COMPREHENSIVE
Machine Elements
問題一覧
1
It treats the laws governing the motion of the parts of a machine and the forces transmitted by these parts.
Science of Mechanism ( Theory of Machines)
2
It deals with the motion and forms of the parts of the machine and the manner of supporting and guiding them.
Pure mechanism or machine design
3
It is that branch of theory of machine which deals with the relative motion between the various parts of the machines.
Kinematics
4
It involves calculating forces. Selection of materials that can withstand these forces.
Constructive mechanism or Machine Design
5
It is that branch of theory of machine which deals with the forces and their effects, while acting upon the machine parts in motion.
Dynamics
6
It is that branch of theory of machine which deals with the inertia forces which arise from the combined effect of the mass and the motion of machine parts.
Kinetics
7
It is that branch of theory of machines which deals with the forces and their effects while the machine parts are at rest.
Static
8
Combination of resistant bodies.
Arranged that they compel the mechanical forces of nature to produce some effect or work.
-With certain determinate motions
- the term machine is usually referred to a complete product
Machine
9
- Combination of resistant bodies. Arranged that the motion of one compels the motion of the others.
- It is used to transfer and modify motion.
Mechanism
10
It is a combination of resistant bodies capable of transmitting forces or carrying loads but having no relative motion between parts.
Structure
11
It is a structure that supports the moving parts and regulates the path, or kind of motion, of many of the parts.
- may either be fixed to the earth or moving relative to the earth.
Frame
12
It is an infinitesimal part of a body represented on a drawing by a point.
- A line on a body may be thought of as a series of continuous particles arrangin line
Particle
13
One whose component particles remain at a constant distance from one another.
- It is assumed not to suffer any distortion by the forces that may act on it.
Rigid Body
14
Piece of mechanism which causes motion.
Driver
15
Piece of mechanism whose motion is affected.
Follower
16
- one element envelopes/encloses the other element
- the form of the element is geometrically identical
- surface contact exists between two members
Closed or Lower pair
17
- the elements does not enclose each other
- the elements are either in point or line contact
Higher Pair
18
Exchange of the fixedness of an element with its partner
Inversion of Pairs
19
- is indicated by change in position
- can either be absolute or relative
- determined by the path
- has direction and sense
Motion
20
When a point continues to move indefinitely in a given path in the same aense
Continuous Motion
21
When a point traverses the same path and reverses ots motion at the ends of such path.
Reciprocating Motion
22
The term applied to reciprocating circular motion. (eg. pendulum)
Oscillation
23
When the motion of a point is interrupted by the period of rest.
Intermittent Motion
24
Is the time rate of motion of a point along its path, expressed in linear unitsper unit of time .
Linear Speed
25
Is the time rate of turning a body about an axis ( and the rate it is changing direction), expressed in angular units per unit of time.
Angular Speed
26
A moving particle continues to move in a straight line covering equal distances in equal intervals of time.
- acceleration is zero
- velocity is constant
Uniform Motion
27
The speed changes by equal amounts in equal intervals of time.
- Acceleration is constant
Uniformly Varying Motion
28
When the acceleration of a moving object as a function of distance, velocity or time.
- can be solved analytically or graphically
Variable acceleration
29
If given distance and time
Graphical Differentation
30
If given acceleration and time.
Graphical Integration
31
A type of motion in which the acceleration varies directly as the displacement.
Harmonic Motion
32
An arm rotating or oscillating about an axis.
Crank
33
Two cranks rigidly connected to each other on the same axis.
Lever
34
Angle less than 90 degrees
Bell Crank Lever
35
Angle more than 90 degrees.
Rocker
36
A rigid piece which transmits force from one piece to another.
- processes at least two nodes which are points for attachment to other links.
Link
37
it consists a number of pairs of elements called links connected to each other by joints.
Linkage
38
An interconnected system of links in which not a single link is fixed.
Kinematic Chain
39
When one of the links in the chain is fixed.
Mechanism
40
It consists of two cranks attached to stationary piece at one end and connected to each other by a rigid rod or bar called connecting rod, coupler or floating link.
Four-bar linkage
41
Is a special form of a four-bar linkage with slider in which the center line of the slot passes through the center of the shaft.
Slider-Crank Mechanism
42
-Also call kinematic pairs.
-Is a connection between two or more links.
-Allows motion between the connected links
Joint
43
The number of inputs which needed to be provided in order to create a predictable output.
The number of independent coordinates required to define it’s position.
Degree of Freedom ( DOF)
44
A lower-pair joint reduces the mobility of a mechanism by ____________?
Two DOF
45
A high-pair joint reduces the mobility of a mechanism by ___________?
One DOF
46
Kutzbach’s Equation of mobility
m= 3(n-1)-2j1-j2
47
are linkages that do not behave behave as predicted by the Gruebler/kutzbach equation.
Gruebler Paradox
48
Is the process of choosing different links in the chain as frame.
Kinematic Inversion
49
Is relationship which predicts the rotation behavior of a four-bar linkage’s inversions based on the link lengths.
