¢…ˆ²´ §³§œ© - ¨®´...

Download ¢…ˆ²´ §³§Œ© - ¨®´ ¯ˆ…

If you can't read please download the document

Post on 08-Jan-2017

97 views

Category:

Education

5 download

Embed Size (px)

TRANSCRIPT

  • : 1-2( ) 2-2( ) 3-2 4-2 5-2

    1

    faradars.org/fvmec94053

    FaraDars.org

  • 1-1

    2

    faradars.org/fvmec94053

    FaraDars.org

  • 3

    .

    .

    .

    . ( )

    :

    faradars.org/fvmec94053

    FaraDars.org

  • 4

    faradars.org/fvmec94053

    FaraDars.org

  • 5

    faradars.org/fvmec94053

    FaraDars.org

  • ( ) 1-2

    6

    :

    ( ) ( 1

    faradars.org/fvmec94053

    FaraDars.org

  • 7

    faradars.org/fvmec94053

    FaraDars.org

  • 8

    faradars.org/fvmec94053

    FaraDars.org

  • 9

    :

    ft 6ft 12lb 1000ft 24lb 2000

    0

    E

    MC

    lb 000,10E

    xx CF 0 0xC

    yy CF lb 10,000 lb 1000 - lb 20000 lb 7000yC

    FaraDars.org

  • 10

    Joint A is subjected to only two unknown member forces. Determine these from the

    joint equilibrium requirements.

    534

    lb 2000 ADAB FF CF

    TF

    AD

    AB

    lb 2500

    lb 1500

    There are now only two unknown member

    forces at joint D.

    DADEDADB

    FF

    FF

    532

    CF

    TF

    DE

    DB

    lb 3000

    lb 2500

    faradars.org/fvmec94053

    FaraDars.org

  • 11

    lb 3750

    25001000054

    54

    BE

    BEy

    F

    FF

    CFBE lb 3750

    lb 5250

    375025001500053

    53

    BC

    BCx

    F

    FF

    TFBC lb 5250

    lb 8750

    37503000053

    53

    EC

    ECx

    F

    FF

    CFEC lb 8750

    FaraDars.org

  • 12

    checks 087507000

    checks 087505250

    54

    53

    y

    x

    F

    F

    faradars.org/fvmec94053

    FaraDars.org

  • 13

    : ( 2

    .

    .

    FaraDars.org

  • : FH,GH,GI

    14

    kN 5.12

    kN 200

    kN 5.7

    m 25kN 1m 25kN 1m 20

    kN 6m 15kN 6m 10kN 6m 50

    A

    ALF

    L

    L

    M

    y

    A

    FaraDars.org

  • 15

    kN 13.13

    0m 33.5m 5kN 1m 10kN 7.50

    0

    GI

    GI

    H

    F

    F

    M

    TFGI kN 13.13

    faradars.org/fvmec94053

    FaraDars.org

  • 16

    kN 82.13

    0m 8cos

    m 5kN 1m 10kN 1m 15kN 7.5

    0

    07.285333.0m 15

    m 8tan

    FH

    FH

    G

    F

    F

    M

    GL

    FG

    CFFH kN 82.13

    kN 371.1

    0m 10cosm 5kN 1m 10kN 1

    0

    15.439375.0m 8

    m 5tan

    32

    GH

    GH

    L

    F

    F

    M

    HI

    GI

    CFGH kN 371.1

    faradars.org/fvmec94053

    FaraDars.org

  • ( ) 3-2

    17

    . 3 . .

    = 0 = F

    . 2 3 . .

    = 0

    ( 180 ) 2 .

    = 0

    0

    = 0

    0

    FaraDars.org

  • :

    18

    100N

    7

    faradars.org/fvmec94053

    FaraDars.org

  • 19

    FaraDars.org

  • 20

    FaraDars.org

  • 21

    FaraDars.org

  • 22

    FaraDars.org

  • 23

    FaraDars.org

  • 24

    FaraDars.org

  • 25

    FaraDars.org

  • 26

    faradars.org/fvmec94053

    FaraDars.org

  • 27

    faradars.org/fvmec94053

    FaraDars.org

  • 28

    FaraDars.org

  • 29

    Pb

    aQbQaPM A 0

    FaraDars.org

  • 30

    4-2

    . 15 :

    :

    ( ) ( = ( + ) )-( 2 )( ) ( = ( + ) )-( 2 )

    .

    faradars.org/fvmec94053

    FaraDars.org

  • 31

    5-2

    : CD -1

    1)p65

    2 )p65

    3 )p56

    4 )p65

    83

    = 0 , 4 = 0

    sin =9

    15=3

    5 = 8 sin =

    24

    5

    24

    5 4 = 0 =

    5

    6

    faradars.org/fvmec94053

    FaraDars.org

  • 32

    -2

    1)CD

    2 )BH

    3 )HG

    4 )BG

    89

    faradars.org/fvmec94053

    FaraDars.org

  • 33

    : B -3

    (1N400

    (2N480/7

    (3N333/3

    (4N427/2

    85

    tan =8

    6=4

    3, sin =

    4

    5, cos =

    3

    5, =

    1

    2 = 4

    = 0 ( sin ) 4 50 4 4 = 0 = 250

    = 0 , 4 50 4 8 = 0 = 400

    = 0 , 250 cos = 0 = 250 3

    5= 150 = 4002 + 1502 = 427/2

    faradars.org/fvmec94053

    FaraDars.org

  • 34

    .

    .

    faradars.org/fvmec94053

    faradars.org/fvmec94053

    FaraDars.org

    http://faradars.org/fvmec94053