MEC 411 Lecture Notes - Lecture 1: Subroutine, Coefficient Matrix, Fictitious Force

• School: Ryerson University
• Department: Mechanical Engineering
• Course: MEC 411
• Professor: Shudong Yu

Document Summary

Dynamic force analysis, shaking force, shaking couple and. For the four bar mechanism shown below, determine analytically the input torque required to operate the mechanism at a constant angular speed throughout a cycle, the corresponding joint force magnitudes, the shaking force magnitude and shaking couple. If a point counterweight is attached to the follower at (rg4, 180 ) in relation to link b0b, determine the resulting shaking force and shaking couple. Home work: for this particular mechanism, can you come up with a better balancing scheme (i. e. , through attaching balancing weights) to further reduce the shaking force and couple. Note that balancing itself may increase the dynamic joint forces at a and: however, the dynamic forces transferred to the base must be minimized. Refer to the textbook and lecture notes for equations and notations concerning kinematics and dynamics of a planar rrrr mechanism.