Grash of Condition
50
Class 1 Case ( Grash of linkage)
S+L < P+Q
51
ground either link adjacent to the shortest
Crank rocker
52
ground the shortest link
Double Crank
53
ground the link opposite the shortest
Double Rocker
54
Class 2 Case( Non-Grash of Linkage)
S+L>P+Q
55
Class 3 Case ( Special-case grashof)
S+L=P+Q
56
A special case of grashof condition where in all inversions can either be double cranks or crank rockers because of the presence of ___________?
change points
57
shortest link will fully rotate and the other link pivoted to ground will oscillate
Crank Rocker
58
input motion is duplicated at a remote locations
Parallegram
59
It is the creation of potential solutions in the absence of a well-defined algorithm which configures or predicts the solution.
Qualitative Synthesis
60
refers to the definition of the proper type of mechanism best suited to the problem.
Type Synthesis
61
determination of the proportion (lengths) of the links necessary to accomplish the desired motion.
Dimensional Synthesis
62
generation of one or more solutions of a particular type suitable to the problem and has a defined synthesis algorithm.
Quantitative/Analytical Synthesis
63
correlation of an input motion with an output motion in a mechanism.
Function Generation
64
control of a point in the plane such that it follows some prescribe path.
Path Generation
65
Control of a line in the plane such that it assumes some prescribed set of sequential positions.
Motion Generation
66
suitable for situations in which grashof crank rocker is desire
Function generation ( Rocker output)
67
-two positions of a line in the plane are defined as the output.
- will frequently result to a triple rocker mechanism
Motion Generation (Coupler Output)
68
two positions with complex displacement
Rocker output
69
is a point, common to two bodies in plane motion, where in the absolute instantaneous velocity in each body is the same. Also called “centros” or “poles”.
Instant Center
70
it remain in the same place for all configurations of the mechanism.
Fixed instant centers
71
it move when the mechanism move but the joints are of permanent nature.
Permanent instant centers
72
it vary with the configuration of the mechanism
Moving instant centers
73
for a mechanism containing n number of links,
Number of Instant center. |. N=n(n-1)/2
74
Any three bodies in plane motion will have exactly three instant centers, and they will lie on the same straight line.
Kennedy’s Rule
75
-rate of change of velocity in direction-sense
-perpendicular to the velocity of the particle at the give instant.
Centripetal, radial or normal component
76
- rate of change of velocity in magnitude
- parallel to the velocity of the particle at the given instant.
Tangential Component
77
-is a rate of change of velocity with respect to time.
-is a vector quantity and can be linear or angular.
Acceleration
問題一覧
1
It treats the laws governing the motion of the parts of a machine and the forces transmitted by these parts.
Science of Mechanism ( Theory of Machines)
2
It deals with the motion and forms of the parts of the machine and the manner of supporting and guiding them.
Pure mechanism or machine design
3
It is that branch of theory of machine which deals with the relative motion between the various parts of the machines.
Kinematics
4
It involves calculating forces. Selection of materials that can withstand these forces.
Constructive mechanism or Machine Design
5
It is that branch of theory of machine which deals with the forces and their effects, while acting upon the machine parts in motion.
Dynamics
6
It is that branch of theory of machine which deals with the inertia forces which arise from the combined effect of the mass and the motion of machine parts.
Kinetics
7
It is that branch of theory of machines which deals with the forces and their effects while the machine parts are at rest.
Static
8
Combination of resistant bodies.
Arranged that they compel the mechanical forces of nature to produce some effect or work.
-With certain determinate motions
- the term machine is usually referred to a complete product
Machine
9
- Combination of resistant bodies. Arranged that the motion of one compels the motion of the others.
- It is used to transfer and modify motion.
Mechanism
10
It is a combination of resistant bodies capable of transmitting forces or carrying loads but having no relative motion between parts.
Structure
11
It is a structure that supports the moving parts and regulates the path, or kind of motion, of many of the parts.
- may either be fixed to the earth or moving relative to the earth.
Frame
12
It is an infinitesimal part of a body represented on a drawing by a point.
- A line on a body may be thought of as a series of continuous particles arrangin line
Particle
13
One whose component particles remain at a constant distance from one another.
- It is assumed not to suffer any distortion by the forces that may act on it.
Rigid Body
14
Piece of mechanism which causes motion.
Driver
15
Piece of mechanism whose motion is affected.
Follower
16
- one element envelopes/encloses the other element
- the form of the element is geometrically identical
- surface contact exists between two members
Closed or Lower pair
17
- the elements does not enclose each other
- the elements are either in point or line contact
Higher Pair
18
Exchange of the fixedness of an element with its partner
Inversion of Pairs
19
- is indicated by change in position
- can either be absolute or relative
- determined by the path
- has direction and sense
Motion
20
When a point continues to move indefinitely in a given path in the same aense
Continuous Motion
21
When a point traverses the same path and reverses ots motion at the ends of such path.
Reciprocating Motion
22
The term applied to reciprocating circular motion. (eg. pendulum)
Oscillation
23
When the motion of a point is interrupted by the period of rest.
