# 應用力學(二) Dynamics

Mechanics

Oct 31, 2013 (4 years and 6 months ago)

110 views

(

)

Dy湡mics

Instructor:

Prof. Ming
-
Shaung Ju (

) (ME
Building 7th F Room 727, ext 62163)

Office hours: Thursday 2PM, Friday 2PM

Teaching Assistant:

(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)