Quiz and Homework 20%


1st Midterm 25%


2nd Midterm 25%


Final Exam 35%



Total = 105% ??

Notes:



Suggest to take lecture notes!


Homework

be assigned on a
weekly

basis, a
quiz

after a Chapter is finished


Homework should be
hand
-
written


Solutions to homework problem set will also be post at
FTP (140.116.155.72

Port

21

user: student,
password: student)