Intermittent Motion
24
Is the time rate of motion of a point along its path, expressed in linear unitsper unit of time .
Linear Speed
25
Is the time rate of turning a body about an axis ( and the rate it is changing direction), expressed in angular units per unit of time.
Angular Speed
26
A moving particle continues to move in a straight line covering equal distances in equal intervals of time.
- acceleration is zero
- velocity is constant
Uniform Motion
27
The speed changes by equal amounts in equal intervals of time.
- Acceleration is constant
Uniformly Varying Motion
28
When the acceleration of a moving object as a function of distance, velocity or time.
- can be solved analytically or graphically
Variable acceleration
29
If given distance and time
Graphical Differentation
30
If given acceleration and time.
Graphical Integration
31
A type of motion in which the acceleration varies directly as the displacement.
Harmonic Motion
32
An arm rotating or oscillating about an axis.
Crank
33
Two cranks rigidly connected to each other on the same axis.
Lever
34
Angle less than 90 degrees
Bell Crank Lever
35
Angle more than 90 degrees.
Rocker
36
A rigid piece which transmits force from one piece to another.
- processes at least two nodes which are points for attachment to other links.
Link
37
it consists a number of pairs of elements called links connected to each other by joints.
Linkage
38
An interconnected system of links in which not a single link is fixed.
Kinematic Chain
39
When one of the links in the chain is fixed.
Mechanism
40
It consists of two cranks attached to stationary piece at one end and connected to each other by a rigid rod or bar called connecting rod, coupler or floating link.
Four-bar linkage
41
Is a special form of a four-bar linkage with slider in which the center line of the slot passes through the center of the shaft.
Slider-Crank Mechanism
42
-Also call kinematic pairs.
-Is a connection between two or more links.
-Allows motion between the connected links
Joint
43
The number of inputs which needed to be provided in order to create a predictable output.
The number of independent coordinates required to define it’s position.
Degree of Freedom ( DOF)
44
A lower-pair joint reduces the mobility of a mechanism by ____________?
Two DOF
45
A high-pair joint reduces the mobility of a mechanism by ___________?
One DOF
46
Kutzbach’s Equation of mobility
m= 3(n-1)-2j1-j2
47
are linkages that do not behave behave as predicted by the Gruebler/kutzbach equation.
Gruebler Paradox
48
Is the process of choosing different links in the chain as frame.
Kinematic Inversion
49
Is relationship which predicts the rotation behavior of a four-bar linkage’s inversions based on the link lengths.
Grash of Condition
50
Class 1 Case ( Grash of linkage)
S+L < P+Q
51
ground either link adjacent to the shortest
Crank rocker
52
ground the shortest link
Double Crank
53
ground the link opposite the shortest
Double Rocker
54
Class 2 Case( Non-Grash of Linkage)
S+L>P+Q
55
Class 3 Case ( Special-case grashof)
S+L=P+Q
56
A special case of grashof condition where in all inversions can either be double cranks or crank rockers because of the presence of ___________?
change points
57
shortest link will fully rotate and the other link pivoted to ground will oscillate
Crank Rocker
58
input motion is duplicated at a remote locations
Parallegram
59
It is the creation of potential solutions in the absence of a well-defined algorithm which configures or predicts the solution.
Qualitative Synthesis
60
refers to the definition of the proper type of mechanism best suited to the problem.
Type Synthesis
61
determination of the proportion (lengths) of the links necessary to accomplish the desired motion.
Dimensional Synthesis
62
generation of one or more solutions of a particular type suitable to the problem and has a defined synthesis algorithm.
Quantitative/Analytical Synthesis
63
correlation of an input motion with an output motion in a mechanism.
Function Generation
64
control of a point in the plane such that it follows some prescribe path.
Path Generation
65
Control of a line in the plane such that it assumes some prescribed set of sequential positions.
Motion Generation
66
suitable for situations in which grashof crank rocker is desire
Function generation ( Rocker output)
67
-two positions of a line in the plane are defined as the output.
- will frequently result to a triple rocker mechanism
Motion Generation (Coupler Output)
68
two positions with complex displacement
Rocker output
69
is a point, common to two bodies in plane motion, where in the absolute instantaneous velocity in each body is the same. Also called “centros” or “poles”.
Instant Center
70
it remain in the same place for all configurations of the mechanism.
Fixed instant centers
71
it move when the mechanism move but the joints are of permanent nature.
Permanent instant centers
72
it vary with the configuration of the mechanism
Moving instant centers
73
for a mechanism containing n number of links,
Number of Instant center. |. N=n(n-1)/2
74
Any three bodies in plane motion will have exactly three instant centers, and they will lie on the same straight line.
Kennedy’s Rule
75
-rate of change of velocity in direction-sense
-perpendicular to the velocity of the particle at the give instant.
Centripetal, radial or normal component
76
- rate of change of velocity in magnitude
- parallel to the velocity of the particle at the given instant.
Tangential Component
77
-is a rate of change of velocity with respect to time.
-is a vector quantity and can be linear or angular.
Acceleration