For procedures, see your mechanical laboratory manual.
Title: The Compound Pendulum as a means of determining the dynamic properties of an engine connecting rod
Aim
To determine the position of the center of gravity and the radius of gyration of an engine connecting rod.
Theory
Any swinging rigid body free to rotate about a fixed horizontal axis is called a compound pendulum or physical pendulum. A compound pendulum is a body formed from an assembly of particles of continuous shape that rotates rigidly around a pivot.
Connecting rods in internal combustion engines are subjected to high cyclic loads comprised of dynamic tensile and compressive loads. They must be capable of transmitting axial tension and compression loads, as well as sustain bending stresses caused by the thrust and pull on the piston and by the centrifugal force of the rotating crankshaft. The invention of the crank-connecting rod system has enabled the invention of numerous machines. The most notable of which is the internal combustion engine.
References
- The compound pendulum, The University of Texas.
- Nonlinear Physics with Mathematica for Scientists and Engineers pp (575-576).
- The Compound Pendulum, Physics 233, Simon Fraser University.
- Fundamentals of Physics: Resnick & Halliday.
- Practical physics: R.K. Shukla, Anchal Srivatsava, New Age International (P) Ltd, New Delhi.
- Kinematic and dynamic analysis of connecting rod for variable compression ratio diesel engine, Technical Research Organisation India.
2 Comments
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