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For the crossed four bar mechanism shown in Fig.1, The dimensions of various links are: CD = 65 mm; C A = 60 mm; DB = 80 mm; and AB=55 mm. Find the angular velocity and angular accelerations of the links A B and DB, if the crank CA rotates at 100 rpm. in the anticlockwise direction. USING RELATIVE VELOCITY METHOD

Question-Answer › Category: Theory Of Machines › For the crossed four bar mechanism shown in Fig.1, The dimensions of various links are: CD = 65 mm; C A = 60 mm; DB = 80 mm; and AB=55 mm. Find the angular velocity and angular accelerations of the links A B and DB, if the crank CA rotates at 100 rpm. in the anticlockwise direction. USING RELATIVE VELOCITY METHOD
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RS Khurmi asked 11 months ago

For the crossed four bar mechanism shown in Fig.1, The dimensions of various links are: CD = 65 mm; C A = 60 mm; DB = 80 mm; and AB=55 mm. Find the angular velocity and angular accelerations of the links A B and DB, if the crank CA rotates at 100 rpm. in the anticlockwise direction. USING RELATIVE VELOCITY METHOD
1. For the crossed four bar mechanism shown in Fig.1, The dimensions of various links are: CD = 65 mm; C A = 60 mm; DB = 80 m

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Mazurek Gravity answered 11 months ago

 USING RELATIVE VELOCITY METHOD

 

SPACE DIAGRAM VELOCITY. DIAGRAM 8 105 YAB 1059 450 100 rpm VABA 1 30 BY DUB KVDO SCALE Icm= 100T db 4.5cm ab = 5.5cm from giv VAB: 5.5 x 1100 TT) 550 TT mm mm/sec WAB TOT VAB 550 FT AB 55 =oT rad /sec. Ccounterclockwise) Vos = 4.5*(100m) 4507 mon/seclagale (OB) a cd (aeda labor SCALE ; Icm = 200012 mm/s² 3(amos = (450 )? 80 from acederation diagram (at)pe - 1986), - 1201 = 18 2 (200072) - 80002 - 0) (08) TO ſa tangential Cabr =
Therefore
Angular velocity of AB = 10π rad/sec (CCW)
Angular velocity of DB = 5.625π rad/sec (CCW)
Angular acceleration of AB = 1000(π)² rad/sec²
Angular acceleration of DB = (7000/55)π² rad/sec²
 

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