Question bank- Static Force Analysis-Unit 1-VTU Dynamics of Machines-10ME54

Vidya Vikas Institute of Engineering & Technology, MYSURU

SEPTEMBER 2016 - Nov 2016              5^th Semester                  Dynamics of Machines 10ME54

Question Bank on       Static Force Analysis

Q 1.	The four bar linkage of shown in Fig. 1 below has crank 2 driven by an input torque T2. An external load P = 240 N acts at point O on the link 4. Find the required input torque to hold the mechanism in this position in equilibrium. Given = 50 mm, AB = 60 and = 70 mm, O2O4 = 100 mm.	Fig. 1
Q 2	Determine the shaft torque T2 at O2 for  static equilibrium with the shown external force. Given O2A= 40 mm, AB = 80 mm, O4B= 60 mm, and    AC = 30 mm. Refer fig. 2	Fig. 2
Q 3	Determine the torque T2, in Fig.3, required to overcome the force FE along the link 6.   AD=30 mm, AB=90 mm, O4 B=60 mm, DE=80 mm, O2 A=50mm, O2 O4 =70 mm	Fig. 3
Q 4	For the static equilibrium of the quick return mechanism shown in Fig. 4 determine the input torque T2 to be applied on link AB for a force of 300N on the slider D. The dimensions of the various links are OA= 400 mm, AB=200 mm, OC=800 mm, CD=300 mm.	Fig. 4
Q 5	Determine the torque T2, on link 2 shown in Fig. 5, required to keep the mechanism given in equilibrium. O2A = AB = O4B=30 MM,  O2O4 = 60 mm, Angle AO2O4 = 60º, BC = 19 mm, AD=15 mm.	Fig. 5
Q 6	A four bar linkage mechanism as shown in Fig.6 has the following dimensions and is acted upon by a force P = 80 N at an angle θ =150° on link DC.  Link dimensions are as follows: AD = 50 mm, AB = 40 mm, BC = 100 mm, DC = 75 mm and CE = 35 mm.  Determine the input torque T on the link AB for the static equilibrium of mechanism for the given configuration.	Fig. 6
Q 7	Determine the couple, T on link AB required for the equilibrium of the system shown in Fig. 7. AB = 200 mm; BC = 800 mm; BD = 300 mm.  Load P = 2000 N acts at angle of 45°to the connecting rod.	Fig. 7
Q 8	Determine the required input torque T1 for static equilibrium of the mechanism shown in Fig. 8. Torques T2 and T3 are pure torques, having magnitudes of 10 N-m and 7 N-m, respectively.	Fig. 8
Q 9	The dimensions of four bar link mechanism are AB = 400 mm, BC = 600 mm, CD = 500 mm, AD = 900 mm and DAB = 60°. AD is a fixed link, E is the point on link BC such that BE = 200 mm and CE = 400 mm. A force P of 150 N acts at 45° at a distance of 250 mm from D, as shown in Fig. 9. Another force Q = 100 N acts at E at an angle of 180°. Find the required input torque on link AB for static equilibrium of the mechanism.	Fig. 9
Q 10	For the slider crank mechanism shown in Fig. 10, determine the Torque T1 on link 1 required for static equilibrium.	Fig. 10
Q 11	For the four bar link mechanism shown in Fig. 11, determine the Torque on link 2 required for static equilibrium.	Fig.11
Q 12	For the four bar link mechanism shown in Fig. 12, determine the Torque on link 2 required for static equilibrium. AB = 30 mm, BC = 50 mm, CD = 70 mm, and AD = 80 mm.	Fig. 12
Q 13	For the mechanism shown in Fig. 13 find the required input torque for the static equilibrium. The lengths OA and AB are 250 mm and 650 mm respectively. F=500N	Fig. 13
Q14 To Q22	14.  Define and explain principle of virtual work with help of a slider mechanism. 15.  Explain with a neat sketch static force analysis of two and three force members. 16.  Explain the procedure for static force analysis of a four bar mechanism. 17.  Figure below shows a quaternary link ABCD under the action of forces F1, F2, F3 and F4 acting at A,B,C and D respectively. The link is in static equilibrium. Determine the magnitude of forces F2 & F3 and the direction of F3. 18.  What are the implications of considering friction in static force analysis? 19.  A body shown in is subjected to three forces F1, F2 and F3. State the condition for equilibrium of the body. If force F1 is completely known, F2 is known in direction only and F3 is completely unknown, explain how the problem can be solved. 20.  Explain the procedure for static force analysis of a slider crank mechanism. 21.  Discuss the equilibrium of the following systems:  i)                    Two force members ii)                  Three force members, and iii)                Member with Two forces and a torque. 22.  What is principle of Virtual work? Explain

Compiled by Dr. N. S. SRIRAM, VVIET, Mysore 

Compiled by N. S. SRIRAM, VVIET, Mysore

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