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COPRE - Sequence 3
François Marceau - Julie Roger
Décembre 2014

Table des matières
I

Annexes

2

1 Rappel des valeurs et expressions
1.1 Valeurs géométriques . . . . . . .
1.2 Efforts sur la pièce 4 . . . . . . .
1.3 Efforts sur la pièce 3 . . . . . . .
1.4 Efforts sur la pièce 2 . . . . . . .

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Première partie

Annexes
1

Rappel des valeurs et expressions

Ces expressions ont été rappelées dans le document Excel fourni. Dans un
−M ∗g∗(λ−a)− 21 ∗M4 ∗g∗(c−a)
souci de simplification, on posera X34 (λ) =
b+k∗tan(β)

1.1

Valeurs géométriques
a
b
c
h
m
l
d
β
k
λmin
λmax
M

1.2

=
=
=
=
=
=
=
=
=
=
=
=

200 mm
100 mm
2500 mm
3000 mm
3800 mm
1431, 78 mm
700 mm
0, 4324 rad
1300 mm
200 mm
2500 mm
200 kg

(1)

Efforts sur la pièce 4

 F  0
T5→4 = −M ∗ g





G4
Tpes→4




−


0




0
= −M4 ∗ g




X34
 E 
T3→4 = − tan(β) ∗ X34




−


0

(3)


−


0


−X34
 C 
T2→4 = tan(β) ∗ X34 + M ∗ g + M4 ∗ g


2

(2)

(4)


−


0

(5)

1.3

Efforts sur la pièce 3

Hypothèse : Pesanteur négligée.

−X34
 E 
T4→3 = − tan(β) ∗ X34





1.4

D
T2→3




X34

= tan(β) ∗ X34




−


0

(6)


−


0

(7)

Efforts sur la pièce 2

Hypothèse : Pesanteur négligée.


X34
−
 C 
T4→2 = −(tan(β) ∗ X34 + M ∗ g + M4 ∗ g) −



0



−X34
 D
T3→2 = − tan(β) ∗ X34





B
T1→2






0
= M ∗ g + M4 ∗ g



3


−


0

(8)

(9)







−d ∗ X34 − a ∗ ()



(10)






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